Return predictability may be hidden from view if the same information has different meanings at different times, especially if information is good news in one state but bad news in another. We illustrate, using price changes in industrial metals, how conclusions on stock market return predictability vary with the number of expansions and contractions in our sample. We also show how state-switch...

Machine-to-Machine (M2M) communication is crucial in developing Internet of Things (IoT). As it well known that cellular networks have been considered as the primary infrastructure for M2M communications, there are several key issues to be addressed order deploy communications over networks. Notably, rapid growth traffic dramatically increases energy consumption, degrades performance existing H...

We introduce a statistical model for times series data with nonlinear dynamics which iteratively segments the data into regimes with approximately linear dynamics and learns the parameters of each of those regimes. This model combines and generalizes two of the most widely used stochastic time series models|the hidden Markov model and the linear dynamical system|and is related to models that ar...

We take for granted the ability to fall asleep or to snap out of sleep into wakefulness, but these changes in behavioral state require specific switching mechanisms in the brain that allow well-defined state transitions. In this review, we examine the basic circuitry underlying the regulation of sleep and wakefulness and discuss a theoretical framework wherein the interactions between reciproca...

Simultaneous random access of massive machine type communications (MTC) devices are expected to cause congestion in the radio access network. Not only the performance of MTC, but the coexisting human to human (H2H) communications would also degrade dramatically without an appropriate medium access control (MAC) protocol. However, most existing solutions focus on the random access procedure with...

In this paper, we consider the saturation problem in 3GPP LTE cellular system caused by expected huge number of machine-type communication (MTC) devices, leading to a significant impact on both machine-to-machine (M2M) and human-to-machine H2H traffic. M2M communications are dominate traffic beyond networks. order address problem, proposed an advanced architecture designed for 5G networks enabl...

In this paper, the absorbent carryover effect in a designed counter-flow enthalpy exchanger is investigated. In a built prototype of the liquid desiccant dehumidifier, air and the absorbent solution are in contact and flow through a packed multi-channel polymer tower in a counter-flow pattern. To avoid the absorbent carryover, the tower is equipped with an eliminator. Experimental measurements ...

In this paper, the min-time optimal control problem is mainly investigated in the linear time invariant (LTI) continuous-time control system with a constrained input. A high order dynamical LTI system is firstly considered for this purpose. Then the Pontryagin principle and some necessary optimality conditions have been simultaneously used to solve the optimal control problem. These optimality ...

Machine type communications (MTC) in 3G/4G networks is getting more attention recently due to bursty nature of traffic characteristics in contrast to Poisson type H2H traffic. A large number of methods have been suggested in the literature. In this paper we give a mathematical model on performance analysis of Disjoint Allocation (DA) and Joint Allocation (JA) methods for allocating preambles to...

Various mechanisms have been proposed to interpret switching effect in thermally evaporated organic memory devices. In this work, we demonstrate a nonvolatile memory device having tristates, one OFF state and two different ON states lower-ON state, higher-ON state in the metal-insulator-metal MIM structure. Detailed study has revealed that different switching mechanisms are responsible for thes...