High-performance optical disk mass storage for aerospace imaging systems

1990 ◽  
Author(s):  
Stephen M. Ravner ◽  
Thomas A. Shull
Author(s):  
M. T. Postek ◽  
A. E. Vladar

One of the major advancements applied to scanning electron microscopy (SEM) during the past 10 years has been the development and application of digital imaging technology. Advancements in technology, notably the availability of less expensive, high-density memory chips and the development of high speed analog-to-digital converters, mass storage and high performance central processing units have fostered this revolution. Today, most modern SEM instruments have digital electronics as a standard feature. These instruments, generally have 8 bit or 256 gray levels with, at least, 512 × 512 pixel density operating at TV rate. In addition, current slow-scan commercial frame-grabber cards, directly applicable to the SEM, can have upwards of 12-14 bit lateral resolution permitting image acquisition at 4096 × 4096 resolution or greater. The two major categories of SEM systems to which digital technology have been applied are:In the analog SEM system the scan generator is normally operated in an analog manner and the image is displayed in an analog or "slow scan" mode.


1988 ◽  
Author(s):  
Toshio Niihara ◽  
Shinkichi Horigome ◽  
Ryoichi Sudou ◽  
Hiroyuki Suzuki ◽  
Masafumi Yoshihiro ◽  
...  

2000 ◽  
Author(s):  
Lester J. Kozlowski ◽  
Kadri Vural ◽  
William E. Tennant ◽  
William E. Kleinhans ◽  
Isoris S. Gergis

2001 ◽  
Vol 12 (04) ◽  
pp. 459-467
Author(s):  
CLAUDIO D. ARLANDINI ◽  
MATTEO J. BOSCHINI ◽  
ANDREA MATTASOGLIO

In this work we describe a series of performance tests on different architectures of high bandwidth local area networks, contemporarily in use at C.I.L.E.A. (Inter-University Consortium for Automatic Elaboration of Lombardy) to connect multi-processor machines devoted to educational and research purposes, such as fluido-dynamic and mechanical simulations. This LAN is essentially made out of a standard FDDI ring, and an HyperFabric backbone. HyperFabric is a Hewlett-Packard high performance network system bus, with a declared maximum bandwidth of 2.5 Gbit/s full duplex per link. We present a comparison, in terms of effective bandwidth, average throughput and CPU consumption of the above mentioned network systems. Furthermore we also describe the effects, in terms of transfer efficiency, of such a mixed environment, in which different systems co-exist and must often be cross-walked by various applications, as backups and mass storage access. Measurements and comparisons are made using Open Software tools like netperf and HetPIPE.


1989 ◽  
Vol 28 (S3) ◽  
pp. 315
Author(s):  
Katsumi Murai ◽  
Makoto Ichinose ◽  
Yuzuru Kuroki ◽  
Makoto Usui ◽  
Yuji Tagaki ◽  
...  

1994 ◽  
Vol 2 (4) ◽  
pp. 19-20 ◽  
Author(s):  
M.T. Postek ◽  
A.E. Vladar

One of the major advancements applied to scanning electron microscopy (SEM) during the past 10 years has been the development and application of digital imaging technology. Advancements in technology, notably the availability of less expensive, high-density memory chips and the development of high speed analog-to-digital converters, mass storage and high performance central processing units have fostered this revolution. Today, most modern SEM instruments have digital electronics as a standard feature. These instruments, generally have 8 bit or 256 gray levels with, at least, 512 X 512 pixel density operating at TV rate. In addition, current slow-scan commercial frame-grabber cards, directly applicable to the SEM, can have upwards of 12-14 bit lateral resolution permitting image acquisition at 4096 X 4096 resolution or greater.


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