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Strong Positive Effect (strong + positive_effect)
Selected AbstractsLong time investigation of the effect of fouling on the super-heaters in a circulating fluidized biomass boilerINTERNATIONAL JOURNAL OF ENERGY RESEARCH, Issue 13 2006Jan Sandberg Abstract The present investigation involves measurements and theories on the mechanisms of the forming of deposit layers on super-heater tubes in a biomass-fired CFD boiler. The deposit layer thickness and the soot-blowing frequency effect on the super-heaters heat transfer are the main subject of the study that has been conducted over a 3-year period. The measurements show a deposit growth rate on the super-heaters of approximately 4 g m,2 h,1. The distribution of the deposit material varies significantly between the windward and the leeward side of the tubes, with the thickest layers on the windward side. Further down stream of the first super-heater, the fouling problem on the super-heater and re-heater tubes are not so severe. A theoretical model shows that a deposit layer of 20 mm will decrease the heat transfer rate of the first super-heater by nearly 40%. The soot-blowing system shows a strong positive effect on the heat transfer rate of the super-heater a few hours after a soot-blowing sequence has been completed. However in the long run, the varied soot-blowing frequency does not have a significant influence on the deposit layer growth rate. Copyright © 2006 John Wiley & Sons, Ltd. [source] Characterization and role of Helix contactin-related proteins in cultured Helix pomatia neuronsJOURNAL OF NEUROSCIENCE RESEARCH, Issue 2 2009C. Milanese Abstract We report on the structural and functional properties of the Helix contactin-related proteins (HCRPs), a family of closely related glycoproteins previously identified in the nervous system of the land snail Helix pomatia through antibodies against the mouse F3/contactin glycoprotein. We focus on HCRP1 and HCRP2, soluble FNIII domains-containing proteins of 90 and 45 kD bearing consensus motifs for both N- and O-glycosylation. Using the anti-HCRPs serum, we find secreted HCRPs in Helix nervous tissue isotonic extracts and in culture medium conditioned by Helix ganglia. In addition, we demonstrate expression of HCRPs on neuronal soma and on neurite extensions. Functionally, in Helix neurons, the antisense HCRP2 mRNA counteracts neurite elongation, and the recombinant HCRP2 protein exerts a strong positive effect on neurite growth when used as substrate. These data point to HCRPs as novel neurite growth-promoting molecules expressed in invertebrate nervous tissue. © 2008 Wiley-Liss, Inc. [source] Occupational embeddedness and job performanceJOURNAL OF ORGANIZATIONAL BEHAVIOR, Issue 7 2009Thomas W. H. Ng While researchers have recently focused their attention on organizational embeddedness, occupational embeddedness has received little theoretical and empirical attention. Using multisource data on 162 employees in multiple jobs and organizations, we found that occupational embeddedness is positively related to both task performance and creativity and is negatively related to counterproductive work behavior, even after controlling for the effects of organizational embeddedness. In addition, we found that trait affect moderated the relationships of occupational embeddedness to job performance. Occupational embeddedness was more strongly related to counterproductive work behavior when trait negative affect was high, while occupational embeddedness was more strongly related to both citizenship behavior and creativity when trait positive affect was high. Results also indicated that the various components of occupational embeddedness had different effects on job outcomes. Fit had a strong positive effect on core task performance, links had a positive effect on creativity, and sacrifice had a small positive effect on citizenship behavior. The article concludes with a discussion of implications for future research and management practice. Copyright © 2009 John Wiley & Sons, Ltd. [source] Impact of the Community Reinvestment Act on New Business Start-Ups and Economic Growth in Local Markets,JOURNAL OF SMALL BUSINESS MANAGEMENT, Issue 4 2009Nada Kobeissi Economic growth in the United States has historically bypassed many minorities and low-income communities. Some researchers and community advocates assert that the deterioration of these communities is in part caused by financial institutions' redlining and neglect. To rectify the situation, the government introduced the Community Reinvestment Act (CRA) for the purpose of encouraging banks and saving institutions to become more socially responsible and help meet the credit needs of communities in which they are located. The CRA was the government's response to bank lending discrimination. However, when passing the Act, Congress was equally concerned with reversing or at least halting disinvestment from inner-city communities and in turn revitalizing local economies. Many believe that the availability of credit to establish, refinance, and improve small businesses is critical to the well-being of local communities. Therefore, through the provision of small business loans, the CRA could be envisioned as a catalyst toward achieving that goal. Thus the aim of this paper is to investigate potential relationship between banks' CRA lending activities, and new business start-ups and economic growth in local markets. The paper proposes that new start-ups will have spillover effects that will consequently contribute to community development. After controlling for several potential variables that could have an impact on business start-ups and community developments, the study found a strong positive effect. Beside its social and economic implications, the study also considered policy implications associated with the CRA regulation as a welfare improving initiative in low-income communities. It offers ground for certain government intervention in the loan market. [source] The Effect of Clustering on Office Rents: Evidence from the Amsterdam MarketREAL ESTATE ECONOMICS, Issue 2 2009Maarten G.J. Jennen This article examines the rent effects of office clustering in the Amsterdam office market for the period 2000,2005. We isolate the rent effects of location density based on geographic information system (GIS) methodology, while controlling for variations in object characteristics in a cross-sectional hedonic model. While controlling for the