Devonian of Maryland. 1

The University of Maryland College Park, Maryland

Question 2 (25 points) Consider the problem of minimizing the cost of producing some output level Y . The firm uses two inputs, labor (L) and capital (K), which can be combined to produce goods according to the production function f (L,K) = LαK1−α, α ∈ (0, 1). The effective amount of labor that is used in production is determined as L = l× t, where l is the number of workers hired, and t is the...

Glyptolepis from the Middle Devonian of Scotland

The Rhipidistia (Osteichthyes, Crossopterygii) comprise three superfamilies of Paleozoic fossil fishes, the Holoptychoidea, Osteolepoidea and Rhizodontoidea. Of these the members of the Holoptychoidea (families Holoptychidae and Porolepidae) are by far the least well known, and consequently there exists a considerable gap in our knowledge of the evolution of the Rhipidistia as a whole. The aim ...

Microanatomy of Early Devonian book lungs.

The book lungs of an exceptionally preserved fossil arachnid (Trigonotarbida) from the Early Devonian (approx. 410 Myr ago) Rhynie cherts of Scotland were studied using a non-destructive imaging technique. Our three-dimensional modelling of fine structures, based on assembling successive images made at different focal planes through the translucent chert matrix, revealed for the first time foss...

Melanie Killen (University of Maryland)

Developmental research on social and moral reasoning about exclusion has utilized a social-domain theory, in contrast to a global stage theory, to investigate children’s evaluations of genderand race-based peer exclusion. The social-domain model postulates that moral, social-conventional, and personal reasoning coexist in children’s evaluations of inclusion and exclusion, and that the priority ...

Maryland Cardiovascular Disease Surveillance