crop rotation affect on crop nitrogen uptake and nitrogen use efficiency (nue). crop rotations with high nue decrease energy use and increase level of sustainability in agro ecosystems. the objectives of this research were to determine the suitable double cropping system for enhancing nue and evaluate the effects of crop rotation, n fertilizer rate and return of crop residue on nue. this study ...

lean cell operates itself by what is called standard operations. job rotation is known as the standard operation of a lean cell. however, researchers have not studied job rotation to demonstrate the performance of a lean cell. job rotation decisions affect lean cell performance through influencing the manner in which tasks assigned to the selected operators during several rotation periods. this...

BACKGROUND Left ventricular (LV) apical rotation and twist can be estimated noninvasively by speckle-tracking echocardiography (STE). In this study, we tested whether apical rotation is an accurate index of LV contractility. METHODS AND RESULTS We measured LV basal and apical rotation by STE in 11 open-chest anesthetized mongrel dogs under 8 different inotropic stages before and after ligatio...

The cavity perturbation technique is an extremely powerful method for measuring the electrodynamic response of a material in the millimeterand submillimeter spectral range s10 GHz–1 THzd, particularly in the case of high-field/frequency magnetic resonance spectroscopy. However, the application of such techniques within the limited space of a high-field magnet presents significant technical chal...

background: excessive lumbar vertebrae translation and rotation in sagittal plane has been attributed as an associated factor of lumbar segmental instability (lsi) and low back pain (lbp). reduction of these abnormalities improves back pain. the aim of this study was to investigate the effect of core stability exercise on the translation and rotation of lumbar vertebrae in sagittal plane in pat...

Notation We denote the Riemann sphere C U {00} by § 2 and for a e U, we denote by R a :z >e 2nia z the rotation of § 2 of rotation number a with fixed points 0 and 00. On S 2 c W we put the standard induced metric d; and for / > 0 the /-ball with centre x is {ye § 2 :d(x, y) < /}. On subsets of § 2 we put the induced topology. Given A c= § 2 we denote the e-neighbourhood of A by = {ye §*:d(y,A)...

Consider an analytic function f which has a Siegel disk properly contained in the domain of holomorphy. We prove that if the rotation number is of bounded type, then f has a critical point in the boundary of the Siegel disk.

To shed light on intramolecular charge-transfer phenomena in 1,2,3-triazole-linked materials, a series of 1,2,3-triazole-linked push-pull chromophores were prepared and studied experimentally and computationally. Investigated modifications include variation of donor and/or acceptor strength and linker moiety as well as regioisomers. Photophysical characterization of intramolecular charge-transf...

This review covers conformational and configurational assignments in natural product molecules using chiroptical spectroscopy reported over the last 15 years. Special attention is given to vibrational optical activity methods associated with quantum mechanical calculations.