The use of by-plot coefficient of variation (CV) has not been evaluated in precision agricultural work. This study evaluated the relationship between CVs determined from normalized-difference vegetative index (NDVI) sensor readings, plant population, and sensing direction on NDVI values. Randomly selected plots, measuring 1 m2 (2003) and 3 m2 (2004), were established for this study. Plots in 20...

OBJECTIVES Salivary analysis is a noninvasive alternative that may be more acceptable to patients, especially children. As such, it has the potential for incorporation into comprehensive, dynamic investigations of metabolic dysfunctions - a significant advancement over a single time point serum analysis. In this study, we wanted to determine if the serum cortisol assay on our routine immunoassa...

Near-infrared spectroscopy (NIRS) is a noninvasive technique evaluating microvascular function. The aim of this study was to assess the reproducibility of NIRS parameters during reactive hyperemia induced by a 5 min brachial artery occlusion. Twenty-four healthy young males (mean 34 ± 8 years old) had two microvascular function evaluations by NIRS over a 7 to 30-day period (mean 16 ± 10 days). ...

IMPORTANCE Endothelial morphometric measures have potential value in predicting graft failure after penetrating keratoplasty. OBJECTIVE To determine whether preoperative and/or postoperative central morphometric measures (endothelial cell density [ECD], coefficient of variation [CV], and percentage of hexagonality [HEX]) and their postoperative changes are predictive of graft failure caused b...

BACKGROUND Many patients presenting to the emergency department (ED) for assessment of possible acute coronary syndrome (ACS) have low cardiac troponin concentrations that change very little on repeat blood draw. It is unclear if a lack of change in cardiac troponin concentration can be used to identify acutely presenting patients at low risk of ACS. METHODS We used the hs-cTnI assay from Abb...

We investigate if consequential angular momentum losses (CAML) or an intrinsic deformation of the donor star in CVs could increase the CV bounce period from the canonical theoretical value ∼ 65 min to the observed value P min ≈ 77 min, and if a variation of these effects in a CV population could wash out the theoretically predicted accumulation of systems near the minimum period (the period spi...

Many measures, particularly the coefficient of variation (CV) and Hoover concentration index (CI), have been used in the study of regional inequality. However, opposite results are often obtained from different quantitative measures which are supposedly showing the same pattern of regional inequality. This paper employs Jiangsu province in P.R. China as a case study to explain how two measures,...

Postprandial changes in plasma total cholesterol (TC) are minimal and there is essentially no difference between fasting vs random TC concentrations, as reflected in the small diurnal coefficient of variation (CV) for TC of 2.5%. Similarly, a cholesterol-rich meal within the last 24 hours lacked an impact on plasma TC. Thus, random specimens are acceptable in blood cholesterol screening. The in...

BACKGROUND This study aims to examine the association between visit-to-visit glucose variability, which was measured by coefficient of variation (CV) of fasting plasma glucose (FPG) and hemoglobin A1c (HbA1c), and risk of chronic obstructive pulmonary disease (COPD) in a large number of patients with type 2 diabetes with an average follow-up of 7.58 years. METHODS We conducted a retrospective...

PURPOSE To define the optimal cardiac short-axis cine acquisition protocol for the assessment of the left and rightventricular functions. MATERIALS AND METHODS 20 volunteers were recruited and breath-hold CINE images were acquired on a Siemens Prisma 3T MRI. Four short-axis acquisition planes were defined from the 4-chamber view. AV Junctions: short-axis slices parallel to the plane that cuts...