scholarly journals MATRIX PARALLEL PROCESSOR BASED ON A HOMOGENEOUS COMPUTATIONAL MEDIUM USING AN ADVANCED COMPUTING CELL

2021 ◽  
Vol 3 (1) ◽  
pp. 78-84
Author(s):  
S. P. Striamets ◽  
◽  
Opotiak Yu. V. Opotiak Yu. V. ◽  

Descri­bed ele­ment ba­se of a ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um, which can be ef­fecti­vely used in the cre­ati­on of sig­nal pro­ces­sing systems using pro­ces­sing al­go­rithms with de­ep pa­ral­le­li­za­ti­on, up to the bit le­vel. The analysis of ad­vanta­ges and di­sad­vanta­ges of the exis­ting ele­ment ba­se is car­ri­ed out and the new impro­ved struc­tu­re of a pro­ces­sor ele­ment of the ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um is of­fe­red. The pos­si­bi­lity of mul­tiple use of each ele­ment of the en­te­red da­ta, which pro­vi­des high com­pu­ta­ti­onal per­forman­ce of a ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um, is one of the sig­ni­fi­cant ad­vanta­ges of the systo­lic appro­ach. Ot­her be­ne­fits, such as mat­rix sca­la­bi­lity, simpli­city, and re­gu­la­rity of da­ta flows, are re­ali­zed thro­ugh the use of com­pu­ting cells with the simplest pos­sible archi­tec­tu­re. The archi­tec­tu­re of the ad­vanced pro­ces­sor ele­ment for construc­ti­on of the ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um with the impro­ved cha­rac­te­ris­tics in which me­ans of control of com­pu­ting pro­cess in a com­pu­ting cell, the mec­ha­nism of dup­li­ca­ti­on of the chan­nel of in­put of ad­justing in­forma­ti­on and me­ans of the ac­ce­le­ra­ted chan­ge of the ope­ra­ti­on co­de is of­fe­red. A num­ber of construc­ti­ve pro­po­sals for impro­ving the exis­ting c pro­ces­sor ele­ments and cre­ating a new ele­ment ba­se of a ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um are pro­po­sed. The mec­ha­nisms of tes­ting the mat­rix of a ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um in or­der to de­tect da­ma­ged and non-functi­oning pro­ces­sor ele­ments in­si­de the mat­rix, the mec­ha­nism of ra­pid chan­ge of the ope­ra­ting co­de of in­di­vid­ual pro­ces­sor ele­ments in­si­de the mat­rix of a ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um are descri­bed. The pos­si­bi­lity of per­forming control of the con­fi­gu­ra­ti­on co­de in the pro­cess of wri­ting to the mat­rix and control of the cor­rectness of ope­ra­ti­ons du­ring the ope­ra­ti­on of the mat­rix of a ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um is descri­bed. The de­sig­ned pro­ces­sor ele­ment of a ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um further compri­ses a di­ag­nostic unit, which gre­atly simpli­fi­es the pro­cess of tes­ting the mat­rix to de­tect ino­pe­rab­le com­pu­ting cells. The mec­ha­nism of incre­asing the pro­duc­ti­vity of the com­pu­ting fi­eld and ways to incre­ase the sur­vi­va­bi­lity of di­gi­tal sig­nal pro­ces­sing systems ba­sed on a ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um with re­con­fi­gu­ra­ti­on of the sig­nal pro­ces­sing al­go­rithm ta­king in­to ac­co­unt da­ma­ged, bro­ken or fa­iled pro­ces­sor ele­ments are descri­bed. The mat­rix of a pa­ral­lel spe­ci­ali­zed pro­ces­sor, bu­ilt on the ba­sis of a ho­mo­ge­ne­ous com­pu­ta­ti­onal me­di­um, which con­sists of 720 pro­ces­sor ele­ments, is descri­bed. Its functi­onal units and prin­ciple of ope­ra­ti­on are descri­bed.

