Wigner Ville Distribution in Signal Processing, using Scilab Environment
Directory of Open Access Journals (Sweden)
Petru Chioncel
2011-01-01
Full Text Available The Wigner Ville distribution offers a visual display of quantitative information about the way a signal’s energy is distributed in both, time and frequency. Through that, this distribution embodies the fundamentally concepts of the Fourier and time-domain analysis. The energy of the signal is distributed so that specific frequencies are localized in time by the group delay time and at specifics instants in time the frequency is given by the instantaneous frequency. The net positive volum of the Wigner distribution is numerically equal to the signal’s total energy. The paper shows the application of the Wigner Ville distribution, in the field of signal processing, using Scilab environment.
1992-06-01
equation. The first is that the integration is from minus infinity to plus infinty and another is that it is the integration of the resulting Distribution...5215 12. Mr. H.E. Spooner Tampella Power Corporation 2600 Reach Road P.O. Box 3308 Williamsport, PA 17701-0308 88
Directory of Open Access Journals (Sweden)
Mawardi Bahri
2017-01-01
Full Text Available The quaternion Wigner-Ville distribution associated with linear canonical transform (QWVD-LCT is a nontrivial generalization of the quaternion Wigner-Ville distribution to the linear canonical transform (LCT domain. In the present paper, we establish a fundamental relationship between the QWVD-LCT and the quaternion Fourier transform (QFT. Based on this fact, we provide alternative proof of the well-known properties of the QWVD-LCT such as inversion formula and Moyal formula. We also discuss in detail the relationship among the QWVD-LCT and other generalized transforms. Finally, based on the basic relation between the quaternion ambiguity function associated with the linear canonical transform (QAF-LCT and the QFT, we present some important properties of the QAF-LCT.
Fault diagnosis technology based on Wigner-Ville distribution in power electronics circuit
Rongjie, Wang; Yiju, Zhan; Meiqian, Chen; Haifeng, Zhou
2011-09-01
Based on Wigner-Ville distribution similarity, a method of fault diagnosis is proposed for power electronics circuits. After setting up the module time-frequency matrices of Wigner-Ville distribution for all fault signals, the similarities between the module time-frequency matrices of the fault signal and the former standard are then calculated, thus arriving at the diagnosis according to the principle of maximum similarity. The simulation result of fault diagnosis of a thyristor in a three-phase full-bridge-controlled rectifier shows that the method can accurately identify the fault types as well as the location of the fault elements for power electronics circuits, and it has an excellent performance for noise robustness and calculation complexity. Therefore, it is quite practically valuable in the solution to the fault problems for power electronics circuits.
Uncertainty Principles for Wigner-Ville Distribution Associated with the Linear Canonical Transforms
Directory of Open Access Journals (Sweden)
Yong-Gang Li
2014-01-01
Full Text Available The Heisenberg uncertainty principle of harmonic analysis plays an important role in modern applied mathematical applications, signal processing and physics community. The generalizations and extensions of the classical uncertainty principle to the novel transforms are becoming one of the most hottest research topics recently. In this paper, we firstly obtain the uncertainty principle for Wigner-Ville distribution and ambiguity function associate with the linear canonical transform, and then the n-dimensional cases are investigated in detail based on the proposed Heisenberg uncertainty principle of the n-dimensional linear canonical transform.
Bidari, Pooya Sobhe; Alirezaie, Javad; Tavakkoli, Jahan
2017-03-01
This paper presents a method for modeling and simulation of shear wave generation from a nonlinear Acoustic Radiation Force Impulse (ARFI) that is considered as a distributed force applied at the focal region of a HIFU transducer radiating in nonlinear regime. The shear wave propagation is simulated by solving the Navier's equation from the distributed nonlinear ARFI as the source of the shear wave. Then, the Wigner-Ville Distribution (WVD) as a time-frequency analysis method is used to detect the shear wave at different local points in the region of interest. The WVD results in an estimation of the shear wave time of arrival, its mean frequency and local attenuation which can be utilized to estimate medium's shear modulus and shear viscosity using the Voigt model.
Presumption of Phase Shift in Resonant Dynamical Systems using Wigner-Ville Distribution Function
Niimi, Hironobu; Yatsu, Shigeo; Kayukawa, Naoyuki
2002-02-01
The time evolution of the forced and eigen oscillation modes of a basic rotor model induced by an external force with frequencies of linear functions of time was analyzed by means of the Wigner-Ville distribution function. The instantaneous frequency of the forced oscillation was extracted from the spectrum distribution on the time-frequency plane, and the phase shift between the forced oscillation and the external force was calculated for both weak and strong nonstationariness cases. In the latter case, neither forced nor eigen modes could be separated definitely around the resonant point. This resulted in a discrepancy of the asymptotic value of the phase shift from π in cooperation with the finite frequency resolution. It was shown that the phase shift in this “mixed mode region” could be numerically traced and the bifurcation point could be approximately identified on the basis of the finding that the asymptotic value of the phase shift in the present model was π, irrespective of the nonstationariness.
Incorporation of Duffing Oscillator and Wigner-Ville Distribution in Traffic Flow Prediction
Directory of Open Access Journals (Sweden)
Anamarija L. Mrgole
2017-02-01
Full Text Available The main purpose of this study was to investigate the use of various chaotic pattern recognition methods for traffic flow prediction. Traffic flow is a variable, dynamic and complex system, which is non-linear and unpredictable. The emergence of traffic flow congestion in road traffic is estimated when the traffic load on a specific section of the road in a specific time period is close to exceeding the capacity of the road infrastructure. Under certain conditions, it can be seen in concentrating chaotic traffic flow patterns. The literature review of traffic flow theory and its connection with chaotic features implies that this kind of method has great theoretical and practical value. Researched methods of identifying chaos in traffic flow have shown certain restrictions in their techniques but have suggested guidelines for improving the identification of chaotic parameters in traffic flow. The proposed new method of forecasting congestion in traffic flow uses Wigner-Ville frequency distribution. This method enables the display of a chaotic attractor without the use of reconstruction phase space.
Directory of Open Access Journals (Sweden)
Yu-E Song
2014-01-01
Full Text Available The Wigner-Ville distribution (WVD based on the linear canonical transform (LCT (WDL not only has the advantages of the LCT but also has the good properties of WVD. In this paper, some new and important properties of the WDL are derived, and the relationships between WDL and some other time-frequency distributions are discussed, such as the ambiguity function based on LCT (LCTAF, the short-time Fourier transform (STFT, and the wavelet transform (WT. The WDLs of some signals are also deduced. A novel definition of the WVD based on the LCT and generalized instantaneous autocorrelation function (GWDL is proposed and its applications in the estimation of parameters for QFM signals are also discussed. The GWDL of the QFM signal generates an impulse and the third-order phase coefficient of QFM signal can be estimated in accordance with the position information of such impulse. The proposed algorithm is fast because it only requires 1-dimensional maximization. Also the new algorithm only has fourth-order nonlinearity thus it has accurate estimation and low signal-to-noise ratio (SNR threshold. The simulation results are provided to support the theoretical results.
1993-03-01
HIL.BERT SIOHN TRA NSFORM SMOHN TIME SAMPLED A N A L’YTIC DEPENDENT WDF PW SIGNAL SIGNAL CORRELATION FUNCTION D I G ITA L ] FILTER T] Fig. 2...Time-Frequency Representations, Kiuwer Academic Publishers, 1989. 6. Velez , E. and Absher, R., "Transient Analysis of Speech Signals using the Wigner
Widjaja, Joewono; Dawprateep, Saowaros; Chuamchaitrakool, Porntip
2017-07-01
Extractions of particle positions from inline holograms using a single coefficient of Wigner-Ville distribution (WVD) are experimentally verified. WVD analysis of holograms gives local variation of fringe frequency. Regardless of an axial position of particles, one of the WVD coefficients has the unique characteristics of having the lowest amplitude and being located on a line with a slope inversely proportional to the particle position. Experimental results obtained using two image sensors with different resolutions verify the feasibility of the present method.
Development of a Model Based Technique for Gear Diagnostics using the Wigner-Ville method
Choy, F.; Xu, A.; Polyshchuk, V.
1997-01-01
Imperfections in gear tooth geometry often result from errors in the manufacturing process or excessive material wear during operation. Such faults in the gear tooth geometry can result in large vibrations in the transmission system, and, in some cases, may lead to early failure of the gear transmission system. This report presents the study of the effects of imperfection in gear tooth geometry on the dynamic characteristics of a gear transmission system. The faults in the gear tooth geometry are modeled numerically as the deviation of the tooth profile from its original involute geometry. The changes in gear mesh stiffness due to various profile and pattern variations are evaluated numerically. The resulting changes in the mesh stiffness are incorporated into a computer code to simulate the dynamics of the gear transmission system. A parametric study is performed to examine the sensitivity of gear tooth geometry imperfections on the vibration of a gear transmission system. The parameters variations in this study consist of the magnitude of the imperfection, the pattern of the profile variation, and the total number of teeth affected. Numerical results from the dynamic simulations are examined in both the time and the frequency domains. A joint time-frequency analysis procedure using the Wigner-Ville Distribution is also introduced to identify the location of the damaged tooth from the vibration signature. Numerical simulations of the system dynamics with gear faults were compared to experimental results. An optimal tracker was introduced to quantify the level of damage in the gear mesh system. Conclusions are drawn from the results of this numerical study.
Directory of Open Access Journals (Sweden)
Jian Luo
2016-01-01
Full Text Available A cloud based health care system is proposed in this paper for the elderly by providing abnormal gait behavior detection, classification, online diagnosis, and remote aid service. Intelligent mobile terminals with triaxial acceleration sensor embedded are used to capture the movement and ambulation information of elderly. The collected signals are first enhanced by a Kalman filter. And the magnitude of signal vector features is then extracted and decomposed into a linear combination of enhanced Gabor atoms. The Wigner-Ville analysis method is introduced and the problem is studied by joint time-frequency analysis. In order to solve the large-scale abnormal behavior data lacking problem in training process, a cloud based incremental SVM (CI-SVM learning method is proposed. The original abnormal behavior data are first used to get the initial SVM classifier. And the larger abnormal behavior data of elderly collected by mobile devices are then gathered in cloud platform to conduct incremental training and get the new SVM classifier. By the CI-SVM learning method, the knowledge of SVM classifier could be accumulated due to the dynamic incremental learning. Experimental results demonstrate that the proposed method is feasible and can be applied to aged care, emergency aid, and related fields.
Zhang, Chao; Lin, Hong-bo; Li, Yue; Yang, Bao-jun
2013-09-01
Time-Frequency Peak Filtering (TFPF) is an effective method to eliminate pervasive random noise when seismic signals are analyzed. In conventional TFPF, the pseudo Wigner-Ville distribution (PWVD) is used for estimating instantaneous frequency (IF), but is sensitive to noise interferences that mask the borderline between signal and noise and detract the energy concentration on the IF curve. This leads to the deviation of the peaks of the pseudo Wigner-Ville distribution from the instantaneous frequency, which is the cause of undesirable lateral oscillations as well as of amplitude attenuation of the highly varying seismic signal, and ultimately of the biased seismic signal. With the purpose to overcome greatly these drawbacks and increase the signal-to-noise ratio, we propose in this paper a TFPF refinement that is based upon the joint time-frequency distribution (JTFD). The joint time-frequency distribution is obtained by the combination of the PWVD and smooth PWVD (SPWVD). First we use SPWVD to generate a broad time-frequency area of the signal. Then this area is filtered with a step function to remove some divergent time-frequency points. Finally, the joint time-frequency distribution JTFD is obtained from PWVD weighted by this filtered distribution. The objective pursued with all these operations is to reduce the effects of the interferences and enhance the energy concentration around the IF of the signal in the time-frequency domain. Experiments with synthetic and real seismic data demonstrate that TFPF based on the joint time-frequency distribution can effectively suppress strong random noise and preserve events of interest.
A pseudo Lindley distribution and its application | Zeghdoudi | Afrika ...
African Journals Online (AJOL)
In this paper, we introduce a new distribution named as the Pseudo Lindley Distribution (PsLD) as a generalization of the Lindley distribution (LD). A full and detailed description are provided in terms of moments, cumulates, characteristic function, failure, rate function, stochastic ordering, distributions of sums, and ...
Research on pseudo-color image generation technology of the distribution of gaseous pollutants
Yang, Jiao; Sheng, HuaiJie; Shao, Li; Cheng, YuBao
2016-11-01
In order to improve the visualization of the output data of gaseous pollutants monitoring system and study pseudo-color image generation technology, this research combines the column concentration data of polluted gas with spatial position parameter to design a grey-color conversion method based on visual pseudo-color coding, generates the pseudo-color images of column concentration of the distribution of polluted gas and evaluates the pseudo-color coding scheme designed in HSI color space. The evaluation results show that the designed coding scheme can effectively conduct pseudo-color display for the concentration section of polluted gas.
Solutions of selected pseudo loop equations in water distribution ...
African Journals Online (AJOL)
This paper demonstrated the use of Microsoft Excel Solver (a computer package) in solving selected pseudo loop equations in pipe network analysis problems. Two pipe networks with pumps and overhead tanks were used to demonstrate the use of Microsoft Excel Solver in solving pseudo loops (open loops; networks with ...
Algorithm for generation pseudo-random series with arbitrarily assigned distribution law
Directory of Open Access Journals (Sweden)
В.С. Єременко
2005-04-01
Full Text Available Method for generation pseudo-random series with arbitrarily assigned distribution law has been proposed. The praxis of using proposed method for generation pseudo-random series with anti-modal and approximate to Gaussian distribution law has been investigated.
Radyushkin, A. V.
2017-08-01
We show that quasi-parton distribution functions (quasi-PDFs) may be treated as hybrids of PDFs and primordial rest-frame momentum distributions of partons. This results in a complicated convolution nature of quasi-PDFs that necessitates using large p3≳3 GeV momenta to get reasonably close to the PDF limit. As an alternative approach, we propose using pseudo-PDFs P (x ,z32) that generalize the light-front PDFs onto spacelike intervals and are related to Ioffe-time distributions M (ν ,z32), the functions of the Ioffe time ν =p3z3 and the distance parameter z32 with respect to which it displays perturbative evolution for small z3. In this form, one may divide out the z32 dependence coming from the primordial rest-frame distribution and from the problematic factor due to lattice renormalization of the gauge link. The ν dependence remains intact and determines the shape of PDFs.
Damage Detection Based on Cross-Term Extraction from Bilinear Time-Frequency Distributions
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Ma Yuchao
2014-01-01
Full Text Available Abundant damage information is implicated in the bilinear time-frequency distribution of structural dynamic signals, which could provide effective support for structural damage identification. Signal time-frequency analysis methods are reviewed, and the characters of linear time-frequency distribution and bilinear time-frequency distribution typically represented by the Wigner-Ville distribution are compared. The existence of the cross-term and its application in structural damage detection are demonstrated. A method of extracting the dominant term is proposed, which combines the short-time Fourier spectrum and Wigner-Ville distribution; then two-dimensional time-frequency transformation matrix is constructed and the complete cross-term is extracted finally. The distribution character of which could be applied to the structural damage identification. Through theoretical analysis, model experiment and numerical simulation of the girder structure, the change rate of cross-term amplitude is validated to identify the damage location and degree. The effectiveness of the cross-term of bilinear time-frequency distribution for damage detection is confirmed and the analytical method of damage identification used in structural engineering is available.
RPD: Reusable Pseudo-Id Distribution for a Secure and Privacy Preserving VANET
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Sulaiman Ashraph
2013-08-01
Full Text Available In any VANET, security and privacy are the two fundamental issues. Obtaining efficient security in vehicular communication is essential without compromising privacy-preserving mechanisms. Designing a suitable protocol for VANET by having these two issues in mind is challenging because efficiency, unlinkablity and traceability are the three qualities having contradictions between them. In this paper, we introduce an efficient Reusable Pseudo-id Distribution (RPD scheme. The Trusted Authority (TA designating the Road Side Units (RSUs to generate n reusable pseudo ids and distribute them to the On Board Units (OBUs on request characterizes the proposed protocol. RSUs issue the aggregated hashes of all its valid pseudo-ids along with a symmetric shared key and a particular pseudo-id to each vehicle that enters into its coverage range. Through this the certificates attached to the messages can be eliminated and thus resulting in a significantly reduced packet size. The same anonymous keys can then be re-distributed by the RSUs episodically to other vehicles. We analyze the proposed protocol extensively to demonstrate its merits and efficiency.
A 3-14 GHz pseudo-differential distributed low noise amplifier
Hek, P. de; Caekenberghe, K. van; Dijk, R. van
2010-01-01
A 3-14 GHz pseudo-differential distributed low noise amplifier, henceforth referred to as the distributed amplifier (DA), is reported. The DA is realized in the WIN PL15-10 process, which is a 0.15 μm Al_{0.3}Ga _{0.7}As/In_{0.5}Ga_{0.5}As low-noise depletion-mode
Lattice QCD exploration of parton pseudo-distribution functions
Orginos, Kostas; Radyushkin, Anatoly; Karpie, Joseph; Zafeiropoulos, Savvas
2017-11-01
We demonstrate a new method of extracting parton distributions from lattice calculations. The starting idea is to treat the generic equal-time matrix element M (P z3,z32) as a function of the Ioffe time ν =P z3 and the distance z3. The next step is to divide M (P z3,z32) by the rest-frame density M (0 ,z32). Our lattice calculation shows a linear exponential z3-dependence in the rest-frame function, expected from the Z (z32) factor generated by the gauge link. Still, we observe that the ratio M (P z3,z32)/M (0 ,z32) has a Gaussian-type behavior with respect to z3 for 6 values of P used in the calculation. This means that Z (z32) factor was canceled in the ratio. When plotted as a function of ν and z3, the data are very close to z3-independent functions. This phenomenon corresponds to factorization of the x - and k⊥-dependence for the TMD F (x ,k⊥2). For small z3≤4 a , the residual z3-dependence is explained by perturbative evolution, with αs/π =0.1 .
EMD-WVD time-frequency distribution for analysis of multi-component signals
Chai, Yunzi; Zhang, Xudong
2016-10-01
Time-frequency distribution (TFD) is two-dimensional function that indicates the time-varying frequency content of one-dimensional signals. And The Wigner-Ville distribution (WVD) is an important and effective time-frequency analysis method. The WVD can efficiently show the characteristic of a mono-component signal. However, a major drawback is the extra cross-terms when multi-component signals are analyzed by WVD. In order to eliminating the cross-terms, we decompose signals into single frequency components - Intrinsic Mode Function (IMF) - by using the Empirical Mode decomposition (EMD) first, then use WVD to analyze each single IMF. In this paper, we define this new time-frequency distribution as EMD-WVD. And the experiment results show that the proposed time-frequency method can solve the cross-terms problem effectively and improve the accuracy of WVD time-frequency analysis.
Boeckxstaens, Guy E.; Rumessen, Jüri J.; de Wit, Laurens; Tytgat, Guido N. J.; Vanderwinden, Jean-Marie
2002-01-01
Interstitial cells of Cajal (ICC) are fundamental regulators of GI motility. Here, we report the manometrical abnormalities and abnormalities of ICC distribution and ultrastructure encountered in a 30-yr-old patient with megaduodenum and pseudo-obstruction. Full thickness biopsies taken during
Rabaey, D.; Huysmans, S.; Lens, F.; Smets, E.; Jansen, S.
2008-01-01
Recent studies on the functional significance of pit membranes in water conducting cells have renewed general interest in their micromorphology. At least two types of pit membrane thickenings have been described in angiosperm families, i.e. genuine tori and pseudo-tori. This study explores the
DEFF Research Database (Denmark)
Boeckxstaens, Guy E; Rumessen, Jüri J; de Wit, Laurens
2002-01-01
laparoscopic placement of a jejunostomy showed vacuolated myocytes and fibrosis predominantly in the outer third of the circular muscle layer of the duodenum, suggestive for visceral myopathy. The distribution of ICC was also strikingly abnormal: by light microscopy, ICC surrounding the myenteric plexus were...... lacking in the megaduodenum, whereas ICC were normally present in the duodenal circular muscle and in the jejunum. By electron microscopy, very few ICC were identified around the duodenal myenteric plexus. These findings suggest that abnormalities in ICC may contribute to the disturbed motility in some...... myopathic forms of intestinal pseudo-obstruction....
Development of Pseudo Autonomous Wireless Sensor Monitoring System for Water Distribution Network
Kondratjevs, K; Zabašta, A; Kuņicina, N; Ribickis, L
2014-01-01
Water distribution networks require long term autonomous monitoring solutions, integrated, reliable and cost effective data transfer methods. This paper investigates the data delivery infrastructure of water distribution network sensor equipment used for network monitoring and billing of the subscribers. Water distribution network usually apply sensors to measure water flow, pressure and temperature. The main goal is to offer a wireless sensor system architecture comprisi...
Directory of Open Access Journals (Sweden)
Sonia Quijano-Scheggia
2010-04-01
Full Text Available Proliferations of the genus Pseudo-nitzschia recur along the Catalan coast (NW Mediterranean throughout the year. The establishment of 58 clonal cultures facilitated morphological studies with scanning electron microscopy (SEM and ITS 5.8S rDNA sequence characterization. Moreover, strains of each species were examined with respect to sexual compatibility and toxicity. The results of the morphological and phylogenetic studies confirmed nine species of the genus Pseudo-nitzschia: P. brasiliana, P. calliantha, P. delicatissima clade A/del 2, P. arenysensis, P. fraudulenta, P. galaxiae, P. linea, P. multistriata and P. pungens clade I. Moreover, two Pseudo-nitzschia species, P. caciantha and P. cf mannii, could only be identified following SEM analysis of their morphology. None of the cultured strains of Pseudo-nitzschia analyzed produced domoic acid in amounts above the limit of detection. The current distributions of the Pseudo-nitzschia species in the Mediterranean Sea were plotted on maps, which led to the following observations: i diversity within this genus is much greater than previously considered, ii some species have a broad distribution (e.g. P. calliantha, iii whereas the distribution of others is narrowly restricted (e.g. P. pungens clade I. Moreover, this study reports the first detection of P. linea in the Mediterranean Sea and is the first description of P. galaxiae and P. cf mannii along the Catalan coast. Morphological studies coupled with molecular biological characterization, mating tests and biogeographic distribution analyses provide a critical theoretical basis for testing and/or implementing the current phylogenetic framework in the genus Pseudo-nitzschia.
Distribution of diatom Pseudo-nitzschia and dinoflagellates of Dinophysis spp along coast off Goa
Digital Repository Service at National Institute of Oceanography (India)
Alkawri, A.A.S.; Ramaiah, N.
, 32 (1) 65-70 (2011) © Triveni Enterprises, Lucknow (India) For personal use only Free paper downloaded from: www. jeb. co. in commercial distribution of this copy is illegal Journal of Environmental Biology circleshadowdwnJanuary 2011circleshadowdwn... attain high cell numbers. It is reasonable for us to therefore caution that the toxic species do prevail in these waters. Key words Toxic phytoplankton, Diatom, Dinoflagellates, West coast of India Publication Data Paper received: 07 December 2009...
Pseudo-Marginal Slice Sampling
Murray, Iain; Graham, Matthew
2015-01-01
Markov chain Monte Carlo (MCMC) methods asymptotically sample from complex probability distributions. The pseudo-marginal MCMC framework only requires an unbiased estimator of the unnormalized probability distribution function to construct a Markov chain. However, the resulting chains are harder to tune to a target distribution than conventional MCMC, and the types of updates available are limited. We describe a general way to clamp and update the random numbers used in a pseudo-marginal meth...
Brassard, Gilles; Broadbent, Anne; Tapp, Alain
2005-11-01
Quantum information processing is at the crossroads of physics, mathematics and computer science. It is concerned with that we can and cannot do with quantum information that goes beyond the abilities of classical information processing devices. Communication complexity is an area of classical computer science that aims at quantifying the amount of communication necessary to solve distributed computational problems. Quantum communication complexity uses quantum mechanics to reduce the amount of communication that would be classically required. Pseudo-telepathy is a surprising application of quantum information processing to communication complexity. Thanks to entanglement, perhaps the most nonclassical manifestation of quantum mechanics, two or more quantum players can accomplish a distributed task with no need for communication whatsoever, which would be an impossible feat for classical players. After a detailed overview of the principle and purpose of pseudo-telepathy, we present a survey of recent and no-so-recent work on the subject. In particular, we describe and analyse all the pseudo-telepathy games currently known to the authors.
Coste, Christophe; Gilles, Bruno
2010-01-01
We study sound propagation in a model granular medium, which is a triangular array of nominally identical spherical beads under isotropic stress. Because of the point-like nature of the contacts between the beads, the slightest polydispersity makes the lattice of effective contacts random. This randomness evolves with the overall stress applied on the boundaries, and we use detection of longitudinal burst waves, with gaussian envelope, as a probe for the medium. At low and moderate stress, the velocity dependency on the applied stress exhibits clear discrepancies with Hertzian behavior, which shows that the contact lattice is indeed random. Time-frequency analysis gives full access to the dispersion relation of the lattice, both for long and short waves. For long waves, the time-of-flight is shown to be identical to the group delay, as expected. This method also allows measurements for short waves, which probe small-scale heterogeneities in the contact lattice: At high stress, almost all possible contacts are effective, and time-of-flight measurements indicate almost perfect Hertzian behavior. Group delay measurements for short waves, on the contrary, reveal persistent small-scale disorder. We discuss in some details the algorithms used for time-frequency analysis (Wigner-Ville distributions, pseudo Wigner-Ville distributions, reassignment method).
Oh, Seok-Geun; Suh, Myoung-Seok
2017-07-01
The projection skills of five ensemble methods were analyzed according to simulation skills, training period, and ensemble members, using 198 sets of pseudo-simulation data (PSD) produced by random number generation assuming the simulated temperature of regional climate models. The PSD sets were classified into 18 categories according to the relative magnitude of bias, variance ratio, and correlation coefficient, where each category had 11 sets (including 1 truth set) with 50 samples. The ensemble methods used were as follows: equal weighted averaging without bias correction (EWA_NBC), EWA with bias correction (EWA_WBC), weighted ensemble averaging based on root mean square errors and correlation (WEA_RAC), WEA based on the Taylor score (WEA_Tay), and multivariate linear regression (Mul_Reg). The projection skills of the ensemble methods improved generally as compared with the best member for each category. However, their projection skills are significantly affected by the simulation skills of the ensemble member. The weighted ensemble methods showed better projection skills than non-weighted methods, in particular, for the PSD categories having systematic biases and various correlation coefficients. The EWA_NBC showed considerably lower projection skills than the other methods, in particular, for the PSD categories with systematic biases. Although Mul_Reg showed relatively good skills, it showed strong sensitivity to the PSD categories, training periods, and number of members. On the other hand, the WEA_Tay and WEA_RAC showed relatively superior skills in both the accuracy and reliability for all the sensitivity experiments. This indicates that WEA_Tay and WEA_RAC are applicable even for simulation data with systematic biases, a short training period, and a small number of ensemble members.
Steve P. Verrill; James W. Evans; David E. Kretschmann; Cherilyn A. Hatfield
2014-01-01
Two important wood properties are the modulus of elasticity (MOE) and the modulus of rupture (MOR). In the past, the statistical distribution of the MOE has often been modeled as Gaussian, and that of the MOR as lognormal or as a two- or three-parameter Weibull distribution. It is well known that MOE and MOR are positively correlated. To model the simultaneous behavior...
