M. Vellend ([email protected]), C. D. Brown and I. H. Myers-Smith, Dépt de Biologie, Univ. de Sherbrooke, Sherbrooke, QC, J1K 2R1, Canada. – D. S. Srivastava, K. M. Anderson, J. E. Jankowski, E. J. Kleynhans, N. J. B. Kraft, A. D. Letaw, A. A. M. Macdonald, J. E. Maclean, Dept of Zoology and Biodiversity Research Centre, Univ. of British Columbia, Vancouver, BC, V6T 1Z4, Canada. – A. ...

Outsourcing relationship quality (ORQ) has shown to be an important construct in previous research on outsourcing effectiveness. But, while there are various works that have conceptualized and operationalized ORQ as a rich and multi-dimensional construct, other studies which consider ORQ as (usually mediating) component of their theoretical models make hardly use of those works but often use le...

Images tagged with human-provided keywords are a valuable source of data, and are increasingly available thanks to community photo sharing sites such as Flickr and various labeling projects in the vision community. Often the keywords reflect the objects and events of significance and can thus be exploited as a loose form of labels and context. Researchers have explored a variety ways to leverag...

This investigation examined the effects of providing choices among homework assignments on motivation and subsequent academic performance. Students were randomly assigned within classrooms either to receive a choice of homework options or to be assigned an option for all homework in one instructional unit. Conditions were reversed for a second instructional unit. Results revealed that when stud...

Much of the work on species coexistence has focused on the presence or absence of single mechanisms. Most theoretical frameworks, however, do not allow one to measure the strength of coexistence mechanisms, and so it has been difficult to determine the relative importance of each mechanism when multiple mechanisms are present. We present a model inspired by the California red scale system, in w...

In this study production, reproduction, population, management and economic parameters resulted from recording of 7 flocks with size 57 to 400 and 721 heads of camels in a cycle of reproduction, during three years from 2011 to 2013 were used to find out of the economic values of important traits in one hump camel in desert areas rearing system. The economic traits that appeared in profit equati...

Implementation and maintenance of interorganizational systems (IOS) require investments by all the participating firms. Compared with intraorganizational systems, however, there are additional uncertainties and risks. This is because the benefits of IOS investment depend not only on a firm’s own decisions, but also on those of its business partners. Without appropriate levels of investment by a...

We identify the agricultural inputs that drove the growth in global Background and regional crop yields from 1975 to the mid-2000s. : We compare Methods and contrast the inputs that drove yield change as identified by econometrically estimated yield functions and decision trees that use yield change as the class attribute. : We find that improvements in agricultural science and Results managem...

Relative importance is a topic that has seen a lot of interest in recent years, particularly in applied work. The R package relaimpo implements six different metrics for assessing relative importance of regressors in the linear model, two of which are recommended averaging over orderings of regressors and a newly proposed metric (Feldman 2005) called pmvd. Apart from delivering the metrics them...

Known mutagens and carcinogens in the diet were compiled and the risk of cancer was estimated on the basis of average exposure levels in Switzerland and carcinogenic potencies from rodent bioassays. The analysis showed that, except for alcohol, the sum of all known dietary carcinogens could only explain a few percent of the cancer deaths attributed by epidemiologists to dietary factors. The dis...