Showing papers by "Oklahoma State University–Stillwater published in 2005"
TL;DR: In this article, a more comprehensive model of the antecedents of positive word of mouth (WOM) was developed and tested, including consumer identification and commitment, using data obtained from customers of a retailer offering both products and services, finding support for all hypothesized relationships with WOM intentions and/or WOM behaviors as the dependent variable.
Abstract: Empirical studies investigating the antecedents of positive word of mouth (WOM) typically focus on the direct effects of consumers’ satisfaction and dissatisfaction with previous purchasing experiences. The authors develop and test a more comprehensive model of the antecedents of positive. WOM (both intentions and behaviors), including consumer identification and commitment. Specifically, they hypothesize and test commitment as a mediator and moderator of satisfaction on positive WOM and commitment as a mediator of identification on WOM. Using data obtained from customers of a retailer offering both products and services, they find support for all hypothesized relationships with WOM intentions and/or WOM behaviors as the dependent variable. The authors conclude with a discussion of their findings and implications for both marketing theory and practice.
1,081 citations
TL;DR: The comparative study of multiple prediction models for breast cancer survivability using a large dataset along with a 10-fold cross-validation provided us with an insight into the relative prediction ability of different data mining methods.
1,074 citations
TL;DR: It is shown that this approach can predict transcriptional responses to single gene–perturbation experiments using gene-expression data in the context of a segregating mouse population and the utility of this approach is demonstrated by identifying and experimentally validating the involvement of three new genes in susceptibility to obesity.
Abstract: A key goal of biomedical research is to elucidate the complex network of gene interactions underlying complex traits such as common human diseases. Here we detail a multistep procedure for identifying potential key drivers of complex traits that integrates DNA-variation and gene-expression data with other complex trait data in segregating mouse populations. Ordering gene expression traits relative to one another and relative to other complex traits is achieved by systematically testing whether variations in DNA that lead to variations in relative transcript abundances statistically support an independent, causative or reactive function relative to the complex traits under consideration. We show that this approach can predict transcriptional responses to single gene–perturbation experiments using gene-expression data in the context of a segregating mouse population. We also demonstrate the utility of this approach by identifying and experimentally validating the involvement of three new genes in susceptibility to obesity.
1,066 citations
TL;DR: In this paper, the authors investigated the relationships of the in-role performance and organizational citizenship behavior of the employees in an organization with their trust in their plant managers and found that the trust in managers was correlated with organizational citizenship behaviour.
Abstract: This study investigated the relationships of the in-role performance and organizational citizenship behavior (OCB) of the employees in an organization with their trust in their plant managers and t...
1,065 citations
TL;DR: This study investigated the performance of two feature selection algorithms involving Bayesian networks and Classification and Regression Trees and an ensemble of BN and CART and proposed an hybrid architecture for combining different feature selection algorithm for real world intrusion detection.
634 citations
TL;DR: In this article, the authors examined the underlying dimensions of brand equity and how they affect firms' performance in the hospitality industry and found that brand loyalty, perceived quality, and brand image are important components of customer-based brand equity.
601 citations
TL;DR: Results showed significant influence of blending gelatin with chitosan on scaffold properties and cellular behavior, and Mechanical properties of chitOSan are affected by the addition of gelatin although there was no clear trend.
569 citations
TL;DR: This paper examined the effects of social exchange processes between alliance partners on the extent of learning and knowledge transfer in a strategic alliance and found that social exchanges such as reciprocal commitment, trust, and mutual influence between partners are positively related to learning in strategic alliances.
Abstract: Although social interactions and exchanges between partners are emphasized as imperative for alliance success, comprehensive examination of how social exchanges facilitate learning and knowledge transfer in strategic alliances is lacking. Drawing on social exchange theory, we examined the effects of social exchange processes between alliance partners on the extent of learning and knowledge transfer in a strategic alliance. An empirical examination of data collected from alliance managers of 144 strategic alliances revealed that social exchanges such as reciprocal commitment, trust, and mutual influence between partners are positively related to learning and knowledge transfer in strategic alliances.
532 citations
TL;DR: This paper examined teachers' implementation of treatment plans following consultation Interventions were implemented for 45 elementary school students referred for consultation and intervention and intervention was implemented for each of the 45 children referred for intervention.
Abstract: This study examined teachers' implementation of treatment plans following consultation Interventions were implemented for 45 elementary school students referred for consultation and intervention d
482 citations
TL;DR: In this article, the authors synthesize the ecological concepts and perspectives underpinning the development and application of state-and-transition models, thresholds, and rangeland health.