DEFF Research Database (Denmark)
Boeckxstaens, Guy E; Rumessen, Jüri J; de Wit, Laurens
2002-01-01
laparoscopic placement of a jejunostomy showed vacuolated myocytes and fibrosis predominantly in the outer third of the circular muscle layer of the duodenum, suggestive for visceral myopathy. The distribution of ICC was also strikingly abnormal: by light microscopy, ICC surrounding the myenteric plexus were...
Directory of Open Access Journals (Sweden)
Fernando Carreño
2015-11-01
Full Text Available Quetiapine is an atypical antipsychotic used to treat schizophrenia. However, despite great interest for its chronic therapeutic use, quetiapine has some important side effects such as weight gain induction. The development of a quetiapine nanocarrier can potentially target the drug into central nervous system, resulting in a reduction of systemic side effects and improved patient treatment. In the present work, a simple liquid chromatography/ultraviolet detection (LC/UV analytical method was developed and validated for quantification of total quetiapine content in lipid core nanocapsules as well as for determination of incorporation efficiency. An algorithm proposed by Oliveira et al. (2012 was applied to characterize the distribution of quetiapine in the pseudo-phases of the nanocarrier, leading to a better understanding of the quetiapine nanoparticles produced. The analytical methodology developed was specific, linear in the range of 0.5 to 100 µg mL−1 (r2 > 0,99, and accurate and precise (R.S.D < ±5%. The absolute recovery of quetiapine from the nanoparticles was approximately 98% with an incorporation efficiency of approximately 96%. The results indicated that quetiapine was present in a type III distribution according to the algorithm, and was mainly located in the core of the nanoparticle because of its logD in the formulation pH (6.86 ± 0.4.
Czech Academy of Sciences Publication Activity Database
Mesiar, Radko; Li, J.; Pap, E.
2013-01-01
Roč. 54, č. 3 (2013), s. 357-364 ISSN 0888-613X R&D Projects: GA ČR GAP402/11/0378 Institutional support: RVO:67985556 Keywords : concave integral * pseudo-addition * pseudo- multiplication Subject RIV: BA - General Mathematics Impact factor: 1.977, year: 2013 http://library.utia.cas.cz/separaty/2013/E/mesiar-discrete pseudo-integrals. pdf
Directory of Open Access Journals (Sweden)
Cangzhi Jia
2014-06-01
Full Text Available Protein S-nitrosylation is a reversible post-translational modification by covalent modification on the thiol group of cysteine residues by nitric oxide. Growing evidence shows that protein S-nitrosylation plays an important role in normal cellular function as well as in various pathophysiologic conditions. Because of the inherent chemical instability of the S-NO bond and the low abundance of endogenous S-nitrosylated proteins, the unambiguous identification of S-nitrosylation sites by commonly used proteomic approaches remains challenging. Therefore, computational prediction of S-nitrosylation sites has been considered as a powerful auxiliary tool. In this work, we mainly adopted an adapted normal distribution bi-profile Bayes (ANBPB feature extraction model to characterize the distinction of position-specific amino acids in 784 S-nitrosylated and 1568 non-S-nitrosylated peptide sequences. We developed a support vector machine prediction model, iSNO-ANBPB, by incorporating ANBPB with the Chou’s pseudo amino acid composition. In jackknife cross-validation experiments, iSNO-ANBPB yielded an accuracy of 65.39% and a Matthew’s correlation coefficient (MCC of 0.3014. When tested on an independent dataset, iSNO-ANBPB achieved an accuracy of 63.41% and a MCC of 0.2984, which are much higher than the values achieved by the existing predictors SNOSite, iSNO-PseAAC, the Li et al. algorithm, and iSNO-AAPair. On another training dataset, iSNO-ANBPB also outperformed GPS-SNO and iSNO-PseAAC in the 10-fold crossvalidation test.
Kim, Jin Ho; Park, Bum Soo; Kim, Joo-Hwan; Wang, Pengbin; Han, Myung-Soo
2015-02-01
Three clades of Pseudo-nitzschia pungens, determined by the internal transcribed space (ITS) region, are distributed throughout the world. We studied 15 P. pungens clones from various geographical locations and confirmed the existence of the three clades within P. pungens, based on ITS sequencing and described the three subgroups (IIIaa, IIIab, and IIIb) of clade III. Clade III (clade IIIaa) populations were reported for the first time in Korean coastal waters and the East China Sea. In morphometric analysis, we found the ultrastructural differences in the number of fibulae, striae, and poroids that separate the three clades. We carried out physiological tests on nine clones belonging to the three clades growing under various culture conditions. In temperature tests, only clade III clones could not grow at lower temperatures (10°C and 15°C), although clade I and II clones grew well. The estimated optimal growth range of clade I clones was wider than that of clades II and III. Clade II clones were considered to be adapted to lower temperatures and clade III to higher temperatures. In salinity tests, clade II and III clones did not grow well at a salinity of 40. Clade I clones were regarded as euryhaline and clade II and III clones were stenohaline. This supports the hypothesis that P. pungens clades have different ecophysiological characteristics based on their habitats. Our data show that physiological and morphological features are correlated with genetic intraspecific differentiation in P. pungens. © 2014 Phycological Society of America.
Vibration Signature Analysis of a Faulted Gear Transmission System
Choy, F. K.; Huang, S.; Zakrajsek, J. J.; Handschuh, R. F.; Townsend, D. P.
1996-01-01
A comprehensive procedure in predicting faults in gear transmission systems under normal operating conditions is presented. Experimental data were obtained from a spiral bevel gear fatigue test rig at NASA/Lewis. Time-synchronous-averaged vibration data were recorded throughout the test as the fault progressed from a small single pit to severe pitting over several teeth, and finally tooth fracture. A numerical procedure based on the Wigner-Ville distribution was used to examine the time-averaged vibration data. Results from the Wigner-Ville procedure are compared to results from a variety of signal analysis techniques that include time-domain analysis methods and frequency analysis methods. Using photographs of the gear tooth at various stages of damage, the limitations and accuracy of the various techniques are compared and discussed. Conclusions are drawn from the comparison of the different approaches as well as the applicability of the Wigner-Ville method in predicting gear faults.
Time-frequency analysis of the ECG in the diagnosis of vasovagal syndrome in older people.
Ebden, M J; Tarassenko, L; Payne, S J; Darowski, A; Price, J D
2004-01-01
The Smoothed Pseudo Wigner-Ville Distribution (SPWVD) is used for the time-frequency analysis of variations in RR interval. A novel technique to determine the smoothing window lengths is implemented, and a new heart rate variability (HRV) metric is developed, instantaneous center frequency variability (ICFV), which uses the time-frequency map generated by the SPWVD. The technique is then applied to 50 patients with unexplained falls and age > 60, undergoing head-upright tilt table testing (HUT). Eighteen of the patients were diagnosed with vasovagal syndrome. Attempts at syncope prediction using the new metric is an improvement on traditional techniques: an ICFV less than 0.07 Hz from 90 s to 180 s after tilt is predictive of a negative test (negative predictive value: 0.77). The comorbidity and autonomic degeneration present in elderly patients are thought to be responsible for lowering the negative predictive value.
National Research Council Canada - National Science Library
Al-Hummayani, Fadia M
2016-01-01
.... This case report represents a none traditional treatment modality to treat deep anterior crossbite in an adult pseudo class III malocclusion complicated by severely retruded, supraerupted upper and lower incisors...
DEFF Research Database (Denmark)
Hasle, Grethe Rytter; Lundholm, N.
2005-01-01
hymenate poroids. Within that clade, P. obtusa is most closely related to P. seriata and P. australis, which make up the sister group to P. obtusa. Pseudo-nitzschia obtusa is recorded from the Arctic regions of the Atlantic and the Pacific Oceans, whereas P. seriata is recorded from the Arctic...... and Temperate regions but only from the Atlantic Ocean. The relationship between P. obtusa and other morphologically and phylogenetically similar species of the genus is discussed. In growth studies under replete nutrient conditions, P. obtusa had a growth rate of 0.55-0.66 day-1 and an upper pH limit...... for growth of 9.1. No P. obtusa clones have yet been shown to produce the toxin, domoic acid....
POPULATION DYNAMICS OF PSEUDO-NITZSCHIA SPECIES ...
African Journals Online (AJOL)
nb
coastal waters of the Western Indian Ocean has been reported before (Bryceson ... Ocean. There is however no study, which has analyzed the seasonal distribution of. Pseudo-nitzschia species along the. Tanzanian coastal waters as well as factors regulating such ... cleaned plastic vials and immediately kept cool on ice for ...
DEFF Research Database (Denmark)
Pedersen, Erik Vesterlund; Jensen, Flemming; Shiryaev, Sergey Y.
1998-01-01
We have investigated the size distribution of germanium islands deposited onto a Si0.84Ge0.16 buffer layer, by atomic force microscopy. The size distribution was found to be bimodal at 630-740 degrees C and consisted of one group of smaller 'pyramidal' islands with a broad distribution of diameters...
Ota, Miho; Noda, Takamasa; Sato, Noriko; Hattori, Kotaro; Teraishi, Toshiya; Hori, Hiroaki; Nagashima, Anna; Shimoji, Keigo; Higuchi, Teruhiko; Kunugi, Hiroshi
2014-08-01
Most previous studies that examined regional cerebral blood flow (rCBF) abnormalities in major depressive disorder (MDD) required the injection of radioisotopes into subjects. Here by using magnetic resonance imaging (MRI) with the pseudo-continuous arterial spin labeling (pCASL) method which does not require radioisotopes, we examined rCBF in patients with MDD in comparison with that in patients with schizophrenia and healthy subjects, taking the regional cerebral gray matter volume into account. Subjects were 27 patients with MDD, 42 with schizophrenia and 43 healthy volunteers who underwent 3-T MRI with pCASL. Obtained pCASL imaging data were subject to the voxel-by-voxel statistical analysis. There were significant reductions of rCBF in the right inferior prefrontal cortex and anterior cingulate cortices (ACCs) in the MDD patients compared with the healthy controls. When compared with the schizophrenic patients, the MDD patients showed lower rCBF in the subgenual ACC and higher rCBF in left occipital region. The abnormalities of rCBF in MDD were known to reverse during symptom remission. Further study with follow-up period would bring the perception about the treatment response. The rCBF reduction in the subgenual region may be a specific functional abnormality to MDD patients, which may provide a biological marker for MDD. The MRI with pCASL method is a promising tool to detect rCBF abnormalities controlling for gray matter volume in psychiatric disorders. Copyright © 2014 Elsevier B.V. All rights reserved.
Energy Technology Data Exchange (ETDEWEB)
CHERTKOV, MICHAEL [Los Alamos National Laboratory; STEPANOV, MIKHAIL [Los Alamos National Laboratory
2007-01-10
The authors discuss performance of Low-Density-Parity-Check (LDPC) codes decoded by Linear Programming (LP) decoding at moderate and large Signal-to-Noise-Ratios (SNR). Frame-Error-Rate (FER) dependence on SNR and the noise space landscape of the coding/decoding scheme are analyzed by a combination of the previously introduced instanton/pseudo-codeword-search method and a new 'dendro' trick. To reduce complexity of the LP decoding for a code with high-degree checks, {ge} 5, they introduce its dendro-LDPC counterpart, that is the code performing identifically to the original one under Maximum-A-Posteriori (MAP) decoding but having reduced (down to three) check connectivity degree. Analyzing number of popular LDPC codes and their dendro versions performing over the Additive-White-Gaussian-Noise (AWGN) channel, they observed two qualitatively different regimes: (i) error-floor sets early, at relatively low SNR, and (ii) FER decays with SNR increase faster at moderate SNR than at the largest SNR. They explain these regimes in terms of the pseudo-codeword spectra of the codes.
Pseudo-differential operators and generalized functions
Toft, Joachim
2015-01-01
This book gathers peer-reviewed contributions representing modern trends in the theory of generalized functions and pseudo-differential operators. It is dedicated to Professor Michael Oberguggenberger (Innsbruck University, Austria) in honour of his 60th birthday. The topics covered were suggested by the ISAAC Group in Generalized Functions (GF) and the ISAAC Group in Pseudo-Differential Operators (IGPDO), which met at the 9th ISAAC congress in Krakow, Poland in August 2013. Topics include Columbeau algebras, ultra-distributions, partial differential equations, micro-local analysis, harmonic analysis, global analysis, geometry, quantization, mathematical physics, and time-frequency analysis. Featuring both essays and research articles, the book will be of great interest to graduate students and researchers working in analysis, PDE and mathematical physics, while also offering a valuable complement to the volumes on this topic previously published in the OT series.
Age bimodality in the central region of pseudo-bulges in S0 galaxies
Mishra, Preetish K.; Barway, Sudhanshu; Wadadekar, Yogesh
2017-11-01
We present evidence for bimodal stellar age distribution of pseudo-bulges of S0 galaxies as probed by the Dn(4000) index. We do not observe any bimodality in age distribution for pseudo-bulges in spiral galaxies. Our sample is flux limited and contains 2067 S0 and 2630 spiral galaxies drawn from the Sloan Digital Sky Survey. We identify pseudo-bulges in S0 and spiral galaxies, based on the position of the bulge on the Kormendy diagram and their central velocity dispersion. Dividing the pseudo-bulges of S0 galaxies into those containing old and young stellar populations, we study the connection between global star formation and pseudo-bulge age on the u - r colour-mass diagram. We find that most old pseudo-bulges are hosted by passive galaxies while majority of young bulges are hosted by galaxies that are star forming. Dividing our sample of S0 galaxies into early-type S0s and S0/a galaxies, we find that old pseudo-bulges are mainly hosted by early-type S0 galaxies while most of the pseudo-bulges in S0/a galaxies are young. We speculate that morphology plays a strong role in quenching of star formation in the disc of these S0 galaxies, which stops the growth of pseudo-bulges, giving rise to old pseudo-bulges and the observed age bimodality.
Romanholi, Daniella J.P.C.; SALGADO, Luiz Roberto
2007-01-01
Síndromes de pseudo-Cushing são um grupo heterogêneo de doenças, incluindo alcoolismo, anorexia nervosa, obesidade visceral e depressão, que compartilham muitas das características clínicas e bioquímicas da síndrome de Cushing. Os mecanismos responsáveis para a gênese da síndrome de pseudo-Cushing são fracamente compreendidos. Tem sido sugerido que o hipercortisolismo da síndrome de pseudo-Cushing pode ser resultante do aumento da secreção do hormônio liberador de corticotrofina (CRH) hipotal...
Directory of Open Access Journals (Sweden)
Yong Lin Liu
2014-01-01
Full Text Available A positive answer to the open problem of Iorgulescu on extending weak-R0 algebras and R0-algebras to the noncommutative forms is given. We show that pseudo-weak-R0 algebras are categorically isomorphic to pseudo-IMTL algebras and that pseudo-R0 algebras are categorically isomorphic to pseudo-NM algebras. Some properties, the noncommutative forms of the properties in weak-R0 algebras and R0-algebras, are investigated. The simplified axiom systems of pseudo-weak-R0 algebras and pseudo-R0 algebras are obtained.
Exending pseudo-arcs in odd characteristic
Penttila, Tim; Van de Voorde, Geertrui
2015-01-01
A {\\em pseudo-arc} in $\\mathrm{PG}(3n-1,q)$ is a set of $(n-1)$-spaces such that any three of them span the whole space. A pseudo-arc of size $q^n+1$ is a {\\em pseudo-oval}. If a pseudo-oval $\\mathcal{O}$ is obtained by applying field reduction to a conic in $\\mathrm{PG}(2,q^n)$, then $\\mathcal{O}$ is called a {\\em pseudo-conic}. We first explain the connection of (pseudo-)arcs with Laguerre planes, orthogonal arrays and generalised quadrangles. In particular, we prove that the Ahrens-Szekere...
Cyclostationarity approach for monitoring chatter and tool wear in high speed milling
Lamraoui, M.; Thomas, M.; El Badaoui, M.
2014-02-01
Detection of chatter and tool wear is crucial in the machining process and their monitoring is a key issue, for: (1) insuring better surface quality, (2) increasing productivity and (3) protecting both machines and safe workpiece. This paper presents an investigation of chatter and tool wear using the cyclostationary method to process the vibrations signals acquired from high speed milling. Experimental cutting tests were achieved on slot milling operation of aluminum alloy. The experimental set-up is designed for acquisition of accelerometer signals and encoding information picked up from an encoder. The encoder signal is used for re-sampling accelerometers signals in angular domain using a specific algorithm that was developed in LASPI laboratory. The use of cyclostationary on accelerometer signals has been applied for monitoring chatter and tool wear in high speed milling. The cyclostationarity appears on average properties (first order) of signals, on the energetic properties (second order) and it generates spectral lines at cyclic frequencies in spectral correlation. Angular power and kurtosis are used to analyze chatter phenomena. The formation of chatter is characterized by unstable, chaotic motion of the tool and strong anomalous fluctuations of cutting forces. Results show that stable machining generates only very few cyclostationary components of second order while chatter is strongly correlated to cyclostationary components of second order. By machining in the unstable region, chatter results in flat angular kurtosis and flat angular power, such as a pseudo (white) random signal with flat spectrum. Results reveal that spectral correlation and Wigner Ville spectrum or integrated Wigner Ville issued from second-order cyclostationary are an efficient parameter for the early diagnosis of faults in high speed machining, such as chatter, tool wear and bearings, compared to traditional stationary methods. Wigner Ville representation of the residual signal shows
Introduction to fractional and pseudo-differential equations with singular symbols
Umarov, Sabir
2015-01-01
The book systematically presents the theories of pseudo-differential operators with symbols singular in dual variables, fractional order derivatives, distributed and variable order fractional derivatives, random walk approximants, and applications of these theories to various initial and multi-point boundary value problems for pseudo-differential equations. Fractional Fokker-Planck-Kolmogorov equations associated with a large class of stochastic processes are presented. A complex version of the theory of pseudo-differential operators with meromorphic symbols based on the recently introduced complex Fourier transform is developed and applied for initial and boundary value problems for systems of complex differential and pseudo-differential equations.
SOUND AND VIBRATION SIGNAL ANALYSIS USING IMPROVED SHORT-TIME FOURIER REPRESENTATION
Directory of Open Access Journals (Sweden)
June-Yule Lee
2013-06-01
Full Text Available Time-frequency imaging provides a straightforward means to understanding machinery conditions. The methods of short-time Fourier transform (STFT, Wigner-Ville distribution (WVD and smooth-windowed Wigner-Ville distribution (SWWVD are applied to the condition monitoring of rotating machines. The sound and vibration signals of a rotating fan are tested, and time-frequency images are illustrated in terms of STFT, WVD and SWWVD. The results show that the resolution of STFT is low, and the resolution of WVD is high but with interference. To overcome the interference in the WVD image, a variable smooth-windowed weighting function is applied. The smoothing window function resulted in interference attenuation but also in reducing the concentration. The SWWVD is a compromise between STFT and WVD. The SWWVD exhibits better resolution than STFT and has less interference than WVD.
Pseudo-nitzschia pungens (Bacillariophyceae): A cosmopolitan species?
DEFF Research Database (Denmark)
Casteleyn, G; Chepurnov, VA; Leliaert, F
2007-01-01
Abstract Genetic, reproductive and morphological variation were studied in 193 global strains of the marine diatom species Pseudo-nitzschia pungens (Grunow ex Cleve) Hasle to assess potential intraspecific variation and biogeographic distribution patterns. Genetic differentiation between allo- an...... Zealand) and the NE Pacific (Washington State). Clade I thus appears to be globally distributed in temperate coastal areas and provides the first strong evidence to date for the global distribution of a biologically, genetically and morphologically defined diatom species.......Abstract Genetic, reproductive and morphological variation were studied in 193 global strains of the marine diatom species Pseudo-nitzschia pungens (Grunow ex Cleve) Hasle to assess potential intraspecific variation and biogeographic distribution patterns. Genetic differentiation between allo...
Epilepsy Classification Framework Utilizing Joint Time-Frequency Signal Analysis and Processing
Directory of Open Access Journals (Sweden)
Shiva KHOSHNOUD
2015-06-01
Full Text Available Time Frequency Signal Analysis and Processing (TFSAP have been proposed in order to analyse the signal in both the time and the frequency domains. Electroencephalography (EEG as a time-varying frequency signal is an interesting field in which Time Frequency Distribution (TFD could be used in order to visualize the simultaneous distributions of signal energy in different physiological and pathological brain states. Particularly, epileptic signals due to their great features of seizure activity are introduced as the most attractive research field among researchers. This study outlines an investigation on two main pathologic brain states including, pre-ictal activity and seizure activity compared to normal activity. Pseudo-Wigner -Ville and Choi-William distributions are used in order to visualize the energy content of signals in these states. Different segments of brain electrical activity are analyzed using these distributions. Finally, Renyi’s entropy as an important characteristic which offer insight towards the EEG signal processing has been extracted from TFDs. The results obtained indicate that Renyi’s entropy is a high-quality discriminative feature especially in alpha and delta sub-bands of the EEG signal.
Flights in a pseudo-chaotic system.
Lowenstein, J H; Vivaldi, F
2011-09-01
We consider the problem of transport in a one-parameter family of piecewise rotations of the torus, for rotation number approaching 1∕4. This is a zero-entropy system which in this limit exhibits a divided phase space, with island chains immersed in a "pseudo-chaotic" region. We identify a novel mechanism for long-range transport, namely the adiabatic destruction of accelerator-mode islands. This process originates from the approximate translational invariance of the phase space and leads to long flights of linear motion, for a significant measure of initial conditions. We show that the asymptotic probability distribution of the flight lengths is determined by the geometric properties of a partition of the accelerator-mode island associated with the flight. We establish the existence of flights travelling distances of order O(1) in phase space. We provide evidence for the existence of a scattering process that connects flights travelling in opposite directions.
An Improved Time-Frequency Analysis Method in Interference Detection for GNSS Receivers.
Sun, Kewen; Jin, Tian; Yang, Dongkai
2015-04-21
In this paper, an improved joint time-frequency (TF) analysis method based on a reassigned smoothed pseudo Wigner-Ville distribution (RSPWVD) has been proposed in interference detection for Global Navigation Satellite System (GNSS) receivers. In the RSPWVD, the two-dimensional low-pass filtering smoothing function is introduced to eliminate the cross-terms present in the quadratic TF distribution, and at the same time, the reassignment method is adopted to improve the TF concentration properties of the auto-terms of the signal components. This proposed interference detection method is evaluated by experiments on GPS L1 signals in the disturbing scenarios compared to the state-of-the-art interference detection approaches. The analysis results show that the proposed interference detection technique effectively overcomes the cross-terms problem and also preserves good TF localization properties, which has been proven to be effective and valid to enhance the interference detection performance of the GNSS receivers, particularly in the jamming environments.
Pseudo random signal processing theory and application
Zepernick, Hans-Jurgen
2013-01-01
In recent years, pseudo random signal processing has proven to be a critical enabler of modern communication, information, security and measurement systems. The signal's pseudo random, noise-like properties make it vitally important as a tool for protecting against interference, alleviating multipath propagation and allowing the potential of sharing bandwidth with other users. Taking a practical approach to the topic, this text provides a comprehensive and systematic guide to understanding and using pseudo random signals. Covering theoretical principles, design methodologies and applications
Pseudo-complex general relativity
Hess, Peter O; Greiner, Walter
2016-01-01
This volume presents an pseudo-complex extension of General Relativity which addresses these issues and presents proposals for experimental examinations in strong fields near a large mass. General Relativity is a beautiful and well tested theory of gravitation. Nevertheless, it implies conceptual problems like the creation of singularities (Black Holes) as a result of the collapse of large masses, or the appearance of event horizons which exclude parts of the space-time from the observation of external observers. The mathematical and geometrical foundations of this extension are displayed in detail, and applications including orbits and accretion disks around large central masses, neutron stars or cosmological models are introduced. Calculations both for classical and extended applications are often executed in the form of problems with extensive solutions, which makes this volume also a valuable resource for any student of General Relativity.
Acroangiodermatitis (Pseudo-Kaposi sarcoma
Directory of Open Access Journals (Sweden)
Satyendra Kumar Singh
2014-01-01
Full Text Available Acroangiodermatitis or Pseudo-Kaposi sarcoma is a rare angioproliferative entity, related to chronic venous insufficiency or certain other vascular anomalies. It is often associated with chronic venous insufficiency, arteriovenous malformation of the legs, chronic renal failure treated with dialysis, paralyzed legs and amputation stumps. We hereby describe a case of 45 year old female presenting with pitting pedal edema, multiple ulcers over bilateral lower limbs with irregular margins with erythema and hyperpigmentation of the surrounding skin. Color Doppler study of bilateral lower limbs was normal. Histopathological examination from one of the lesions showed hyperplastic epidermis, proliferation of capillaries in dermis, hemosiderin deposits and lymphocytic infiltrate. These features thus confirmed the diagnosis of Acroangiodermatitis.
Tranulis, C; Durand, L G; Senhadji, L; Pibarot, P
2002-03-01
The objective of the study was to develop a non-invasive method for the estimation of pulmonary arterial pressure (PAP) using a neural network (NN) and features extracted from the second heart sound (S2). To obtain the information required to train and test the NN, an animal model of pulmonary hypertension (PHT) was developed, and nine pigs were investigated. During the experiments, the electrocardiogram, phonocardiogram and PAP were recorded. Subsequently, between 15 and 50 S2 heart sounds were isolated for each PAP stage and for each animal studied. A Coiflet wavelet decomposition and a pseudo smoothed Wigner-Ville distribution were used to extract features from the S2 sounds and train a one-hidden-layer NN using two-thirds of the data. The NN performance was tested on the remaining one-third of the data. NN estimates of the systolic and mean PAPs were obtained for each S2 and then ensemble averaged over the 15-50 S2 sounds selected for each PAP stage. The standard errors between the mean and systolic PAPs estimated by the NN and those measured with a catheter were 6.0 mmHg and 8.4 mmHg, respectively, and the correlation coefficients were 0.89 and 0.86, respectively. The classification accuracy, using 23 mmHg mean PAP and 30 mmHg systolic PAP thresholds between normal PAP and PHT, was 97% and 91%, respectively.
Tranulis, Constantin; Durand, Louis-Gilles; Senhadji, Lotfi; Pibarot, Philippe
2002-01-01
The objective of this study was to develop a non-invasive method for the estimation of pulmonary arterial pressure (PAP) using a neural network (NN) and features extracted from the second heart sound (S2). To obtain the information required to train and test the NN, an animal model of pulmonary hypertension (PHT) was developed and 9 pigs were investigated. During the experiments, the electrocardiogram, the phonocardiogram, and the PAP were recorded. Subsequently, between 15 and 50 S2 were isolated for each PAP stage and for each animal studied. A Coiflet wavelet decomposition and a pseudo smoothed Wigner-Ville distribution were used to extract features from the S2 and train a one-hidden layer NN using 2/3 of the data. The NN performance was tested on the remaining 1/3 of the data. NN estimates of the systolic and mean PAPs were obtained for each S2 and then ensemble averaged over the 15 to 50 S2 selected for each PAP stage. The standard errors between the mean and systolic PAPs estimated by the NN and those measured with a catheter were of 6.0 mmHg and 8.4 mmHg, respectively, and the correlation coefficients were 0.89 and 0.86, respectively. The classification accuracy, using a 23 mmHg mean PAP and a 30 mmHg systolic PAP thresholds between normal PAP and PHT was 97% and 91% respectively. PMID:12043802
Directory of Open Access Journals (Sweden)
Liang Hua
2015-01-01
Full Text Available Automatic extraction of time-frequency spectral image of mechanical faults can be achieved and faults can be identified consequently when rotating machinery spectral image processing technology is applied to fault diagnosis, which is an advantage. Acquired mechanical vibration signals can be converted into color time-frequency spectrum images by the processing of pseudo Wigner-Ville distribution. Then a feature extraction method based on quaternion invariant moment was proposed, combining image processing technology and multiweight neural network technology. The paper adopted quaternion invariant moment feature extraction method and gray level-gradient cooccurrence matrix feature extraction method and combined them with geometric learning algorithm and probabilistic neural network algorithm, respectively, and compared the recognition rates of rolling bearing faults. The experimental results show that the recognition rates of quaternion invariant moment are higher than gray level-gradient cooccurrence matrix in the same recognition method. The recognition rates of geometric learning algorithm are higher than probabilistic neural network algorithm in the same feature extraction method. So the method based on quaternion invariant moment geometric learning and multiweight neural network is superior. What is more, this algorithm has preferable generalization performance under the condition of fewer samples, and it has practical value and acceptation on the field of fault diagnosis for rotating machinery as well.
