3,223 research outputs found
On the characterization of multiaxial data in terms of the strain energy concept
Continuous media theory for characterization of multiaxial mechanical behavior of solid propellants - strain energy concep
Means and method of measuring viscoelastic strain Patent
Photographic method for measuring viscoelastic strain in solid propellants and other material
Miniature stress transducer Patent
Miniature solid state, direction sensitive, stress transducer design with bonded semiconductive piezoresistive element for sensing residual stresse
The Spanish Society for the Study of Pastures: 45 Years Promoting Better Pasture Knowledge and Management
The Spanish Society for the Study of Pastures (SEEP) (http://www.seepastos.es) was founded in 1960 through the initiative of Prof. G. González with the intention of combining efforts and initiatives on pasture studies from many points of view. The Society has the objective of promoting the knowledge and improvement of Spanish pastures, regarding every issue related with pastoral science: typology; ecology and functions of pastoral ecosystems; plant production; feeding value; animal production; economics; sociology and agricultural policy, etc. The term \u27Pasture\u27 is considered in a broad sense to include every plant part, individual or community capable of being used for livestock or wildlife feeding. Since the inception, the Society has enrolled as members university graduates, engineers, farmers, institutes and companies interested in the soil-vegetation-livestock complex
Gametophyte Fitness and Costs of Self-Fertilization in the Giant Kelp Macrocystis Pyrifera
It is widely established that inbreeding can incur heavy costs in a variety of plants, animals, and algae. To date, ten species of kelp have been tested to ascertain the degree to which selfing reduces recruitment of juvenile sporophytes and of those ten species, seven have reduced recruitment when inbred. In this study, I set out to understand whether there is variability in response to self-fertilization among giant kelp gametophytes grown from multiple sites, what those differences are, and how it affects sporophyte recruitment. I collected reproductive sporophylls from fifteen Macrocystis pyrifera individuals in Point Loma, Leo Carrillo State Beach, Carpinteria, and Cayucos, CA. After inducing release of zoospores, I raised gametophytes in both polycultures and monocultures resulting in levels of self-fertilization of 7% and 100% respectively. I recorded the days it took to see the first sporophyte in each dish and a week later counted the number of sporophytes, female gametophytes, and eggs to standardize the data among replicates. I found that, when comparing the density between selfed and outcrossed recruits, there was a reduced number of recruits in selfed than in outcrossed cultures for 3 sites. There was no significant difference in relative cost of self-fertilization among sites. I also found that recruitment was delayed in selfed cultures, but the severity of the delay varied among sites. Eggs existed in an approximately 1:1 ratio to female gametophytes, with the exception of Carpinteria where eggs existed in an approximately 1:2 ratio to female gametophytes. This study demonstrates that Macrocystis pyrifera responds to self-fertilization differently at different sites, that the costs of self-fertilization do not vary among sites, and that self-fertilization results in slower recruitment than outcrossing in giant kelp
Epsilon contaminated priors in testing point null hypothesis: a procedure to determine the prior probability
In this paper the problem of testing a point null hypothesis from the Bayesian perspective and the relation between this and the classical approach is studied. A procedure to determine the mixed prior distribution is introduced and a justification for this construction based on a measure of discrepancy is given. Then, we compare a lower bound for the posterior probability, when the prior is in the class of -contaminated distributions, of the point null hypothesis with the p-value
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