Orthogonal frequency division multiplexing system provides a promising physical layer for 4G and 3GPP LTE systems in terms of efficient use of bandwidth and high data rates, this technology suffers from Inter Symbol Interference and Inter Carrier Interference. On the other hand, multiple input multiple output system is deployed along with orthogonal frequency division multiplexing in the new 80...

Computing tight WCET bounds in the presence of timing anomalies – found in almost any modern hardware architecture – is a major challenge of timing analysis. In this paper, we renew the discussion about timing anomalies, demonstrating that even simple hardware architectures are prone to timing anomalies. We furthermore complete the list of timing-anomalous cache replacement policies, proving th...

Synaptic plasticity is known to depend on the timing of pre and postsynaptic spikes, a.k.a. spike-timing-dependent plasticity (STDP). This implies that outcomes brought about by STDP should be sensitive to the dynamic properties of pre and postsynaptic neuron activity. Furthermore, because the classical model of STDP does not consider the effect of various pre and postsynaptic spike patterns on...

This paper examines how hedge funds manage their market risk according to changes in aggregate liquidity conditions. Using a large sample of equity-oriented hedge funds during the period of 1994–2008, we find strong evidence that hedge-fund managers possess the ability to time market liquidity at both the style category level and the individual fund level. They increase (decrease) their portfol...

The dependence of yield in respect to design margin is depicted in Figure 1. Below a certain level, yield is destined to be 0, because physical phenomena that occur, and may only become evident after the design phase, in real life devices impair the majority of paths. Increasing margin is going to make the design more robust against those phenomena but also is going to increase the cost of desi...

There is substantial evidence that cryptic female choice (CFC) is present in numerous taxa. Several mechanisms have been proposed for CFC; however, we only have experimental evidence for a few of them. Female control of oviposition timing is a potentially widespread mechanism of CFC, but it has never been experimentally demonstrated. The aims of this study are to test 2 critical predictions of ...

A new scheme is presented for generating optimal timing and power models, which can speed up timing and power analyses with full accuracy in systemon-chip (SoC) designs. In this scheme, the nonlinear multidimensional timing and power lookup tables in semiconductor libraries are transformed into optimized (piecewise) polynomial equations in an efficient and accurate manner. The transform problem...

The timing system of SPring-8 booster synchrotron generates various timing signals concerning beam injection, acceleration from 1 GeV to 8 GeV and ejection. We have improved the timing system of the synchrotron giving it better stability and flexibility. This improvement results the other merits of advanced operations, for example, storing electron beam in the synchrotron, changing the injectio...

In this paper, thermal effects of laser irradiance on biological tissue is investigated using computer simulations. Earlier attempts in this field made use of finite difference and finite element techniques. Here a novel approach is adopted to improve the results. The effect of our implicit approach on the convergence procedure and accuracy of results, with different timing steps, is explor...