Author(s):  
Iryna Kozlyuk ◽  
Yuliia Kovalenko

The problem of designing advanced computing systems in the class of structures of integrated modular avionics is considered. The unified topology of the internal network of the computer on the basis of Space Wire exchange channels and variants of its execution for various onboard applications is offered. Equivalent reliability schemes of each of the specific structures are introduced and the probabilities of trouble-free operation of each structure are analyzed. Families of graphic dependencies are given. The analysis of the existing principles and algorithms for testing multiprocessor multimodal onboard digital computer systems is given; the new testing algorithm for the multiprocessor systems which follows the software design standards for products of integrated modular avionics is offered. The structure of the unified automated workplace for checking the functional modules of integrated modular avionics is considered. Specific requirements inherent in the workplaces for testing integrated avionics are identified: an increased level of control of the hardware component of products; the ability to simulate the failure state of individual components of avionics to check the mode of reconfiguration of the computer system; modular construction of software with the division of verification tests into components performed at the level of each CPM and the computer as a whole in single-task and multitasking modes; openness of architecture of a workplace, which provides an ability to change the level of control complexity of a product and control of one class of complexity; intra-project unification of both hardware and software of the workstation of the inspection.


Psihologija ◽  
2002 ◽  
Vol 35 (1-2) ◽  
pp. 97-113
Author(s):  
Dusan Savicevic

Relation between results obtained from 25 tests for estimation of efficiency of perceptual, serial and parallel processor and 8 tests that estimate different modalities of aggressiveness, were analyzed under the biorthogonal model of canonical correlation analysis, on a sample of 647 male subjects, age between 19 to 27. The results show that there is significant, medium high (0,65), logically negative canonical correlation between cognitive efficiency and aggressiveness. Canonical factor derived from cognitive tests was similar to general cognitive factor because all cognitive tests had substantial correlation with it, whereby correlations of tests of serial processing were systematically higher than correlation of tests of parallel and particularly of perceptual processing. Canonic factor derived from tests of aggressiveness was not similar to invert scaled factor of aggressiveness of second order because tests of basic aggressiveness and impulsiveness that were otherwise dominant salient of general factor of aggressiveness, did not have significant correlation with canonical factor derived from tests of aggressiveness. According to that, it seams that inferior functioning of cognitive and particularly serial processor is connected only to those modalities of aggressiveness where there are also disorders of other conative regulators, especially systems for coordination and control of conative functions, but not with basic aggressiveness. That, basically biological characteristic of system for regulation and control of attack reaction, is not, according to all, in significant correlation with efficiency of cognitive processors.


Author(s):  
R. R. Dils ◽  
P. S. Follansbee

Electric fields have been applied across oxides growing on a high temperature alloy and control of the oxidation of the material has been demonstrated. At present, three-fold increases in the oxidation rate have been measured in accelerating fields and the oxidation process has been completely stopped in a retarding field.The experiments have been conducted with an iron-base alloy, Pe 25Cr 5A1 0.1Y, although, in principle, any alloy capable of forming an adherent aluminum oxide layer during oxidation can be used. A specimen is polished and oxidized to produce a thin, uniform insulating layer on one surface. Three platinum electrodes are sputtered on the oxide surface and the specimen is reoxidized.


Author(s):  
D. M. DePace

The majority of blood vessels in the superior cervical ganglion possess a continuous endothelium with tight junctions. These same features have been associated with the blood brain barrier of the central nervous system and peripheral nerves. These vessels may perform a barrier function between the capillary circulation and the superior cervical ganglion. The permeability of the blood vessels in the superior cervical ganglion of the rat was tested by intravenous injection of horseradish peroxidase (HRP). Three experimental groups of four animals each were given intravenous HRP (Sigma Type II) in a dosage of.08 to.15 mg/gm body weight in.5 ml of.85% saline. The animals were sacrificed at five, ten or 15 minutes following administration of the tracer. Superior cervical ganglia were quickly removed and fixed by immersion in 2.5% glutaraldehyde in Sorenson's.1M phosphate buffer, pH 7.4. Three control animals received,5ml of saline without HRP. These were sacrificed on the same time schedule. Tissues from experimental and control animals were reacted for peroxidase activity and then processed for routine transmission electron microscopy.