POPULATION DYNAMICS OF PSEUDO-NITZSCHIA SPECIES ...
African Journals Online (AJOL)
nb
ABSTRACT. The genus Pseudo-nitzschia is a chain-forming diatom comprising about 30 species some of which are known to produce domoic acid (DA) that causes amnesic shellfish poisoning (ASP). The current study aimed at assessing the population dynamics of Pseudo-nitzschia in the near shore waters of Dar es ...
Population dynamics of Pseudo-nitzschia species ...
African Journals Online (AJOL)
The genus Pseudo-nitzschia is a chain-forming diatom comprising about 30 species some of which are known to produce domoic acid (DA) that causes amnesic shellfish poisoning (ASP). The current study aimed at assessing the population dynamics of Pseudo-nitzschia in the near shore waters of Dar es Salaam. Samples ...
Subadditive functions and their (pseudo-)inverses
DEFF Research Database (Denmark)
Østerdal, Lars Peter
2006-01-01
The paper considers non-negative increasing functions on intervals with left endpoint closed at zero and investigates the duality between subadditivity and superadditivity via the inverse function and pseudo-inverses......The paper considers non-negative increasing functions on intervals with left endpoint closed at zero and investigates the duality between subadditivity and superadditivity via the inverse function and pseudo-inverses...
Pseudo-Haptic Feedback in Teleoperation.
Neupert, Carsten; Matich, Sebastian; Scherping, Nick; Kupnik, Mario; Werthschutzky, Roland; Hatzfeld, Christian
2016-01-01
In this paper, we develop possible realizations of pseudo-haptic feedback in teleoperation systems based on existing works for pseudo-haptic feedback in virtual reality and the intended applications. We derive four potential factors affecting the performance of haptic feedback (calculation operator, maximum displacement, offset force, and scaling factor), which are analyzed in three compliance identification experiments. First, we analyze the principle usability of pseudo-haptic feedback by comparing information transfer measures for teleoperation and direct interaction. Pseudo-haptic interaction yields well above-chance performance, while direct interaction performs almost perfectly. In order to optimize pseudo-haptic feedback, in the second study we perform a full-factorial experimental design with 36 subjects performing 6,480 trials with 36 different treatments. Information transfer ranges from 0.68 bit to 1.72 bit in a task with a theoretical maximum of 2.6 bit, with a predominant effect of the calculation operator and a minor effect of the maximum displacement. In a third study, short- and long-term learning effects are analyzed. Learning effects regarding the performance of pseudo-haptic feedback cannot be observed for single-day experiments. Tests over 10 days show a maximum increase in information transfer of 0.8 bit. The results show the feasibility of pseudo-haptic feedback for teleoperation and can be used as design basis for task-specific systems.
Pseudo-periodic partitions of biological sequences.
Li, Lugang; Jin, Renchao; Kok, Poh-Lin; Wan, Honghui
2004-02-12
Algorithm development for finding typical patterns in sequences, especially multiple pseudo-repeats (pseudo-periodic regions), is at the core of many problems arising in biological sequence and structure analysis. In fact, one of the most significant features of biological sequences is their high quasi-repetitiveness. Variation in the quasi-repetitiveness of genomic and proteomic texts demonstrates the presence and density of different biologically important information. It is very important to develop sensitive automatic computational methods for the identification of pseudo-periodic regions of sequences through which we can infer, describe and understand biological properties, and seek precise molecular details of biological structures, dynamics, interactions and evolution. We develop a novel, powerful computational tool for partitioning a sequence to pseudo-periodic regions. The pseudo-periodic partition is defined as a partition, which intuitively has the minimal bias to some perfect-periodic partition of the sequence based on the evolutionary distance. We devise a quadratic time and space algorithm for detecting a pseudo-periodic partition for a given sequence, which actually corresponds to the shortest path in the main diagonal of the directed (acyclic) weighted graph constructed by the Smith-Waterman self-alignment of the sequence. We use several typical examples to demonstrate the utilization of our algorithm and software system in detecting functional or structural domains and regions of proteins. A big advantage of our software program is that there is a parameter, the granularity factor, associated with it and we can freely choose a biological sequence family as a training set to determine the best parameter. In general, we choose all repeats (including many pseudo-repeats) in the SWISS-PROT amino acid sequence database as a typical training set. We show that the granularity factor is 0.52 and the average agreement accuracy of pseudo-periodic partitions
Chronic intestinal pseudo-obstruction in a dog: case report
Directory of Open Access Journals (Sweden)
A.L. Bicalho
2011-12-01
Full Text Available Intestinal pseudo-obstruction is a rare disorder that affects gastrointestinal propulsion. It may be secondary to several pathological conditions or it may develop without a known cause. A 1.2 year-old intact Pug bitch had a history of vomiting and constipation, which were followed by diarrhea and distended abdomen. Hypomotility and dilation of the small intestine, which was filled with gas, were observed during laparotomy. Histologically, full thickness biopsy specimens demonstrated a severe loss and degeneration of leiomyocytes in the inner and outer muscular layers of the intestinal wall, whereas there was a marked hypertrophy and hyperplasia of smooth muscle cells in the lamina propria, and extremely thickened muscularis mucosae arranged in bundles oriented in different directions with marked hypertrophy and hyperplasia of leiomyocytes. Distribution of leiomyocytes was further characterized by immunohistochemistry. These findings support the diagnosis of intestinal pseudo-obstruction in a Pug, associated with degeneration and loss of leiomyocytes in the muscular layer.
Families of quasi-pseudo-metrics generated by probabilistic quasi-pseudo-metric spaces
Directory of Open Access Journals (Sweden)
Mariusz T. Grabiec
2008-03-01
Full Text Available This paper contains a study of families of quasi-pseudo-metrics (the concept of a quasi-pseudo-metric was introduced by Wilson (1931 , Albert (1941 and Kelly (1963 generated by probabilistic quasi-pseudo-metric-spaces which are generalization of probabilistic metric space (PM-space shortly [2, 3, 4, 6]. The idea of PM-spaces was introduced by Menger (1942, 1951, Schweizer and Sklar (1983 and Serstnev (1965. Families of pseudo-metrics generated by PM-spaces and those generalizing PM-spaces have been described by Stevens (1968 and Nishiure (1970.
Group Constants Generation of the Pseudo Fission Products for Fast Reactor Burnup Calculations
Gil, Choong-Sup; Kim, Do Heon; Chang, Jonghwa
2005-05-01
The pseudo fission products for the burnup calculations of the liquid metal fast reactor were generated. The cross-section data and fission product yield data of ENDF/B-VI were used for the pseudo fission product data of U-235, U-238, Pu-239, Pu-240, Pu-241, and Pu-242. The pseudo fission product data can be used with the KAFAX-F22 or -E66, which are the MATXS-format libraries for analyses of the liquid metal fast reactor at KAERI and were distributed through the OECD/NEA. The 80-group MATXS-format libraries of the 172 fission products were generated and the burnup chains for generation of the pseudo fission products were prepared.
On asymptotic normality of pseudo likelihood estimates for pairwise interaction processes
DEFF Research Database (Denmark)
Jensen, Jens Ledet; Künsch, Hans R.
1994-01-01
We consider point processes defined through a pairwise interaction potential and admitting a two-dimensional sufficient statistic. It is shown that the pseudo maximum likelihood estimate can be stochastically normed so that the limiting distribution is a standard normal distribution. This result ...... Mathematics....
Pseudo-capacitor device for aqueous electrolytes
Prakash, J.; Thackeray, M.M.; Dees, D.W.; Vissers, D.R.; Myles, K.M.
1998-11-24
A pseudo-capacitor having a high energy storage capacity develops a double layer capacitance as well as a Faradaic or battery-like redox reaction, also referred to as pseudo-capacitance. The Faradaic reaction gives rise to a capacitance much greater than that of the typical ruthenate oxide ultracapacitor which develops only charge separation-based double layer capacitance. The capacitor employs a lead and/or bismuth/ruthenate and/or iridium system having the formula A{sub 2}[B{sub 2{minus}x}Pb{sub x}]O{sub 7{minus}y}, where A=Pb, Bi, and B=Ru, Ir, and O
Aerodynamics of the pseudo-glottis.
Kotby, M N; Hegazi, M A; Kamal, I; Gamal El Dien, N; Nassar, J
2009-01-01
The aim of this work is to study the hitherto unclear aerodynamic parameters of the pseudo-glottis following total laryngectomy. These parameters include airflow rate, sub-pseudo-glottic pressure (SubPsG), efficiency and resistance, as well as sound pressure level (SPL). Eighteen male patients who have undergone total laryngectomy, with an age range from 54 to 72 years, were investigated in this study. All tested patients were fluent esophageal 'voice' speakers utilizing tracheo-esophageal prosthesis. The airflow rate, SubPsG and SPL were measured. The results showed that the mean value of the airflow rate was 53 ml/s, the SubPsG pressure was 13 cm H(2)O, while the SPL was 66 dB. The normative data obtained from the true glottis in healthy age-matched subjects are 89 ml/s, 7.9 cm H(2)O and 70 dB, respectively. Other aerodynamic indices were calculated and compared to the data obtained from the true glottis. Such a comparison of the pseudo-glottic aerodynamic data to the data of the true glottis gives an insight into the mechanism of action of the pseudo-glottis. The data obtained suggests possible clinical applications in pseudo-voice training. Copyright 2009 S. Karger AG, Basel.
SEARCHING FOR LOW WEIGHT PSEUDO-CODEWORDS
Energy Technology Data Exchange (ETDEWEB)
CHERTKOV, MICHAEL [Los Alamos National Laboratory; STEPANOV, MIKHAIL [Los Alamos National Laboratory
2007-01-23
Belief Propagation (BP) and Linear Programming (LP) decodings of LDPC codes are discussed. The authors summarize results of instanton/pseudo-codeword approach developed for analysis of the error-floor domain of the codes. Instantons are special, code and decoding specific, configurations of the channel noise contributing most to the Frame-Error-Rate (FER). Instantons are decoded into pseudo-codewords. Instanton/pseudo-codeword with the lowest weight describes the largest Signal-to-Noise-Ratio (SNR) asymptotic of FER, while the whole spectra of the low weight instantons is descriptive of the FER vs. SNR profile in the extended error-floor domain. First, they describe a general optimization method that allows to find the instantons for any coding/decoding. Second, they introduce LP-specific pseudo-codeword search algorithm that allows efficient calculations of the pseudo-codeword spectra. Finally, they discuss results of combined BP/LP error-floor exploration experiments for two mode codes.
Pseudo exchange bias due to rotational anisotropy
Energy Technology Data Exchange (ETDEWEB)
Ehrmann, A., E-mail: andrea.ehrmann@fh-bielefeld.de [Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld (Germany); Komraus, S.; Blachowicz, T.; Domino, K. [Institute of Physics – Center for Science and Education, Silesian University of Technology, 44-100 Gliwice (Poland); Nees, M.K.; Jakobs, P.J.; Leiste, H. [Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen (Germany); Mathes, M.; Schaarschmidt, M. [ACCESS e. V., 57072 Aachen (Germany)
2016-08-15
Ferromagnetic nanostructure arrays with particle dimensions between 160 nm and 400 nm were created by electron-beam lithography. The permalloy structures consist of rectangular-shaped walls around a square open space. While measuring their magnetic properties using the Magneto-Optical Kerr Effect (MOKE), in some angular regions an exchange bias (EB) seemed to appear. This paper gives an overview of possible reasons for this “pseudo exchange bias” and shows experimentally and by means of micromagnetic simulations that this effect can be attributed to unintentionally measuring minor loops. - Highlights: • Pseudo exchange bias can be found in square Py nanorings of different dimensions. • Pseudo exchange bias stems from unintentionally measuring minor loops. • New approach in explaining “real” exchange bias effect in coupled FM/AFM systems. • Theoretical base to explain other measurements of a rotational anisotropy.
A pseudo-matched filter for chaos
Cohen, Seth D.; Gauthier, Daniel J.
2012-01-01
A matched filter maximizes the signal-to-noise ratio of a signal. In the recent work of Corron et al. [Chaos 20, 023123 (2010)], a matched filter is derived for the chaotic waveforms produced by a piecewise-linear system. Motivated by these results, we describe a pseudo-matched filter, which removes noise from the same chaotic signal. It consists of a notch filter followed by a first-order, low-pass filter. We compare quantitatively the matched filter's performance to that of our pseudo-match...
A case of Pseudo-Bartter syndrome
Energy Technology Data Exchange (ETDEWEB)
Yang, Ik; Choi, Bo Whan; Lee, Yul; Chung, Soo Young [College of Medicine, Hallym University, Seoul (Korea, Republic of)
1994-10-15
Pseudo-Bartter Syndrome is a rare medical disease of the kidney characterized by normal blood pressure, hypokalemic metabolic alkalosis, hyperreninemia and hyperaldosteronism with drug history of diuretics. We report US, CT and MRI findings of a patients with clinically proved Pseudo-Bartter syndrome. The patient was a 37 year old woman with a history of long term ingestion of the diuretics(furosemide) for 20 years. Renal US revealed hyperechoic renal medulla at both kidneys. The resistive index(RI), calculated from the duplex doppler waveform is 0.61. Unenhanced CT revealed faint high attenuation along the medulla. T1-weighted MRI revealed indistinct corticomedullary differentiation.
Some Properties of Weighted Pseudo almost Periodic Functions
Directory of Open Access Journals (Sweden)
Zhe-Ming Zheng
2013-01-01
Full Text Available Several interesting and new properties of weighted pseudo almost periodic functions are established. Firstly, we obtain an equivalent definition for weighted pseudo almost periodic functions, which shows a close relationship between asymptotically almost periodic functions and weighted pseudo almost periodic functions; secondly, we prove that the space of asymptotically almost periodic functions is always a proper subspace of the space of weighted pseudo almost periodic functions; thirdly, we show that under some cases, the space of weighted pseudo almost periodic functions equals the classical space of pseudo almost periodic functions.
Pseudo--Normals for Signed Distance Computation
DEFF Research Database (Denmark)
Aanæs, Henrik; Bærentzen, Jakob Andreas
2003-01-01
undertake showing that the angle weighted pseudo--normal has an important property, namely that it allows us to discriminate between points that are inside and points that are outside the mesh. This result is used for proposing a simple and efficient algorithm for computing the signed distance field from...
A pseudo-matched filter for chaos.
Cohen, Seth D; Gauthier, Daniel J
2012-09-01
A matched filter maximizes the signal-to-noise ratio of a signal. In the recent work of Corron et al. [Chaos 20, 023123 (2010)], a matched filter is derived for the chaotic waveforms produced by a piecewise-linear system. This system produces a readily available binary symbolic dynamics that can be used to perform correlations in the presence of large amounts of noise using the matched filter. Motivated by these results, we describe a pseudo-matched filter, which operates similarly to the original matched filter. It consists of a notch filter followed by a first-order, low-pass filter. We compare quantitatively the matched filter's performance to that of our pseudo-matched filter using correlation functions. On average, the pseudo-matched filter performs with a correlation signal-to-noise ratio that is 2.0 dB below that of the matched filter. Our pseudo-matched filter, though somewhat inferior in comparison to the matched filter, is easily realizable at high speed (>1 GHz) for potential radar applications.
Pseudo-Canonical Formulae are Classical
Directory of Open Access Journals (Sweden)
Caminati Marco B.
2015-02-01
Full Text Available An original result about Hilbert Positive Propositional Calculus introduced in [11] is proven. That is, it is shown that the pseudo-canonical formulae of that calculus (and hence also the canonical ones, see [17] are a subset of the classical tautologies.
Pseudo-observations in survival analysis
DEFF Research Database (Denmark)
Andersen, Per Kragh; Perme, Maja Pohar
2010-01-01
-state models, e.g. the competing risks cumulative incidence function. Graphical and numerical methods for assessing goodness-of-fit for hazard regression models and for the Fine-Gray model in competing risks studies based on pseudo-observations are also reviewed. Sensitivity to covariate-dependent censoring...... is studied. The methods are illustrated using a data set from bone marrow transplantation....
Primary palpebral and orbital ossification in pseudo-pseudohypoparathyroidism
DEFF Research Database (Denmark)
Klauber, S.; Heegaard, S.; Prause, J.U.
2002-01-01
ophthalmology, Albright's heriditary osteodystrophy, ossification, pseudo-pseudohypoparathyroidism, pseodohypoparathyroidism, hypothyroidism, GNAS1 gene, history, eyelid, orbit......ophthalmology, Albright's heriditary osteodystrophy, ossification, pseudo-pseudohypoparathyroidism, pseodohypoparathyroidism, hypothyroidism, GNAS1 gene, history, eyelid, orbit...
Directory of Open Access Journals (Sweden)
Sonia Quijano-Scheggia
2008-09-01
Full Text Available The spatial and temporal variations in the composition of Pseudo-nitzschia during bloom events from August 2005 to February 2006 were characterised in two bays of the NW Mediterranean Sea (Alfacs and Fangar Bay by means of scanning electron microscopy (SEM. The study provides detailed records of the Pseudo-nitzschia community at the species level and describes its relationship with both the surrounding environmental conditions and biotic factors such as the accompanying phytoplankton community. The size distributions of several species of Pseudo-nitzschia were monitored during the bloom events. These measurements may serve as indicators of the physiological status of the cells. The species observed in the two bays were Pseudo-nitzschia calliantha, P. delicatissima, P. fraudulenta, P. multistriata, and P. pungens. In Alfacs Bay, a mixed species bloom of P. calliantha and P. delicatissima began in late August 2005 and lasted 11 weeks. In Fangar Bay, the Pseudo-nitzschia bloom was limited to the period from early August to late September 2005 and comprised P. calliantha and P. delicatissima. Commonly, the proliferation of Pseudo-nitzschia was mono-specific or was accompanied by other diatoms. Two objectively defined groups were identified by the statistical analysis in Alfacs bay; the first was made up only of winter samples and the second of summer and autumn samples. The first group was defined by a high concentration of NO3¯ and low concentrations of NH4+, conditions associated with a high abundance of P. delicatissima and a low abundance of P. calliantha. The second group expressed the opposite characteristics. A succession of different blooming species of Pseudo-nitzschia lasting months in Alfacs Bay is described.
Wavefield extrapolation in pseudo-depth domain
Ma, Xuxin
2012-01-01
Extrapolating seismic waves in Cartesian coordinate is prone to uneven spatial sampling, because the seismic wavelength tends to grow with depth, as velocity increase. We transform the vertical depth axis to a pseudo one using a velocity weighted mapping, which can effectively mitigate this wavelength variation. We derive acoustic wave equations in this new domain based on the direct transformation of the Laplacian derivatives, which admits solutions that are more accurate and stable than those derived from the kinematic transformation. The anisotropic versions of these equations allow us to isolate the vertical velocity influence and reduce its impact on modeling and imaging. The major benefit of extrapolating wavefields in pseudo-depth space is its near uniform wavelength as opposed to the normally dramatic change of wavelength with the conventional approach. Time wavefield extrapolation on a complex velocity shows some of the features of this approach.
Inflation and pseudo-Goldstone Higgs boson
DEFF Research Database (Denmark)
Alanne, Tommi; Sannino, Francesco; Tenkanen, Tommi
2017-01-01
We consider inflation within a model framework where the Higgs boson arises as a pseudo-Goldstone boson associated with the breaking of a global symmetry at a scale significantly larger than the electroweak one. We show that in such a model the scalar self-couplings can be parametrically suppressed...... field. Our model therefore suggests that inflation and low energy particle phenomenology may be more entwined than assumed so far....
Pseudo-Hermitian random matrix theory
Srivastava, S. C. L.; Jain, S. R.
2013-02-01
Complex extension of quantum mechanics and the discovery of pseudo-unitarily invariant random matrix theory has set the stage for a number of applications of these concepts in physics. We briefly review the basic ideas and present applications to problems in statistical mechanics where new results have become possible. We have found it important to mention the precise directions where advances could be made if further results become available.
Pseudo-Hermitian random matrix theory
Srivastava, Shashi C. L.; Jain, S. R.
2013-01-01
Complex extension of quantum mechanics and the discovery of pseudo-unitarily invariant random matrix theory has set the stage for a number of applications of these concepts in physics. We briefly review the basic ideas and present applications to problems in statistical mechanics where new results have become possible. We have found it important to mention the precise directions where advances could be made if further results become available.
Binary Classification with a Pseudo Exponential Model and Its Application for Multi-Task Learning
Directory of Open Access Journals (Sweden)
Takashi Takenouchi
2015-08-01
Full Text Available In this paper, we investigate the basic properties of binary classification with a pseudo model based on the Itakura–Saito distance and reveal that the Itakura–Saito distance is a unique appropriate measure for estimation with the pseudo model in the framework of general Bregman divergence. Furthermore, we propose a novelmulti-task learning algorithm based on the pseudo model in the framework of the ensemble learning method. We focus on a specific setting of the multi-task learning for binary classification problems. The set of features is assumed to be common among all tasks, which are our targets of performance improvement. We consider a situation where the shared structures among the dataset are represented by divergence between underlying distributions associated with multiple tasks. We discuss statistical properties of the proposed method and investigate the validity of the proposed method with numerical experiments.
Wavefield Extrapolation in Pseudo-depth Domain
Ma, Xuxin
2011-12-11
Wave-equation based seismic migration and inversion tools are widely used by the energy industry to explore hydrocarbon and mineral resources. By design, most of these techniques simulate wave propagation in a space domain with the vertical axis being depth measured from the surface. Vertical depth is popular because it is a straightforward mapping of the subsurface space. It is, however, not computationally cost-effective because the wavelength changes with local elastic wave velocity, which in general increases with depth in the Earth. As a result, the sampling per wavelength also increases with depth. To avoid spatial aliasing in deep fast media, the seismic wave is oversampled in shallow slow media and therefore increase the total computation cost. This issue is effectively tackled by using the vertical time axis instead of vertical depth. This is because in a vertical time representation, the "wavelength" is essentially time period for vertical rays. This thesis extends the vertical time axis to the pseudo-depth axis, which features distance unit while preserving the properties of the vertical time representation. To explore the potentials of doing wave-equation based imaging in the pseudo-depth domain, a Partial Differential Equation (PDE) is derived to describe acoustic wave in this new domain. This new PDE is inherently anisotropic because the use of a constant vertical velocity to convert between depth and vertical time. Such anisotropy results in lower reflection coefficients compared with conventional space domain modeling results. This feature is helpful to suppress the low wavenumber artifacts in reverse-time migration images, which are caused by the widely used cross-correlation imaging condition. This thesis illustrates modeling acoustic waves in both conventional space domain and pseudo-depth domain. The numerical tool used to model acoustic waves is built based on the lowrank approximation of Fourier integral operators. To investigate the potential
Oliveira, Micael J. T.; Nogueira, Fernando
2008-04-01
We present a computer package designed to generate and test norm-conserving pseudo-potentials within Density Functional Theory. The generated pseudo-potentials can be either non-relativistic, scalar relativistic or fully relativistic and can explicitly include semi-core states. A wide range of exchange-correlation functionals is included. Program summaryProgram title: Atomic Pseudo-potentials Engine (APE) Catalogue identifier: AEAC_v1_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEAC_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 88 287 No. of bytes in distributed program, including test data, etc.: 649 959 Distribution format: tar.gz Programming language: Fortran 90, C Computer: any computer architecture, running any flavor of UNIX Operating system: GNU/Linux RAM: APE also has a very sophisticated and user-friendly input system. Running time: The example given in this paper (Si) takes 10 s to run on a Pentium IV machine clocked at 2 GHz.
Calibration of Correlation Radiometers Using Pseudo-Random Noise Signals
Directory of Open Access Journals (Sweden)
Sebastián Pantoja
2009-08-01
Full Text Available The calibration of correlation radiometers, and particularly aperture synthesis interferometric radiometers, is a critical issue to ensure their performance. Current calibration techniques are based on the measurement of the cross-correlation of receivers’ outputs when injecting noise from a common noise source requiring a very stable distribution network. For large interferometric radiometers this centralized noise injection approach is very complex from the point of view of mass, volume and phase/amplitude equalization. Distributed noise injection techniques have been proposed as a feasible alternative, but are unable to correct for the so-called “baseline errors” associated with the particular pair of receivers forming the baseline. In this work it is proposed the use of centralized Pseudo-Random Noise (PRN signals to calibrate correlation radiometers. PRNs are sequences of symbols with a long repetition period that have a flat spectrum over a bandwidth which is determined by the symbol rate. Since their spectrum resembles that of thermal noise, they can be used to calibrate correlation radiometers. At the same time, since these sequences are deterministic, new calibration schemes can be envisaged, such as the correlation of each receiver’s output with a baseband local replica of the PRN sequence, as well as new distribution schemes of calibration signals. This work analyzes the general requirements and performance of using PRN sequences for the calibration of microwave correlation radiometers, and particularizes the study to a potential implementation in a large aperture synthesis radiometer using an optical distribution network.
Calibration of correlation radiometers using pseudo-random noise signals.
Pérez, Isaac Ramos; Bosch-Lluis, Xavi; Camps, Adriano; Alvarez, Nereida Rodriguez; Hernandez, Juan Fernando Marchán; Domènech, Enric Valencia; Vernich, Carlos; de la Rosa, Sonia; Pantoja, Sebastián
2009-01-01
The calibration of correlation radiometers, and particularly aperture synthesis interferometric radiometers, is a critical issue to ensure their performance. Current calibration techniques are based on the measurement of the cross-correlation of receivers' outputs when injecting noise from a common noise source requiring a very stable distribution network. For large interferometric radiometers this centralized noise injection approach is very complex from the point of view of mass, volume and phase/amplitude equalization. Distributed noise injection techniques have been proposed as a feasible alternative, but are unable to correct for the so-called "baseline errors" associated with the particular pair of receivers forming the baseline. In this work it is proposed the use of centralized Pseudo-Random Noise (PRN) signals to calibrate correlation radiometers. PRNs are sequences of symbols with a long repetition period that have a flat spectrum over a bandwidth which is determined by the symbol rate. Since their spectrum resembles that of thermal noise, they can be used to calibrate correlation radiometers. At the same time, since these sequences are deterministic, new calibration schemes can be envisaged, such as the correlation of each receiver's output with a baseband local replica of the PRN sequence, as well as new distribution schemes of calibration signals. This work analyzes the general requirements and performance of using PRN sequences for the calibration of microwave correlation radiometers, and particularizes the study to a potential implementation in a large aperture synthesis radiometer using an optical distribution network.
