A frequent observation in plant-animal mutualistic networks is that abundant species tend to be more generalised, interacting with a broader range of interaction partners than rare species. Uncovering the causal relationship between abundance and generalisation has been hindered by chicken-and-egg dilemma: by-product being abundant, or does high result from generalisation? Here, we analyse database plant-pollinator plant-seed disperser networks, provide strong evidence link uni-directional....

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTime-dependent quantum study of the hydrogen cyanide (HCN .fwdarw. HNC) isomerizationBoon Leong Lan and Joel M. BowmanCite this: J. Phys. Chem. 1993, 97, 48, 12535–12540Publication Date (Print):December 1, 1993Publication History Published online1 May 2002Published inissue 1 December 1993https://pubs.acs.org/doi/10.1021/j100150a015https://doi.org/10.1021/j100150a015research-articleACS PublicationsRequest reuse permissionsArticle...

We study the spatial interference pattern of two-photon correlation function for a coherently phased linear array $N$ emitters with double-Raman scheme, each producing nonclassically correlated photon pairs. The ${N}^{2}$ dependence in serves as coherent amplification method intense nonclassical light. distribution can be controlled by lasers, and depends on detection configuration. For two coincident detectors, displays Talbot pattern, but modulated quantum effect. image revival distance is...

Abstract The biophotovoltaic cell (BPV) is deemed to be a potent green energy device as it demonstrates the generation of renewable from microalgae; however, inadequate electron microalgae significant impediment for functional employment these cells. photosynthetic process not only affected by temperature, CO 2 concentration and light intensity but also spectrum light. Thus, detailed understanding influences essential. Accordingly, we developed spectrally optimized using programmable LED...

Newtonian and special-relativistic predictions, based on the same model parameters initial conditions for trajectory of a low-speed scattering system are compared. When is chaotic, two predictions can rapidly diverge completely, not only quantitatively but also qualitatively, due to an exponentially growing separation taking place in region. In contrast, when nonchaotic, breakdown agreement between takes very long time, since difference grows linearly. More importantly, case chaotic...

The behavior of the periodically kicked pendulum is determined classically and quantum mechanically. Our earlier analytic study [Phys. Rev. A 41, 2952 (1990)] confirmed extended by numerical results presented here. We are able to construct minimum uncertainty, Gaussian wave packets that maintain their form, shadow corresponding classical motion for long times when nonchaotic or only weakly chaotic. However, robustly chaotic, quantum-mechanical probability distribution grows macroscopically...

The dynamics of a periodically delta-kicked Hamiltonian system moving at low speed (i.e., much less than the light) is studied numerically. In particular, trajectory predicted by Newtonian mechanics compared with special relativistic for same parameters and initial conditions. We find that trajectory, although close to some time, eventually disagrees completely regardless nature (chaotic, nonchaotic) each trajectory. However, agreement breaks down very fast if either or chaotic, but slower...

Although heavy-tailed fluctuations are ubiquitous in complex systems, a good understanding of the mechanisms that generate them is still lacking. Optical systems ideal candidates for investigating fluctuations, as they allow recording large datasets under controllable experimental conditions. A dynamical regime has attracted lot attention over years so-called low-frequency (LFFs) semiconductor lasers with optical feedback. In this regime, laser output intensity characterized by abrupt and...

Background Research suggests that treatment of multiple brain metastases (BMs) with stereotactic radiosurgery shows improvement when are detected early, providing a case for BM detection capabilities on small lesions. Purpose To demonstrate automatic three MRI datasets using deep learning‐based approach. improve the performance network is iteratively co‐trained from different domains. A systematic approach proposed to prevent catastrophic forgetting during co‐training. Study Type...

The correspondence limit is illustrated for the periodically kicked pendulum. classical dynamics of this system can be represented by a discrete map. A corresponding quantum map derived and then rendered in Ehrenfest formulation expectation values. representation studied minimum uncertainty Gaussian wave packet. It shown that as \ensuremath{\Elzxh} gets very small, followed decrease variance packet, shadows with an error approaching zero length time infinity. form packet preserved evolution...

Epilepsy, a nervous system disorder, is charac-terised by unprovoked, unpredictable, and recurrent seizures. To diagnose epileptic seizures, electroencephalography (EEG) frequently used in medical settings. Effective automated detection classification strategies are needed because visual analysis interpretation of EEG signals consume time call for specialised expertise. The main objective this paper to examine the effectiveness multiple rebalancing techniques address problem asynchronously...

We show that the RR-interval fluctuations, defined as difference between successive natural-logarithm of RR interval, for healthy, congestive-heart-failure (CHF) and atrial-fibrillation (AF) subjects are well modeled by non-Gaussian stable distributions. Our results suggest healthy or unhealthy fluctuation can generally be a sum large number independent physiological effects which identically distributed with infinite variance. Furthermore, we first time one indicator —the scale parameter...

New insight into the nature of Bohm's quantum force is presented. Based on our numerical study, we conclude that, for kicked pendulum, quantum-force time-series nonstationary states typically or generically non-Gaussian stable distributed with a flat power spectrum. For fixed system parameters and initial wave function, constant value spectrum are independent Bohmian angle. We conjecture that these properties also typical generic other classically chaotic Hamiltonian dynamical systems since...

The Newtonian and special-relativistic statistical predictions for the mean, standard deviation probability density function of position momentum are compared periodically-delta-kicked particle at low speed. Contrary to expectation, we find that predictions, which calculated from same parameters initial Gaussian ensemble trajectories, do not always agree if is sufficiently well-localized in phase space. Moreover, breakdown agreement very fast trajectories chaotic, but slow non-chaotic....