منابع مشابه
Web Piston: Choosing a New Strategy
Web Piston is a successful enterprise that provides its small business and individual clients with automated web design and web hosting services. Owing to the rapidly changing competitive environment, however, the company’s founder, Ricardo Lasa, feels that a change in strategy is necessary. The case describes the competitive environment for web hosting and outlines four alternative strategies:...
متن کاملA case of accidental hypotension caused by drug leakage through the rubber piston in a prefilled inovan injection 0.3% syringe.
an axial histologic cross-section (fig. 1) that evidently shows several layers surrounding the nerve fascicles, including an outer layer that cannot always be clearly separated from the adjacent epineurial layers. Both layers are very thin ( 0.2 mm). Thus, by intentionally breaching this layer, we believe that both layers are punctured, and the needle tip is inside the nerve, which we referred ...
متن کاملThe syringe gap: an assessment of sterile syringe need and acquisition among syringe exchange program participants in New York City
BACKGROUND Programmatic data from New York City syringe exchange programs suggest that many clients visit the programs infrequently and take few syringes per transaction, while separate survey data from individuals using these programs indicate that frequent injecting - at least daily - is common. Together, these data suggest a possible "syringe gap" between the number of injections performed b...
متن کاملReducing Piston Mass in a Free Piston Engine Compressor by Exploiting the Inertance of a Liquid Piston
A dynamic model of a free liquid piston that exploits piston geometry to produce a high inertance was developed for use in a free piston engine compressor. It is shown that for the size scale targeted, advantageous piston dynamics can be achieved with a reduced piston mass compared to a rigid piston design. It is also shown that the viscous losses associated with the liquid piston are negligibl...
متن کاملCasimir force on a piston
We consider a massless scalar field obeying Dirichlet boundary conditions on the walls of a two-dimensional L×b rectangular box, divided by a movable partition (piston) into two boxes of dimensions a × b and (L − a) × b. We compute the Casimir force on the piston in the limit L → ∞. Regardless the value of a/b, the piston is attracted to the nearest end of the box. Asymptotic expressions for th...
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ژورنال
عنوان ژورنال: The Boston Medical and Surgical Journal
سال: 1877
ISSN: 0096-6762,1533-4406
DOI: 10.1056/nejm187704050961403