Pseudo-Hermitian random matrix theory
Energy Technology Data Exchange (ETDEWEB)
Srivastava, S.C.L. [RIBFG, Variable Energy Cyclotron Centre, 1/AF Bidhan nagar, Kolkata-700 064 (India); Jain, S.R. [NPD, Bhabha Atomic Research Centre, Mumbai-400 085 (India)
2013-02-15
Complex extension of quantum mechanics and the discovery of pseudo-unitarily invariant random matrix theory has set the stage for a number of applications of these concepts in physics. We briefly review the basic ideas and present applications to problems in statistical mechanics where new results have become possible. We have found it important to mention the precise directions where advances could be made if further results become available. (Copyright copyright 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)
Bladder rupture causing pseudo acute renal failure
Directory of Open Access Journals (Sweden)
Luciana Andrea Avena Smeili
2011-09-01
Full Text Available Bladder rupture is a rare condition associated with significant morbidityand mortality. It is classified into traumatic, nontraumatic or idiopathic andspontaneous. The nonspecific initial clinical presentation is followed bydiscomfort in the lower abdomen, oliguria, hematuria and ascitis. Laboratoryabnormalities simulate the picture of acute renal failure and occurs by amechanism called auto reverse dialysis, with absorption of excreta throughthe peritoneal membrane. The authors describe a case of bladder rupturein morphologically and functionally normal urinary bladder associated withalcohol intake in young healthy man, manifested by abdominal discomfort,pseudo renal failure and massive ascitis. The diagnosis was made by anabdominal multidetector computed tomography confirmed by the finding of7 cm laceration at laparotomy.
Pseudo ventricular tachycardia: a case report.
LENUS (Irish Health Repository)
Riaz, A
2012-02-01
BACKGROUND: Dramatic artifacts of pseudo flutter have been reported in the past secondary to various factors including tremor (Handwerker and Raptopoulos in N Engl J Med 356:503, 2007) and dialysis machines (Kostis et al. in J Electrocardiol 40(4):316-318, 2007). METHODS: We present this unusual case where the artifact, produced by tremor, was so pronounced to be misdiagnosed and treated as ventricular tachycardia. CONCLUSION: This case highlights the importance of correlating ECG findings with history and clinical examination and of using 12 lead ECGs for rhythm interpretation especially to confirm consistence of arrhythmias in all leads.
Pseudo-communication vs Quasi-communication
Directory of Open Access Journals (Sweden)
Елена Константиновна Черничкина
2016-12-01
Full Text Available The article is devoted to the analysis of such specific forms of human interaction as quasi- and pseudo-communication. The authors specify the terms which sometimes are used interchangeably. The aim of the conducted research is to find out and demonstrate existing differences and similarities of these communicative phenomena on the basis of theoretical and empirical analysis of the research material in the Russian and English languages. The authors describe communicative features of these phenomena and consider the reasons for such forms of communication and their increased use at present. The research material is represented fiction extracts, film scripts, jokes, print media, a collection of oral speech records both in Russian and English. The authors make use of the following research methods: definitional analysis (to define the terminology of the research, the method of linguistic observation and introspection (to select the communicative situations, the descriptive-analytical method and the method of comparative analysis (to identify similarities and differences of the target phenomena, and the conversational analysis method (to view productivity and effectiveness of a dialogue, etc. The classification of possible forms of their existence in different discourses is suggested. The authors assume that both pseudo- and quasi-communication are characterized as fictitious forms of human interaction with some noticeable violation of the basic communicative model. Pseudo-communication suffers from the discrepancy of the meaning of a coded and decoded message. The authors put forward the main parameters of scientific classification of it as follows: adequate understanding, intentionality, and the stage of communicative action where the failure takes place. At the same time they stress the necessity to distinguish the cases of pseudo talks from phatic and indirect communication. Quasi-communcation is marked by the lack of a real partner and hence
The application of time-frequency analysis to the air-coupled ultrasonic testing of concrete.
Berriman, James R; Hutchins, David A; Neild, Adrian; Gan, Tat Hean; Purnell, Phil
2006-04-01
Air-coupled ultrasound has been used for the nondestructive evaluation of concrete, using broad bandwidth electrostatic transducers and chirp excitation. This paper investigates the benefits of using time-frequency analysis in such situations, for both waveform retrieval and imaging in the presence of low signal levels. The use of the short-term Fourier transform, the Wavelet transform, and the Wigner-Ville distribution all are considered, in which accurate tracking of the ultrasonic chirp signals is demonstrated. The Hough transform then is applied as a filter. An image of a steel reinforcement bar in concrete has been produced to illustrate this approach.
Scaphoid pseudo-arthrosis: Frequency, pathogenesis and course
Energy Technology Data Exchange (ETDEWEB)
Schunk, K.; Teifke, A.; Benning, R.; Dahm, M.; Thelen, R.; Schild, H.
1989-06-01
Eighty-three scaphoid pseudo-arthroses were found amongst 1.104 scaphoid examinations. Sixtyseven were present at the first examination and 16 pseudo-arthroses developed amongst 252 scaphoid fractures. Men were affected predominantly, particularly in the 20 to 40-year old group. Fractures in the proximal third of the scaphoid and vertical oblique fractures had a particular tendency to pseudo-arthrosis formation. The operative treatment of choice is a Matti-Russe bone graft. Only one patient in seven with definite scaphoid pseudo-arthrosis showed firm fusion. (orig.).
Pseudo-Observables in Higgs decays
CERN. Geneva
2015-01-01
In view of future high-statistics data, it is useful to define a framework for precise determinations of the properties of the Higgs particle valid in generic extensions of the Standard Model. For Higgs decays, this goal can be achieved with a limited set of "Pseudo-Observables" (PO). The PO provides a systematic generalization of the "kappa-framework" so far adopted by the LHC experiments and provide a useful bridge between data and theory predictions. I discuss how the PO are defined, with particular attention to the h->4f decays, and how they can be used to test various dynamical and symmetry hypotheses about the Higgs sector. The relation between PO and EFT couplings is also discussed.
Syngeneic AAV pseudo-vectors potentiates full vector transduction
An excessive amount of empty capsids are generated during regular AAV vector production process. These pseudo-vectors often remain in final vectors used for animal studies or clinical trials. The potential effects of these pseudo-vectors on AAV transduction have been a major concern. In the current ...
Pseudo-populations a basic concept in statistical surveys
Quatember, Andreas
2015-01-01
This book emphasizes that artificial or pseudo-populations play an important role in statistical surveys from finite universes in two manners: firstly, the concept of pseudo-populations may substantially improve users’ understanding of various aspects in the sampling theory and survey methodology; an example of this scenario is the Horvitz-Thompson estimator. Secondly, statistical procedures exist in which pseudo-populations actually have to be generated. An example of such a scenario can be found in simulation studies in the field of survey sampling, where close-to-reality pseudo-populations are generated from known sample and population data to form the basis for the simulation process. The chapters focus on estimation methods, sampling techniques, nonresponse, questioning designs and statistical disclosure control.This book is a valuable reference in understanding the importance of the pseudo-population concept and applying it in teaching and research.
Most pseudo-bulges can be formed at later stages of major mergers
Sauvaget, T.; Hammer, F.; Puech, M.; Yang, Y. B.; Flores, H.; Rodrigues, M.
2018-01-01
Most giant spiral galaxies have pseudo or disc-like bulges that are considered to be the result of purely secular processes. This may challenge the hierarchical scenario predicting about one major merger per massive galaxy (>3 × 1010 M⊙) since the last ∼9 billion years. Here, we verify whether or not the association between pseudo-bulges and secular processes is irrevocable. Using GADGET2 N-body/SPH simulations, we have conducted a systematic study of remnants of major mergers for which progenitors have been selected (1) to follow the gas richness-look back time relationship, and (2) with a representative distribution of orbits and spins in a cosmological frame. Analysing the surface mass density profile of both nearby galaxies and merger remnants with two components, we find that most of them show pseudo-bulges or bar dominated centres. Even if some orbits lead to classical bulges just after the fusion, the contamination by the additional gas that gradually accumulates to the centre and forming stars later on, leads to remnants apparently dominated by pseudo-bulges. We also found that simple smoothed particle hydrodynamics (SPH) simulations should be sufficient to form realistic spiral galaxies as remnants of ancient gas-rich mergers without the need for specifically tuned feedback conditions. We then conclude that pseudo-bulges and bars in spiral galaxies are natural consequences of major mergers when they are realized in a cosmological context, i.e. with gas-rich progenitors as expected when selected in the distant Universe.
Taufer, Michela; Licon, Abel; Araiza, Roberto; Mireles, David; van Batenburg, F H D; Gultyaev, Alexander P; Leung, Ming-Ying
2009-01-01
Pseudoknots have been recognized to be an important type of RNA secondary structures responsible for many biological functions. PseudoBase, a widely used database of pseudoknot secondary structures developed at Leiden University, contains over 250 records of pseudoknots obtained in the past 25 years through crystallography, NMR, mutational experiments and sequence comparisons. To promptly address the growing analysis requests of the researchers on RNA structures and bring together information from multiple sources across the Internet to a single platform, we designed and implemented PseudoBase++, an extension of PseudoBase for easy searching, formatting and visualization of pseudoknots. PseudoBase++ (http://pseudobaseplusplus.utep.edu) maps the PseudoBase dataset into a searchable relational database including additional functionalities such as pseudoknot type. PseudoBase++ links each pseudoknot in PseudoBase to the GenBank record of the corresponding nucleotide sequence and allows scientists to automatically visualize RNA secondary structures with PseudoViewer. It also includes the capabilities of fine-grained reference searching and collecting new pseudoknot information.
La tuberculose abdominale pseudo-tumorale
El Barni, Rachid; Lahkim, Mohamed; Achour, Abdessamad
2012-01-01
Introduction L’objectif de ce travail est de rapporter cinq cas de tuberculose abdominale pseudo-tumorale afin d’en souligner les aspects diagnostiques et thérapeutiques. Cinq observations sont colligées dans le service de chirurgie générale de l’hôpital militaire Avicenne de Marrakech au cours de l’année 2007. Les aspects cliniques sont disparates. Ainsi, les auteurs ont noté un syndrome péritonéal dans un cas, une masse épigastrique dans un cas, une lésion suspect du sigmoïde dans un cas, une masse de la fosse iliaque droite dans un cas et une altération de l’état général avec fièvre dans le dernier cas. Un seul patient avaient bénéficié d’une biopsie scano-guidée et les quatre patients restants avaient été opérés. Une masse du méso côlon était notée dans le premier cas. Dans le second cas, l’aspect de la masse épigastrique et son siège avaient orienté vers une tumeur du grand omentum. Une localisation tuberculeuse péritonéale et sigmoïdienne avait été trouvée dans le troisième cas. Le diagnostic d’une tumeur du côlon droit était hautement suspect chez le patient séropositif qui avait présenté une péritonite post-opératoire et décédé à J + 3 dans un tableau de choc septique. Le siège et l’aspect nécrotique des lésions trouvées à la tomodensitométrie chez la seule patiente de l’étude avaient fait discuter en premier un lymphome. Même en l’absence d’antécédents de tuberculose pulmonaire, le diagnostic tuberculose abdominale pseudo-tumorale doit être évoqué surtout dans un pays d’endémie comme le notre et le recours à une laparotomie est justifié chaque fois que persiste un doute diagnostique ou en cas de complication. PMID:23330023
The theory of pseudo-rigid bodies
Cohen, Harley
1988-01-01
This monograph concerns the development, analysis, and application of the theory of pseudo-rigid bodies. It collects together our work on that subject over the last five years. While some results have appeared else where, much of the work is new. Our objective in writing this mono graph has been to present a new theory of the deformation of bodies, one that has not only a firm theoretical basis, but also the simplicity to serve as an effective tool in practical problems. Consequently, the main body of the treatise is a multifaceted development of the theory, from foundations to explicit solutions to linearizations to methods of approximation. The fact that this variety of aspects, each examined in considerable detail, can be collected together in a single, unified treat ment gives this theory an elegance that we feel sets it apart from many others. While our goal has always been to give a complete treatment of the theory as it now stands, the work here is not meant to be definitive. Theories are not ent...
Loop-Effects in Pseudo-Supersymmetry
Energy Technology Data Exchange (ETDEWEB)
Klein, Matthias
2002-11-01
We analyze the transmission of supersymmetry breaking in brane-world models of pseudo-supersymmetry. In these models two branes preserve different halves of the bulk supersymmetry. Thus supersymmetry is broken although each sector of the model is supersymmetric when considered separately. The world-volume theory on one brane feels the breakdown of supersymmetry only through two-loop interactions involving a coupling to fields from the other brane. In a 5D toy model with bulk vectors, we compute the diagrams that contribute to scalar masses on one brane and find that the masses are proportional to the compactification scale up to logarithmic corrections, m{sup 2} {infinity} (2{pi}R){sup -2} (ln(2{pi}R m{sub S}) - 1.1), where m{sub s} is an ultraviolet cutoff. Thus, for large compactification radii, where this result is valid, the brane scalars acquire a positive mass squared. We also compute the three-loop diagrams relevant to the Casimir energy between the two branes and find E {infinity} (2{pi}R){sup -4}((ln(2{pi}R m{sub S}) - 1.7){sup 2} + 0.2). For large radii, this yields a repulsive Casimir force.
Pseudo-Random Mating Populations. in Celebration of the 80th Anniversary of the Hardy-Weinberg Law
Li, C. C.
1988-01-01
That random mating leads to Hardy-Weinberg distribution of genotypes is well known. This report is to show that, if the deviations from random mating are of a certain pattern, the offspring generation will also be in Hardy-Weinberg proportions. This brings out the fact that random mating is a sufficient condition, not a necessary one, for the attainment of the Hardy-Weinberg proportions. Such nonrandom-mating populations are tentatively said to be pseudo-random mating. Pseudo-random-mating po...
Hacerse y volverse como nexos pseudo-copulativos
Delbecque, Nicole; Van Gorp, Lise
2013-01-01
Cette contribution aborde les différences conceptuelles entre les pseudo-copules hacerse et volverse, partant des notions de «réalisation» et de «régression» qui caractérisent leurs emplois lexicaux. Esta contribución aborda las diferencias conceptuales entre las pseudo-cópulas hacerse y volverse, partiendo de las nociones de «realización» y de «regresión» que caracterizan sus empleos léxicos. This contribution tackles the conceptual differences between the pseudo-copulas hacerse and vo...
Pseudo-Supersymmetry and the Domain-Wall/Cosmology Correspondence
Skenderis, K.; Townsend, P. K.
2006-01-01
The correspondence between domain-wall and cosmological solutions of gravity coupled to scalar fields is explained. Any domain wall solution that admits a Killing spinor is shown to correspond to a cosmology that admits a pseudo-Killing spinor: whereas the Killing spinor obeys a Dirac-type equation with hermitian `mass'-matrix, the corresponding pseudo-Killing spinor obeys a Dirac-type equation with a anti-hermitian `mass'-matrix. We comment on some implications of (pseudo)supersymmetry.
Protocols for data hiding in pseudo-random state
Craver, Scott; Li, Enping; Yu, Jun
2009-02-01
An emerging form of steganographic communication uses ciphertext to replace the output of a random or strong pseudo-random number generator. PRNG-driven media, for example computer animated backdrops in video-conferencing channels, can then be used as a covert channel, if the PRNG bits that generated a piece of content can be estimated by the recipient. However, all bits sent over such a channel must be computationally indistinguishable from i.i.d. coin flips. Ciphertext messages and even key exchange datagrams are easily shaped to match this distribution; however, when placing these messages into a continous stream of PRNG bits, the sender is unable to provide synchronization markers, metadata, or error correction to ensure the message's location and proper decoding. In this paper we explore methods for message transmission and steganographic key exchange in such a "coin flip" channel. We establish that key exchange is generally not possible in this channel if an adversary possesses even a modest noise budget. If the warden is not vigilant in adding noise, however, communication is very simple.
Pseudo-differential operators groups, geometry and applications
Zhu, Hongmei
2017-01-01
This volume consists of papers inspired by the special session on pseudo-differential operators at the 10th ISAAC Congress held at the University of Macau, August 3-8, 2015 and the mini-symposium on pseudo-differential operators in industries and technologies at the 8th ICIAM held at the National Convention Center in Beijing, August 10-14, 2015. The twelve papers included present cutting-edge trends in pseudo-differential operators and applications from the perspectives of Lie groups (Chapters 1-2), geometry (Chapters 3-5) and applications (Chapters 6-12). Many contributions cover applications in probability, differential equations and time-frequency analysis. A focus on the synergies of pseudo-differential operators with applications, especially real-life applications, enhances understanding of the analysis and the usefulness of these operators.
Pseudo-Goldstone modes in isospin-asymmetric nuclear matter
Energy Technology Data Exchange (ETDEWEB)
Cohen, T.D. [Univ. of Washington, Seattle, WA (United States); Broniowski, W. [H. Niewodniczanski Institute of Nuclear Physics, Cracow (Poland)
1995-01-01
The authors analyze the chiral limit in dense isospin-asymmetric nuclear matter. It is shown that the pseudo-Goldstone modes in this system are qualitatively different from the case of isospin-symmetric matter.
Pseudo-Goldstone modes in isospin-asymmetric nuclear matter
Energy Technology Data Exchange (ETDEWEB)
Cohen, T.D. [Washington Univ., Seattle, WA (United States). Dept. of Physics; Broniowski, W. [Institute of Nuclear Physics, Cracow (Poland)
1994-12-01
We analyze the chiral limit in dense isoptin-asymmetric nuclear matter. It is shown that the pseudo-Goldstone modes in this system are qualitatively different from the case of isospin-symmetric matter. (author). 20 refs.
Her-entingen tegen Pseudo Vogelpest (NCD) op 'Het Spelderholt'
Voorst, van A.
1993-01-01
Pseudo Vogelpest of NCD is een gevreesde virusziekte, waartegen een entverplichting geldt. Na het uitbreken van de ziekte in het zuiden van Nederland is al het volwassen pluimvee op Het Spelderholt opnieuw geënt.
Pseudo-outbreak of Actinomyces graevenitzii associated with bronchoscopy.
Peaper, David R; Havill, Nancy L; Aniskiewicz, Michael; Callan, Deborah; Pop, Olivia; Towle, Dana; Boyce, John M
2015-01-01
Outbreaks and pseudo-outbreaks of infection related to bronchoscopy typically involve Gram-negative bacteria, Mycobacterium species or Legionella species. We report an unusual bronchoscopy-related pseudo-outbreak due to Actinomyces graevenitzii. Extensive epidemiological and microbiological investigation failed to identify a common source. Strain typing revealed that the cluster was comprised of heterogeneous strains of A. graevenitzii. A change in laboratory procedures for Actinomyces cultures was coincident with the emergence of the pseudo-outbreak, and we determined that A. graevenitzii isolates more readily adopted a white, dry, molar tooth appearance on anaerobic colistin nalidixic acid (CNA) agar which likely facilitated its detection and identification in bronchoscopic specimens. This unusual pseudo-outbreak was related to frequent requests of bronchoscopists for Actinomyces cultures combined with a change in microbiology laboratory practices. Copyright © 2015, American Society for Microbiology. All Rights Reserved.
Pseudo-telepathy: input cardinality and Bell-type inequalities
Gisin, Nicolas; Methot, André; Scarani, Valerio
2006-01-01
Pseudo-telepathy is the most recent form of rejection of locality. Many of its properties have already been discovered: for instance, the minimal entanglement, as well as the minimal cardinality of the output sets, have been characterized. This paper contains two main results. First, we prove that no bipartite pseudo-telepathy game exists, in which one of the partners receives only two questions; as a corollary, we show that the minimal "input cardinality", that is, the minimal number of ques...
Maximally entangled states in pseudo-telepathy games
Mančinska, Laura
2015-01-01
A pseudo-telepathy game is a nonlocal game which can be won with probability one using some finite-dimensional quantum strategy but not using a classical one. Our central question is whether there exist two-party pseudo-telepathy games which cannot be won with probability one using a maximally entangled state. Towards answering this question, we develop conditions under which maximally entangled states suffice. In particular, we show that maximally entangled states suffice for weak projection...
On Some (Pseudo) Involutions in the Riordan Group
Cameron, Naiomi T.; Nkwanta, Asamoah
2005-08-01
In this paper, we address a question posed by L. Shapiro regarding algebraic and/or combinatorial characterizations of the elements of order 2 in the Riordan group. We present two classes of combinatorial matrices having pseudo-order 2. In one class, we find generalizations of Pascal's triangle and use some special cases to discover and prove interesting identities. In the other class, we find generalizations of Nkwanta's RNA triangle and show that they are pseudo-involutions.
Diagnosis and Treatment of Pseudo-Class III Malocclusion
Ariel Reyes; Luis Serret; Marcos Peguero; Orlando Tanaka
2014-01-01
Pseudo-Class III malocclusion is characterized by the presence of an anterior crossbite due to a forward functional displacement of the mandible; in most cases, the maxillary incisors present some degree of retroclination, and the mandibular incisors are proclined. Various types of appliances have been described in the literature for the early treatment of pseudo-Class III malocclusion. The objectives of this paper are to demonstrate the importance of making the differential diagnosis between...
Study of gray image pseudo-color processing algorithms
Hu, Jinlong; Peng, Xianrong; Xu, Zhiyong
In gray images which contain abundant information, if the differences between adjacent pixels' intensity are small, the required information can not be extracted by humans, since humans are more sensitive to color images than gray images. If gray images are transformed to pseudo-color images, the details of images will be more explicit, and the target will be recognized more easily. There are two methods (in frequency field and in spatial field) to realize pseudo-color enhancement of gray images. The first method is mainly the filtering in frequency field, and the second is the equal density pseudo-color coding methods which mainly include density segmentation coding, function transformation and complementary pseudo-color coding. Moreover, there are many other methods to realize pseudo-color enhancement, such as pixel's self-transformation based on RGB tri-primary, pseudo-color coding from phase-modulated image based on RGB color model, pseudo-color coding of high gray-resolution image, et al. However, above methods are tailored to a particular situation and transformations are based on RGB color space. In order to improve the visual effect, the method based on RGB color space and pixels' self-transformation is improved in this paper, which is based on HIS color space. Compared with other methods, some gray images with ordinary formats can be processed, and many gray images can be transformed to pseudo-color images with 24 bits. The experiment shows that the processed image has abundant levels, which is consistent with human's perception.
Gastric pseudo-ulcers: membrana angularis and pyloric torus defects.
Peavy, P W; Clements, J L; Weens, H S
1975-03-01
The membrana angularis and pyloric torus defects are two physiologic bulges which can simulate ulcerations along the lesser curvature of the stomach. The muscular anatomy of the stomach and the mechanism which produces these pseudo-ulcers are discussed. Both pseudoniches can be seen transiently in normal individuals but occasionally are such prominence as to become diagnostic pitfalls. The features and significance of each pseudo-ulcer are reviewed in an attempt to facilitate recognition on the upper gastrointestinal barium examination.
Pseudo-Hermitian quantum mechanics with unbounded metric operators.
Mostafazadeh, Ali
2013-04-28
I extend the formulation of pseudo-Hermitian quantum mechanics to η(+)-pseudo-Hermitian Hamiltonian operators H with an unbounded metric operator η(+). In particular, I give the details of the construction of the physical Hilbert space, observables and equivalent Hermitian Hamiltonian for the case that H has a real and discrete spectrum and its eigenvectors belong to the domain of η(+) and consequently √η(+).
"Pseudo" nomenclature in dermatology: What′s in a name?
Directory of Open Access Journals (Sweden)
Sangita Ghosh
2013-01-01
Full Text Available In the bewildering array of scientific nomenclature in the medical field, it is important to use correct terminology, know their aberrations and the reason behind a specific terminology. This paper is an attempt towards compiling all the pseudo-nomenclatures coined in dermatology, in order to make it easier to retain and recollect these pseudo names, signs, morphology, diseases, and conditions. It is also imperative to know the true entities that these pseudo names masquerade as, so as to understand the explanation for assigning the term ′pseudo′ to these conditions. A total of 52 pseudo-terms have been compiled here in reference to dermatology. Most of these pseudo-nomenclatures were coined due to some clinical or histopathological resemblance to the true conditions, while some were premature conclusions drawn from a flawed understanding of the basic nature of the condition. Clear understanding of each of these terms and the explanation behind them being pseudo will enable a dermatologist to avoid misdiagnosis and needless confusion.
Two Dutch many ’s and the structure of pseudo-partitives
Directory of Open Access Journals (Sweden)
Eddy G. Ruys
2017-02-01
Full Text Available This article discusses the syntax and semantics of Dutch pseudo-partitive constructions with measure nouns, such as 'drie liter water' ‘three liters of water’. The major empirical puzzle is the distribution of two Dutch instances of 'many'/'much': 'veel' and 'vele'. Unlike earlier proposals, I analyze 'veel' as a gradable adjective, and 'vele' as a numeral. It turns out that in pseudo-partitives with pure measure readings, only 'vele' can freely occur ('veel liters water' only allows a marked “liter-bottle” reading. This is puzzling, because 'veel' is otherwise allowed both with mass and count terms, and both in the singular and in the plural. I adopt the more-or-less standard right-branching syntax for Dutch pseudo-partitives (providing some new arguments for its correctness, and propose a semantics for measure nouns which, in combination with Ionin & Matushansky’s semantics for cardinals, correctly characterizes these constructions and explains where pure measure readings occur. I then show that my analysis correctly derives the behavior of 'veel' and 'vele' in these constructions, given their characterization as a gradable adjective and a numeral. This article is part of the Special Collection: Partitives
Characterization of Electron Microscopes with Binary Pseudo-random Multilayer Test Samples
Energy Technology Data Exchange (ETDEWEB)
V Yashchuk; R Conley; E Anderson; S Barber; N Bouet; W McKinney; P Takacs; D Voronov
2011-12-31
Verification of the reliability of metrology data from high quality X-ray optics requires that adequate methods for test and calibration of the instruments be developed. For such verification for optical surface profilometers in the spatial frequency domain, a modulation transfer function (MTF) calibration method based on binary pseudo-random (BPR) gratings and arrays has been suggested [1] and [2] and proven to be an effective calibration method for a number of interferometric microscopes, a phase shifting Fizeau interferometer, and a scatterometer [5]. Here we describe the details of development of binary pseudo-random multilayer (BPRML) test samples suitable for characterization of scanning (SEM) and transmission (TEM) electron microscopes. We discuss the results of TEM measurements with the BPRML test samples fabricated from a WiSi2/Si multilayer coating with pseudo-randomly distributed layers. In particular, we demonstrate that significant information about the metrological reliability of the TEM measurements can be extracted even when the fundamental frequency of the BPRML sample is smaller than the Nyquist frequency of the measurements. The measurements demonstrate a number of problems related to the interpretation of the SEM and TEM data. Note that similar BPRML test samples can be used to characterize X-ray microscopes. Corresponding work with X-ray microscopes is in progress.
Characterization of electron microscopes with binary pseudo-random multilayer test samples
Energy Technology Data Exchange (ETDEWEB)
Yashchuk, Valeriy V., E-mail: VVYashchuk@lbl.gov [Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Conley, Raymond [NSLS-II, Brookhaven National Laboratory, Upton, NY 11973 (United States); Anderson, Erik H. [Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Barber, Samuel K. [Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Bouet, Nathalie [NSLS-II, Brookhaven National Laboratory, Upton, NY 11973 (United States); McKinney, Wayne R. [Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Takacs, Peter Z. [Brookhaven National Laboratory, Upton, NY 11973 (United States); Voronov, Dmitriy L. [Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States)
2011-09-01
Verification of the reliability of metrology data from high quality X-ray optics requires that adequate methods for test and calibration of the instruments be developed. For such verification for optical surface profilometers in the spatial frequency domain, a modulation transfer function (MTF) calibration method based on binary pseudo-random (BPR) gratings and arrays has been suggested and proven to be an effective calibration method for a number of interferometric microscopes, a phase shifting Fizeau interferometer, and a scatterometer [5]. Here we describe the details of development of binary pseudo-random multilayer (BPRML) test samples suitable for characterization of scanning (SEM) and transmission (TEM) electron microscopes. We discuss the results of TEM measurements with the BPRML test samples fabricated from a WiSi{sub 2}/Si multilayer coating with pseudo-randomly distributed layers. In particular, we demonstrate that significant information about the metrological reliability of the TEM measurements can be extracted even when the fundamental frequency of the BPRML sample is smaller than the Nyquist frequency of the measurements. The measurements demonstrate a number of problems related to the interpretation of the SEM and TEM data. Note that similar BPRML test samples can be used to characterize X-ray microscopes. Corresponding work with X-ray microscopes is in progress.
