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Nina Desai, Jeffrey M Goldberg, Cynthia Austin, Tommaso Falcone
OBJECTIVE: To determine whether cleavage anomalies, multinucleation, and specific cellular kinetic parameters available from time-lapse imaging are predictive of developmental capacity or blastocyst chromosomal status. DESIGN: Retrospective analysis of prospectively collected data. SETTING: Single academic center. PATIENT(S): A total of 1,478 zygotes from patients with blastocysts biopsied for preimplantation genetic screening were cultured in the EmbryoScope...
February 13, 2018: Fertility and Sterility
M Mugnaine, A C Mathias, M S Santos, A M Batista, J D Szezech, R L Viana
The turnstile provides us a useful tool to describe the flux in twist Hamiltonian systems. Thus, its determination allows us to find the areas where the trajectories flux through barriers. We show that the mechanism of the turnstile can increase the flux in nontwist Hamiltonian systems. A model which captures the essence of these systems is the standard nontwist map, introduced by del Castillo-Negrete and Morrison. For selected parameters of this map, we show that chaotic trajectories entering in resonances zones can be explained by turnstiles formed by a set of homoclinic points...
January 2018: Physical Review. E
G Gambino, M C Lombardo, M Sammartino
In this paper we investigate the complex dynamics originated by a cross-diffusion-induced subharmonic destabilization of the fundamental subcritical Turing mode in a predator-prey reaction-diffusion system. The model we consider consists of a two-species Lotka-Volterra system with linear diffusion and a nonlinear cross-diffusion term in the predator equation. The taxis term in the search strategy of the predator is responsible for the onset of complex dynamics. In fact, our model does not exhibit any Hopf or wave instability, and on the basis of the linear analysis one should only expect stationary patterns; nevertheless, the presence of the nonlinear cross-diffusion term is able to induce a secondary instability: due to a subharmonic spatial resonance, the stationary primary branch bifurcates to an out-of-phase oscillating solution...
January 2018: Physical Review. E
Naoto Tsuji, Tomohiro Shitara, Masahito Ueda
We prove a generalized fluctuation-dissipation theorem for a certain class of out-of-time-ordered correlators (OTOCs) with a modified statistical average, which we call bipartite OTOCs, for general quantum systems in thermal equilibrium. The difference between the bipartite and physical OTOCs defined by the usual statistical average is quantified by a measure of quantum fluctuations known as the Wigner-Yanase skew information. Within this difference, the theorem describes a universal relation between chaotic behavior in quantum systems and a nonlinear-response function that involves a time-reversed process...
January 2018: Physical Review. E
Anatoly Dymarsky, Nima Lashkari, Hong Liu
Motivated by the qualitative picture of canonical typicality, we propose a refined formulation of the eigenstate thermalization hypothesis (ETH) for chaotic quantum systems. This formulation, which we refer to as subsystem ETH, is in terms of the reduced density matrix of subsystems. This strong form of ETH outlines the set of observables defined within the subsystem for which it guarantees eigenstate thermalization. We discuss the limits when the size of the subsystem is small or comparable to its complement...
January 2018: Physical Review. E
Diana Henz, Alexander John, Christian Merz, Wolfgang I Schöllhorn
A large body of research has shown superior learning rates in variable practice compared to repetitive practice. More specifically, this has been demonstrated in the contextual interference (CI) and in the differential learning (DL) approach that are both representatives of variable practice. Behavioral studies have indicate different learning processes in CI and DL. Aim of the present study was to examine immediate post-task effects on electroencephalographic (EEG) brain activation patterns after CI and DL protocols that reveal underlying neural processes at the early stage of motor consolidation...
2018: Frontiers in Human Neuroscience
Y Ding, S M Pyo, R H Müller
smartLipids® as the 3rd lipid nanoparticle generation are made from a complex lipid mixture. The chaotic particle matrix structure provides higher loading with actives and a firmer inclusion inside the particle matrix being more protective for chemically labile molecules. Thus, these particles were used to develop an optimized retinol formulation. As a new approach, the old concept of the core-shell SLN particles was combined with the novel smartLipids® technology as new stabilization model. Particles were produced by hot high pressure homogenization, loaded with increasing amounts of retinol (5%, 15%, 20%), and both the physical (size, crystallinity) and chemical stability were monitored...
