We address the question of the existence of magnetic domains in a recent scenario for the creation of primordial magnetic fields. We write down the magnetohydrodynamic equation in an expanding universe in the infinite conductivity limit and discuss its solution. No domains are found. [email protected]; [email protected] We have recently presented a scenario for the creation of a primord...

Historical changes in land use on coastal watersheds have increased rates of land-derived nitrogen loading to estuaries and altered their biogeochemistry and food webs. We used information on human populations and land uses within the watershed of Waquoit Bay, Cape Cod, Massachusetts, U.S.A., to model how nitrogen loads derived from atmospheric deposition, fertilizer use, and wastewater disposa...

In recent years, there has been widespread concern about the ecological and genetic effects of genetically modified organisms. In salmon and other fishes, transgenic growth hormone genes have been shown to have large effects on size and various traits related to fitness. In this paper, I have shown by using a deterministic model that if such a transgene has a male-mating advantage and a general...

A method is developed to account for effects of animal movement in response to sighting platforms in line transect density estimates using data on animal orientation. Models of expected distributions of animal orientation show that presence of responsive movement is determined by the ratio of animal sightings with angles of orientation in the third quadrant relative to the first quadrant. The d...

We study a BPS configuration in which four strings (of different type) meet at a point in N = 2, D = 8 supergravity, i.e., the low energy effective theory of T -compactified type II string theory. We demonstrate that the charge conservation of the four strings implies the vanishing of the net force (due to the tensions of various strings) at the junction and vice versa, using the tension formul...

To evaluate the metabolic differences between Atlantic salmon (Salmo salar) parr and smolts and the effect of rearing environment, we examined metabolic enzyme activity in white muscle, liver, and heart in streamand hatcheryreared juveniles. Spring increases in gill Na+,K+-ATPase (3.5-fold) and cardiosomatic index (37–69%) and decreases in condition factor (~17%) occurred in smolts, but not in ...

We treat in this paper non-linear sigma models such as CP -model, QP -model and etc, in 1 + 2 dimensions. For submodels of such ones we definitely construct an infinite number of nontrivial conserved currents. Our result is a generalization of that of authors (Alvarez, Ferreira and Guillen). 0 Introduction Integrable models in (1 + 1)-dimensions are good toy models to understand (1+3)-dimension...

This paper presents a specifically database-inspired approach (called DOGMA) for engineering formal ontologies, implemented as shared resources used to express agreed formal semantics for a real world domain. Our methodology aims to addresses several related issues, such as (a) the scalability of building and sharing ontologies; (b) the maximization of knowledge reusability; (c) the design and ...

A rare mutant allele (cud-n l ) of the cad gene in loblolly pine (Pinus I I I C ~ I L I L.) causes a deticiency in the production of cinnamyl alcohol dehydrogenase (CAD). Effects associated with this allele were examined by comparing wood density and growth traits of cad-nl heterozygous trees with those of wild-type trees in n 10-year-old openpollinated family trial growing under two levels of ...