We investigate the relative computational powers of a mesh with static buses and a mesh with unidirectional wrap-mounds. A mesh with unidirectional wraparounds is a torus with the restriction that any wraparoundlink of the architecture can only transmit data in one of the two directions at any clock tick. We show that the problem of packet routing can be solved as efficiently on a linear array ...

Mobile ad hoc networks may exhibit unidirectional links due to the nature of wireless communication. Presence of unidirectional links interferes with the control ow of many existing unicast routing protocols for such networks, which adversely eeects their performance and limits their applicability. In this paper, we present a new protocol designed to support unicast routing over both bidirectio...

Day and Tripathi [K. Day, A. Tripathi, Unidirectional star graphs, Inform. Process. Lett. 45 (1993) 123–129] proposed an assignment of directions on the star graphs and derived attractive properties for the resulting directed graphs. Cheng and Lipman [E. Cheng, M.J. Lipman, On the Day–Tripathi orientation of the star graphs: Connectivity, Inform. Process. Lett. 73 (2000) 5–10; E. Cheng, M.J. Li...

This paper investigates the relationship between total energy consumption and GDP in six countries of the Middle East , including Iran,Pakistan,Saudi Arabia,Oman,Bahrain and the United Arab Emirates. The data are annual and spanning the period 1980-2012.We employed Hsiao’s (1981) methodology to examine causality relation between total energy consumption and GDP.The empirical findings show a uni...

The effect of moisture absorption and high temperature on the compressive strength of unidirectional IM7/977-2 carbon/epoxy resins have been investigated experimentally. The specimens were divided into 4 groups, and tested under 4 different conditions by varying the testing temperature and moisture parameters. The fiber orientation selected were 0o, ±45o and 90o...

In this study, the effect of cold rolling process on the microstructure and texture evolution in 1wt. % Si non-oriented electrical steel was investigated. For this purpose, all samples were processed through single-stage hot rolling at 1100 ° C and two-stage cold rolling (cross rolling and unidirectional rolling) with intermediate annealing at 650 °C for 35 seconds. Finally, all of them were fu...

In this paper, we present a comparison of the blocking performance in unidirectional and bi-directional wavelength routed ring networks. This performance comparison reveals that, for the same load per node and equal number of wavelengths per link, the performance of a unidirectional ring with N nodes is very close to the performance of a bi-directional ring with 4N nodes. This comparison also s...

It is generally assumed that storing predictive relations between two events (E(1) consistently precedes E(2)) in memory as bi-directional associations does not require conscious awareness of this relation, whereas the formation of unidirectional associations that capture the direction of the relation (priming e(1) activates e(2), but e(2) not e(1)) does. This study reports a set of experiments...

Due to the asymmetric nature of the nucleotides, the extant informational biomolecule, DNA, is constrained to replicate unidirectionally on a template. As a product of molecular evolution that sought to maximize replicative potential, DNA's unidirectional replication poses a mystery since symmetric bidirectional self-replicators obviously would replicate faster than unidirectional self-replicat...