Optimum IMFs Selection Based Envelope Analysis of Bearing Fault Diagnosis in Plunger Pump
Directory of Open Access Journals (Sweden)
Wenliao Du
2016-01-01
Full Text Available As the plunger pump always works in a complicated environment and the hydraulic cycle has an intrinsic fluid-structure interaction character, the fault information is submerged in the noise and the disturbance impact signals. For the fault diagnosis of the bearings in plunger pump, an optimum intrinsic mode functions (IMFs selection based envelope analysis was proposed. Firstly, the Wigner-Ville distribution was calculated for the acquired vibration signals, and the resonance frequency brought on by fault was obtained. Secondly, the empirical mode decomposition (EMD was employed for the vibration signal, and the optimum IMFs and the filter bandwidth were selected according to the Wigner-Ville distribution. Finally, the envelope analysis was utilized for the selected IMFs filtered by the band pass filter, and the fault type was recognized by compared with the bearing character frequencies. For the two modes, inner race fault and compound fault in the inner race and roller of rolling element bearing in plunger pump, the experiments show that a promising result is achieved.
Energy Technology Data Exchange (ETDEWEB)
Lima, Zelmo Rodrigues de; Silva, Fernando Carvalho da; Alvim, Antonio C. Marques [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia. Programa de Engenharia Nuclear]. E-mail: zelmo@con.ufrj.br; fernando@con.ufrj.br; alvim@con.ufrj.br
2005-07-01
In this work we propose the application of the pseudo-harmonics in modal methods of spatial kinetics. The pseudo-harmonics, or the pseudo-modes, are the eigenfunctions associated to the leakage+removal operator in each group of energy of the steady-state diffusion equation. This operator is self-adjoint and it is not necessary to calculate the adjoints eigenfunctions. In the present work the pseudo-harmonics will be obtained starting from the equation of diffusion discretized by the coarse-mesh finite difference (CMFD). The modal methods approximate the time-dependent flux for an expansion in functions predetermined, that include the spatial dependence, with unknown expansion coefficients, that include the whole dependent part of the time. The obtaining of the system whose solution they are the coefficients of the modal expansion is done with aid of a function weight. Using the pseudomodes obtained in the steady state calculations, in the modal expansion as been the dependent functions of the space, we will show that the function weight can be chosen as being the own adjoint pseudo-modes. This calculation leads to a linear system of ordinary differential equations with the defined dimension for the number of pseudo-harmonics employed. The solution of the equations is built through the analytical integration of the equations of the precursor of delayed neutron. The proposed method was tested and it present good results, when compared with the direct method. (author)
When Is "Pseudo-Ludwig's Angina" Associated With Coagulopathy Also a "Pseudo" Hemorrhage?
Lovallo, Emily; Patterson, Sarah; Erickson, Mitchel; Chin, Cynthia; Blanc, Paul; Durrani, Timur S
2013-01-01
Sublingual hematoma secondary to short-acting anticoagulants such as warfarin has been labeled "pseudo-Ludwig's angina" to distinguish it from the classic syndrome of localized infection and swelling involving the upper airway. Sublingual hematoma with airway compromise secondary to brodifacoum, a common long-acting anticoagulant rodenticide, has only been reported in the veterinary literature. We report a case of massive tongue swelling and impending airway compromise in the context of an intentional long-acting anticoagulant ingestion leading to coagulopathy. The swelling was initially presumed to be due either to infection or hemorrhage, but this was not supported by computed tomography scan imaging. Instead, the patient's clinical course was consistent with corticosteroid-responsive angioedema, temporally associated with the ingested brodifacoum.
Directory of Open Access Journals (Sweden)
Sonia Quijano-Scheggia
2008-06-01
Full Text Available Potentially toxic species of the genus Pseudo-nitzschia were studied along the Spanish NW Mediterranean coast from January 2005 to May 2006. Observation in electron microscopy revealed the presence of Pseudo-nitzschia brasiliana, P. calliantha, P. delicatissima, P. fraudulenta, P. multistriata and P. pungens. Several strains were isolated from coastal waters and their clonal cultures were compared by combined techniques, including light and electron microscopy and internal transcribed spacer (ITS-1, 5.8S and ITS-2 rDNA sequencing. Cultured isolates were submitted to HPLC analysis of pigments to evaluate the possibility of taxonomic discriminations by means of a simple chemotaxonomic approach. The genus Pseudo-nitzschia showed high cell concentrations during most of the year, but the population initiated a sharp decline at all stations in the period between April and May. P. delicatissima with P. calliantha were found at the northern stations between February and April, and at the southern stations between August and November. P. brasiliana and P. multistriata were only occasionally detected in the southern region. None of the environmental variables considered was significant to explain the observed spatial and temporal distributions of Pseudo-nitzschia species in the area studied. Differences in the growth rate and cell yield of the species indicate that biotic factors may play a role in the observed distributional patterns.
Pseudo-Newtonian planar circular restricted 3-body problem
Energy Technology Data Exchange (ETDEWEB)
Dubeibe, F.L., E-mail: fldubeibem@unal.edu.co [Facultad de Ciencias Humanas y de la Educación, Universidad de los Llanos, Villavicencio (Colombia); Grupo de Investigación en Relatividad y Gravitación, Escuela de Física, Universidad Industrial de Santander, A.A. 678, Bucaramanga (Colombia); Lora-Clavijo, F.D., E-mail: fadulora@uis.edu.co [Grupo de Investigación en Relatividad y Gravitación, Escuela de Física, Universidad Industrial de Santander, A.A. 678, Bucaramanga (Colombia); González, Guillermo A., E-mail: guillermo.gonzalez@saber.uis.edu.co [Grupo de Investigación en Relatividad y Gravitación, Escuela de Física, Universidad Industrial de Santander, A.A. 678, Bucaramanga (Colombia)
2017-02-12
We study the dynamics of the planar circular restricted three-body problem in the context of a pseudo-Newtonian approximation. By using the Fodor–Hoenselaers–Perjés procedure, we perform an expansion in the mass potential of a static massive spherical source up to the first non-Newtonian term, giving place to a gravitational potential that includes first-order general relativistic effects. With this result, we model a system composed by two pseudo-Newtonian primaries describing circular orbits around their common center of mass, and a test particle orbiting the system in the equatorial plane. The dynamics of the new system of equations is studied in terms of the Poincaré section method and the Lyapunov exponents, where the introduction of a new parameter ϵ, allows us to observe the transition from the Newtonian to the pseudo-Newtonian regime. We show that when the Jacobian constant is fixed, a chaotic orbit in the Newtonian regime can be either chaotic or regular in the pseudo-Newtonian approach. As a general result, we find that most of the pseudo-Newtonian configurations are less stable than their Newtonian equivalent.
Brain MR image segmentation using NAMS in pseudo-color.
Li, Hua; Chen, Chuanbo; Fang, Shaohong; Zhao, Shengrong
2017-12-01
Image segmentation plays a crucial role in various biomedical applications. In general, the segmentation of brain Magnetic Resonance (MR) images is mainly used to represent the image with several homogeneous regions instead of pixels for surgical analyzing and planning. This paper proposes a new approach for segmenting MR brain images by using pseudo-color based segmentation with Non-symmetry and Anti-packing Model with Squares (NAMS). First of all, the NAMS model is presented. The model can represent the image with sub-patterns to keep the image content and largely reduce the data redundancy. Second, the key idea is proposed that convert the original gray-scale brain MR image into a pseudo-colored image and then segment the pseudo-colored image with NAMS model. The pseudo-colored image can enhance the color contrast in different tissues in brain MR images, which can improve the precision of segmentation as well as directly visual perceptional distinction. Experimental results indicate that compared with other brain MR image segmentation methods, the proposed NAMS based pseudo-color segmentation method performs more excellent in not only segmenting precisely but also saving storage.
Coulomb Solutions from Improper Pseudo-Unitary Free Gauge Field Operator Translations
Directory of Open Access Journals (Sweden)
Andreas Aste
2014-12-01
Full Text Available Fundamental problems of quantum field theory related to the representation problem of canonical commutation relations are discussed within a gauge field version of a van Hove-type model. The Coulomb field generated by a static charge distribution is described as a formal superposition of time-like pseudo-photons in Fock space with a Krein structure. In this context, a generalization of operator gauge transformations is introduced to generate coherent states of Abelian gauge fields interacting with a charged background.
Diagnosis and Treatment of Pseudo-Class III Malocclusion
Reyes, Ariel; Serret, Luis; Peguero, Marcos; Tanaka, Orlando
2014-01-01
Pseudo-Class III malocclusion is characterized by the presence of an anterior crossbite due to a forward functional displacement of the mandible; in most cases, the maxillary incisors present some degree of retroclination, and the mandibular incisors are proclined. Various types of appliances have been described in the literature for the early treatment of pseudo-Class III malocclusion. The objectives of this paper are to demonstrate the importance of making the differential diagnosis between a skeletal and a pseudo-Class III malocclusion and to describe the correction of an anterior crossbite. The association of maxillary expansion and a 2 × 4 appliance can successfully be used to correct anterior crossbites. PMID:25525526
Diagnosis and Treatment of Pseudo-Class III Malocclusion
Directory of Open Access Journals (Sweden)
Ariel Reyes
2014-01-01
Full Text Available Pseudo-Class III malocclusion is characterized by the presence of an anterior crossbite due to a forward functional displacement of the mandible; in most cases, the maxillary incisors present some degree of retroclination, and the mandibular incisors are proclined. Various types of appliances have been described in the literature for the early treatment of pseudo-Class III malocclusion. The objectives of this paper are to demonstrate the importance of making the differential diagnosis between a skeletal and a pseudo-Class III malocclusion and to describe the correction of an anterior crossbite. The association of maxillary expansion and a 2 × 4 appliance can successfully be used to correct anterior crossbites.
Occlusal rehabilitation of pseudo-class III patient.
Cardoso, Antônio Carlos; Ferreira, Cimara Fortes; Oderich, Elisa; Pedroso, Moira Leão; Wicks, Russell
2015-01-01
To treat a patient with anterior crossbite, the clinician should first assess if it is a genuine class III or a pseudo-class III malocclusion. Cephalometric analysis is important; however, registering a patient's centric relation (CR) is simple, quick, and costless and can play a decisive role in a differential diagnosis for this type of patient profile. This clinical report depicts a patient clinically diagnosed as class III. After mandible manipulation in CR, it was noted that the patient in question was a pseudo-class III. The treatment was based on the pseudo-class III diagnosis. Therefore, the patient was rehabilitated by occlusal adjustments and conventional and implant-supported prostheses and without the need for invasive orthognathic surgery. © 2014 by the American College of Prosthodontists.
Pseudo-Glassification Material for G-Demption
Energy Technology Data Exchange (ETDEWEB)
Casella, Andrew M. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Buck, Edgar C. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Gates, Robert O. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Riley, Brian J. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
2014-09-01
G-Demption, LLC has requested that PPNL provide design input for a “pseudo-glassification” process associated with their proposed technology for generating gamma irradiation stations from used nuclear fuel. The irradiation design currently consists of an aluminum enclosure designed to allow for proper encapsulation of and heat flow from a used fuel rod while minimally impacting the streaming of gamma rays from the fuel. In order to make their design more robust, G-Demption is investigating the benefits of backfilling this aluminum enclosure with a setting material once the used fuel rod is properly placed. This process has been initially referred to as “pseudo-glassification”, and strives not to impact heat transport or gamma streaming from the used fuel rod while providing increased fuel rod protection and fission gas retention. PNNL has compiled an internal material evaluation and discussion for the “pseudo-glassification” process in this report.
Pseudo-periodic maps and degeneration of Riemann surfaces
Matsumoto, Yukio
2011-01-01
The first part of the book studies pseudo-periodic maps of a closed surface of genus greater than or equal to two. This class of homeomorphisms was originally introduced by J. Nielsen in 1944 as an extension of periodic maps. In this book, the conjugacy classes of the (chiral) pseudo-periodic mapping classes are completely classified, and Nielsen’s incomplete classification is corrected. The second part applies the results of the first part to the topology of degeneration of Riemann surfaces. It is shown that the set of topological types of all the singular fibers appearing in one-parameter holomorphic families of Riemann surfaces is in a bijective correspondence with the set of conjugacy classes of the pseudo-periodic maps of negative twists. The correspondence is given by the topological monodromy.
Optimal Base Encodings for Pseudo-Boolean Constraints
Codish, Michael; Fuhs, Carsten; Schneider-Kamp, Peter
2010-01-01
This paper formalizes the "optimal base problem", presents an algorithm to solve it, and describes its application to the encoding of Pseudo-Boolean constraints to SAT. We demonstrate the impact of integrating our algorithm within the Pseudo-Boolean constraint solver MiniSAT+. Experimentation indicates that our algorithm scales to consider bases involving numbers up to 1,000,000, improving on the restriction in MiniSAT+ to prime numbers up to 17. We show that, while for many examples primes up to 17 do suffice, encoding with respect to arbitrary bases improves the subsequent SAT solving time considerably.
Intestinal pseudo-obstruction: An important diagnostic challenge
Directory of Open Access Journals (Sweden)
Carmen Salvador-Coloma
2015-09-01
Full Text Available We present the case of a 72-year-old patient admitted on various occasions with symptoms of intestinal pseudo-obstruction. Extensive diagnostic tests eventually found that the patient had small-cell lung cancer associated with high anti-HU antibody titres, which pointed to a probable paraneoplastic intestinal obstruction syndrome associated with small-cell lung cancer. A paraneoplastic syndrome causing abnormal changes in gastrointestinal motility can be the first signs of small cell lung cancer. These syndromes improve with treatment of the underlying disease, as seen in our patient, who stopped having episodes of intestinal pseudo-obstruction after administration of chemotherapy.
Enhancing pseudo-telepathy in the magic square game.
Directory of Open Access Journals (Sweden)
Lukasz Pawela
Full Text Available We study the possibility of reversing an action of a quantum channel. Our principal objective is to find a specific channel that reverses as accurately as possible an action of a given quantum channel. To achieve this goal we use semidefinite programming. We show the benefits of our method using the quantum pseudo-telepathy Magic Square game with noise. Our strategy is to move the pseudo-telepathy region to higher noise values. We show that it is possible to reverse the action of a noise channel using semidefinite programming.
Enhancing pseudo-telepathy in the magic square game.
Pawela, Lukasz; Gawron, Piotr; Puchała, Zbigniew; Sładkowski, Jan
2013-01-01
We study the possibility of reversing an action of a quantum channel. Our principal objective is to find a specific channel that reverses as accurately as possible an action of a given quantum channel. To achieve this goal we use semidefinite programming. We show the benefits of our method using the quantum pseudo-telepathy Magic Square game with noise. Our strategy is to move the pseudo-telepathy region to higher noise values. We show that it is possible to reverse the action of a noise channel using semidefinite programming.
Signed Distance Computation using the Angle Weighted Pseudo-normal
DEFF Research Database (Denmark)
Bærentzen, Jakob Andreas; Aanæs, Henrik
2005-01-01
, the surface is not \\$C\\^1\\$ continuous, hence, the normal is undefined at these loci. In this paper, we undertake to show that the angle weighted pseudo-normal (originally proposed by Thürmer and Wüthrich and independently by Sequin) has the important property that it allows us to discriminate between points...... of the distance computation. Moreover, it provides an additional argument in favour of the angle weighted pseudo-normals being the natural extension of the face normals. Apart from the theoretical results, we also propose a simple and efficient algorithm for computing the signed distance to a closed \\$C\\^0\\$ mesh...
True versus Pseudo-Intestinal Malrotation: Case Series and Review.
Khara, Harshit S; Kothari, Shivangi T; Gruss, Claudia B; Langnas, Alan; Schafer, Daniel F; McCashland, Timothy M
2013-10-01
Intestinal malrotation is an anomaly of fetal intestinal rotation that can present with symptoms after birth or in early childhood, but is rarely diagnosed in adults. Patients who have symptomatic presentations require surgery. Other entities may mimic intestinal malrotation and respond to non-surgical management. We present 2 adult cases with the radiological diagnosis of intestinal malrotation: one with true malrotation presenting as a duodenal mass, and another with "pseudo-malrotation" due to altered anatomy. These cases illustrate the importance of recognizing and differentiating these rare adult presentations of true malrotation from "pseudo-malrotation" in regards to their acute management.
"Divine water" in the alchemical writings of pseudo-Democritus.
Martelli, Matteo
2009-03-01
The name of the chemical solution (divine water) or (sulfur water) is characterised by semantic ambiguity: the term theion means both "divine" and "sulfur," and Greek alchemists frequently play on this polysemy. This article analyses the use of this and similar expressions in the writings of pseudo-Democritus from both a technical and a philological point of view. A fragment preserved by the alchemists Moses and Synesius shows that pseudo-Democritus knows two different kinds of this "water," the second of which recalls a recipe found in the chemical Leiden Papyrus, and that the composition of the substance determines the form of its name.
Perturbation of sectorial projections of elliptic pseudo-differential operators
DEFF Research Database (Denmark)
Booss-Bavnbek, Bernhelm; Chen, Guoyuan; Lesch, Matthias
2012-01-01
Over a closed manifold, we consider the sectorial projection of an elliptic pseudo-differential operator A of positive order with two rays of minimal growth. We showthat it depends continuously on A when the space of pseudo-differential operators is equipped with a certain topology whichwe...... explicitly describe. Our main application deals with a continuous curve of arbitrary first order linear elliptic differential operators over a compact manifold with boundary. Under the additional assumption of the weak inner unique continuation property, we derive the continuity of a related curve...
Study of pseudo soldering based on eddy current pulsed thermography
Zhou, Xiuyun; Xue, Yun; Chen, Yaqiu; Lu, Xiaochuan; Liu, Zhen
2017-09-01
Pseudo soldering defects can break the electrical and mechanical connection between components and the print circuit board and eventually cause failure of the whole electronic equipment. In this letter, the eddy current pulsed thermography (ECPT) method was used for defect inspection of small-sized solder joints. The identification of defects of solder joints is based on the heat transfer between various component structures. The experimental results indicated that the ECPT method can be effectively used for defect detection and location of the solder joints. In addition, it can distinguish different degrees of pseudo soldering.
Low-carbon benefit analysis on DG penetration distribution system
National Research Council Canada - National Science Library
GE, Shaoyun; XU, Li; LIU, Hong; FANG, Jian
2015-01-01
.... This paper proposes a pseudo-sequential Monte Carlo simulation method for the low-carbon benefit evaluation of distribution system including distributed wind turbines, solar array and battery energy storage systems...
Study of a pseudo-empirical model approach to characterize plasma actuators
Energy Technology Data Exchange (ETDEWEB)
Marziali Bermudez, M [Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, UBA, Ciudad Universitaria Pab. I, Buenos Aires 1428 (Argentina); Sosa, R; Artana, G [Laboratorio de Fluidodinamica, Facultad de Ingenieria, UBA, Av. Paseo Colon 850, Buenos Aires 1063 (Argentina); Grondona, D; Marquez, A; Kelly, H, E-mail: rsosa@fi.uba.ar [Instituto de Fisica del Plasma (CONICET) - Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, UBA, Ciudad Universitaria Pab. I, Buenos Aires 1428 (Argentina)
2011-05-01
The use of plasma actuators is a recent technology that imposes a localized electric force that is used to control air flows. A suitable representation of actuation enables to undertake plasma actuators optimization, to design flow-control strategies, or to analyse the flow stabilization that can be attained by plasma forcing. The problem description may be clearly separated in two regions. An outer region, where the fluid is electrically neutral, in which the flow is described by the Navier-Stokes equation without any forcing term. An inner region, that forms a thin boundary layer, where the fluid is ionized and electric forces are predominant. The outer limit of the inner solution becomes the boundary condition for the outer problem. The outer problem can then be solved with a slip velocity that is issued from the inner solution. Although the solution for the inner problem is quite complex it can be contoured proposing pseudo-empirical models where the slip velocity of the outer problem is determined indirectly from experiments. This pseudo-empirical model approach has been recently tested in different cylinder flows and revealed quite adapted to describe actuated flow behaviour. In this work we determine experimentally the influence of the duty cycle on the slip velocity distribution. The velocity was measured by means of a pitot tube and flow visualizations of the starting vortex (i.e. the induced flow when actuation is activated in a quiescent air) have been done by means of the Schlieren technique. We also performed numerical experiments to simulate the outer region problem when actuation is activated in a quiescent air using a slip velocity distribution as a boundary condition. The experimental and numerical results are in good agreement showing the potential of this pseudo-empirical model approach to characterize the plasma actuation.
Fermionic coherent states for pseudo-Hermitian two-level systems
Energy Technology Data Exchange (ETDEWEB)
Cherbal, O [Physical Faculty, Theoretical Physics Lab, USTHB, BP 32 El-Alia, Bab Ezzouar, 16111 Algiers (Algeria); Drir, M [Physical Faculty, Theoretical Physics Lab, USTHB, BP 32 El-Alia, Bab Ezzouar, 16111 Algiers (Algeria); Maamache, M [Laboratoire de Physique Quantique et Systemes Dynamiques, Department of Physics, Setif University, Setif 19000 (Algeria); Trifonov, D A [Institute of Nuclear Research, 72 Tzarigradsko Chaussee, 1784 Sofia (Bulgaria)
2007-02-23
We introduce creation and annihilation operators of pseudo-Hermitian fermions for two-level systems described by a pseudo-Hermitian Hamiltonian with real eigenvalues. This allows the generalization of the fermionic coherent states approach to such systems. Pseudo-fermionic coherent states are constructed as eigenstates of two pseudo-fermion annihilation operators. These coherent states form a bi-normal and bi-overcomplete system, and their evolution governed by the pseudo-Hermitian Hamiltonian is temporally stable. In terms of the introduced pseudo-fermion operators, the two-level system Hamiltonian takes a factorized form similar to that of a harmonic oscillator.
Pseudo-observations for competing risks with covariate dependent censoring
DEFF Research Database (Denmark)
Binder, Nadine; Gerds, Thomas A; Andersen, Per Kragh
2014-01-01
that the probability of not being lost to follow-up (un-censored) is independent of the covariates. Modified pseudo-values are proposed which rely on a correctly specified regression model for the censoring times. Bias and efficiency of these methods are compared in a simulation study. Further illustration...
Probing pseudo-Dirac neutrino through detection of neutrino ...
Indian Academy of Sciences (India)
The expected secondary muons from such neutrinos that can be detected by a kilometer scale detector such as ICECUBE is calculated and compared with the same in the case of mass-flavour oscillations and for no oscillation cases. The calculated muon yields indicate that to probe such small pseudo-Dirac splittings one ...
Probing pseudo-Dirac neutrino through detection of neutrino ...
Indian Academy of Sciences (India)
~EeV for such neutrinos invoke the likelihood to probe very small pseudo-Dirac splittings. The expected secondary muons from such neutrinos that can be detected by a kilometer scale detector such as ICECUBE is calculated and compared with the same in the case of mass-flavour oscillations and for no oscillation cases.
Production of bioethanol using agricultural waste: banana pseudo stem
Directory of Open Access Journals (Sweden)
Snehal Ingale
2014-09-01
Full Text Available India is amongst the largest banana (Musa acuminata producing countries and thus banana pseudo stem is commonly available agricultural waste to be used as lignocellulosic substrate. Present study focuses on exploitation of banana pseudo stem as a source for bioethanol production from the sugars released due to different chemical and biological pretreatments. Two fungal strains Aspergillus ellipticus and Aspergillus fumigatus reported to be producing cellulolytic enzymes on sugarcane bagasse were used under co-culture fermentation on banana pseudo stem to degrade holocellulose and facilitate maximum release of reducing sugars. The hydrolysate obtained after alkali and microbial treatments was fermented by Saccharomyces cerevisiae NCIM 3570 to produce ethanol. Fermentation of cellulosic hydrolysate (4.1 g% gave maximum ethanol (17.1 g/L with yield (84% and productivity (0.024 g%/h after 72 h. Some critical aspects of fungal pretreatment for saccharification of cellulosic substrate using A. ellipticus and A. fumigatus for ethanol production by S. cerevisiae NCIM 3570 have been explored in this study. It was observed that pretreated banana pseudo stem can be economically utilized as a cheaper substrate for ethanol production.
Over het specifieke- en pseudo cholinesterasegehalte bij enige ziekten
Strater, Hans
1948-01-01
De monographie van Libbrecht,,De arteriele hypertoniën"was voor ons de aanleiding om een onderzoek te doen over het specifieke en pseudo-cholinesterase bij verschillende vormen van hypertensie, myasthenie en asthma bronchiale. ... Zie: Samenvatting
Tropomyosin Ser-283 pseudo-phosphorylation slows myofibril relaxation.
Nixon, Benjamin R; Liu, Bin; Scellini, Beatrice; Tesi, Chiara; Piroddi, Nicoletta; Ogut, Ozgur; Solaro, R John; Ziolo, Mark T; Janssen, Paul M L; Davis, Jonathan P; Poggesi, Corrado; Biesiadecki, Brandon J
2013-07-01
Tropomyosin (Tm) is a central protein in the Ca(2+) regulation of striated muscle. The αTm isoform undergoes phosphorylation at serine residue 283. While the biochemical and steady-state muscle function of muscle purified Tm phosphorylation have been explored, the effects of Tm phosphorylation on the dynamic properties of muscle contraction and relaxation are unknown. To investigate the kinetic regulatory role of αTm phosphorylation we expressed and purified native N-terminal acetylated Ser-283 wild-type, S283A phosphorylation null and S283D pseudo-phosphorylation Tm mutants in insect cells. Purified Tm's regulate thin filaments similar to that reported for muscle purified Tm. Steady-state Ca(2+) binding to troponin C (TnC) in reconstituted thin filaments did not differ between the 3 Tm's, however disassociation of Ca(2+) from filaments containing pseudo-phosphorylated Tm was slowed compared to wild-type Tm. Replacement of pseudo-phosphorylated Tm into myofibrils similarly prolonged the slow phase of relaxation and decreased the rate of the fast phase without altering activation kinetics. These data demonstrate that Tm pseudo-phosphorylation slows deactivation of the thin filament and muscle force relaxation dynamics in the absence of dynamic and steady-state effects on muscle activation. This supports a role for Tm as a key protein in the regulation of muscle relaxation dynamics. Copyright © 2012 Elsevier Inc. All rights reserved.
Pseudo-Riemannian geometry, [delta]-invariants and applications
Chen, Bang-Yen
2011-01-01
The first part of this book provides a self-contained and accessible introduction to the subject in the general setting of pseudo-Riemannian manifolds and their non-degenerate submanifolds, only assuming from the reader some basic knowledge about manifold
Production of bioethanol using agricultural waste: banana pseudo stem.
