Freckled Duck

Freckled Instantons in Two and Four Dimensions

Field theory with instantons can be partially regularized by adding degrees of freedom at some scale. These extra degrees of freedom lead to the appearence of the new topological defects. These defects which we call freckles have some characteristic size depending on the scale at which the extra degrees of freedom revive. The examples of two dimensional sigma model, four dimensional gauge theor...

First Record of Freckled Madtom (Noturus nocturnus) in Iowa

Behavior of the Australian Musk Duck and Blue-Billed Duck

"If it looks like a duck, walks like a duck, and quacks like a duck...it must be a duck": anticoagulation in stroke patients with suspected atrial fibrillation.

Duck Virus Enteritis

Identification of the agent: The virus may be isolated from the liver, spleen and kidneys of birds dying from this infection. Virus may be recovered by infecting susceptible ducklings, in which the disease can be reproduced; by inoculating embryonated Muscovy duck eggs on the chorioallantoic membrane; or by inoculating cell cultures of duck embryo or Muscovy duck embryo origin. The identity of ...