Scarring of Florida’s seagrasses: assessment and management options

Management programs that address scarring of seagrasses should be based on an approach that involves (1) education, (2) channel marking, (3) increased enforcement, and (4) limited-motoring zones. Aerial monitoring and photography of the managed area are essential in evaluating the effectiveness of a program. Management programs that use this multifaceted approach have been instituted by a few local governments and at several state parks. Initial results of the programs indicate that in some areas seagrass scarring has been reduced but that in other areas emphasis may need to be increased on one or more of the components of the four-point approach. A statewide management plan is needed to address the most egregious scarring over large areas that may be difficult to regulate at the local-government level

Complex line bundles in relativity

This is the published version, also available here: http://dx.doi.org/10.1063/1.523750.We exhibit the complexified spin and conformally weighted functions as sections of holomorphic line bundles over P 1(C) ×P 1(C). As an example of a nontrivial bundle, we discuss the complex null cone in some detail

Effect of Resistance Training on VCAM-1 and Cortisol in HIV+ Men with Chemical Dependence

Effect of resistance training on VCAM-1 and Cortisol in HIV+ men with chemical dependence Curtis, John H., Vingren, Jakob L., Hill, David W., The Applied Physiology Laboratory, The University of North Texas, Denton, TX Resistance training can reduce the effects of inflammatory diseases and contribute to skeletal muscle repair and regeneration. Cortisol functions to reduce inflammation in the body however, it can impair the immune system. Elevated levels of Vascular Cell Adhesion Molecule 1 (VCAM-1) are associated with an increased risk of cardiovascular disease. Chemical dependency is also associated with immune impairment. Purpose: The purpose of this study was to look at the impact of resistance training on the level of cortisol and VCAM-1 as an inflammatory response to resistance training. Methods: Sixteen HIV+ men (Age: 41.5 ± 10.9, Height: 180.4 ± 9.1 cm, Weight: 89.2 ± 20.7 kg) enrolled in an in-patient chemical dependence rehabilitation program were recruited and assigned to one of two groups using randomization: supervised resistance training 3 times per week (Exercise) or no exercise training (Control) for six weeks. Before and after the 6-week period, a resting and fasted blood sample was obtained and analyzed for cortisol and VCAM-1 concentrations. Results: Resting levels of VCAM-1 were statistically unchanged in both the Control group (6.05 ± 4.5 vs. 6.13 ± 4.5) and in the Exercise group (7.05 ± 3.4 vs. 7.6 ± 3.6). Levels of Cortisol were also statistically unchanged in both the Control group (26.33 ± 9.3 vs. 26.08 ± 7.9) and the Exercise group (21.84 ± 3.5 vs. 22.37 ±4.8). Conclusion: A six week resistance training program might not be long enough to illicit the benefits of lower Cortisol levels and an increase in VCAM-1 levels in this given population

Increased Uniformity by Planting Clones Will Likely Have a Minimal Effect on Inventory Costs

When conducting inventories, reducing variability among tree diameters, heights, and ultimately volumes or biomass, can reduce the number of points/plots needed to obtain a desired level of precision. We present a simple analysis examining the potential reduction in discounted inventory costs when stand variability is decreased (via improved genetics and intensive management on a uniform soil). Sampling time might be reduced if the coefficient of variation in point volume/biomass estimates is reduced to 10% (versus 25% for genetically diverse stands). However, if this level of variability could be achieved (and depending on the desired probability and allowable percent error) discounted costs might be only reduced by $0.50 per acre for a single inventory (when a 15$20 to $30 per acre. On some very uniform sites, stands with low variability may only need one inventory plot per 25 acres. Although clones (in theory) might reduce variability, microsite conditions within a plantation will always produce variability among plots/points