Optimizing Approach for Sifting Process to Solve a Common Type of Empirical Mode Decomposition Mode Mixing

Empirical mode decomposition (EMD), a new data-driven of time-series decomposition, has the advantage of supposing that a time series is non-linear or non-stationary, as is implicitly achieved in Fourier decomposition. However, the EMD suffers of mode mixing problem in some cases. The aim of this paper is to present a solution for a common type of signals causing of EMD mode mixing problem, in case a signal suffers of an intermittency. By an artificial example, the solution shows superior performance in terms of cope EMD mode mixing problem comparing with the conventional EMD and Ensemble Empirical Mode decomposition (EEMD). Furthermore, the over-sifting problem is also completely avoided; and computation load is reduced roughly six times compared with EEMD, an ensemble number of 50

L'accompagnement infirmier du patient atteint de sclérose en plaques: travail de Bachelor

Le présent travail porte sur les déterminants de l’accompagnement infirmier à l’égard d’une personne atteinte de sclérose en plaques (SEP). La SEP est une maladie neurodégénérative, incurable et évolutive qui a des conséquences sur les sphères physiques, psychiques, sociales et spirituelles du patient, et par conséquent, elle requiert une prise en soin globale de la part de l’infirmière. Le traitement médicamenteux n’est pas suffisant pour ralentir l’évolution de cette affection, d’autres services de soins sont également nécessaires pour offrir du bien-être au patient. Les poussées de la SEP sont imprévisibles et l’évolution de cette pathologie est incertaine tout comme l’avenir du patient. De plus le patient subit plusieurs pertes liées à sa maladie et peut donc présenter une détresse psychologique liée à ces pertes. La notion « accompagnement » est, à l’heure actuelle, devenue une compétence qui comprend plusieurs qualités importantes que l’infirmière met en oeuvre au moment du diagnostic de la SEP et tout au long du chemin de vie du patient. L’accompagnement englobe diverses composantes telles que l’empathie, l’écoute, la compassion et le respect qui permettent entre autre d’offrir une bonne qualité d’accompagnement au patient. Ce travail met en lumière les dix facteurs caratifs de la théorie « Human Caring » proposée par Watson (1998). Ceux-ci sont mis en lien avec plusieurs situations concrètes relatives à la SEP. Ce travail met en lumière les éléments qui contribuent à une bonne prise en soins et favorisent un accompagnement vis-à-vis du patient atteint de SEP. Tous les facteurs caratifs pris en considération ne peuvent pas être considérés dans cette prise en charge, car certains d’entre eux constituent un idéal, mais demeurent difficiles à appliquer dans la réalité de la pratique professionnelle autour de la SEP. A l’issue de cette réflexion, il est recommandé aux soignants des unités de neurologie de réfléchir quant à la mise en place d’un outil permettant d’évaluer tous les besoins des patients atteints de SEP afin de pouvoir y répondre. La création d’une anamnèse complète ou d’un questionnaire sur les attentes des personnes vivant avec cette maladie serait-il envisageable pour le futur

Photosynthesis-controlled calcification in a hypersaline microbial mat

We investigated the hypothesis that sulfate reduction rather than oxygenic photosynthesis promotes calcification in a hypersaline microbial mat by increasing the ion concentration product: ICP 5 [Ca2+] X [CO32-]. Pore‐water 3 calcium concentration profiles directly measured with microsensors show that calcium concentration in the photic zone decreased in illuminated mats and increased slightly in dark mats. High pH values in the photic zone of illuminated mats resulted in higher carbonate concentrations (2.25 mmol L-1) than in dark mats (0.75 mmol L-1), although the dissolved inorganic carbon (DIC) pore‐water concentration in the former was much lower (5.9 mmol L-1) than in the latter (9.9 mmol L-1). The pH‐induced rise in carbonate concentration in the light was the main factor influencing the ICP, while changes in Ca-1 concentration played a subsidiary role. Sulfate reduction did not result in a net pH increase in these mats, as rates in the photic zone were comparable between illuminated and dark mats (4 and 5 nmol cm-2 h-1, respectively), and pH increased in illuminated mats but not in dark mats. Calcium carbonate precipitation in the photic zone of these hypersaline mats is primarily controlled by photosynthesisinduced pH and carbonate concentration increases. However, heterotrophic bacteria, including sulfate reducers, play an important complementary role in calcification because they maintain high concentrations of DIC in the mat pore water

