the effect of nitrogen (n) levels on n uptake by high weed densities at early growth stages of corn (zea mays l., cv. double cross 370) was investigated for two years (2008-2009) at the agricultural research station of shiraz university. the experiment was arranged in a split-plot arrangement in the randomized complete blocks design with three replications. two levels of weed control (weedy and...

This paper shows how the identiication step in several identiication for control schemes can be performed in a uniied and simpliied manner. We utilize a particularly simple indirect method for closed-loop identiica-tion and show how the x noise model/preelter should be chosen in order to match the identiication and control criteria.

OBJECTIVES Indirect comparison methods have been increasingly used to assess the effectiveness of different interventions comparatively. This study evaluated a Trial Similarity and Evidence Consistency Assessment (TSECA) framework for assessing key assumptions underlying the validity of indirect comparisons. STUDY DESIGN AND SETTING We applied the TSECA framework to 94 Cochrane Systematic Rev...

abstract turf grass as a main grown cover plant has a unique place in green space planning. in order to study the effect of hydrogel and paclobutrazol on water requirement of turfgrasse (lolium perenne l. barbal) a factorial experiment based on a brcd with 3 replication was conducted in the summer of 2010 in mashhad. the factors under study were 4 levels of hydrogel (0, 3, 6, 9 gr/kg soil), 3 l...

Standardization is a method used to compare observed and expected rates of a given disease/outcome by removing the influence of factors that may confound the comparison. There are two major standardization methods: one is used when the 'standard' is the structure of a population (direct method) and the other when the 'standard' is a set of specific event rates (indirect method). The direct stan...

The construction of the American Psychiatric Association's diagnostic manual has been guided primarily by concerns of construct validity rather than of clinical utility, despite claims by its authors that the highest priority has in fact been clinical utility. The purpose of this article was to further articulate the concept and importance of utility when constructing and evaluating a diagnosti...

Implant surgery complications are frequent occurrences in dental practice and knowledge in the management of these cases is essential. The aim of this review was to highlight the challenges of treatment plan-related, anatomy-related, and procedure-related surgical complications as well as to discuss the etiology, management and treatment options to achieve a satisfactory treatment outcome.