399 citations
TL;DR: 50:50 blends when processed at 55 degrees C in an oven showed significant improvement in mechanical properties as well as support for cellular activity relative to chitosan.
TL;DR: In this paper, the authors examined the relationship between employee service orientation (customer focus, organizational support, and service under pressure) and employees' job satisfaction, organizational commitment, and employees’ intention of leaving.
TL;DR: It is suggested that the efficiency of macromolecular dispersion agents for NT solubilization correlates with the topological and electronic similarity of polymer-NT and NT-NT interactions in the nanotube bundles.
Abstract: Poor solubility of single-walled and multiwalled carbon nanotubes (NTs) in water and organic solvents presents a considerable challenge for their purification and applications. Macromolecules can be convenient solubilizing agents for NTs and a structural element of composite materials for them. Several block copolymers with different chemical functionalities of the side groups were tested for the preparation of aqueous NT dispersions. Poly(N-cetyl-4-vinylpyridinium bromide-co-N-ethyl-4-vinylpyridinium bromide-co-4-vinylpyridine) was found to form exceptionally stable NT dispersions. It is suggested that the efficiency of macromolecular dispersion agents for NT solubilization correlates with the topological and electronic similarity of polymer-NT and NT-NT interactions in the nanotube bundles. Raman spectroscopy and atomic force and transmission electron microcopies data indicate that the polycations are wrapped around NTs forming a uniform coating 1.0-1.5 nm thick. The ability to wind around the NT originates in the hydrophobic attraction of the polymer backbone to the graphene surface and topological matching. Tetraalkylammonium functional groups in the side chains of the macromolecule create a cloud of positive charge around NTs, which makes them hydrophilic. The prepared dispersions could facilitate the processing of the nanotubes into composites with high nanotube loading for electronic materials and sensing. Positive charge on their surface is particularly important for biological and biomedical applications because it strengthens interactions with negatively charged cell membranes. A high degree of spontaneous bundle separation afforded by the polymer coating can also be beneficial for NT sorting.
TL;DR: Results indicate that COR is required both for overcoming or suppressing SA-dependent defences during growth in plant tissue and for normal disease symptom development in A. thaliana.
Abstract: SUMMARY Successful pathogen infection likely involves the suppression of general antimicrobial host defences. One Pseudomonas syringae virulence factor proposed to act in this manner is coronatine (COR), a phytotoxin believed to function as an analogue of one or more jasmonates, a family of plant growth regulators. COR biosynthetic (COR ‐ ) mutants of P. syringae pv. tomato strain DC3000 exhibit reduced virulence on Arabidopsis thaliana and tomato . In the present study, three genetically and biochemically defined COR ‐ mutants of DC3000 were used to explore potential effects of COR and its precursors, coronafacic acid (CFA) and coronamic acid (CMA), on defence signalling pathways in A. thaliana . Inoculation with wild-type DC3000 resulted in the accumulation of several jasmonate-responsive transcripts, whereas infection with a mutant strain that accumulates CFA, which is structurally similar to methyl jasmonate (MeJA), did not. Thus, COR, but not CFA, stimulates jasmonate signalling during P. syringae infection of A. thaliana . The ability of the COR ‐ mutants to grow to high levels in planta was fully restored in A. thaliana lines deficient for salicylic acid (SA) accumulation. Although the COR ‐ mutants grew to high levels in SA-deficient plants, disease symptoms were reduced in these plants. Collectively, these results indicate that COR is required both for overcoming or suppressing SA-dependent defences during growth in plant tissue and for normal disease symptom development in A. thaliana .
04 Apr 2005
TL;DR: Analytical and experimental results show that in comparison to SMAC, PMAC achieves more power savings under light loads, and higher throughput under heavier traffic loads.
Abstract: We propose a novel adaptive MAC protocol for wireless sensor networks. In existing protocols such as SMAC, the sensor nodes are put to sleep periodically to save energy. As the duty cycle is fixed in such protocols, the network throughput can degrade under heavy traffic, while under light loads, unwanted energy consumption can occur. In the proposed pattern-MAC (PMAC) protocol, instead of having fixed sleep-wakeups, the sleep-wakeup schedules of the sensor nodes are adaptively determined. The schedules are decided based on a node's own traffic and that of its neighbors. Our analytical and experimental results show that in comparison to SMAC, PMAC achieves more power savings under light loads, and higher throughput under heavier traffic loads. Furthermore, unlike SMAC, only the sensor nodes involved in communication wake up frequently in PMAC and hence energy is conserved in other sensor nodes.
