abstract improving nitrogen use efficiency (nue) is an important objective of the agroecosystem management. a field experiment was conducted to study the effect of different competition patterns on nitrogen balance in the wheat agroecosystem. experimental design was split–plot based on randomized complete blocks with four replications. the main plots consisted of different nitrogen rates (i.e. ...

Waiting time and system time (waiting plus service time) data, adjusted for idle times when necessary, are used for estimating the parameters in GI/G/1 queues. The sampling plans presented use incomplete information on the differences between service and inter-arrival times rather than full information on service and inter-arrival times. A variation of the EM algorithm is proposed to derive par...

BACKGROUND AND PURPOSE Diffusion tensor MR imaging has the potential to improve our ability to monitor several neurologic conditions. As a preliminary step to the assessment of the role of diffusion tensor MR imaging in the context of longitudinal and multicenter studies, we evaluated the effect of sequence-, imaging unit-, and imaging-reimaging-induced variations on diffusion tensor MR imaging...

This paper investigates the relationship between stylistic context of utterance production and language user’s regional background as influencing factors in one syntactic alternation, i.e., variation double object prepositional dative construction. To that end, this chapter zooms on (1) competition community regarding choice, (2) cross-regional inter-register variation, (3) register-specific co...

In this paper we investigate the network factors that may affect the user perceived end-to-end delay jitter. In particular, we identify the following three major factors: per hop queueing delay variations along an Internet path; intra-domain multi-path routing; and inter-domain route (i.e., AS path) alterations. By studying traceroute data collected on Internet paths, we find that 1) larger que...

We applied multivariate analyses to an array of body measures of alpine newt specimens derived from 11 local populations in Greece to describe, analyse and detect patterns and putative causes of within-population and among-population morphometric variation. The observed morphometric variation was partitioned into several independently varying aspects of the external phenotype, frequently follow...

The test most commonly used to detect sperm antibodies is the mixed antiglobulin reaction (MAR), standardized by the World Health Organization. The indirect MAR test detects soluble sperm antibodies in seminal plasma by using healthy donor spermatozoa as antigen. In this study we systematically investigated the influence of donor spermatozoa and the source of sperm antibodies upon the results o...

Variations in mitochondrial DNA characters were used to characterize two morphologically similar and sympatric species of Neotropical terrestrial rodents of the genus Proechimys (Mammalia: Echimyidae). We sequenced both cytochrome b (1140pb) and part of the control region (445pb) from four individuals of P. cuvieri and five of P. cayennensis from French Guiana, which allowed us to depict intra-...