Inter-network regions of the Sun at millimetre wavelengths

The continuum intensity at wavelengths around 1 mm provides an excellent way to probe the solar chromosphere. Future high-resolution millimetre arrays, such as the Atacama Large Millimeter Array (ALMA), will thus produce valuable input for the ongoing controversy on the thermal structure and the dynamics of this layer. Synthetic brightness temperature maps are calculated on basis of three-dimensional radiation (magneto-)hydrodynamic (MHD) simulations. While the millimetre continuum at 0.3mm originates mainly from the upper photosphere, the longer wavelengths considered here map the low and middle chromosphere. The effective formation height increases generally with wavelength and also from disk-centre towards the solar limb. The average intensity contribution functions are usually rather broad and in some cases they are even double-peaked as there are contributions from hot shock waves and cool post-shock regions in the model chromosphere. Taking into account the deviations from ionisation equilibrium for hydrogen gives a less strong variation of the electron density and with it of the optical depth. The result is a narrower formation height range. The average brightness temperature increases with wavelength and towards the limb. The relative contrast depends on wavelength in the same way as the average intensity but decreases towards the limb. The dependence of the brightness temperature distribution on wavelength and disk-position can be explained with the differences in formation height and the variation of temperature fluctuations with height in the model atmospheres.Comment: 15 pages, 10 figures, accepted for publication in A&A (15.05.07

Correlating in situ RHEED and XRD to study growth dynamics of polytypism in nanowires

Design of novel nanowire (NW) based semiconductor devices requires deep understanding and technological control of NW growth. Therefore, quantitative feedback over the structure evolution of the NW ensemble during growth is highly desirable. We analyse and compare the methodical potential of reflection high-energy electron diffraction (RHEED) and X-ray diffraction reciprocal space imaging (XRD) for in situ growth characterization during molecular-beam epitaxy (MBE). Simultaneously recorded in situ RHEED and in situ XRD intensities show strongly differing temporal behaviour and provide evidence of the highly complementary information value of both diffraction techniques. Exploiting the complementarity by a correlative data analysis presently offers the most comprehensive experimental access to the growth dynamics of statistical NW ensembles under standard MBE growth conditions. In particular, the combination of RHEED and XRD allows for translating quantitatively the time-resolved information into a height-resolved information on the crystalline structure without a priori assumptions on the growth model. Furthermore, we demonstrate, how careful analysis of in situ RHEED if supported by ex situ XRD and scanning electron microscopy (SEM), all usually available at conventional MBE laboratories, can also provide highly quantitative feedback on polytypism during growth allowing validation of current vapour–liquid–solid (VLS) growth models

Renormalization group trajectories from resonance factorized S-matrices

We propose and investigate a large class of models possessing resonance factorized S-matrices. The associated Casimir energy describes a rich pattern of renormalization group trajectories related to flows in the coset models based on the simply laced Lie Algebras. From a simplest resonance S-matrix, satisfying the ``$\phi^3$-property'', we predict new flows in non-unitary minimal models.Comment: (7 pages) (no figures included

Segment-Based Genetic Programming

ABSTRACT Genetic Programming (GP) is one of the successful evolutionary computation techniques applied to solve classification problems, by searching for the best classification model applying the fitness evaluation. The fitness evaluation process greatly impacts the overall execution time of GP and is therefore the focus of this research study. This paper proposes a segment-based GP (SegGP) technique that reduces the execution time of GP by partitioning the dataset into segments, and using the segments in the fitness evaluation process. Experiments were done using four datasets and the results show that SegGP can obtain higher or similar accuracy results in shorter execution time compared to standard GP

Exact Conductance through Point Contacts in the ν=1/3\nu =1/3 Fractional Quantum Hall Effect

The conductance for tunneling through a point contact between two $\nu =1/3$ quantum Hall edges is described by a universal scaling function, which has recently been measured experimentally. We compute this universal function exactly, by using the thermodynamic Bethe ansatz and a Boltzmann equation.Comment: 10 pages, 1 figur