TL;DR: This paper elaborate on how the constrained optimization problem requires a balance of exploration and exploitation under different problem scenarios and come to the conclusion that a nondominated ranking between the individuals will help the algorithm explore further, while the elitist scheme will facilitate in exploitation.
Abstract: In this paper, we propose a generic, two-phase framework for solving constrained optimization problems using genetic algorithms. In the first phase of the algorithm, the objective function is completely disregarded and the constrained optimization problem is treated as a constraint satisfaction problem. The genetic search is directed toward minimizing the constraint violation of the solutions and eventually finding a feasible solution. A linear rank-based approach is used to assign fitness values to the individuals. The solution with the least constraint violation is archived as the elite solution in the population. In the second phase, the simultaneous optimization of the objective function and the satisfaction of the constraints are treated as a biobjective optimization problem. We elaborate on how the constrained optimization problem requires a balance of exploration and exploitation under different problem scenarios and come to the conclusion that a nondominated ranking between the individuals will help the algorithm explore further, while the elitist scheme will facilitate in exploitation. We analyze the proposed algorithm under different problem scenarios using Test Case Generator-2 and demonstrate the proposed algorithm's capability to perform well independent of various problem characteristics. In addition, the proposed algorithm performs competitively with the state-of-the-art constraint optimization algorithms on 11 test cases which were widely studied benchmark functions in literature.
TL;DR: It is found that stakeholder management typically reduces the rewards CEOs may get for increasing levels of financial performance, and this results indicate that CEOs may jeopardize their personal wealth by pursuing stakeholder-related initiatives.
Abstract: We test the effects of stakeholder management on CEOs' salaries, bonuses, stock options, and total compensation. We also examine the extent to which the interaction of stakeholder management and financial performance determines compensation. Using a longitudinal database of 406 Fortune 1000 firms, our results suggest that stakeholder management is relevant to boards of directors when setting CEO compensation. Specifically, we found a significant, negative main effect of stakeholder management on CEO salaries. Further, we found that stakeholder management typically reduces the rewards CEOs may get for increasing levels of financial performance. In tandem, these results indicate that CEOs may jeopardize their personal wealth by pursuing stakeholder-related initiatives. Copyright © 2005 John Wiley & Sons, Ltd.
TL;DR: This paper found that risk preferences elicited through context-less lottery choices are significantly related to consumers' stated preferences for genetically modified (GM) food, which has important implications for explaining consumer behavior.
Abstract: Consumers' risk preferences are often overlooked in studies of consumer demand for risky food. We find that risk preferences elicited through context-less lottery choices are significantly related to consumers' stated preferences for genetically modified (GM) food. These results suggest risk preferences elicited in the laboratory are not artificial in the sense that they appear to be related to the same risk preferences that govern other individual decisions such as food choice. Consistent with theoretical expectations, risk perceptions and risk preferences were found to be significant determinants of acceptance of GM food, which has important implications for explaining consumer behavior.
TL;DR: This study determined the effect of wavelength on proliferation of cultured murine cells and found that low‐intensity laser light‐stimulated cell proliferation was higher in women than in men.
Abstract: Background and Objectives
There exist contradictory reports about low-intensity laser light-stimulated cell proliferation. The purpose of this study was to determine the effect of wavelength on proliferation of cultured murine cells.
Study Design/Materials and Methods
Proliferation of primary cell cultures was measured after irradiation with varying laser wavelengths.
Results
Fibroblasts proliferated faster than endothelial cells in response to laser irradiation. Maximum cell proliferation occurred with 665 and 675 nm light, whereas 810 nm light was inhibitory to fibroblasts.
Conclusions
These observations suggest that both wavelength and cell type influence the cell proliferation response to low-intensity laser irradiation. Lasers Surg. Med. 36:8–12, 2005. © 2005 Wiley-Liss, Inc.
TL;DR: Reports indicate that a number of cholinesterase inhibitors have additional sites of action that may have pharmacologic or toxicologic relevance, and studies of interactive toxicity of binary mixtures of common organophosphorus insecticides indicate that non-cholinesTERase targets may be important in cumulative toxicity.
