Developed by Dr. T.P. Wright in 1936, learning curves projected World War II production capacities. Afterward they became standard in the aircraft industry. In defense contracting, an expected learning rate is often factored into negotiations. However, learning curves seemingly made little impact on manufacturing progress in aviation or elsewhere. The history of the learning curve illustrates o...

BACKGROUND Complete cast crowns are good alternatives and have best longevity for the restoration of damaged posterior teeth. Occasionally, a crown with clinically acceptable margins, preparation design, and occlusion becomes loose. Providers often debate whether such a crown can be successfully recemented with any degree of confidence that it will not be dislodged under normal masticatory func...

Studies about the universe are exciting for children in elementary and junior high schools. They approach such work with energy and curiosity but they also hold naïve ideas that may be difficult to dislodge. Schools now can obtain access to scientific-grade telescopes for educational purposes via the Internet. Using students’ questions as a basis for projects, teachers can provide first-hand sc...

Calcium plays an important regulatory role in olfactory signal transduction. Many investigations into the regulation of the olfactory signaling pathway have been performed using fractions enriched in ciliary membranes from olfactory sensory neurons. The traditional method of preparing ciliary fractions uses high calcium concentrations, thought to dislodge cilia from the dendritic knobs of the o...

Slurs are among the most rhetorically powerful and insidious expressions in a language. One key reason for this, I will argue, is that they present contents from a certain perspective, which is difficult to dislodge despite the fact that it is precisely what a nonbigoted hearer most wants to resist. To get a feel for the phenomenon, observe that on the most natural readings of the following sen...

dilated. Any heroic1 attempt to dislodge the electrode would have resulted in evulsion of the tricuspid leaflet or valve. Fibrous adhesions with the tricuspid ring have I~een previously reported.' It is suggested that great care be taken under similar situations and that leaving the electrode in place may be a better part of valor. Sylcicl R. Pettersotz, h4.D.; Jnt~g B . Singh, h1.D.; Grrillerm...

Epiphytic algae grow on other algae rather than hard substrata, perhaps circumventing competition for space in marine ecosystems. Aquatic epiphytes are widely thought to negatively affect host fitness; it is also possible that epiphytes benefit from associating with hosts. This study explored the biomechanical costs and benefits of the epiphytic association between the intertidal brown algal ep...

Objective The study evaluated the influence of abutment design on the retention of implant-cemented metal copings. Material and methods Two abutments of the same system with the same indications, height and the total occlusal convergence, but of different designs were evaluated. Ten RN synOcta abutments (Straumann, Waltham, MA) and ten RN titanium solid abutments (Straumann, Waltham, MA) were t...

OBJECTIVE This study aimed to identify factors related to outcomes of the pharyngeal foreign bodies in children and to improve the management protocol of this disease. METHODS The medical records of 131 children with pharyngeal foreign bodies hospitalized in the hospital were retrospectively reviewed. RESULTS Significant differences were observed between the two groups (dislodgement and rem...