age, location and quality of the object, we find a strong positive effect of being located in dense office areas. We find that the vicinity of other office objects is priced into rent levels, regardless of market conditions. This article extends existing literature by examining the influence of clustering outside the United States, during changing economic tides and by application of novel methodology, based on objective clustering schemes, which can be replicated for other geographic areas. [source] Is All Communication Created Equal?: An Investigation into the Effects of Communication Mode on Perceived Information QualityTHE JOURNAL OF PRODUCT INNOVATION MANAGEMENT, Issue 2 2000Elliot Maltz Enhancing communication between functions is crucial to successful product development and management. Previous work in the product innovation management literature has made two implicit assumptions. First, that increasing the frequency of information dissemination from one function to the other always improves the perceived quality of the information received. The second assumption is that all types of interfunctional communication carry equal weight in the decision-making process of the target of that communication. The current study develops a typology of communication modes, which suggests a rationale for why these assumptions may not be true. The empirical findings of the study, based on a survey of 504 nonmarketing managers indicate that the relationship between total communication frequency and perceived information quality (PIQ) is nonlinear. Specifically, the study finds that marketing managers can either communicate too little or too much with nonmarketing managers. If they interact too infrequently, they run the risk of not understanding the way to most effectively communicate market information. If they communicate too much, they may overload the manager with too much information and erode the overall quality of the information sent. In addition, some modes of communication are more effective in improving perceptions of the quality of market information. For instance, regular e-mail sent by marketing managers seems to have no effect on perceived information quality. On the other hand, e-mail sent with supporting documentation can have a strong positive effect on perceived information quality. Impromptu phone calls by marketing have less positive effects than scheduled phone calls. Interestingly, too much of the wrong types of communication actually seem to reduce perceptions of perceived information quality, and consequently the likelihood that market information will be used. The study also suggests that certain kinds of communication are better for manufacturing managers and others more effective in sharing information with R&D managers. For instance, disseminating information through written reports seems to reduce perceived information quality. This is particularly true for R&D managers. On the other hand too many meetings can reduce perceptions of PIQ, particularly on the part of manufacturing managers. Implications for theory and practice are discussed. [source] Impact of landscape spatial pattern on liana communities in tropical rainforests at Los Tuxtlas, MexicoAPPLIED VEGETATION SCIENCE, Issue 3 2009Víctor Arroyo-Rodríguez Abstract Questions: What are the species composition and species and stem densities of liana communities in tropical landscapes of different deforestation levels? Which spatial attributes (forest cover, patch area, shape and isolation) have the strongest influence on liana communities in these landscapes? Location: Forty-five rainforest patches in Los Tuxtlas Biosphere Reserve, Mexico. Methods: In three landscapes with different deforestation levels (HDL=4%; IDL=11%; and LDL=24% of remaining forest cover) liana communities (DBH ,2.5 cm) were characterized in 15 randomly selected patches per landscape (10 50 m × 2 m transects per patch=0.1 ha), and evaluated the effects of patch area, shape and isolation on liana species and stem density (number of species and stems per 0.1 ha). Results: A total of 64 taxa and 24 families were sampled. Species composition differed highly among landscapes, with HDL being the most dissimilar landscape. The response of lianas to landscape spatial pattern differed significantly among landscapes. Proximity to villages had a strong positive effect on species and stem densities in LDL and IDL. There was a sharp decrease in liana stem density in HDL, with four patches (27%) found to be unoccupied by lianas. Conclusions: Fragmentation may have a positive effect on lianas, partly because of edge effects. This positive effect seems to be limited by the proportion of remaining forest cover in the landscape, as the liana communities had collapsed in the most deforested landscape. [source] Government debt spillovers and creditworthiness in a federationCANADIAN JOURNAL OF ECONOMICS, Issue 3 2000Stuart Landon Estimates are presented for the impact of debt accumulation by the central and subcentral governments of a federation on the creditworthiness of other federation member governments. The estimates, calculated using an ordered probit model and Canadian provincial data, indicate that debt accumulation by the central government has reduced the creditworthiness of indebted provincial governments. Interprovincial debt accumulation effects are negative but relatively small, except for the debt of the largest province, which has a strong positive effect on the creditworthiness of the other provinces. These findings may have implications for other federations and associated jurisdictions, such as the European Union. JEL Classification: H63, F36 Les effets de retombée de la dette gouvernementale et la cote de crédit dans une fédération. On calcule l'impact de l'accumulation de la dette par les gouvernements fédéral et sub-fédéraux dans une fédération sur la cote de crédit des autres gouvernements de la fédération. Ces calibrations, à l'aide d'un modèle probit en utilisant les données provinciales canadiennes, montrent que l'accumulation de la dette par le gouvernement central a réduit la cote de crédit des gouvernements provinciaux endettés. Les effets trans-provinciaux de l'accumulation de la dette sont négatifs mais relativement faibles, sauf dans le cas de la province la plus grande, laquelle a un fort effet sur la cote de crédit des autres provinces. Ces résultats peuvent avoir des implications pour d'autres fédérations comme l'Union Européenne. [source] | ||||||||||