Ingale, Snehal; Joshi, Sanket J; Gupte, Akshaya
2014-01-01
India is amongst the largest banana (Musa acuminata) producing countries and thus banana pseudo stem is commonly available agricultural waste to be used as lignocellulosic substrate. Present study focuses on exploitation of banana pseudo stem as a source for bioethanol production from the sugars released due to different chemical and biological pretreatments. Two fungal strains Aspergillus ellipticus and Aspergillus fumigatus reported to be producing cellulolytic enzymes on sugarcane bagasse were used under co-culture fermentation on banana pseudo stem to degrade holocellulose and facilitate maximum release of reducing sugars. The hydrolysate obtained after alkali and microbial treatments was fermented by Saccharomyces cerevisiae NCIM 3570 to produce ethanol. Fermentation of cellulosic hydrolysate (4.1 g%) gave maximum ethanol (17.1 g/L) with yield (84%) and productivity (0.024 g%/h) after 72 h. Some critical aspects of fungal pretreatment for saccharification of cellulosic substrate using A. ellipticus and A. fumigatus for ethanol production by S. cerevisiae NCIM 3570 have been explored in this study. It was observed that pretreated banana pseudo stem can be economically utilized as a cheaper substrate for ethanol production.
Pseudo-homophony in non-native listening
Cutler, A.; Otake, T.
2004-01-01
Pseudo-homophony may result when non-native listeners cannot distinguish phonemic contrasts. Thus Dutch listeners have difficulty distinguishing the vowels of English cattle versus kettle, because this contrast is subsumed by a single Dutch vowel category; in consequence, both words may be activated
Empirical pseudo-potential studies on electronic structure of ...
Indian Academy of Sciences (India)
Wintec
and the lowest unoccupied molecular orbital (LUMO) as a function of shape and size of the quantum dots. Our studies explain the ... Keywords. Quantum dots; empirical pseudo-potential; electronic structure; HOMO–LUMO gap. 1. Introduction ...... both the finite and infinite well EMA breaks down and introduces significant ...
Random matrix theory for pseudo-Hermitian systems: Cyclic blocks
Indian Academy of Sciences (India)
tems, and, for Hamiltonians that break parity P and time-reversal invariance T. In an attempt to understand the ... Keywords. Random matrices; circulants; quantum chaos; PT symmetry; pseudo-. Hermiticity. ... local fluctuation properties of complex quantum systems have universal properties, independent of the details of the ...
Status asthmaticus with pseudo-dextrocardia, complicated by ...
African Journals Online (AJOL)
A chest x-ray revealed pseudo-dextrocardia and air trapping (A). She did not respond to inhaled bronchodilator therapy. Intravenous hydrocortisone and magnesium sulphate were administered. The patient deteriorated and was subsequently ventilated and intravenous aminophylline initiated. After intubation and ventilation ...
To avoid operating on pseudo tumoral pulmonary infarctions ...
African Journals Online (AJOL)
Pulmonary infarction usually appears as a hump-shaped triangular opacity with its base applied to a pleural surface. In some cases, pulmonary infarctions may appear as a pseudo tumoral opacity mimicking lung cancer. Thoracotomy could be prevented by repeating CT scan in properly selected patients. Pan African ...
Contextuality in multipartite pseudo-telepathy graph games
Anshu, Anurag; Hoyer, Peter; Mhalla, Mehdi; Perdrix, Simon
2016-01-01
Analyzing pseudo-telepathy graph games, we propose a way to build contextuality scenarios exhibiting the quantum supremacy using graph states. We consider the combinatorial structures that generate equivalent scenarios. We introduce a new tool called multipartiteness width to investigate which scenarios are harder to decompose and show that there exist graphs generating scenarios with a linear multipartiteness width.
Pseudo-nitzschia blooms and physical oceanography off ...
African Journals Online (AJOL)
During three surveys conducted in early summer 1996, 1997 and 1998, high concentrations of. Pseudo-nitzschia spp. (values of up to 106 cells.l-1, but generally <105 cells.l-1) were present. P. pungens was dominant in 1996, whereas P. pseudodelicatissima was most abundant in 1997 and 1998. A. catenella was rare and ...
Mann iteration with errors for strictly pseudo-contractive mappings ...
African Journals Online (AJOL)
It is well known that any fixed point of a Lipschitzian strictly pseudo-contractive self mapping of a nonempty closed convex and bounded subset K of a Banach space X is unique [6] and may be norm approximated by an iterative procedure. In this paper, we show that Mann iteration with errors can be used to approximate the ...
Random matrix theory for pseudo-Hermitian systems: Cyclic blocks
Indian Academy of Sciences (India)
We discuss the relevance of random matrix theory for pseudo-Hermitian systems, and, for Hamiltonians that break parity and time-reversal invariance . In an attempt to understand the random Ising model, we present the treatment of cyclic asymmetric matrices with blocks and show that the nearest-neighbour spacing ...
Optimalisasi Desain Parameter Lapangan Untuk Data Resistivitas Pseudo 3D
Directory of Open Access Journals (Sweden)
. Makhrani
2013-05-01
Full Text Available Penelitian yang berjudul Optimalisasi Desain Parameter Lapangan Untuk Data Resistivitas Pseudo 3D dilakukan dengan tujuan memprediksi model geologi dan mengestimasi parameter-parameter geofisika, menentukan sensitivitas dari konfigurasi Wenner-Schlumberger dan Wenner dalam mendeteksi anomali, membuat Pseudo 3D dari profil 2D serta meningkatkan kemampuan dalam memilih parameter survei yang optimal berdasarkan perbandingan kekuatan signal yang diharapkan dan kharakteristik dari bising (noise. Proses pengambilan data dilakukan dengan menggunakan metode geolistrik konfigurasi Wenner-Schlumberger dan konfigurasi Wenner. Pengolahan data geolistrik resistivitas dalam penelitian ini diawali dengan pengolahan data sintetik hasil forward modeling. Data ini dapat dijadikan sebagai data masukan pada perangkat lunak Surfer 9 untuk menggambarkan profil 2D. Seluruh hasil inversi dalam bentuk profil 2D akan digabungkan sehingga menjadi profil pseudo 3D, proses ini akan dilakukan dengan menggunakan perangkat lunak Matlab R2008a. Kedua konfigurasi yang digunakan dalam penelitian ini masing-masing memiliki keunggulan dan kelemahan dalam hal sensitivitas, baik konfigurasi Wenner-Schlumberger maupun konfigurasi Wenner. Meskipun kedua konfigurasi mendeteksi anomali yang dibuat, namun konfigurasi Wenner-Schlumberger lebih menonjolkan anomali, baik pada data sintetik maupun pada hasil pengukuran. Selain itu, pembuatan pseudo 3D dari profil 2D dapat membantu dalam menginterpretasi data pada lintasan yang saling berpotongan.
Prediction of survival with alternative modeling techniques using pseudo values
T. van der Ploeg (Tjeerd); F.R. Datema (Frank); R.J. Baatenburg de Jong (Robert Jan); E.W. Steyerberg (Ewout)
2014-01-01
textabstractBackground: The use of alternative modeling techniques for predicting patient survival is complicated by the fact that some alternative techniques cannot readily deal with censoring, which is essential for analyzing survival data. In the current study, we aimed to demonstrate that pseudo
Cryptography, statistics and pseudo-randomness (Part 1)
Brands, S.; Gill, R.D.
1995-01-01
In the classical approach to pseudo-random number generators, a generator is considered to perform well if its output sequences pass a battery of statistical tests that has become standard. In recent years, it has turned out that this approach is not satisfactory. Many generators have turned out to
Twisted surfaces in the Pseudo-Galilean space
Directory of Open Access Journals (Sweden)
Ahmet Kazan
2017-10-01
Full Text Available In this paper, we construct the twisted surfaces according to the supporting plane and type of rotations in pseudo-Galilean space G13. Also, we find the Gaussian curvatures and mean curvatures of the different types of these twisted surfaces and draw some figures for these twisted surfaces.
Pseudo-affinity chromatography of rumen microbial cellulase on ...
African Journals Online (AJOL)
Pseudo affinity adsorption of bioproducts on Sepharose-cibacron blue F3-GA was subjected to rumen microbial enzyme evaluation through batch binding and column chromatography of cellulase. The results showed that homogenizing method had better performance in the release of enzyme, so that the amount of enzyme ...
Empirical pseudo-potential studies on electronic structure of ...
Indian Academy of Sciences (India)
Home; Journals; Bulletin of Materials Science; Volume 31; Issue 3. Empirical pseudo-potential studies on electronic structure of semiconducting quantum dots. Anjali Kshirsagar Neelesh ... Theoretical investigations of electronic structure of quantum dots is of current interest in nanophase materials. Empirical theories such ...
Pseudo-Meig's Syndrome associated with huge Uterine Leiomyoma ...
African Journals Online (AJOL)
Background: Pseudo-Meigs syndrome consists of pleural effusion, ascites, and benign tumors of the ovary other than fibromas. These benign tumors include the tumors of fallopian tube or uterus, mature teratomas, struma ovarii, and ovarian leiomyomas. In a postmenopausal woman presence of complex pelvic mass, ...
Pseudo-cryptanalysis of the Original Blue Midnight Wish
DEFF Research Database (Denmark)
Thomsen, Søren Steffen
2010-01-01
cryptanalysis on the original version of BMW, as submitted to the SHA-3 competition in October 2008. The attacks described are (near-)collision, preimage and second preimage attacks on the BMW compression function. These attacks can also be described as pseudo-attacks on the full hash function, i.e., as attacks...
Computing the Visibility Graph via Pseudo-triangulations
Pocchiola, Michel; Vegter, Gert
1995-01-01
We show that the k free bitangents of a collection of n pairwise disjoint convex plane sets can be computed in time O(k + n log n) and O(n) working space. The algorithm uses only one advanced data structure, namely a splittable queue. We introduce (weakly) greedy pseudo-triangulations, whose
Neuropathie optique compressive secondaire à une pseudo-tumeur ...
African Journals Online (AJOL)
Neuropathie optique compressive secondaire à une pseudo-tumeur inflammatoire. Wafa Ammari, Olfa Berriche, Olfa Berriche. Abstract. La neuropathie optique regroupe l'ensemble des lésions du nerf optique. Le diagnostic est habituellement clinique: diminution de l'acuité visuelle, altération de la vision des couleurs, ...
Pseudo-obstrucción intestinal crónica Chronic intestinal pseudo-obstruction
Directory of Open Access Journals (Sweden)
M. T. Muñoz
2007-02-01
Full Text Available El síndrome de pseudo-obstrucción intestinal crónica se caracteriza por la presencia de cuadros clínicos recidivantes que simulan una obstrucción intestinal pero en ausencia de proceso obstructivo anatómico. Es poco frecuente pero determina una alta morbilidad. Se origina como consecuencia de una alteración de la motilidad intestinal que no puede hacer progresar su contenido debido a la afectación de su componente muscular, neurológico o de ambos. Son más frecuentes los casos secundarios a un proceso sistémico pero cada vez se describen más cuadros debidos a la afectación primaria de dichos componentes. El desarrollo de técnicas manométricas e histológicas más específicas ha permitido aclarar la patogenia de algunos de estos síndromes, entre los que se incluyen las manifestaciones paraneoplásicas y las enfermedades mitocondriales. La expresión clínica es variable y depende de la causa y de la localización y extensión de la afectación. El diagnóstico de esta entidad es habitualmente difícil lo que origina que a estos pacientes se les practiquen cirugías innecesarias, se les etiquete como enfermos psiquiátricos y el diagnóstico se realice varios años después del inicio de los síntomas. El tratamiento se dirige a mejorar los síntomas y a mantener su estado nutricional mediante medidas dietético-nutricionales, fármacos y actitudes endoscópico-quirúrgicas. La complejidad de estos enfermos aconseja su seguimiento multidisciplinar.Chronic intestinal pseudo-obstruction (CIPO is a syndrome characterized by the presence of recurrent episodes of clinical intestinal obstruction in the absence of obstructive lesions. Although this syndrome is rare, it causes a high morbidity. It is caused by a disturbance of the intestinal motility, that results in a failure of the progression of the intestinal content. Basically, the failure of the intestinal motility is a consequence of muscular disorder, neurological disorder or both
Sutrakar, Vijay Kumar; Mahapatra, D Roy
2009-07-22
Extensive molecular dynamics (MD) simulations have been performed in a B2-NiAl nanowire using an embedded atom method (EAM) potential. We show a stress induced [Formula: see text]-centered-tetragonal (BCT) phase transformation and a novel temperature and cross-section dependent pseudo-elastic/pseudo-plastic recovery from such an unstable BCT phase with a recoverable strain of approximately 30% as compared to 5-8% in polycrystalline materials. Such a temperature and cross-section dependent pseudo-elastic/pseudo-plastic strain recovery can be useful in various interesting applications of shape memory and strain sensing in nanoscale devices. Effects of size, temperature, and strain rate on the structural and mechanical properties have also been analyzed in detail. For a given size of the nanowire the yield stress of both the B2 and the BCT phases is found to decrease with increasing temperature, whereas for a given temperature and strain rate the yield stress of both the B2 and the BCT phase is found to increase with increase in the cross-sectional dimensions of the nanowire. A constant elastic modulus of approximately 80 GPa of the B2 phase is observed in the temperature range of 200-500 K for nanowires of cross-sectional dimensions in the range of 17.22-28.712 A, whereas the elastic modulus of the BCT phase shows a decreasing trend with an increase in the temperature.
Rhodes, Kirsty M; Turner, Rebecca M; White, Ian R; Jackson, Dan; Spiegelhalter, David J; Higgins, Julian P T
2016-12-20
Many meta-analyses combine results from only a small number of studies, a situation in which the between-study variance is imprecisely estimated when standard methods are applied. Bayesian meta-analysis allows incorporation of external evidence on heterogeneity, providing the potential for more robust inference on the effect size of interest. We present a method for performing Bayesian meta-analysis using data augmentation, in which we represent an informative conjugate prior for between-study variance by pseudo data and use meta-regression for estimation. To assist in this, we derive predictive inverse-gamma distributions for the between-study variance expected in future meta-analyses. These may serve as priors for heterogeneity in new meta-analyses. In a simulation study, we compare approximate Bayesian methods using meta-regression and pseudo data against fully Bayesian approaches based on importance sampling techniques and Markov chain Monte Carlo (MCMC). We compare the frequentist properties of these Bayesian methods with those of the commonly used frequentist DerSimonian and Laird procedure. The method is implemented in standard statistical software and provides a less complex alternative to standard MCMC approaches. An importance sampling approach produces almost identical results to standard MCMC approaches, and results obtained through meta-regression and pseudo data are very similar. On average, data augmentation provides closer results to MCMC, if implemented using restricted maximum likelihood estimation rather than DerSimonian and Laird or maximum likelihood estimation. The methods are applied to real datasets, and an extension to network meta-analysis is described. The proposed method facilitates Bayesian meta-analysis in a way that is accessible to applied researchers. © 2016 The Authors. Statistics in Medicine Published by John Wiley & Sons Ltd. © 2016 The Authors. Statistics in Medicine Published by John Wiley & Sons Ltd.
Pseudo-Reimannian manifolds endowed with an almost para f-structure
Directory of Open Access Journals (Sweden)
Vladislav V. Goldberg
1985-01-01
Full Text Available Let M˜(U,Ω˜,η˜,ξ,g˜ be a pseudo-Riemannian manifold of signature (n+1,n. One defines on M˜ an almost cosymplectic para f-structure and proves that a manifold M˜ endowed with such a structure is ξ-Ricci flat and is foliated by minimal hypersurfaces normal to ξ, which are of Otsuki's type. Further one considers on M˜ a 2(n−1-dimensional involutive distribution P⊥ and a recurrent vector field V˜. It is proved that the maximal integral manifold M⊥ of P⊥ has V as the mean curvature vector (up to 1/2(n−1. If the complimentary orthogonal distribution P of P⊥ is also involutive, then the whole manifold M˜ is foliate. Different other properties regarding the vector field V˜ are discussed.
Pseudo sidescan images from backscatter amplitude data of the Hydrosweep multibean sonar system
Digital Repository Service at National Institute of Oceanography (India)
Kodagali, V.N.; Hagen, R.; Schenke, H.W.
Using the rms (root mean square) backscatter amplitude values, a procedure was evolved to generate pseudo sidescan images. A comparison of the pseudo sidescan image with actual Hydrosweep sidescan image, from an area covering a pear shaped seamount...
Regression analysis of restricted mean survival time based on pseudo-observations
DEFF Research Database (Denmark)
Andersen, Per Kragh; Hansen, Mette Gerster; Klein, John P.
censoring; hazard function; health economics; regression model; survival analysis; mean survival time; restricted mean survival time; pseudo-observations......censoring; hazard function; health economics; regression model; survival analysis; mean survival time; restricted mean survival time; pseudo-observations...
Regression Analysis of Restricted Mean Survival Time Based on Pseudo-Observations
DEFF Research Database (Denmark)
Andersen, Per Kragh; Hansen, Mette Gerster; Klein, John P.
2004-01-01
censoring; hazard function; health economics; mean survival time; pseudo-observations; regression model; restricted mean survival time; survival analysis......censoring; hazard function; health economics; mean survival time; pseudo-observations; regression model; restricted mean survival time; survival analysis...
INEXTENSIBLE FLOWS OF CURVES IN THE EQUIFORM GEOMETRY OF THE PSEUDO-GALILEAN SPACE G13
Directory of Open Access Journals (Sweden)
HANDAN OZTEKIN
2016-12-01
Full Text Available In this paper, we study inextensible ows of curves in 3-dimensional pseudo- Galilean space. We give necessary and sucient conditions for inextensible ows of curves according to equiform geometry in pseudo-Galilean space.
DEFF Research Database (Denmark)
Andersen, Per Kragh; Klein, John P.; Rosthøj, Susanne
2003-01-01
Generalised estimating equation; Generalised linear model; Jackknife pseudo-value; Logistic regression; Markov Model; Multi-state model......Generalised estimating equation; Generalised linear model; Jackknife pseudo-value; Logistic regression; Markov Model; Multi-state model...
A novel pseudo-complementary PNA G-C base pair
DEFF Research Database (Denmark)
Olsen, Anne G.; Dahl, Otto; Petersen, Asger Bjørn
2011-01-01
Pseudo-complementary oligonucleotide analogues and mimics provide novel opportunities for targeting duplex structures in RNA and DNA. Previously, a pseudo-complementary A-T base pair has been introduced. Towards sequence unrestricted targeting, a pseudo-complementary G-C base pair consisting...... of the unnatural nucleobases n6-methoxy-2,6-diaminopurine (previously described in a DNA context) and N4-benzoylcytosine is now presented for design of pseudo-complementary PNA oligomers (pcPNAs)....
Stagewise pseudo-value regression for time-varying effects on the cumulative incidence
DEFF Research Database (Denmark)
Zöller, Daniela; Schmidtmann, Irene; Weinmann, Arndt
2016-01-01
using a pseudo-value approach. For a grid of time points, the possibly unobserved binary event status is replaced by a jackknife pseudo-value based on the Aalen-Johansen method. We combine a stagewise regression technique with the pseudo-value approach to provide variable selection while allowing...
Biharmonic Submanifolds with Parallel Mean Curvature Vector in Pseudo-Euclidean Spaces
Energy Technology Data Exchange (ETDEWEB)
Fu, Yu, E-mail: yufudufe@gmail.com [Dongbei University of Finance and Economics, School of Mathematics and Quantitative Economics (China)
2013-12-15
In this paper, we investigate biharmonic submanifolds in pseudo-Euclidean spaces with arbitrary index and dimension. We give a complete classification of biharmonic spacelike submanifolds with parallel mean curvature vector in pseudo-Euclidean spaces. We also determine all biharmonic Lorentzian surfaces with parallel mean curvature vector field in pseudo-Euclidean spaces.
Pseudo-random mating populations. In celebration of the 80th anniversary of the Hardy-Weinberg law.
Li, C C
1988-07-01
That random mating leads to Hardy-Weinberg distribution of genotypes is well known. This report is to show that, if the deviations from random mating are of a certain pattern, the offspring generation will also be in Hardy-Weinberg proportions. This brings out the fact that random mating is a sufficient condition, not a necessary one, for the attainment of the Hardy-Weinberg proportions. Such nonrandom-mating populations are tentatively said to be pseudo-random mating. Pseudo-random-mating populations exist for both autosomal and sex-linked systems with two or multiple alleles. This report covers the basic case of a two-allele autosomal locus in detail, but the possible extension to two loci and cytonuclear systems have also been mentioned in discussion.
Chaos-based Pseudo-random Number Generation
Barakat, Mohamed L.
2014-04-10
Various methods and systems related to chaos-based pseudo-random number generation are presented. In one example, among others, a system includes a pseudo-random number generator (PRNG) to generate a series of digital outputs and a nonlinear post processing circuit to perform an exclusive OR (XOR) operation on a first portion of a current digital output of the PRNG and a permutated version of a corresponding first portion of a previous post processed output to generate a corresponding first portion of a current post processed output. In another example, a method includes receiving at least a first portion of a current output from a PRNG and performing an XOR operation on the first portion of the current PRNG output with a permutated version of a corresponding first portion of a previous post processed output to generate a corresponding first portion of a current post processed output.
International conference Fourier Analysis and Pseudo-Differential Operators
Turunen, Ville; Fourier Analysis : Pseudo-differential Operators, Time-Frequency Analysis and Partial Differential Equations
2014-01-01
This book is devoted to the broad field of Fourier analysis and its applications to several areas of mathematics, including problems in the theory of pseudo-differential operators, partial differential equations, and time-frequency analysis. This collection of 20 refereed articles is based on selected talks given at the international conference “Fourier Analysis and Pseudo-Differential Operators,” June 25–30, 2012, at Aalto University, Finland, and presents the latest advances in the field. The conference was a satellite meeting of the 6th European Congress of Mathematics, which took place in Krakow in July 2012; it was also the 6th meeting in the series “Fourier Analysis and Partial Differential Equations.”
Superconducting states in pseudo-Landau-levels of strained graphene.
Uchoa, Bruno; Barlas, Yafis
2013-07-26
We describe the formation of superconducting states in graphene in the presence of pseudo-Landau-levels induced by strain, when time reversal symmetry is preserved. We show that superconductivity in strained graphene is quantum critical when the pseudo-Landau-levels are completely filled, whereas at partial fillings superconductivity survives at weak coupling. In the weak coupling limit, the critical temperature scales linearly with the coupling strength and shows a sequence of quantum critical points as a function of the filling factor that can be accessed experimentally. We argue that superconductivity can be induced by electron-phonon coupling and that the transition temperature can be controlled with the amount of strain and with the filling fraction of the Landau levels.
Pseudo natural colour aerial imagery for urban and suburban mapping
DEFF Research Database (Denmark)
Knudsen, Thomas
2005-01-01
Due to their near-infrared data channel, digital airborne four-channel imagers provide a potentially good discrimination between vegetation and human-made materials, which is very useful in automated mapping. Due to their red, green and blue data channels, they also provide natural colour images......, which are very useful in traditional (manual) mapping. In this paper, an algorithm is described which provides an approximation to the spectral capabilities of the four-channel imagers by using a colour-infrared aerial photo as input. The algorithm is tailored to urban/suburban surroundings, where...... the quality of the generated (pseudo) natural colour images are fully acceptable for manual mapping. This brings the combined availability of near-infrared and (pseudo) natural colours within reach for mapping projects based on traditional photogrammetry, which is valuable since traditional analytical cameras...
Using of "pseudo-second-order model" in adsorption.
Ho, Yuh-Shan
2014-01-01
A research paper's contribution exists not only in its originality and creativity but also in its continuity and development for research that follows. However, the author easily ignores it. Citation error and quotation error occurred very frequently in a scientific paper. Numerous researchers use secondary references without knowing the original idea from authors. Sulaymon et al. (Environ Sci Pollut Res 20:3011-3023, 2013) and Spiridon et al. (Environ Sci Pollut Res 20:6367-6381, 2013) presented wrong pseudo-second-order models in Environmental Science and Pollution Research, vol. 20. This comment pointed the errors of the kinetic models and offered information for citing original idea of pseudo-second-order kinetic expression. In order to stop the proliferation of the mistake, it is suggested to cite the original paper for the kinetic model which provided greater accuracy and more details about the kinetic expression.
A pseudo-single-crystalline germanium film for flexible electronics
Energy Technology Data Exchange (ETDEWEB)
Higashi, H.; Yamada, S.; Kanashima, T.; Hamaya, K., E-mail: hamaya@ee.es.osaka-u.ac.jp [Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531 (Japan); Kasahara, K.; Park, J.-H.; Miyao, M. [Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395 (Japan); Kudo, K.; Okamoto, H.; Moto, K.; Tsunoda, I. [Kumamoto National College of Technology, 2659-2 Suya, Koshi, Kumamoto 861-1102 (Japan)
2015-01-26
We demonstrate large-area (∼600 μm), (111)-oriented, and high-crystallinity, i.e., pseudo-single-crystalline, germanium (Ge) films at 275 °C, where the temperature is lower than the softening temperature of a flexible substrate. A modulated gold-induced layer exchange crystallization method with an atomic-layer deposited Al{sub 2}O{sub 3} barrier and amorphous-Ge/Au multilayers is established. From the Raman measurements, we can judge that the crystallinity of the obtained Ge films is higher than those grown by aluminum-induced-crystallization methods. Even on a flexible substrate, the pseudo-single-crystalline Ge films for the circuit with thin-film transistor arrays can be achieved, leading to high-performance flexible electronics based on an inorganic-semiconductor channel.
Nearly pseudo-Kähler manifolds and related special holonomies
Schäfer, Lars
2017-01-01
Developing and providing an overview of recent results on nearly Kähler geometry on pseudo-Riemannian manifolds, this monograph emphasizes the differences with the classical Riemannian geometry setting. The focal objects of the text are related to special holonomy and Killing spinors and have applications in high energy physics, such as supergravity and string theory. Before starting into the field, a self-contained introduction to the subject is given, aimed at students with a solid background in differential geometry. The book will therefore be accessible to masters and Ph.D. students who are beginning work on nearly Kähler geometry in pseudo-Riemannian signature, and also to non-experts interested in gaining an overview of the subject. Moreover, a number of results and techniques are provided which will be helpful for differential geometers as well as for high energy physicists interested in the mathematical background of the geometric objects they need.
Chronic primary intestinal pseudo-obstruction from visceral myopathy.
Muñoz-Yagüe, M T; Marín, J C; Colina, F; Ibarrola, C; López-Alonso, G; Martín, M A; Solís-Herruzo, J A
2006-04-01
Chronic intestinal pseudo-obstruction is an uncommon syndrome characterized by relapsing episodes suggesting intestinal obstruction during which no mechanical causes are identified to account for symptoms. Etiologic factors may be manifold. Among them a number of neurologic conditions, gastrointestinal smooth muscle myopathies, endocrino-metabolic and autoimmune diseases, and the use of selected drugs stand out. We report a case of chronic intestinal pseudo-obstruction originating in a sporadic, primary intestinal myopathy that corresponds to no type thus far described. A histological study of the intestinal wall showed disrupted muscle bundles and the presence of interstitial edema. Myocytes had severe degenerative changes, and no alterations were seen in submucosal and myenteric plexus neurons. The activity of enzyme complexes in the mitochondrial respiratory chain, and of thymidine phosphorylase was normal. No mitochondrial DNA changes were seen.
Improving the pseudo-randomness properties of chaotic maps using deep-zoom.
