Coherence effects on the detection performance of quadratic array processors, with applications to large‐array matched‐field beamforming

1990 ◽  
Vol 87 (2) ◽  
pp. 737-747 ◽  
Author(s):  
Dennis R. Morgan ◽  
Thomas M. Smith
Keyword(s):  
Detection Performance ◽  
Large Array ◽  
Coherence Effects ◽  
Array Processors

A DESIGN METHODOLOGY FOR VERY LARGE ARRAY PROCESSORS—PART 1: GIPOP PROCESSOR ARRAY

1995 ◽  
Vol 09 (02) ◽  
pp. 231-262
Author(s):  
N. VENKATESWARAN ◽  
S. PATTABIRAMAN ◽  
R. DEVANATHAN ◽  
B. KUMARAN ◽  
ASHRAF AHMED ◽  
...  
Keyword(s):  
High Performance ◽  
Design Methodology ◽  
General Purpose ◽  
Massively Parallel ◽  
Inner Product ◽  
Processor Array ◽  
Large Array ◽  
Outer Product ◽  
Very Large Array ◽  
Array Processors

Very Large Array Processors (VLAP) will be the need of the future for solving computationally intense Very Large Problems (VLP) common in pattern recognition, image processing and other related areas of digital signal processing. Design methodology of such VLAPs for massively parallel dedicated/general purpose applications is highly complex. Two companion papers (Part 1 and Part 2) on VLAP are presented in this issue. In Part 1, we propose a VLAP called Reconfigurable GIPOP Processor Array (RGPA). The RGPA is made up of high performance processing elements called the Generalized Inner Product Outer Product (GIPOP) processor. Unlike the traditional special/general purpose processors, ours has a totally different and new architecture and organization involving higher level functional units to match with the complex computational structures of numeric algorithms and suitable for massively parallel processing. We also present a strategy for mapping VLPs on VLAPs. In Part 2, we propose a novel VLSI design methodology for implementing cost effective and very high performance processors meant for special purpose applications and in particular, for VLAPs.

Linear Arrays of Helical Polyribosomes in Cells Exposed to Antitumor Drug Vincristine Sulfate

1969 ◽  
Vol 27 ◽  
pp. 358-359
Author(s):  
Awtar Krishan
Keyword(s):  
Close Association ◽  
Annulate Lamellae ◽  
Large Array ◽  
Vincristine Sulfate ◽  
Linear Arrays ◽  
Golgi Membranes ◽  
Related Drug ◽  
Drug Leads ◽  
Lethal Doses ◽  
Vinblastine Sulfate

Earle's L-929 fibroblasts treated with mitosis-arresting but sub-lethal doses of vinblastine sulfate (VLB) show hypertrophy of the granular endoplasmic reticulum and annulate lamellae. Exposure of the cells to heavier doses of vincristine sulfate (VCR), a VLB-related drug, leads to the accumulation of large amounts of helical polyribosomes, Golgi membranes and crystals in the cytoplasm. In many of these cells a large number of helical polyribosomes are arranged in prominent linear rows, some of which may be up to 5 micrometers in length. Figure 1 shows a large array of helical polyribosomes near a crystalline mass (CRS) in an Earle's L-929 fibroblast exposed to VCR (5ϒ/ml.) for 3 hours At a higher magnification, as seen in figure 2, the helical polyribosomes are seen arranged in parallel rows. In favorably cut sections, a prominent backbone like "stalk" of finely granular material, measuring approximately 300Å in width is seen in close association with the linear rows of helical polyribosomes.

Sign in / Sign up

Export Citation Format

Share Document