Floods and hydroinformatics: new challenges

2007 ◽  
pp. 33-36
Author(s):  
David Fortune
Keyword(s):  
Author(s):  
Joachim Frank

Compared with images of negatively stained single particle specimens, those obtained by cryo-electron microscopy have the following new features: (a) higher “signal” variability due to a higher variability of particle orientation; (b) reduced signal/noise ratio (S/N); (c) virtual absence of low-spatial-frequency information related to elastic scattering, due to the properties of the phase contrast transfer function (PCTF); and (d) reduced resolution due to the efforts of the microscopist to boost the PCTF at low spatial frequencies, in his attempt to obtain recognizable particle images.


2005 ◽  
Vol 38 (17) ◽  
pp. 80
Author(s):  
NELLIE BRISTOL

2012 ◽  
Author(s):  
Maggie Campbell ◽  
Katherine Lacasse ◽  
Lucas Mazur ◽  
Rashmi Nair

1995 ◽  
Vol 34 (01/02) ◽  
pp. 131-139 ◽  
Author(s):  
M. A. Musen ◽  
J. van der Lei

Abstract:The developers of reviewing systems that rely on computer-based patient-record systems as a source of data need to model reviewing knowledge and medical knowledge. We simulate how the same medical knowledge could be entered in four different systems: CARE, the Arden syntax, Essential-attending and HyperCritic. We subsequently analyze how the original knowledge is represented in the symbols or syntax used by these systems. We conclude that these systems provide different alternatives in dealing with the vocabulary provided by the computer-based patient records. In addition, the use of computer-based patient records for review poses new challenges for the content of that record: to facilitate review, the reasoning of the physician needs to be captured in addition to the actions of the physician.


Sign in / Sign up

Export Citation Format

Share Document