In this paper, an all-optical AND logic scheme which exploits the cross-phase modulation (XPM) effect in semiconductor-optical-amplifier-assisted Mach-Zehnder Interferometer (SOA-MZI), is proposed, performance analyzed and parameters optimized. The proposal is validated and the system performance under various parameters is examined through numerical simulations. With only moderate parameters, ...

A method for the realization of fail-safe sequential circuits is presented where flip-flops are employed for representing the internal states. First, such a design technique where the circuit will be trapped in an erroneous state into which it is transferred by a fault is shown. Further, the condition for assuring that the circuit will be dropped into the particular (predetermined) final state ...

One of the relevant tasks of the teaching-learning process is that of evaluation. In this sense, estimating the academic performance exhibited by the final evaluation of a student, at the end of the current semester, has become of particular interest for students, parents, educators, educative managers and researchers alike. More specifically, the current paper is focused in determining whether...

A fundamental aspect of any concurrent system is how processes communicate with each other. Ultimately, all communication involves concurrent reads and writes of shared memory cells, or registers. The stronger the guarantees provided by a register, the more useful it is to the user, but the harder it may be to implement in practice. Thus it is of interest to determine which types of registers c...

Petrov (1996) proved the connection between general moment conditions and the applicability of the strong law of large numbers to a sequence of pairwise independent and identically distributed random variables. This note examines this connection to a sequence of pairwise negative quadrant dependent (NQD) and identically distributed random variables. As a consequence of the main theorem ...

In this paper, vector ultrametric spaces are introduced and a fixed point theorem is given for correspondences. Our main result generalizes a known theorem in ordinary ultrametric spaces.

in this paper, a concept of generalized weakly contraction mappings in partially ordered fuzzy metric spaces is introduced and  coincidence point  theorems on partially ordered fuzzy metric spaces are proved. also, as the corollary of these theorems, some common fixed point theorems on partially ordered fuzzy metric spaces are presented.

The main purpose of this paper is to establish different types of convergence theorems for fuzzy Henstock integrable functions, introduced by  Wu and Gong cite{wu:hiff}. In fact, we have proved fuzzy uniform convergence theorem, convergence theorem for fuzzy uniform Henstock integrable functions and fuzzy monotone convergence theorem. Finally, a necessary and sufficient condition under which th...

In this study, one group of respondents is offered to purchase a safety device to be installed in their cars, while another group is offered a public safety, program (improved road quality) which results in the same size risk reduction. In terms of the value of a statistical life, our results are very, reasonable. However, the WTP for the private safety device is higher than the WTP for the pub...