Supercharged topping rocket propellant feed system

A rocket propellant feed system utilizing a bleed turbopump to supercharge a topping turbopump is presented. The bleed turbopump is of a low pressure type to meet the cavitation requirements imposed by the propellant storage tanks. The topping turbopump is of a high pressure type and develops 60 to 70 percent of the pressure rise in the propellant

Physician Acceptance of New Medicare Patients Stabilizes in 2004-05

Measures access to physicians by Medicare beneficiaries in recent years, in relation to the decline in the number of U.S. physicians accepting patients during the late 1990s. Explores factors that determine why a physician accepts new patients

Capacity Bounded Grammars and Petri Nets

A capacity bounded grammar is a grammar whose derivations are restricted by assigning a bound to the number of every nonterminal symbol in the sentential forms. In the paper the generative power and closure properties of capacity bounded grammars and their Petri net controlled counterparts are investigated

A phenomenological study of italian students’ responses to professional dilemmas. A cross-cultural comparison

Phenomenon: Medical professionalism is a complex construct, based in social and cultural influences, yet little research has been done to show how culture influences the behaviors and attitudes of medical students. We presented Italian students with the same professional dilemmas used in a previous Canadian and Taiwanese cross-cultural study to look for similarities and differences and detect elements of Italian culture that influenced how students responded to dilemmas. The aim was to provide medical educators with some insights into students’ behavioral strategies and feelings when faced with a professional dilemma. Approach: Using Giorgi’s method, we performed a phenomenological analysis of 15 interviews of Italian medical students who responded to standardized video scenarios representing professional dilemmas. These videos were used in Canada and Taiwan and were translated into Italian. All students were from the same degree course, at Year 6, and were recruited on a voluntary basis at the beginning of the Internal Medicine course. Interview transcripts were anonymized before analysis. Findings: Scenarios were perceived as realistic and easy to envision in Italy. Four themes emerged: establishing priority among principles, using tactics to escape the dilemma, defending the self, and defending the relationships. When compared with previous studies, we noted that Italian students did not mention the principles of reporting inappropriate behavior, seeking excellence, or following senior trainees’ advice. Insights: This is the first cross-cultural study of professionalism that involves a Mediterranean country and the observed differences could be interpreted as expressions of Italian cultural traits: distrust toward authority and a cooperative rather than competitive attitude. These findings have practical implications for educators to design and run curricula of professionalism with culturally appropriate topics. They highlight the need for more cross-cultural research

Ultimate periodicity of b-recognisable sets : a quasilinear procedure

It is decidable if a set of numbers, whose representation in a base b is a regular language, is ultimately periodic. This was established by Honkala in 1986. We give here a structural description of minimal automata that accept an ultimately periodic set of numbers. We then show that it can verified in linear time if a given minimal automaton meets this description. This thus yields a O(n log(n)) procedure for deciding whether a general deterministic automaton accepts an ultimately periodic set of numbers.Comment: presented at DLT 201