TL;DR: The WheatN.1.0 algorithm as discussed by the authors combines some of the current concepts for N management in cereal production into an applied algorithm. But it does not follow any kind of generalized methodology that guarantees maximum nitrogen use efficiency (NUE).
Abstract: Nitrogen (N) fertilization for cereal crop production does not follow any kind of generalized methodology that guarantees maximum nitrogen use efficiency (NUE). The objective of this work was to amalgamate some of the current concepts for N management in cereal production into an applied algorithm. This work at Oklahoma State University from 1992 to present has focused primarily on the use of optical sensors in red and near infrared bands for predicting yield, and using that information in an algorithm to estimate fertilizer requirements. The current algorithm, “WheatN.1.0,” may be separated into several discreet components: 1) mid‐season prediction of grain yield, determined by dividing the normalized difference vegetative index (NDVI) by the number of days from planting to sensing (estimate of biomass produced per day on the specific date when sensor readings are collected); 2) estimating temporally dependent responsiveness to applied N by placing non‐N‐limiting strips in production fields each...
TL;DR: The authors argue that self-transcendent values and positive other-directed emotions are important determinants of authentic leadership, and they introduce an interactive approach to the cognitive and emotional processes that motivate authentic leaders to act in ways that are consistent with their self-transforment values.
Abstract: In response to concerns about the morality of inspirational styles of leadership, this article incorporates current theory from the emotion and positive psychology literatures to present an alternative approach to the role of emotions in leadership. Rather than focusing on the detrimental effects of affective responses, this approach suggests that frequent experiences of positive other-directed emotions motivate leaders to act on their other-regarding values [Oakley, J. 1992. Morality and the emotions. London: Routledge]. We begin by arguing that self-transcendent values and positive other-directed emotions are important determinants of authentic leadership. Then, we introduce an interactive approach to the cognitive and emotional processes that motivate authentic leaders to act in ways that are consistent with their self-transcendent values.
TL;DR: In this article, a model that integrates four consumer characteristic variables (price consciousness, value consciousness, perceived price variation, and consumer innovativeness) toward PB attitude and purchase intention was proposed.
Abstract: Purpose – Despite proven strategic significance and wide acceptance of private label products (PB), our understanding of PB in international markets is limited. The purposes of this study are to propose a model that integrates four consumer characteristic variables (price consciousness, value consciousness, perceived price variation, and consumer innovativeness) toward PB attitude and purchase intention, and to test the model in two product categories, grocery and home appliances, in a South Korean discount store context.Design/methodology/approach – A total of 168 usable data (87 for food and 81 for home appliances were collected using mall intercept method from female shoppers at one Korean discount store in Seoul, Korea.Findings – The findings revealed that, depending on the product category, contribution of the factors varies. Among four consumer characteristics, only three in each category exhibited direct and indirect association with PB purchase intention. Perceived quality variability in a food ca...
TL;DR: In this paper, the authors studied the long time behavior of the solutions to the two dimensional dissipative quasi-geostrophic equations and obtained a new positivity lemma which improved a previous version of A. Cordoba and D. Duygulu.
Abstract: The long time behavior of the solutions to the two dimensional dissipative quasi-geostrophic equations is studied. We obtain a new positivity lemma which improves a previous version of A. Cordoba and D. Cordoba [10] and [11]. As an application of the new positivity lemma, we obtain the new maximum principle, i.e. the decay of the solution in Lp for anyp ∈ [2,+∞) when f is zero. As a second application of the new positivity lemma, for the sub-critical dissipative case with Open image in new window the existence of the global attractor for the solutions in the space Hs for any s>2(1−α) is proved for the case when the time independent f is non-zero. Therefore, the global attractor is infinitely smooth if f is. This significantly improves the previous result of Berselli [2] which proves the existence of an attractor in some weak sense. For the case α=1, the global attractor exists in Hs for any s≥0 and the estimate of the Hausdorff and fractal dimensions of the global attractor is also available.
TL;DR: Using Crotaphytus collaris, a sexually dimorphic lizard in which males use the head as a weapon when territorial interactions escalate to fights, the hypothesis that weapon performance is a better predictor of fitness than body or weapon size is tested.