Machicao, Jeaneth; Bruno, Odemir M
2017-05-01
A generalized method is proposed to compose new orbits from a given chaotic map. The method provides an approach to examine discrete-time chaotic maps in a "deep-zoom" manner by using k-digits to the right from the decimal separator of a given point from the underlying chaotic map. Interesting phenomena have been identified. Rapid randomization was observed, i.e., chaotic patterns tend to become indistinguishable when compared to the original orbits of the underlying chaotic map. Our results were presented using different graphical analyses (i.e., time-evolution, bifurcation diagram, Lyapunov exponent, Poincaré diagram, and frequency distribution). Moreover, taking advantage of this randomization improvement, we propose a Pseudo-Random Number Generator (PRNG) based on the k-logistic map. The pseudo-random qualities of the proposed PRNG passed both tests successfully, i.e., DIEHARD and NIST, and were comparable with other traditional PRNGs such as the Mersenne Twister. The results suggest that simple maps such as the logistic map can be considered as good PRNG methods.
The use of pseudo-equilibrium constant affords improved QSAR models of human plasma protein binding.
Zhu, Xiang-Wei; Sedykh, Alexander; Zhu, Hao; Liu, Shu-Shen; Tropsha, Alexander
2013-07-01
To develop accurate in silico predictors of Plasma Protein Binding (PPB). Experimental PPB data were compiled for over 1,200 compounds. Two endpoints have been considered: (1) fraction bound (%PPB); and (2) the logarithm of a pseudo binding constant (lnKa) derived from %PPB. The latter metric was employed because it reflects the PPB thermodynamics and the distribution of the transformed data is closer to normal. Quantitative Structure-Activity Relationship (QSAR) models were built with Dragon descriptors and three statistical methods. Five-fold external validation procedure resulted in models with the prediction accuracy (R²) of 0.67 ± 0.04 and 0.66 ± 0.04, respectively, and the mean absolute error (MAE) of 15.3 ± 0.2% and 13.6 ± 0.2%, respectively. Models were validated with two external datasets: 173 compounds from DrugBank, and 236 chemicals from the US EPA ToxCast project. Models built with lnKa were significantly more accurate (MAE of 6.2-10.7 %) than those built with %PPB (MAE of 11.9-17.6 %) for highly bound compounds both for the training and the external sets. The pseudo binding constant (lnKa) is more appropriate for characterizing PPB binding than conventional %PPB. Validated QSAR models developed herein can be applied as reliable tools in early drug development and in chemical risk assessment.
A mathematical model for a pseudo-plastic welding joint
Iosifescu, Oana; Juntharee, Pongpol; Licht, Christian; Michaille, Gérard
2009-01-01
An elementary situation in welding involves the perfect assembly of two adherents and a strong adhesive occupying a thin layer. The bulk energy density of the hyperelastic adherents grows superlinearly while that of the pseudo-plastic adhesive grows linearly with a stiffness of the order of the inverse of its thickness epsilon. We propose a simplified but accurate model by studying the asymptotic behavior, when epsilon goes to zero, through variational convergence methods: at the limit, the i...
La tuberculose abdominale pseudo-tumorale | El Barni | Pan African ...
African Journals Online (AJOL)
Même en l'absence d'antécédents de tuberculose pulmonaire, le diagnostic tuberculose abdominale pseudo-tumorale doit être évoqué surtout dans un pays d'endémie comme le notre et le recours à une laparotomie est justifié chaque fois que persiste un doute diagnostique ou en cas de complication. Pan African Medical ...
Les pseudo nodules thyroidiens | Chahed | Journal Tunisien d'ORL ...
African Journals Online (AJOL)
L'examen cytologique fait par une personne entraînée peut être contributif au diagnostic différentiel. Cependant, le diagnostic se fait souvent après cervicotomie exploratrice. Mots clés : pseudo- nodule, thyroïde, kyste hydatique, schwannome, adénome parathyroïdien, kyste du tractus thyréoglosse, chondrosarcome ...
mRNA-Producing Pseudo-nucleus System.
Shin, Seung Won; Park, Kyung Soo; Shin, Woo Jung; Um, Soong Ho
2015-11-04
A pseudo-eukaryotic nucleus (PEN) system consisting of a gene-containing DNA hydrogel encapsulated in a liposome is fabricated. Owing to the structural characteristics of gene-containing DNA hydrogel, mRNA transcription efficiency is promoted 2.57-fold. Through the use of PEN as a platform for mRNA delivery to the cytosol, prolonged protein translation is achieved. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Regression analysis of censored data using pseudo-observations
DEFF Research Database (Denmark)
Overgaard, Morten; Andersen, Per K.; Parner, Erik T.
2015-01-01
We present updated versions of the stpsurv, stpci, and stpmean commands, which were introduced in Parner and Andersen (2010, Stata Journal 10: 408–422), along with a new command, stplost. The commands generate pseudo-observations of the survival function, the cumulative incidence function under...... commands feature new options, an increase in computational speed, and the ability to handle survival data with delayed entry....
Core curriculum case illustration: blunt traumatic thoracic aortic pseudo aneurysm.
Ramzan, Muhammad Mubashir; Fadl, Shaimaa Abdelhassib; Robinson, Jeffrey D
2017-06-19
Core Curriculum Illustration: [blunt thoracic aortic pseudo aneurysm]. This is the [40th] installment of a series that will highlight one case per publication issue from the bank of cases available online as part of the American Society of Emergency Radiology (ASER) educational resources. Our goal is to generate more interest in and use of our online materials. To view more cases online, please visit the ASER Core Curriculum and Recommendations for Study online at: http://www.aseronline.org/curriculum/toc.html.
La forme pseudo tumorale de la tuberculose primitive du nasopharynx
African Journals Online (AJOL)
La tuberculose primitive du nasopharynx est rare, nous présentons deux observations révélées par un aspect pseudo tumoral et à travers lesquelles nous soulevons le problème de diagnostic différentiel avec les lésions malignes du nasopharynx. La première observation concerne un jeune patient de 22 ans hospitalisé ...
Top-Mode pseudo-Nambu-Goldstone Boson Higgs model
Fukano, Hidenori S.
2017-12-01
We discuss the Top-Mode pseudo-Nambu-Goldstone Boson Higgs (TMpNGBH) model which has recently been proposed as a variant of the top quark condensate model in light of the 125 GeV Higgs boson discovered at the LHC. In this talk, we focus on the vacuum alignment and the phenomenologies of characteristic particles of the TMpNGBH model.
Pseudo Knowledge Sharing: The Influence of Trust and Guanxi Orientation
See-Kwong Goh; Poh-Yee Nee
2015-01-01
Despite the fact that knowledge sharing has been deemed as a competitive advantage and business sustainability tools for organizations, however many researcher has underpinned the deleterious impact knowledge sharing can bring forth to an organization performance. To date, it is found that minimal empirical research has been devoted to the dark side of knowledge sharing activities. Thus, this present study aims to extend this aspect specifically on pseudo knowledge sharing (PKS). The present ...
Discrete Pseudo-SINR-Balancing Nonlinear Recurrent System
Directory of Open Access Journals (Sweden)
Zekeriya Uykan
2013-01-01
system and extend the results in Uykan (2009, which are for autonomous linear systems, to nonlinear case. The proposed system can be viewed as a discrete-time realization of a recently proposed continuous-time network in Uykan (2013. In this paper, we focus on discrete-time analysis and provide various novel key results concerning the discrete-time dynamics of the proposed system, some of which are as follows: (i the proposed system is shown to be stable in synchronous and asynchronous work mode in discrete time; (ii a novel concept called Pseudo-SINR (pseudo-signal-to-interference-noise ratio is introduced for discrete-time nonlinear systems; (iii it is shown that when the system states approach an equilibrium point, the instantaneous Pseudo-SINRs are balanced; that is, they are equal to a target value. The simulation results confirm the novel results presented and show the effectiveness of the proposed discrete-time network as applied to various associative memory systems and clustering problems.
Pseudo-Reference-Based Assembly of Vertebrate Transcriptomes
Directory of Open Access Journals (Sweden)
Kyoungwoo Nam
2016-02-01
Full Text Available High-throughput RNA sequencing (RNA-seq provides a comprehensive picture of the transcriptome, including the identity, structure, quantity, and variability of expressed transcripts in cells, through the assembly of sequenced short RNA-seq reads. Although the reference-based approach guarantees the high quality of the resulting transcriptome, this approach is only applicable when the relevant reference genome is present. Here, we developed a pseudo-reference-based assembly (PRA that reconstructs a transcriptome based on a linear regression function of the optimized mapping parameters and genetic distances of the closest species. Using the linear model, we reconstructed transcriptomes of four different aves, the white leg horn, turkey, duck, and zebra finch, with the Gallus gallus genome as a pseudo-reference, and of three primates, the chimpanzee, gorilla, and macaque, with the human genome as a pseudo-reference. The resulting transcriptomes show that the PRAs outperformed the de novo approach for species with within about 10% mutation rate among orthologous transcriptomes, enough to cover distantly related species as far as chicken and duck. Taken together, we suggest that the PRA method can be used as a tool for reconstructing transcriptome maps of vertebrates whose genomes have not yet been sequenced.
Evolution equations in generalized Stepanov-like pseudo almost automorphic spaces
Directory of Open Access Journals (Sweden)
Toka Diagana
2012-03-01
Full Text Available In this article, first we introduce and study the concept of $mathbb{S}_{gamma}^p$-pseudo almost automorphy (or generalized Stepanov-like pseudo almost automorphy, which is more general than the notion of Stepanov-like pseudo almost automorphy due to Diagana. We next study the existence of solutions to some classes of nonautonomous differential equations of Sobolev type in $mathbb{S}_{gamma}^p$-pseudo almost automorphic spaces. To illustrate our abstract result, we will study the existence and uniqueness of a pseudo almost automorphic solution to the heat equation with a negative time-dependent diffusion coefficient.
Pseudo spectral collocation with Maxwell polynomials for kinetic equations with energy diffusion
Sánchez-Vizuet, Tonatiuh; Cerfon, Antoine J.
2018-02-01
We study the approximation and stability properties of a recently popularized discretization strategy for the speed variable in kinetic equations, based on pseudo-spectral collocation on a grid defined by the zeros of a non-standard family of orthogonal polynomials called Maxwell polynomials. Taking a one-dimensional equation describing energy diffusion due to Fokker–Planck collisions with a Maxwell–Boltzmann background distribution as the test bench for the performance of the scheme, we find that Maxwell based discretizations outperform other commonly used schemes in most situations, often by orders of magnitude. This provides a strong motivation for their use in high-dimensional gyrokinetic simulations. However, we also show that Maxwell based schemes are subject to a non-modal time stepping instability in their most straightforward implementation, so that special care must be given to the discrete representation of the linear operators in order to benefit from the advantages provided by Maxwell polynomials.
Doubly stochastic (pseudo)gene expression in the regulation of cancer
Petrosyan, K. G.; Hu, Chin-Kun
2017-08-01
We extend a model of the regulation of cancer by gene and pseudogene messenger RNAs to take into account cell-to-cell variability. This introduces an additional randomness to the intensity of the intracellular noise. The intracellular stochasticity is modelled via an additive white noise source and the intercellular stochasticity, or randomness, is modelled via a steady-state Γ -distribution for the intracellular noise intensity. The doubly stochastic process is treated numerically and displays a difference compared with the single stochastic (pseudo)gene expression process, which is the randomness-induced shift of the onset of even-odd oscillations in the number of molecules. Similarities to experimental outcomes in the related literature are pointed out.
Adaptiveness in monotone pseudo-Boolean optimization and stochastic neural computation.
Grossi, Giuliano
2009-08-01
Hopfield neural network (HNN) is a nonlinear computational model successfully applied in finding near-optimal solutions of several difficult combinatorial problems. In many cases, the network energy function is obtained through a learning procedure so that its minima are states falling into a proper subspace (feasible region) of the search space. However, because of the network nonlinearity, a number of undesirable local energy minima emerge from the learning procedure, significantly effecting the network performance. In the neural model analyzed here, we combine both a penalty and a stochastic process in order to enhance the performance of a binary HNN. The penalty strategy allows us to gradually lead the search towards states representing feasible solutions, so avoiding oscillatory behaviors or asymptotically instable convergence. Presence of stochastic dynamics potentially prevents the network to fall into shallow local minima of the energy function, i.e., quite far from global optimum. Hence, for a given fixed network topology, the desired final distribution on the states can be reached by carefully modulating such process. The model uses pseudo-Boolean functions both to express problem constraints and cost function; a combination of these two functions is then interpreted as energy of the neural network. A wide variety of NP-hard problems fall in the class of problems that can be solved by the model at hand, particularly those having a monotonic quadratic pseudo-Boolean function as constraint function. That is, functions easily derived by closed algebraic expressions representing the constraint structure and easy (polynomial time) to maximize. We show the asymptotic convergence properties of this model characterizing its state space distribution at thermal equilibrium in terms of Markov chain and give evidence of its ability to find high quality solutions on benchmarks and randomly generated instances of two specific problems taken from the computational graph
Pseudo-acne fulminans associated with oral isotretinoin*
Grando, Luciana Rosa; Leite, Oriete Gerin; Cestari, Tania Ferreira
2014-01-01
Acne fulminans is a rare and serious condition characterized by the sudden onset of nodular and ulcerative acne lesions associated with systemic symptoms. It has been recognized a subset of patients with a sudden worsening of acne, often during treatment with oral isotretinoin, but without the strong presence of systemic involvement. Recognized by some authors as "pseudo-acne fulminans" or " acne fulminans sine fulminans," we report a case with these features in order to draw attention to the recognition and early management of this manifestation. PMID:25054758
[Hemopyrrollactamuria (HPU); from spots to pseudo-disease].
van der Meer, J W; van de Kerkhof, R; The, G K; Boers, G H
2003-09-06
In recent years, patients in the Netherlands confront their doctors with the diagnosis 'haemopyrollactamuria' (HPU), based on the presence of the haemopyrrollactam complex in their urine. The diagnosis is made by a commercial laboratory in the Netherlands (www.keac.nl). We have not been able to find peer-reviewed scientific literature on this metabolic disease. The haemopyrrollactam complex represents the so-called mauve spot, which was the subject of much controversy in schizophrenia research in the previous century. Reviewing all of the available data, we feel that HPU should be classified as a pseudo-disease.
Coherent imaging with pseudo-thermal incoherent light
DEFF Research Database (Denmark)
Gatti, A.; Bache, Morten; Magatti, D.
2006-01-01
We investigate experimentally fundamental properties of coherent ghost imaging using spatially incoherent beams generated from a pseudo-thermal source. A complementarity between the coher- ence of the beams and the correlation between them is demonstrated by showing a complementarity between ghost...... diffraction and ordinary diffraction patterns. In order for the ghost imaging scheme to work it is therefore crucial to have incoherent beams. The visibility of the information is shown for the ghost image to become better as the object size relative to the speckle size is decreased, and therefore...
Pseudo-compressibility methods for the incompressible flow equations
Turkel, Eli; Arnone, A.
1993-01-01
Preconditioning methods to accelerate convergence to a steady state for the incompressible fluid dynamics equations are considered. The analysis relies on the inviscid equations. The preconditioning consists of a matrix multiplying the time derivatives. Thus the steady state of the preconditioned system is the same as the steady state of the original system. The method is compared to other types of pseudo-compressibility. For finite difference methods preconditioning can change and improve the steady state solutions. An application to viscous flow around a cascade with a non-periodic mesh is presented.
Pseudo inputs for pairwise learning with Gaussian processes
DEFF Research Database (Denmark)
Nielsen, Jens Brehm; Jensen, Bjørn Sand; Larsen, Jan
2012-01-01
is based on a classical pairwise probit likelihood imposed with a Gaussian process prior. While extremely flexible, this non-parametric method struggles with an inconvenient O(n3) scaling in terms of the n input instances which limits the method only to smaller problems. To overcome this, we derive...... a specific sparse extension of the classical pairwise likelihood using the pseudo-input formulation. The behavior of the proposed extension is demonstrated on a toy example and on two real-world data sets which outlines the potential gain and pitfalls of the approach. Finally, we discuss the relation...
Displaced vertices from pseudo-Dirac dark matter
Davoli, Alessandro; De Simone, Andrea; Jacques, Thomas; Sanz, Verónica
2017-11-01
Displaced vertices are relatively unusual signatures for dark matter searches at the LHC. We revisit the model of pseudo-Dirac dark matter (pDDM), which can accommodate the correct relic density, evade direct detection constraints, and generically provide observable collider signatures in the form of displaced vertices. We use this model as a benchmark to illustrate the general techniques involved in the analysis, the complementarity between monojet and displaced vertex searches, and provide a comprehensive study of the current bounds and prospective reach.
Pseudo-Stem Banana Fibers: Characterization and Chromium Removal
Directory of Open Access Journals (Sweden)
Helena Becker
2013-11-01
Full Text Available In this work, pseudo-stems of the banana tree were collected, characterized and used as adsorbent materials for the removal of the chromium ions from aqueous solution. The characterization of pseudo-stems by FTIR suggests the presence of cellulose, hemicellulose and lignin. The predominant groups were carbonyls (0.312 ± 0.010 mmol g–1 adsorbent, phenols (0.237 ± 0.021 mmol g–1 adsorbent, lactones (0.041 ± 0.003 mmol g–1 adsorbent and basic groups (0.096 ± 0.006 mmol g–1 adsorbent. The textural propriety of the adsorbent, surface area, pore volume and pore diameter were found to be 0.383 m2 g–1, 0.003525 cm3 g–1 and 368.3 Å, respectively. The pHpzc value was found 7.5 and so the adsorption assays of chromium removal from solution were more efficiently at acidic pH values. The experiments show that approximately 95% and 78% of the Cr (VI was removed from solution by untreated and treated fiber, respectively, in 300 minutes of the contact time.
Pseudo-homophony in non-native listening
Cutler, Anne; Otake, Takashi
2004-05-01
Pseudo-homophony may result when non-native listeners cannot distinguish phonemic contrasts. Thus Dutch listeners have difficulty distinguishing the vowels of English cattle versus kettle, because this contrast is subsumed by a single Dutch vowel category; in consequence, both words may be activated whenever either is heard. A lexical decision study in English explored this phenomenon by testing for repetition priming. The materials contained among 340 items 18 pairs such as cattle/kettle, i.e., contrasting only in those vowels, and 18 pairs contrasting only in r/l (e.g., right/light). These materials, spoken by a native American English speaker, were presented to fluent non-native speakers of English, 48 Dutch Nijmegen University students, and 48 Japanese Dokkyo University students; the listeners performed lexical decision on each spoken item, and response time was measured. Dutch listeners responded significantly faster to one member of a cattle/kettle pair after having heard the other member earlier in the list (compared with having heard a control word), suggesting that both words had been activated whichever had been heard. Japanese listeners, however, showed no such priming for cattle/kettle words, but did show repetition priming across r/l pairs such as right/light. Non-native listeners' phonemic discrimination difficulties thus generate pseudo-homophony.
PRIMITIVE MATRICES AND GENERATORS OF PSEUDO RANDOM SEQUENCES OF GALOIS
Directory of Open Access Journals (Sweden)
A. Beletsky
2014-04-01
Full Text Available In theory and practice of information cryptographic protection one of the key problems is the forming a binary pseudo-random sequences (PRS with a maximum length with acceptable statistical characteristics. PRS generators are usually implemented by linear shift register (LSR of maximum period with linear feedback [1]. In this paper we extend the concept of LSR, assuming that each of its rank (memory cell can be in one of the following condition. Let’s call such registers “generalized linear shift register.” The research goal is to develop algorithms for constructing Galois and Fibonacci generalized matrix of n-order over the field , which uniquely determined both the structure of corresponding generalized of n-order LSR maximal period, and formed on their basis Galois PRS generators of maximum length. Thus the article presents the questions of formation the primitive generalized Fibonacci and Galois arbitrary order matrix over the prime field . The synthesis of matrices is based on the use of irreducible polynomials of degree and primitive elements of the extended field generated by polynomial. The constructing methods of Galois and Fibonacci conjugated primitive matrices are suggested. The using possibilities of such matrices in solving the problem of constructing generalized generators of Galois pseudo-random sequences are discussed.
Pseudo-creep in Shape Memory Alloy Wires and Sheets
Russalian, V. R.; Bhattacharyya, A.
2017-10-01
Interruption of loading during reorientation and isothermal pseudoelasticity in shape memory alloys with a strain arrest ( i.e., holding strain constant) results in a time-dependent evolution in stress or with a stress arrest ( i.e., holding stress constant) results in a time-dependent evolution in strain. This phenomenon, which we term as pseudo-creep, is similar to what was reported in the literature three decades ago for some traditional metallic materials undergoing plastic deformation. In a previous communication, we reported strain arrest of isothermal pseudoelastic loading, isothermal pseudoelastic unloading, and reorientation in NiTi wires as well as a rate-independent phase diagram. In this paper, we provide experimental results of the pseudo-creep phenomenon during stress arrest of isothermal pseudoelasticity and reorientation in NiTi wires as well as strain arrest of isothermal pseudoelasticity and reorientation in NiTi sheets. Stress arrest in NiTi wires accompanied by strain accumulation or recovery is studied using the technique of multi-video extensometry. The experimental results were used to estimate the amount of mechanical energy needed to evolve the wire from one microstructural state to another during isothermal pseudoelastic deformation and the difference in energies between the initial and the final rest state between which the aforementioned evolution has occurred.
Pseudo-Finslerian Space-Times and Multirefringence
Skákala, Jozef; Visser, Matt
Ongoing searches for a quantum theory of gravity have repeatedly led to the suggestion that space-time might ultimately be anisotropic (Finsler-like) and/or exhibit multirefringence (multiple signal cones). Multiple (and even anisotropic) signal cones can be easily dealt with in a unified manner, by writing down a single Fresnel equation to simultaneously encode all signal cones in an even-handed manner. Once one gets off the signal cone and attempts to construct a full multirefringent space-time metric the situation becomes more problematic. In the multirefringent case we shall report a significant no-go result: in multirefringent models there is no simple or compelling way to construct any unifying notion of pseudo-Finsler space-time metric, different from a monorefringenent model, where the signal cone structure plus a conformal factor completely specifies the full pseudo-Riemannian metric. To throw some light on this situation we use an analog model where both anisotropy and multirefringence occur simultaneously: biaxial birefringent crystal. But the significance of our results extends beyond the optical framework in which (purely for pedagogical reasons) we are working, and has implications for any attempt at introducing multirefringence and intrinsic anisotropies to any model of quantum gravity that has a low energy manifold-like limit.
Directory of Open Access Journals (Sweden)
Hui-Sheng Ding
2013-04-01
Full Text Available In this paper, we first introduce a new class of pseudo almost periodic type functions and investigate some properties of pseudo almost periodic type functions; and then we discuss the existence of pseudo almost periodic solutions to the class of abstract partial functional differential equations $x'(t=Ax(t+f(t,x_t$ with finite delay in a Banach space X.
ANALYSIS OF THE CHEMICAL COMPOSITION AND MORPHOLOGICAL STRUCTURE OF BANANA PSEUDO-STEM
Kun Li; Shiyu Fu; Huaiyu Zhan; Yao Zhan; Lucian A. Lucia
2010-01-01
An analysis of the chemical composition and anatomical structure of banana pseudo-stem was carried out using Light Microscopy (LM), Scanning Electron Microscopy (SEM), and Confocal Laser Scanning Microscopy (CLSM). The chemical analysis indicated there is a high holocellulose content and low lignin content in banana pseudo-stem compared with some other non-wood fiber resources. These results demonstrate that the banana pseudo-stem has potential value for pulping. In addition, we report for th...
Neutrosophic Regular Filters and Fuzzy Regular Filters in Pseudo-BCI Algebras
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Xiaohong Zhang
2017-09-01
Full Text Available Neutrosophic set is a new mathematical tool for handling problems involving imprecise, indeterminacy and inconsistent data. Pseudo-BCI algebra is a kind of non-classical logic algebra in close connection with various non-commutative fuzzy logics. Recently, we applied neutrosophic set theory to pseudo-BCI algebras. In this paper, we study neutrosophic filters in pseudo-BCI algebras.
Continuous curves of nonmetric pseudo-arcs and semi-conjugacies to interval maps
Boronski, Jan P.; Smith, Michel
2017-01-01
In 1985 M. Smith constructed a nonmetric pseudo-arc; i.e. a Hausdorff homogeneous, hereditary equivalent and hereditary indecomposable continuum. Taking advantage of a decomposition theorem of W. Lewis, he obtained it as a long inverse limit of metric pseudo-arcs with monotone bonding maps. Extending his approach, and the results of Lewis on lifting homeomorphisms, we construct a nonmetric pseudo-circle, and new examples of homogeneous 1-dimensional continua; e.g. a circle and solenoids of no...
Pseudo-arthrosis repair of a posterior cruciate ligament avulsion fracture
Hoogervorst, Paul; Gardeniers, J.W.M.; Moret-Wever, S.; Kampen, A. van
2010-01-01
A pseudo-arthrosis repair of a 4-year-old bony avulsion fracture of the PCL using a minimally invasive technique, screw fixation, and bone grafting is reported. The case presented seems to be rather unique due to the fragment size and the approach for pseudo-arthrosis repair. There was a good functional result following minimally invasive pseudo-arthrosis repair of a posterior cruciate ligament avulsion fracture. There are no previous reports of similar pseudo-arthrosis repairs, and other aut...
Um caso de pseudo-hermafrodita masculino em um suíno
Corcini, Carine Dahl; Leon, Priscila Marques Moura de; Rambo, Gissele; Santos, Elisa Caroline da Silva; Varela Júnior, Antonio Sergio; Moreira, Fabiana; Fernandes, Cristina Gevehr; Lucia Júnior, Thomaz
2009-01-01
Os termos pseudo-hermafrodita e intersexo são utilizados para se referir a animais com traços sexuais ambíguos. O diagnostico de pseudo-hermafrodita é baseado nos vestígios de gônadas e aspecto fenotípico do trato reprodutivo. Os pseudo-hermafroditas masculinos são aqueles que possuem somente testículo. Este trabalho relata um caso de pseudo-hermafrodita masculino em um suíno, cujo aparelho reprodutor foi colhido na linha de abate de um frigorífico. O animal, com idade de 150 dias...
Um caso de pseudo-hermafrodita masculino em um suíno
Corcini, Carine Dahl; Leon, Priscila Marques Moura; Rambo, Gissele; Santos, Elisa Caroline da Silva; Varela Junior, Antonio Sergio; Moreira, Fabiana; Fernandes, Cristina Gevehr; Lucia Junior, Thomaz
2009-01-01
Os termos pseudo-hermafrodita e intersexo são utilizados para se referir a animais com traços sexuais ambíguos. O diagnostico de pseudo-hermafrodita é baseado nos vestígios de gônadas e aspecto fenotípico do trato reprodutivo. Os pseudo-hermafroditas masculinos são aqueles que possuem somente testículo. Este trabalho relata um caso de pseudo-hermafrodita masculino em um suíno, cujo aparelho reprodutor foi colhido na linha de abate de um frigorífico. O animal, com idade de 150 dias e peso apro...
Development and Validation of A 3d Staggered Fourier Pseudo-spectral Method For Wave Modeling
Seriani, G.; Vuan, A.; Priolo, E.; Carcione, J.
