13,634 research outputs found
Recommended from our members
The Ultimate Poker Face: A Case Report of Facial Diplegia, a Guillain-Barré Variant
Introduction: Facial diplegia, a rare variant of Guillain-Barré syndrome (GBS), is a challenging diagnosis to make in the emergency department due to its resemblance to neurologic Lyme disease.Case report: We present a case of a 27-year-old previously healthy man who presented with bilateral facial paralysis.Discussion: Despite the variance in presentation, the recommended standard of practice for diagnostics (cerebrospinal fluid albumin-cytological dissociation) and disposition (admission for observation, intravenous immunoglobulin, and serial negative inspiratory force) of facial diplegia are the same as for other presentations of GBS.Conclusion: When presented with bilateral facial palsy emergency providers should consider autoimmune, infectious, idiopathic, metabolic, neoplastic, neurologic, and traumatic etiologies in addition to the much more common neurologic Lyme disease
Fisheries Production: Management Institutions, Spatial Choice, and the Quest for Policy Invariance
The fishery-dependent data used to estimate fishing production technologies are shaped by the incentive
structures that influence fishermen’s purposeful choices across their multiple margins of production. Using a
combination of analytical and simulation methods, we demonstrate how market prices and regulatory institutions
influence a dominant short-run margin of production—the deployment of fishing time over space. We
show that institutionally driven spatial selection leads to only a partial exploration of the full production set,
yielding poorly identified estimates of production possibilities outside of the institutionally dependent status
quo. The implication is that many estimated fisheries production functions suffer from a lack of policy invariance
and may yield misleading predictions for even the most short-run of policy evaluation tasks. Our findings
suggest that accurate assessment of the impacts of a policy intervention requires a description of the fishing
production process that is sufficiently structural so as to be invariant to institutional changes.Ye
Recommended from our members
Thiamethoxam impairs honey bee visual learning, alters decision times, and increases abnormal behaviors.
Learning is important for honey bee fitness and the pollination services that they provide. Neonicotinoid pesticides impair learning, fitness, colony health, and pollination, but most studies on how they affect bee learning have focused on olfactory learning. We tested the effects of field realistic doses of 0.8 ng/bee and 1.34 ng/bee of the neonicotinoid pesticide, thiamethoxam (TMX), on bee visual learning. We adapted a T-maze bioassay and classically conditioned bees to associate sugar reward with a simulated flower color (blue or yellow light) in a choice assay. At 1.34 ng/bee, TMX significantly reduced correct choices in the final learning trial as compared to the control treatment. There was no TMX effect in our 1-h memory test. We found stronger effects on decision time and abnormal behaviors. TMX decreased bee decision times, a potential byproduct of induced hyperactivity since bees walked to make choices. Behaviors (falling, trembling, and rapid abnormal movements) were significantly increased by both TMX doses as compared to the control treatment. These results suggest that the effects of neonicotinoids on bee visual learning should be further studied and incorporated into Risk Assessment protocols
Formal Relationships: Introduction and Orientation
In 2009, Demographic Research will be publishing short reports on mathematical relationships in formal demography in a new Special Collection called "Formal Relationships". This first publication outlines the goals and procedures for publications in the collection. The guest editors of the collection are Joshua R. Goldstein and James W. Vaupel.
- …