Author(s):  
G. Mazzocchi ◽  
P. Rebuffat ◽  
C. Robba ◽  
P. Vassanelli ◽  
G. G. Nussdorfer

It is well known that the rat adrenal zona glomerulosa steroidogenic activity is controlled by the renin-angiotensin system. The ultrastructural changes in the rat zona glomerulosa cells induced by renovascular hypertension were described previously, but as far as we are aware no correlated biochemical and morphometric investigations were performed.Twenty adult male albino rats were divided into 2 experimental groups. One group was subjected to restriction of blood flow to the left kidney by the application of a silver clip about the left renal artery. The other group was sham-operated and served as a control. Renovascular hypertension developed in about 10 days: sistolic blood pressure averaged 165 ± 6. 4 mmHg, whereas it was about 110 ± 3. 8 mmHg in the control animals. The hypertensive and control rats were sacrificed 20 days after the operation. The blood was collected and plasma renin activity was determined by radioimmunological methods. The aldosterone concentration was radioimmunologically assayed both in the plasma and in the homogenate of the left capsular adrenal gland.


Author(s):  
Henry I. Smith ◽  
D.C. Flanders

Scanning electron beam lithography has been used for a number of years to write submicrometer linewidth patterns in radiation sensitive films (resist films) on substrates. On semi-infinite substrates, electron backscattering severely limits the exposure latitude and control of cross-sectional profile for patterns having fundamental spatial frequencies below about 4000 Å(l),Recently, STEM'S have been used to write patterns with linewidths below 100 Å. To avoid the detrimental effects of electron backscattering however, the substrates had to be carbon foils about 100 Å thick (2,3). X-ray lithography using the very soft radiation in the range 10 - 50 Å avoids the problem of backscattering and thus permits one to replicate on semi-infinite substrates patterns with linewidths of the order of 1000 Å and less, and in addition provides means for controlling cross-sectional profiles. X-radiation in the range 4-10 Å on the other hand is appropriate for replicating patterns in the linewidth range above about 3000 Å, and thus is most appropriate for microelectronic applications (4 - 6).


Author(s):  
Amankwah K.S. ◽  
A.D. Weberg ◽  
R.C. Kaufmann

Previous research has revealed that passive (involuntary inhalation) tobacco smoking during gestation can have adverse effects upon the developing fetus. These prior investigations did not concentrate on changes in fetal morphology. This study was undertaken to delineate fetal neural abnormalities at the ultrastructural level in mice pups exposed in utero to passive maternal smoking.Pregnant study animals, housed in a special chamber, were subjected to cigarette smoke daily from conception until delivery. Blood tests for determination of carbon monoxide levels were run at 15-18 days gestation. Sciatic nerve tissue from experimental and control animals were obtained following spontaneous delivery and fixed in 2.5% gluteraldehyde in 0.1M cacodylate buffer pH 7.3. The samples were post-fixed in osmium ferrocyanide (1:1 mixture of 1.5% aqueous OSO4 and 2.5% K4 Fe(CN)6). Following dehydration, the tissues were infiltrated with and embedded in Spurr. Sections were stained with uranyl acetate and lead citrate.


Author(s):  
R. E. Worsham ◽  
J. E. Mann ◽  
E. G. Richardson

This superconducting microscope, Figure 1, was first operated in May, 1970. The column, which started life as a Siemens Elmiskop I, was modified by removing the objective and intermediate lenses, the specimen chamber, and the complete vacuum system. The large cryostat contains the objective lens and stage. They are attached to the bottom of the 7-liter helium vessel and are surrounded by two vapor-cooled radiation shields.In the initial operational period 5-mm and 2-mm focal length objective lens pole pieces were used giving magnification up to 45000X. Without a stigmator and precision ground pole pieces, a resolution of about 50-100Å was achieved. The boil-off rate of the liquid helium was reduced to 0.2-0.3ℓ/hour after elimination of thermal oscillations in the cryostat. The calculated boil-off was 0.2ℓ/hour. No effect caused by mechanical or electrical instability was found. Both 4.2°K and 1.7-1.9°K operation were routine. Flux pump excitation and control of the lens were quite smooth, simple, and, apparently highly stable. Alignment of the objective lens proved quite awkward, however, with the long-thin epoxy glass posts used for supporting the lens.


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