Some Necessary Additional Points

Neurogenic Inflammation: Additional Points

William Meggs's recent article, "Neuro-genic Inflammation and Sensitivity to Environmental chemicals" (EHP 101:234-238), provides a useful introduction to a rapidly growing area of knowledge in physiology and posits a number of interesting hypotheses regarding the health effects of airborne chemicals. Some specific technical points, however, merit comment. Meggs describes the common chemical se...

Are the additional grafts necessary?

The goals of surgery for spinal deformity are to correct or improve the deformity to get a stable, balanced and fused spine. The long-term success of any procedure for scoliosis depends on a solid arthrodesis. Getting fusion of the instrumented segment with the aid of copious autogenous iliac graft has been the most important goal of treatment. However, harvesting copious graft from teenage ili...

SOME POINTS ON CASIMIR FORCES

Casimir forces of massive ferrnionic Dirac fields are calculated for parallel plates geometry in spatial space with dimension d and imposing bag model boundary conditions. It is shown that in the range of ma>>l where m is mass of fields quanta and a is the separation distance of the plates, it is equal to massive bosonic fields Casimir force for each degree of freedom. We argue this equalit...

Some Assembly Necessary

Noncontingent Reinforcement: Some Additional Comments

I agree with Poling and Normand’s (1999) view that noncontingent reinforcement (NCR) is an incorrect description of time-based procedures that reduce behavior rates. I also agree that schedule descriptors, such as fixedtime attention or fixed-time escape, are more accurate. Since the publication of Vollmer, Iwata, Zarcone, Smith, and Mazaleski (1993), I have received numerous comments about ter...