abStract McFarlan's strategic grid postulated that the impact of existing information systems and impact of the portfolio BLOCKINof BLOCKINplanned BLOCKINinformation BLOCKINsystems BLOCKINconstitute BLOCKINtwo BLOCKINdimensions BLOCKINon BLOCKINwhich BLOCKINthe BLOCKINchief BLOCKINexecutive BLOCKINofficer and BLOCKINchief BLOCKINinformation BLOCKINofficer BLOCKINcould BLOCKINassess BLOCKINtheir...

Information must take up space, must weigh, and its flux must be limited. Quantum limits on communication and information storage leading to these conclusions are here described. Quantum channel capacity theory is reviewed for both steady state and burst communication. An analytic approximation is given for the maximum signal information possible with occupation number signal states as a functi...

background: accurate and timely information and communication are vital to adequately prepare individual health organizations for emergency events. the current article investigated health-related communication and information systems for emergency management in iran. methods: the present study was conducted in 2009 with a mixed qualitative and quantitative approach. simple random purposeful sam...

epistemology or the theory of knowledge is seeking the nature of knowledge and justifying the belief. the theory of knowledge is the central part of the philosophical studies; because if the philosophy is seeking the truth. the main question is how we can reach the truth and justify the believes. the present paper, therefore. aims to study the concept of information from the viewpoint of episte...

in this paper, the channel capacity for different models of Poisson optical communication channels has been derived. The closed form expression for the single input single output (SISO) Poisson channel -derived by Kabanov in 1978, and Davis in 1980will be investigated. In addition, we derive closed form expressions for the capacity of the parallel Poisson channel and the capacity of the multipl...

Computational mechanics quantifies structure in a stochastic process via its causal states, leading to the process’s minimal, optimal predictor—the -machine. We extend computational mechanics to communication channels coupling two processes, obtaining an analogous optimal model—the -transducer—of the stochastic mapping between them. Here, we lay the foundation of a structural analysis of commun...

In this paper, the channel capacity for different models of Poisson optical communication channels has been derived. The closed form expression for the single input single output (SISO) Poisson channel -derived by Kabanov in 1978, and Davis in 1980will be investigated. In addition, we derive closed form expressions for the capacity of the parallel Poisson channel and the capacity of the multipl...

The cognitive interference channel with unidirectional destination cooperation (CIFC-UDC) is a cognitive interference channel (CIFC) where the cognitive (secondary) destination not only decodes the information sent from its sending dual but also helps enhance the communication of the primary user. This channel model is an extension of the original CIFC to achieve a win-win solution under the co...

Computational mechanics quantifies structure in a stochastic process via its causal states, leading to the process’s minimal, optimal predictor—the -machine. We extend computational mechanics to communication channels coupling two processes, obtaining an analogous optimal model—the -transducer—of the stochastic mapping between them. Here, we lay the foundation of a structural analysis of commun...