Introduction and Overview of Clinical Computing Systems within a Medical Center

2015 ◽  
pp. 1-9
Author(s):  
Thomas H. Payne
Keyword(s):  
Medical Center ◽  
Computing Systems ◽  
Clinical Computing

Work-Sampling: A Statistical Approach to Evaluation of the Effect of Computers on Work Patterns in Healthcare

1993 ◽  
Vol 32 (02) ◽  
pp. 167-174 ◽  
Author(s):  
D. F. Sittig
Keyword(s):  
Health Care ◽  
Health Care Workers ◽  
Statistical Approach ◽  
Work Patterns ◽  
Computing Systems ◽  
Work Sampling ◽  
Subjective Evaluations ◽  
Time Motion ◽  
Care Workers ◽  
Clinical Computing

Abstract:An increasing number of health-care institutions are in the process of implementing clinical computing systems. The need for an accurate assessment of the clinical, administrative, social, and financial effects of such systems has been recognized. Techniques have been developed to evaluate these effects on the work patterns of health-care workers including: time-motion analysis, subjective evaluations, review of departmental statistics, personal activity records, and work-sampling. This study reviews these techniques, discusses both positive and negative aspects, and presents a step-by-step description of work-sampling.

Artefact in 20Å-Resolution Electron Images of Negatively Stained Twodimensional Membrane Protein Crystals

1982 ◽  
Vol 40 ◽  
pp. 92-93
Author(s):  
Douglas L. Dorset ◽  
Barbara Moss
Keyword(s):  
Electron Scattering ◽  
Cross Correlation ◽  
Transmission Function ◽  
Group Symmetry ◽  
Asymmetric Structure ◽  
Object Model ◽  
Phase Object ◽  
Computing Systems ◽  
Resolution Electron ◽  
Plane Group

A number of computing systems devoted to the averaging of electron images of two-dimensional macromolecular crystalline arrays have facilitated the visualization of negatively-stained biological structures. Either by simulation of optical filtering techniques or, in more refined treatments, by cross-correlation averaging, an idealized representation of the repeating asymmetric structure unit is constructed, eliminating image distortions due to radiation damage, stain irregularities and, in the latter approach, imperfections and distortions in the unit cell repeat. In these analyses it is generally assumed that the electron scattering from the thin negativelystained object is well-approximated by a phase object model. Even when absorption effects are considered (i.e. “amplitude contrast“), the expansion of the transmission function, q(x,y)=exp (iσɸ (x,y)), does not exceed the first (kinematical) term. Furthermore, in reconstruction of electron images, kinematical phases are applied to diffraction amplitudes and obey the constraints of the plane group symmetry.

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