A transmission acknowledge flag is provided in a data transmission request command. When a send/receive control apparatus receives the data transmission command the transmission acknowledge flag, in an enable state a transmission counter is incremented. When the data transmission command is executed and data transmission is completed, the send/receive control apparatus causes the transmission counter to decrement. The send/receive control apparatus determines whether the data transmission has be...

A communication control system between parallel computers performs a broadcast communication in a network between parallel computer nodes. The communication control system includes a destination detecting unit for detecting the destination information designating the scope of the destination nodes from the data; a between-node distance processing unit for obtaining the distance between the particular computer node and the destination computer node, based on the destination information; and a des...

A performance evaluation for a parallel computer which carries out parallel processing in multiple processor by means of transmitting or receiving a message among the processors. Execution starting time, standby starting time for waiting reception of the message, message number on reception of the message, processor number of the processor, the message and time when the message is received, message number on transmitting of the message and time when the message execution ending time are memorize...

A parallel computer and all-to-all communications method. A plurality of processors are connected in an n-dimensional torus network, to provide an optimum communication method and apparatus for completing all-to-all communications within a shortest possible time. In the parallel computer having an n-dimensional rectangular parallelopiped torus network having a.sub.1 .times.a.sub.2 .times. . . . .times.a.sub.n processors, with the maximum value of a.sub.1, a.sub.2, . . . , a.sub.n defined as a.su...

In a computer equipped with a mask register in which is stored mask data indicating, for each array element, whether or not a statement such as an IF statement or an ELSE statement should be applied, the computer having a vector processor executing vector operation processing according to the mask data stored in the mask register, a first executing unit acquires first and second memory areas in which the mask data is saved in a stack formation. A second executing unit generates, when an IF state...

A message receiving method communicates a message among a plurality of computers in a parallel computer system, shortens a delay time in storing a received message in a user area of a memory, and realizes overlap between receipt of a message and execution by a processor. Each computer in the parallel computer system comprises a message buffer for temporarily storing the received message and a message handler for receiving a receive-a-message request from a processor of a computer to which it bel...

The present invention relates to a stabilizer composition for organic polymer material containing (a) 6-hydroxychroman compound, a phosphorus antioxidant and (c) phenolic antioxidant, wherein the component (a) is contained in a proportion of 0.5 wt %-10 wt % and the total amount of the component (b) and the component (c) is in a proportion of 99.5 wt %-90 wt %, of the total amount of the components (a), (b) and (c). The present invention also relates to an organic polymer material composition co...

p-Oxybenzoic acid compounds of the general formula: ##STR1## wherein R is alkyl having not less than two carbon atoms or aralkyl and Y is sulfur atom or sulfonyl. The compounds exhibit bactericidal activity and are useful as bactericides.

In a multi-series inverter arrangement comprising a DC circuit including a neutral point output terminal and a multi-series inverter including three series connections of first through fourth GTOs, each connected in parallel with the DC circuit, the juncture of the first and second GTOs and the juncture of the third and fourth GTOs being connected to the neutral point output terminal via respective clamping diodes and the first and third GTOs and the second and fourth GTOs being on and off contr...

An alkanedicarboxylic diester compound represented by the formula: ##STR1## wherein n is an integer of 0-8 and R is a benzyl group. The compounds have a repellency action to vermin and a plasticization action to thermoplastic polymers, and are useful as a pesticide or plasticizer.