December 1, 2017: Die Pharmazie
Xiaolin Wang, Silas Alben
Over the past few decades, oscillating flexible foils have been used to study the physics of organismal propulsion in different fluid environments. Here, we extend this work to a study of flexible foils in a frictional environment. When the foil is oscillated by heaving at one end but is not free to locomote, the dynamics change from periodic to non-periodic and chaotic as the heaving amplitude increases or the bending rigidity decreases. For friction coefficients lying in a certain range, the transition passes through a sequence of N-periodic and asymmetric states before reaching chaotic dynamics...
January 2018: Proceedings. Mathematical, Physical, and Engineering Sciences
Aminur Rahman, Ian Jordan, Denis Blackmore
It has been observed through experiments and SPICE simulations that logical circuits based upon Chua's circuit exhibit complex dynamical behaviour. This behaviour can be used to design analogues of more complex logic families and some properties can be exploited for electronics applications. Some of these circuits have been modelled as systems of ordinary differential equations. However, as the number of components in newer circuits increases so does the complexity. This renders continuous dynamical systems models impractical and necessitates new modelling techniques...
January 2018: Proceedings. Mathematical, Physical, and Engineering Sciences
Yi Zhang, Xiaomei Li, Yongqiang Jin
Right atrial appendage aneurysm is an extremely rare congenital malformation with unknown aetiology. The most common potential complication is atrial arrhythmias including atrial flutter, atrial fibrillation, and atrial tachycardia. These arrhythmias are usually refractory to medication therapy. Radiofrequency catheter ablation has poor efficacy with low success rate and high recurrence rate. Aneurysm resection is the recommended treatment with satisfactory efficacy. We report a child with chaotic atrial tachycardia due to giant right atrial appendage aneurysm who was successfully treated by aneurysm resection...
February 13, 2018: Cardiology in the Young
Kongyi Li, Chunmiao Zhang, Yaping Wu, Wenzhi Lin, Xuanli Zheng, Yinghui Zhou, Shiqiang Lu, Junyong Kang
We report an experimental observation and direct control of quantum transport in artificial two-dimensional Au lattices. Combining the advanced techniques of low-temperature deposition and newly developed double-probe scanning tunneling spectroscopy, we display a two-dimensional carrier transport and demonstrate a strong in-plane transport modulation in the two-dimensional Au lattices. In well-ordered Au lattices, we observe the carrier transport behavior manifesting as a band-like feature with an energy gap...
February 12, 2018: Nano Letters
Ilkka Pietilä, Raisa Jurva, Hanna Ojala, Teuvo Tammela
Radical treatments of prostate cancer often lead to a pervasive liminal state that is characterised by multiple uncertainties that relate both to a possible recurrence of cancer and recovery from side effects, such as erectile and urinary dysfunctions. Liminality can make it difficult for cancer patients to narrate their experiences, as their stories lack a definite ending. After interviews with 22 Finnish men who had undergone radical prostatectomy, we analysed how men produce closure in their illness narratives...
February 11, 2018: Sociology of Health & Illness
Ziqian Liu
This paper presents a new theoretical design of nonlinear optimal control on achieving chaotic synchronization for coupled stochastic neural networks. To obtain an optimal control law, the proposed approach is developed rigorously by using Hamilton-Jacobi-Bellman (HJB) equation, Lyapunov technique, and inverse optimality, and hence guarantees that the chaotic drive network synchronizes with the chaotic response network influenced by uncertain noise signals. Furthermore, the paper provides four numerical examples to demonstrate the effectiveness of the proposed approach...
