Applications of computer graphics to aircraft synthesis

The history of the development of an aircraft configuration synthesis program using interactive computer graphics was described. A system based on time-sharing was compared to two different concepts based on distributed computing

Kidney transplantation. Modern trends in kidney transplantation.

Trends in renal transplantation stem from recognition of the virtues and drawbacks of this kind of treatment and from a better appreciation of the interrelationship between transplantation and dialysis

Closing the design loop on HiMAT (highly maneuverable aircraft technology)

The design methodology used in the HiMAT program and the wind tunnel development activities are discussed. Selected results from the flight test program are presented and the strengths and weaknesses of testing advanced technology vehicles using the RPV concept is examined. The role of simulation on the development of digital flight control systems and in RPV's in particular is emphasized

Micrometre-scale refrigerators

A superconductor with a gap in the density of states or a quantum dot with discrete energy levels is a central building block in realizing an electronic on-chip cooler. They can work as energy filters, allowing only hot quasiparticles to tunnel out from the electrode to be cooled. This principle has been employed experimentally since the early 1990s in investigations and demonstrations of micrometre-scale coolers at sub-kelvin temperatures. In this paper, we review the basic experimental conditions in realizing the coolers and the main practical issues that are known to limit their performance. We give an update of experiments performed on cryogenic micrometre-scale coolers in the past five years

Liver Transplantation for Budd-Chiari Syndrome

Orthotopic liver transplantation was accomplished in a 22-year-old woman dying of the Budd-Chiari syndrome. She is well and has normal liver function 16 months postoperatively. In view of the good early result, it will be appropriate to consider liver replacement for this disease in further well-selected cases. © 1976, American Medical Association. All rights reserved

A Ten Year Follow-up Of a Quality Initiative

Many industries have embraced total quality to achieve a competitive edge in the international marketplace. What is not always understood in the beginning, however, is that implementing a total quality program introduces considerable and often drastic cultural change into the organization. It would be beneficial for any company considering such change to look at a few case studies to anticipate what might happen over time, and avoid unintended consequences. Implementing cultural change within an organization is always challenging, but in the case of quality, it should be a win-win proposition. Unfortunately, outcomes are not always as anticipated. In this real case study, critical mistakes in communication at the planning stage, and failure to foresee potential problem areas almost blocked the change before it could be fully implemented and did reduce its’ eventual effect. Process improvements, however, though modest by original intent, have been well worth the efforts. Lessons learned from this case should be helpful to others considering or planning a major cultural change. For this qualitative research all data were obtained through direct observation in the plant and through confidential conversations with both hourly (union) and salaried (management) personnel at regular intervals over the period of the study. Observations and conversations were recorded in writing after each visit was concluded. Full confidentiality was observed, and no individual was directly identified, nor was any data vetted by union or management. All descriptions are real, but locations and identities have been carefully obscured