242.
Self-Similar Solutions of a Fast Diffusion Equation That Do Not Conserve Mass - Mark A. Peletier; Mark A. Peletier; Hongfei Zhang; Hongfei Zhang
We consider self-similar solutions of the fast diffusion equation u t = r \Delta (u \Gamman ru) in (0; 1) \Theta R N , for N 3 and 2 N ! n ! 1, of the form u(x; t) = (T \Gamma t) ff f \Gamma jxj (T \Gamma t) \Gammafi \Delta : Because mass conservation does not hold for these values of n, this results in a nonlinear eigenvalue problem for f and ff. We employ phase plane techniques to prove existence and uniqueness of solutions (f; ff), and we investigate their behaviour when n " 1 and when...
243.
Resistance training conserves fat-free mass and resting energy expenditure following weight loss - Hunter, Gary R.; Byrne, Nuala M.; Sirikul, Bovorn; Fernández, José R.; Zuckerman, Paul A.; Darnell, Betty E.; Gower, Barbara A.
Objective: To determine what effect diet-induced 12 kg weight loss in combination with exercise training has on body composition and resting energy expenditure (REE) in premenopausal African-American (AA) and European-American (EA) women.--- Methods and Procedures: This study was a longitudinal, randomized weight loss clinical intervention, with either aerobic (AT), resistance (RT), or no exercise training (NT). Forty-eight AA and forty-six EA premenopausal overweight (BMI between 27 and 30) women underwent weight loss to a BMI <25. Body composition (densitometry), REE (indirect calorimetry), maximal oxygen uptake (VO2max), and muscular strength (isometric elbow flexion) were evaluated when subjects were in energy balance.---...
247.
Can the restrictive harvest period policy conserve mopane worms in southern Africa? A bioeconomic modelling approach - AKPALU, WISDOM; MUCHAPONDWA, EDWIN; ZIKHALI, PRECIOUS
The mopane worm, which is the caterpillar form of the Saturnid moth Imbrasia belina Westwood, is a vital source of protein in southern African countries. The worms live and graze on mopane trees, which have alternative uses. With increasing commercialization of the worm, its management, which was hitherto organized as a common property resource, has been degraded to almost open access. This paper uses a bioeconomic modelling approach to show that for some optimal allocation of the mopane forest stock, the restrictive harvest period policy advocated by community leaders may not lead to sustainable harvesting of the worm.
250.
Do Open-Cycle Hatcheries Relying on Tourism Conserve Sea Turtles? Sri Lankan Developments and Economic–Ecological Considerations - Tisdell, Clem; Wilson, Clevo
By combining economic analysis of markets with ecological parameters, this article considers the role that tourism-based sea turtle hatcheries (of an open-cycle type) can play in conserving populations of sea turtles. Background is provided on the nature and development of such hatcheries in Sri Lanka. The modeling facilitates the assessment of the impacts of turtle hatcheries on the conservation of sea turtles and enables the economic and ecological consequences of tourism, based on such hatcheries, to be better appreciated. The results demonstrate that sea turtle hatcheries serving tourists can make a positive contribution to sea turtle conservation, but that their...
251.
Resistance training conserves fat-free mass and resting energy expenditure following weight loss - Hunter, Gary R.; Byrne, Nuala M.; Sirikul, Bovorn; Fernández, José R.; Zuckerman, Paul A.; Darnell, Betty E.; Gower, Barbara A.
Objective: To determine what effect diet-induced 12 kg weight loss in combination with exercise training has on body composition and resting energy expenditure (REE) in premenopausal African-American (AA) and European-American (EA) women.--- Methods and Procedures: This study was a longitudinal, randomized weight loss clinical intervention, with either aerobic (AT), resistance (RT), or no exercise training (NT). Forty-eight AA and forty-six EA premenopausal overweight (BMI between 27 and 30) women underwent weight loss to a BMI <25. Body composition (densitometry), REE (indirect calorimetry), maximal oxygen uptake (VO2max), and muscular strength (isometric elbow flexion) were evaluated when subjects were in energy balance.---...
241.