February 7, 2018: Neural Networks: the Official Journal of the International Neural Network Society
Matthew R Ponte, Alexander D Hudson, Kalaichelvi Saravanamuttu
Many of the extraordinary three-dimensional architectures that pattern our physical world emerge from complex nonlinear systems or dynamic populations whose individual constituents are only weakly correlated to each other. Shoals of fish, murmuration behaviours in birds, congestion patterns in traffic and even networks of social conventions are examples of spontaneous pattern formation, which cannot be predicted from the properties of individual elements alone. Pattern formation at a different scale has been observed or predicted in weakly correlated systems including superconductors, atomic gases near Bose Einstein condensation and incoherent optical fields...
February 9, 2018: Journal of Physical Chemistry Letters
Yong Kheng Goh, Haslifah M Hasim, Chris G Antonopoulos
In this paper, we study data from financial markets, using the normalised Mutual Information Rate. We show how to use it to infer the underlying network structure of interrelations in the foreign currency exchange rates and stock indices of 15 currency areas. We first present the mathematical method and discuss its computational aspects, and apply it to artificial data from chaotic dynamics and to correlated normal-variates data. We then apply the method to infer the structure of the financial system from the time-series of currency exchange rates and stock indices...
2018: PloS One
Robert H Anderson, Diane E Spicer, Rohit Loomba
Pediatric cardiologists treating patients with severe congenital cardiac defects define "visceral heterotaxy" on the basis of isomerism of the atrial appendages. The isomeric features represent an obvious manifestation of disruption of left-right asymmetry during embryonic development. Thus, there are two subsets of individuals within the overall syndrome, with features of either right or left isomerism. Within the heart, it is only the atrial appendages that are truly isomeric. The remainder of the cardiac components shows variable morphology, as does the arrangement of the remaining body organs...
February 6, 2018: Journal of Cardiovascular Development and Disease
S M Melo, G D Pinha, F H Ragonha, H M Fontes-Junior, A M Takeda
Reservoir operations alter, eliminate or restrain the natural hydrologic cycles. Biotic community has become subject to these non-cyclic events, responding by reducing the species diversity. Ephemeroptera species present distinct responses to environmental deterioration such that poses this assemblage between the most useful groups in biomonitoring programs. We hypothesized an alteration in beta diversity at the longitudinal species gradient, which will be influenced mainly by species losses between zones. Changes in temporal beta diversity is also expected, but the main drivers of such alterations will be the species turnover between the sampling period...
February 5, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
Alberto Mozo, Bruno Ordozgoiti, Sandra Gómez-Canaval
Efficient resource management in data centers is of central importance to content service providers as 90 percent of the network traffic is expected to go through them in the coming years. In this context we propose the use of convolutional neural networks (CNNs) to forecast short-term changes in the amount of traffic crossing a data center network. This value is an indicator of virtual machine activity and can be utilized to shape the data center infrastructure accordingly. The behaviour of network traffic at the seconds scale is highly chaotic and therefore traditional time-series-analysis approaches such as ARIMA fail to obtain accurate forecasts...
2018: PloS One
Heming Huang, Lyu-Chih Lin, Chih-Ying Chen, Dejan Arsenijević, Dieter Bimberg, Fan-Yi Lin, Frédéric Grillot
The optical feedback dynamics of two multimode InAs/GaAs quantum dot lasers emitting exclusively on sole ground or excited lasing states is investigated. The transition from long- to short-delay regimes is analyzed, while the boundaries associated to the birth of periodic and chaotic oscillations are unveiled to be a function of the external cavity length. The results show that depending on the initial lasing state, different routes to chaos are observed. These results are of importance for the development of isolator-free transmitters in short-reach networks...
January 22, 2018: Optics Express
J Morosi, N Berti, A Akrout, A Picozzi, M Guasoni, J Fatome
In this manuscript, we experimentally and numerically investigate the chaotic dynamics of the state-of-polarization in a nonlinear optical fiber due to the cross-interaction between an incident signal and its intense backward replica generated at the fiber-end through an amplified reflective delayed loop. Thanks to the cross-polarization interaction between the two-delayed counter-propagating waves, the output polarization exhibits fast temporal chaotic dynamics, which enable a powerful scrambling process with moving speeds up to 600-krad/s...
January 22, 2018: Optics Express
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