Abstract: In territorial polygynous taxa, reproductive success reflects phenotypic variation. Using Crotaphytus collaris, a sexually dimorphic lizard in which males use the head (i.e., jaws and associated musculature) as a weapon when territorial interactions escalate to fights, we tested the hypothesis that weapon performance (i.e., bite force) is a better predictor of fitness than body or weapon size. Bite‐force performance predicted the number of female home ranges overlapped, estimated mating success, and potential reproductive output. However, no body or weapon size measure correlated with these estimates of fitness, and only one weapon dimension (head width) correlated with bite force. These results indicate that weapon performance has far stronger effects on fitness than body or weapon size, likely because it directly influences fight outcomes. As such, it is desirable that the use of morphology as a proxy for performance and its presumed extensions to fitness be based on empirical morphology‐perfo...
TL;DR: In this paper, gas adsorption was measured for methane, nitrogen, CO2 and their binary and ternary mixtures on a wet Tiffany coal sample at 3276 K (1300 F) at pressures to 138 MPa (2000 psia) and the expected uncertainties in the amounts adsorbed vary with pressure and composition.
TL;DR: In this paper, the authors extend previous work in this area by proposing relationships between personality influencers, goal orientations, customer/selling orientation, and overall work satisfaction, using data obtained from a sample of 190 real estate agents.
Abstract: Several scholars have noted the importance of relationship marketing and the critical role that salesperson knowledge plays in the formation of buyer-seller relationships. However, research on salesperson learning motivations has been relatively scarce compared with research on firm-level learning orientations. One promising stream of research in this area is salesperson goal orientation. Drawing from previous work in control theory, the authors extend previous research in this area by proposing relationships between personality influencers, goal orientations, customer/selling orientation, and overall work satisfaction. Their hypotheses are tested using data obtained from a sample of 190 real estate agents. The results provide support for their hypothesized model. Specifically, learning orientation is shown to positively influence customer orientation, while performance orientation is shown to positively influence selling orientation.
TL;DR: This paper investigated the effect of several commonly used experimental designs on willingness-to-pay in a Monte Carlo environment where true utility parameters are known, and found that random designs or designs that explicitly incorporated attribute interactions generated more precise valuation estimates than main effects only designs.
Abstract: In this article, we investigate the effect of several commonly used experimental designs on willingness-to-pay in a Monte Carlo environment where true utility parameters are known. All experimental designs considered in this study generated unbiased valuation estimates. However, random designs or designs that explicitly incorporated attribute interactions generated more precise valuation estimates than main effects only designs. A key result of our analysis is that a large sample size can substitute for a poor experimental design. Overall, our results indicate that certain steps can be taken to achieve a manageably sized experimental design without sacrificing the credibility of welfare estimates.
TL;DR: In this article, the authors provide an overview of almost 30 years of broad-based, stock-market-oriented academic studies that address one or more of the following questions:==================¯¯¯¯•Are interest rate, exchange rate, and commodity price risks reflected in stock price movements?============
Abstract: The fact that 92% of the world's 500 largest companies recently reported using derivatives suggests that corporate managers believe financial risk management can increase shareholder value. Surveys of finance academics indicate that they too believe that corporate risk management is, on the whole, a valueadding activity. This article provides an overview of almost 30 years of broadbased, stock-market-oriented academic studies that address one or more of the following questions:
•Are interest rate, exchange rate, and commodity price risks reflected in stock price movements?
•Is volatility in corporate earnings and cash flows related in a systematic way to corporate market values?
•Is the corporate use of derivatives associated with reduced risk and higher market values?
The answer to the first question, at least in the case of financial institutions and interest rate risk, is a definite yes; all studies with this focus find that the stock returns of financial firms are clearly sensitive to interest rate changes. The stock returns of industrial companies exhibit no pronounced interest rate exposure (at least as a group), but industrial firms with significant cross-border revenues and costs show considerable sensitivity to exchange rates (although such sensitivity actually appears to be reduced by the size and geographical diversity of the largest multinationals). What's more, the corporate use of derivatives to hedge interest rate and currency exposures appears to be associated with lower sensitivity of stock returns to interest rate and FX changes.
But does the resulting reduction in price sensitivity affect value—and, if so, how? Consistent with a widely cited theory that risk management increases value by limiting the corporate “underinvestment problem,” a number of studies show a correlation between lower cash flow volatility and higher corporate investment and market values. The article also cites a small but growing group of studies that show a strong positive association between derivatives use and stock price performance (typically measured using price-to-book ratios). But perhaps the nearest the research comes to establishing causality are two studies—one of companies that hedge FX exposures and another of airlines' hedging of fuel costs—that show that, in industries where hedging with derivatives is common, companies that hedge outperform companies that don't.