We have developed and implemented an algorithm for the 3D forward modeling of seismic wave-fields in complex geological structures. The algorithm is based on the solution of the elastic full wave equation in heterogeneous media using the Fourier pseudo-spectral method. Numerical accuracy and computational efficiency have been improved using a staggered scheme and parallel implementation, respectively. The parallel code can handle both SHMEM and MPI libraries which allow to perform the computations whether using a single massive parallel computer or distributed PC- clusters. The wave equation is written in a displacement-velocity-stress formulation using the equation of conservation of momentum, and the stress-strain relations for an isotropic elastic medium undergoing infinitesimal deformation. In the time domain, the system of partial differential equations is integrated through a leap-frog finite dif- ference discrete scheme. Spatial derivatives are computed globally by using the FFT. Attenuation is accommodated at each time step by multiplying the stress and velocity field by the attenuation factor. The presence of a free surface is obtained by FFT zero- padding. Wave reflections from the model edges are removed by applying absorbing strips. A generalized moment-tensor source formulation is used to represent source mechanisms. The 3-D staggered Fourier pseudo-spectral method is validated with both analytical and numerical solutions. In particular, we have used as reference solutions the full wave-field in homogeneous and layered media computed by the Cagniard-de Hoop technique and the wave-number integration method, respectively. The compari- son showed that the time histories are in good agreement with the reference solutions. Moreover, because of the staggered approach, the three components of the wave-field are defined on dual meshes displaced by a half grid-step. Therefore three components records are recovered by a fast interpolation.
Cerasoli, Francesco; Iannella, Mattia; D'Alessandro, Paola; Biondi, Maurizio
2017-01-01
Boosted Regression Trees (BRT) is one of the modelling techniques most recently applied to biodiversity conservation and it can be implemented with presence-only data through the generation of artificial absences (pseudo-absences). In this paper, three pseudo-absences generation techniques are compared, namely the generation of pseudo-absences within target-group background (TGB), testing both the weighted (WTGB) and unweighted (UTGB) scheme, and the generation at random (RDM), evaluating their performance and applicability in distribution modelling and species conservation. The choice of the target group fell on amphibians, because of their rapid decline worldwide and the frequent lack of guidelines for conservation strategies and regional-scale planning, which instead could be provided through an appropriate implementation of SDMs. Bufo bufo, Salamandrina perspicillata and Triturus carnifex were considered as target species, in order to perform our analysis with species having different ecological and distributional characteristics. The study area is the "Gran Sasso-Monti della Laga" National Park, which hosts 15 Natura 2000 sites and represents one of the most important biodiversity hotspots in Europe. Our results show that the model calibration ameliorates when using the target-group based pseudo-absences compared to the random ones, especially when applying the WTGB. Contrarily, model discrimination did not significantly vary in a consistent way among the three approaches with respect to the tree target species. Both WTGB and RDM clearly isolate the highly contributing variables, supplying many relevant indications for species conservation actions. Moreover, the assessment of pairwise variable interactions and their three-dimensional visualization further increase the amount of useful information for protected areas' managers. Finally, we suggest the use of RDM as an admissible alternative when it is not possible to individuate a suitable set of species as a
Directory of Open Access Journals (Sweden)
Francesco Cerasoli
Full Text Available Boosted Regression Trees (BRT is one of the modelling techniques most recently applied to biodiversity conservation and it can be implemented with presence-only data through the generation of artificial absences (pseudo-absences. In this paper, three pseudo-absences generation techniques are compared, namely the generation of pseudo-absences within target-group background (TGB, testing both the weighted (WTGB and unweighted (UTGB scheme, and the generation at random (RDM, evaluating their performance and applicability in distribution modelling and species conservation. The choice of the target group fell on amphibians, because of their rapid decline worldwide and the frequent lack of guidelines for conservation strategies and regional-scale planning, which instead could be provided through an appropriate implementation of SDMs. Bufo bufo, Salamandrina perspicillata and Triturus carnifex were considered as target species, in order to perform our analysis with species having different ecological and distributional characteristics. The study area is the "Gran Sasso-Monti della Laga" National Park, which hosts 15 Natura 2000 sites and represents one of the most important biodiversity hotspots in Europe. Our results show that the model calibration ameliorates when using the target-group based pseudo-absences compared to the random ones, especially when applying the WTGB. Contrarily, model discrimination did not significantly vary in a consistent way among the three approaches with respect to the tree target species. Both WTGB and RDM clearly isolate the highly contributing variables, supplying many relevant indications for species conservation actions. Moreover, the assessment of pairwise variable interactions and their three-dimensional visualization further increase the amount of useful information for protected areas' managers. Finally, we suggest the use of RDM as an admissible alternative when it is not possible to individuate a suitable set of
Fully Digital Chaotic Oscillators Applied to Pseudo Random Number Generation
Mansingka, Abhinav S.
2012-05-01
adapted for pseudo random number generation by truncating statistically defective bits. Finally, a novel post-processing technique using the Fibonacci series is proposed and implemented with a non-autonomous driven hyperchaotic system to provide pseudo random number generators with high nonlinear complexity and controllable period length that enables full utilization of all branches of the chaotic output as statistically secure pseudo random output.
Energy Technology Data Exchange (ETDEWEB)
Yashchuk, Valeriy V.; McKinney, Wayne R.; Takacs, Peter Z.
2007-07-25
The task of designing high performance X-ray optical systemsrequires the development of sophisticated X-ray scattering calculationsbased on rigorous information about the optics. One of the mostinsightful approaches to these calculations is based on the powerspectral density (PSD) distribution of the surface height. The majorproblem of measurement of a PSD distribution with an interferometricand/or atomic force microscope arises due to the unknown ModulationTransfer Function (MTF) of the instruments. The MTF characterizes theperturbation of the PSD distribution at higher spatial frequencies. Here,we describe a new method and dedicated test surfaces for calibration ofthe MTF of a microscope. The method is based on use of a speciallydesigned Binary Pseudo-random (BPR) grating. Comparison of atheoretically calculated PSD spectrum of a BPR grating with a spectrummeasured with the grating provides the desired calibration of theinstrumental MTF. The theoretical background of the method, as well asresults of experimental investigations are presented.
Hybrid carbon nanostructure assemblage for high performance pseudo-capacitors
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A. K. Mishra
2012-06-01
Full Text Available Investigation of novel nanocomposites for pseudo-capacitors with high capacitance and energy density is the spotlight of current energy research. In the present work, hybrid carbon nanostructure assemblage of graphene and multiwalled carbon nanotubes has been used as carbon support to nanostructured RuO2 and polyaniline for high energy supercapacitors. Maximum specific capacitances of 110, 235 and 440 F g−1 at the voltage sweep rate of 10 mV s−1 and maximum energy densities of 7, 12.5 and 20.5 Wh kg−1 were observed for carbon assemblage and its RuO2 and polyanilne decorated nanocomposites, respectively, with 1M H2SO4 as electrolyte.
Pseudo Goldstone Bosons Phenomenology in Minimal Walking Technicolor
DEFF Research Database (Denmark)
Hapola, Tuomas; Mescia, Federico; Nardecchia, Marco
2012-01-01
We construct the non-linear realized Lagrangian for the Goldstone Bosons associated to the breaking pattern of SU(4) to SO(4). This pattern is expected to occur in any Technicolor extension of the standard model featuring two Dirac fermions transforming according to real representations of the un......We construct the non-linear realized Lagrangian for the Goldstone Bosons associated to the breaking pattern of SU(4) to SO(4). This pattern is expected to occur in any Technicolor extension of the standard model featuring two Dirac fermions transforming according to real representations...... of the underlying gauge group. We concentrate on the Minimal Walking Technicolor quantum number assignments with respect to the standard model symmetries. We demonstrate that for, any choice of the quantum numbers, consistent with gauge and Witten anomalies the spectrum of the pseudo Goldstone Bosons contains...
Understanding quantum non-locality through pseudo-telepathy game
Kunkri, Samir
2006-11-01
Usually by quantum non-locality we mean that quantum mechanics can not be replaced by local realistic theory. On the other hand this nonlocal feature of quantum mechanics can not be used for instantaneous communication and hence it respect Einstein's special theory of relativity. But still it is not trivial as proved by various quantum information processing using entangled states. Recently there have been studies of hypothetical non-local system again respecting no-signalling which is beyond quantum mechanics. Here we study the power of such a hypothetical nonlocal box first suggested by Popescu et.al. in the context of recently suggested pseudo-telepathy game constructed from a Kochen-Specker set.
Pseudo paths towards minimum energy states in network dynamics
Hedayatifar, L.; Hassanibesheli, F.; Shirazi, A. H.; Vasheghani Farahani, S.; Jafari, G. R.
2017-10-01
The dynamics of networks forming on Heider balance theory moves towards lower tension states. The condition derived from this theory enforces agents to reevaluate and modify their interactions to achieve equilibrium. These possible changes in network's topology can be considered as various paths that guide systems to minimum energy states. Based on this theory the final destination of a system could reside on a local minimum energy, ;jammed state;, or the global minimum energy, balanced states. The question we would like to address is whether jammed states just appear by chance? Or there exist some pseudo paths that bound a system towards a jammed state. We introduce an indicator to suspect the location of a jammed state based on the Inverse Participation Ratio method (IPR). We provide a margin before a local minimum where the number of possible paths dramatically drastically decreases. This is a condition that proves adequate for ending up on a jammed states.
Pseudo noise code and data transmission method and apparatus
Deerkoski, L. F. (Inventor)
1977-01-01
Pseudo noise ranging codes, having a predetermined chipping rate, and a pair of binary data sources, each having a bit rate no greater than one tenth the chipping rate, quadriphase, digitally modulate a suppressed carrier wave having a first frequency are examined. Two additional binary data sources, each having a bit rate that is not restricted by the chipping rate of the first carrier, quadriphase, digitally modulate a suppressed carrier wave having a second frequency. The first and second frequencies are only slightly displaced so that there is overlap in the frequency bands which modulate the two carriers. The two suppressed carrier waves are linearly combined and transmitted from a first station to a second station so that the amplitude of the transmitted first wave is controlled so as not to degrade the detectability of the second wave at the second station.
A Resource Guide for Debunking Astronomical Pseudo-Science
Fraknoi, A.
2008-11-01
Many of us who do public programs for the International Year of Astronomy are likely to meet people who have questions or want to challenge us about pseudo-scientific topics related to astronomy. Perhaps they have heard about the claim that the moon landings were a hoax, or have seen a light in the sky which puzzled them. Even those of us who have extensive training in astronomy often are not prepared for tackling such questions. To deal with such situations, here is a concise guide to printed and web resources that offer rational examination of some of these ``fiction science'' claims. This is not a complete list, but a ``first defense'' for beginners. A fuller version can be found at: http://www.astrosociety.org/education/resources/pseudobib.html
Hyperkalemia induced pseudo-myocardial infarction in septic shock
Directory of Open Access Journals (Sweden)
S E Pothiawala
2014-01-01
Full Text Available Hyperkalemia is an acute life-threatening disorder presenting to the emergency department. Patients with hyperkalemia may manifest characteristic electrocardiographic changes including tented T waves, widening of the QRS complex and loss of P waves, sine wave pattern and eventually asystole. There have been only few reports of hyperkalemia causing ST segment elevation on electrocardiogram simulating an acute myocardial infarction. This case describes pseudo-myocardial infarction due to hyperkalemia and septic shock. Rapid determination of serum potassium levels by bedside blood gas analyzers serves to be a useful guide. ST segment elevation related to hyperkalemia will resolve with successful reduction of the serum potassium levels by appropriate therapy. It is important for physicians to be aware of this condition as this will aid in initiating correct therapy and prevent the patient from unnecessary interventions and the associated risk of complications.
Radial artery pseudo aneurysm after percutaneous cannulation using Seldinger technique
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Anil Ranganath
2011-01-01
Full Text Available Cannulation of a peripheral artery in a patient allows for continuous blood pressure (BP monitoring and facilitates frequent arterial blood gas (ABG analysis. Complications include thrombosis, embolism risk, haemorrhage, sepsis, and formation of pseudo aneurysms. A 75-year-old male admitted via casualty with a collapse secondary to seizures. Patient was intubated and mechanically ventilated for 7 days. A right radial artery catheter was inserted on admission to casualty. The arterial catheter remained in situ for 7 days. Five days following its removal, the skin site appeared inflamed and a wound swab grew methicillin resistant Staphylococcus aureus (MRSA. Eight days later a distinct bulging of the radial artery was noticed. An ultrasound was done and it showed radial artery pseudoaneurysm, the diagnosis was confirmed by angiogram. Delayed radial artery pseudoaneurysm formation has only been reported in association with infection, and less than twenty of these cases have been reported in the literature.
Primordial GWs from universality classes of pseudo-scalar inflation
Pieroni, M.
2017-05-01
In this contribution we discuss the possibility of generating an observable gravitational wave (GW) background by coupling a pseudo-scalar inflaton to some Abelian gauge fields. This analysis is performed by dividing inflationary models into universality classes. We find that of the most promising scenario is a Starobinsky-like model, which may lead to the generation of observational signatures both in upcoming CMB detectors as well as for direct GW detectors. The signal which can be produced in these models would both be observable in ground-based detectors, such as advanced LIGO, and in space-based detectors, such as LISA. The complementarity between the CMB and direct GW detection may be used to extract informations on the microphysics of inflation. Interestingly the mechanism discussed in this contribution may also be relevant for the generation of Primordial Black Holes (PBHs).
Eyeball pseudo-muscular actuators for an android face
Carpi, Federico; De Rossi, Danilo
2005-05-01
The human attention system is based on the capability of the eye of focusing and tracking. These actions are performed by the eyeball muscle system, as a consequence of visual stimuli. The F.A.C.E. (Facial Automaton for Conveying Emotions) project at our lab concerns the development of an android face endowed with dynamic expressiveness and artificial vision. Aimed at realising an artificial attention system for such an automaton, we present here a study for the development of pseudo-muscular polymer actuators for its eyeballs. The system is based on the mimicry of the muscular architecture of the human eye. In particular, linear actuators made of dielectric elastomers have been designed to replicate actions exerted by the main ocular muscles.
Pseudo-template synthesis of gold nanoparticles based on polyhydrosilanes
Energy Technology Data Exchange (ETDEWEB)
Sacarescu, Liviu, E-mail: livius@icmpp.ro [Petru Poni Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, Iasi 700487 (Romania); Simionescu, Mihaela; Sacarescu, Gabriela [Petru Poni Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, Iasi 700487 (Romania)
2011-02-01
Highly stable colloidal gold nanoparticles are obtained in a pseudo-template system using a specific polyhydrosilane copolymeric structure. This process takes place in situ by microwaves activation of the polymer solution in a non-polar solvent followed by stirring with solid HAuCl{sub 4} in natural light. The experimental procedure is very simple and the resulted colloidal gold solution is indefinitely stable. The specific surface plasmon resonance absorption band of the gold nanoparticles is strongly red shifted and is strictly related to their size. AFM correlated with DLS analysis showed flattened round shaped colloidal polymer-gold nanoparticles with large diameters. SEM-EDX combined analysis reveals that the polysilane-gold nanoparticles show a natural tendency to auto-assemble in close packed structures which form large areas over the polymer film surface.
Neutrino Masses from a Pseudo-Dirac Bino.
Coloma, Pilar; Ipek, Seyda
2016-09-09
We show that, in U(1)_{R}-symmetric supersymmetric models, the bino and its Dirac partner (the singlino) can play the role of right-handed neutrinos and generate the neutrino masses and mixing, without the need for traditional bilinear or trilinear R-parity violating operators. The two particles form a pseudo-Dirac pair, the "biνo." An inverse seesaw texture is generated for the neutrino-biνo sector, and the lightest neutrino is predicted to be massless. Unlike in most models with heavy right-handed neutrinos, the biνo can be sizably produced at the LHC through its interactions with colored particles, while respecting low energy constraints from neutrinoless double-beta decay and charged lepton flavor violation.
Raise and collapse of pseudo Landau levels in graphene
Castro, Eduardo V.; Cazalilla, Miguel A.; Vozmediano, María A. H.
2017-12-01
Lattice deformations couple to the low-energy electronic excitations of graphene as vector fields similar to the electromagnetic potential. The observation of strain-induced pseudo Landau levels with scanning tunnel microscopy experiments has been one of the most exciting events in the history of graphene. Nevertheless, the experimental observation presents some ambiguities. Similar strain patterns show different images that are sometimes difficult to interpret. In this Rapid Communication, we show that, for some strain configurations, the deformation potential acts as a parallel electric field able to destabilize the Landau level structure via a mechanism identical to that occurring for real electromagnetic fields. This effect also alters the estimations of the value of the pseudomagnetic field, which can be significantly bigger. The mechanism applies equally if the electric field has an external origin, which opens the door to an electric control of giant pseudomagnetic fields in graphene.
COMPUTED TOMOGRAPHIC FEATURES OF INCISOR PSEUDO-ODONTOMAS IN PRAIRIE DOGS (CYNOMYS LUDOVICIANUS).
Pelizzone, Igor; Di Ianni, Francesco; Volta, Antonella; Gnudi, Giacomo; Manfredi, Sabrina; Bertocchi, Mara; Parmigiani, Enrico
2017-05-01
Maxillary incisor pseudo-odontomas are common in pet prairie dogs and can cause progressive respiratory obstruction, while mandibular pseudo-odontomas are rarely clinically significant. The aim of this retrospective cross-sectional study was to describe CT features of maxillary and mandibular incisor pseudo-odontomas vs. normal incisors in a group of pet prairie dogs. All pet prairie dogs with head CT scans acquired during the period of 2013-2015 were included. A veterinary radiologist who was aware of final diagnosis reviewed CT scans and recorded qualitative features of affected and normal incisors. Mean density values for the pulp cavity and palatal and buccal dentin were also recorded. A total of 16 prairie dogs were sampled (12 normal maxillary incisors, 20 confirmed maxillary incisor pseudo-odontomas, 20 normal mandibular incisors, 12 presumed mandibular incisor pseudo-odontomas). Maxillary incisors with confirmed pseudo-odontomas had a significantly hyperattenuating pulp and dentin in the reserve crown and apical zone, when compared to normal maxillary incisors. Pseudo-odontomas appeared as enlargements of the apical zone with a globular/multilobular hyperattenuating mass formation haphazardly arranged, encroaching on midline and growing caudally and ventrally. Presumed mandibular incisor pseudo-odontomas had similar CT characteristics. In 60% of prairie dogs with maxillary incisor pseudo-odontomas, the hard palate was deformed and the mass bulged into the oral cavity causing loss of the palatine bone. The common nasal meatus was partially or totally obliterated in 81.8% of prairie dogs with maxillary pseudo-odontomas. Findings supported the use of CT for characterizing extent of involvement and surgical planning in prairie dogs with pseudo-odontomas. © 2017 American College of Veterinary Radiology.
Physical Embodiment can Produce Robot Operator’s Pseudo Presence
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Kazuaki eTanaka
2015-05-01
Full Text Available Recent studies have focused on humanoid robots for improving distant communication. When a user talks with a remote conversation partner through a humanoid robot, the user can see the remote partner’s body motions with physical embodiment but not the partner’s current appearance. The physical embodiment existing in the same room with the user is the main feature of humanoid robots, but the effects on social telepresence, i.e. the sense of resembling face-to-face interaction, had not yet been well demonstrated. To find the effects, we conducted an experiment in which subjects talked with a partner through robots and various existing communication media (e.g. voice, avatar and video chats. As a result, we found that the physical embodiment enhances social telepresence. However, in terms of the degree of social telepresence, the humanoid robot remained at the same level as the partner’s live-video, since presenting partner’s appearance also enhances social telepresence. To utilize the anonymity of a humanoid robot, we proposed the way that produces pseudo presence that is the sense of interacting with a remote partner when they are actually interacting with an autonomous robot. Through the second experiment, we discovered that the subjects tended to evaluate the degree of pseudo presence of a remote partner based on their prior experience of watching the partner’s body motions reproduced by a robot. When a subject interacted with an autonomous robot after interacting with a teleoperated robot (i.e., a remote operator that is identical with the autonomous robot, the subjects tended to feel as if they were talking with a remote operator.
M. T. Muñoz-Yagüe; J. C. Marín; F. Colina; C. Ibarrola; López-Alonso, G.; Martín, M.A.; J. A. Solís Herruzo
2006-01-01
Chronic intestinal pseudo-obstruction is an uncommon syndrome characterized by relapsing episodes suggesting intestinal obstruction during which no mechanical causes are identified to account for symptoms. Etiologic factors may be manifold. Among them a number of neurologic conditions, gastrointestinal smooth muscle myopathies, endocrino-metabolic and autoimmune diseases, and the use of selected drugs stand out. We report a case of chronic intestinal pseudo-obstruction originating in a sporad...
Dapčević, Aleksandra; Poleti, Dejan; Karanović, Ljiljana; Rogan, Jelena; Dražič, Goran
2013-11-01
A series of polycrystalline samples containing sillenite-like (doped γ-Bi2O3) phases were prepared by high-temperature reactions from α-Bi2O3 powder and different oxides in six pseudo-binary Bi2O3-MxOy (M = Mn, Ti, V) and six pseudo-ternary Bi2O3-M1xOy-M2xOy (M1 = Pb, Zn, Ti and M2 = Zn, Ti, Si) systems. The products were characterized by XRD, SEM/EDX, HRTEM, SAED and DTA techniques. It is shown that for pseudo-binary systems, the phase composition of specimens depends on dopant content, while, for pseudo-ternary systems, depends on dopants radii, as well. In pseudo-binary systems, single-phase sillenites are obtained if the dopant content is in accordance with formula Bi12M4+O20, for M = Mn and Ti, and Bi(M0.85+)O, for M = V. However, two coexisting sillenite-like phases, doped compound and nominally undoped solid solution, are found if a half of that dopant quantity is applied. In pseudo-ternary systems, the phase-pure double-doped sillenite specimens are identified if ionic radii of dopants differ less than 40%. Otherwise, two coexisting sillenites were obtained. The possibility to prepare the undoped γ-Bi2O3 phase was also discussed.
Solitary structures in an inhomogeneous plasma with pseudo-potential approach
Shan, Shaukat Ali; Saleem, Hamid
2017-11-01
The set of nonlinear partial differential equations for the coupled ion acoustic and drift waves is reduced to the KdV equation, which is finally transformed into the form of energy integral equation of a pseudo particle in small amplitude limit. It is pointed out that this approach is convenient for choosing appropriate plasma parameters and numerically obtaining drift solitary wave profiles as compared to the solution of the KdV equation, particularly, in non-uniform plasmas. Electrons are assumed to follow the Kappa distribution function. It is found that the solitons amplitude decreases corresponding to steeper density and temperature gradients because of the restriction on the validity of local approximation. Deviation of electrons from thermal equilibrium distribution is supportive for the formation of electrostatic solitary structures by the coupled nonlinear ion acoustic and drift waves. The estimates of the width of the solitons formed by these coupled nonlinear electrostatic waves in the F-region ionosphere are found to be a few meters in agreement with the satellite observations.
Interstellar medium. Pseudo-three-dimensional maps of the diffuse interstellar band at 862 nm.
Kos, Janez; Zwitter, Tomaž; Wyse, Rosemary; Bienaymé, Olivier; Binney, James; Bland-Hawthorn, Joss; Freeman, Kenneth; Gibson, Brad K; Gilmore, Gerry; Grebel, Eva K; Helmi, Amina; Kordopatis, Georges; Munari, Ulisse; Navarro, Julio; Parker, Quentin; Reid, Warren A; Seabroke, George; Sharma, Sanjib; Siebert, Arnaud; Siviero, Alessandro; Steinmetz, Matthias; Watson, Fred G; Williams, Mary E K
2014-08-15
The diffuse interstellar bands (DIBs) are absorption lines observed in visual and near-infrared spectra of stars. Understanding their origin in the interstellar medium is one of the oldest problems in astronomical spectroscopy, as DIBs have been known since 1922. In a completely new approach to understanding DIBs, we combined information from nearly 500,000 stellar spectra obtained by the massive spectroscopic survey RAVE (Radial Velocity Experiment) to produce the first pseudo-three-dimensional map of the strength of the DIB at 8620 angstroms covering the nearest 3 kiloparsecs from the Sun, and show that it follows our independently constructed spatial distribution of extinction by interstellar dust along the Galactic plane. Despite having a similar distribution in the Galactic plane, the DIB 8620 carrier has a significantly larger vertical scale height than the dust. Even if one DIB may not represent the general DIB population, our observations outline the future direction of DIB research. Copyright © 2014, American Association for the Advancement of Science.
Ramos, A; Talaia, P; Queirós de Melo, F J
2016-01-01
The main goal of this work was to develop an approached model to study dynamic behavior and prediction of the stress distribution in an in vitro Charnley cemented hip arthroplasty. An alternative version of the described pseudo-dynamic procedure is proposed by using the time integration Newmark algorithm. An internal restoring force vector is numerically calculated from the displacement, velocity, and acceleration vectors. A numerical model of hip replacement was developed to analyze the deformation of a dynamically stressed structure for all time steps. The experimental measurement of resulting internal forces generated in the structure (internal restoring force vector) is the second fundamental step of the pseudo-dynamic procedure. These data (as a feedback) are used by the time integration algorithm, which allows updating of the structure's shape for the next displacement, velocity, and acceleration vectors. In the field of Biomechanics, the potentialities of this method contribute to the determination of a dynamically equivalent in vitro stress field of a cemented hip prosthesis; implant fitted in patients with a normal mobility or practice sports. Consequences of the stress distribution in the implant zone that underwent cyclic fatigue loads were also discussed by using a finite element model. Application of this method in Biomechanics appears as a useful tool in the approximate stress field characterization of the peak stress state. Results show a peak value around two times the static situation, more for making possible the prediction of future damage and a programed clinical examination in patients using hip prosthesis.
Pseudo-arthrosis repair of a posterior cruciate ligament avulsion fracture.
Hoogervorst, P.; Gardeniers, J.W.M.; Moret-Wever, S.; Kampen, A. van
2010-01-01
A pseudo-arthrosis repair of a 4-year-old bony avulsion fracture of the PCL using a minimally invasive technique, screw fixation, and bone grafting is reported. The case presented seems to be rather unique due to the fragment size and the approach for pseudo-arthrosis repair. There was a good
On pseudo-values for regression analysis in competing risks models
DEFF Research Database (Denmark)
Graw, F; Gerds, Thomas Alexander; Schumacher, M
2009-01-01
For regression on state and transition probabilities in multi-state models Andersen et al. (Biometrika 90:15-27, 2003) propose a technique based on jackknife pseudo-values. In this article we analyze the pseudo-values suggested for competing risks models and prove some conjectures regarding...
Returns to Education in Sri Lanka: A Pseudo-Panel Approach
Himaz, Rozana; Aturupane, Harsha
2016-01-01
This study employs a pseudo-panel approach to estimate the returns to education among income earners in Sri Lanka. Pseudo-panel data are constructed from nine repeated cross sections of Sri Lanka's Labor Force Survey data from 1997 to 2008, for workers born during 1953-1974. The results show that for males, one extra year of education increases…
Investigation of Pseudo-Active State in Z-Source Inverter
DEFF Research Database (Denmark)
Schaltz, Erik; Oprea, Octavian; Larsen, Lasse
2005-01-01
This paper introduces a new operating state of the Z-source inverter denoted the pseudo-active state. The pseudoactive state is a state that may boost the output voltage of the Zsource inverter to a level higher than expected. The influence of the pseudo-active state is investigated and an equation...
Cryptographic pseudo-random sequences from the chaotic Hénon ...
Indian Academy of Sciences (India)
Pseudo-random number sequences are useful in many applications including Monte-Carlo simulation, spread spectrum ... a pseudo-random binary sequence from the two-dimensional chaotic Hénon map is explored. ... is the Hénon map, a two-dimensional discrete-time nonlinear dynamical system represented by the state ...
Comparative analysis of chosen transforms in the context of de-noising harmonic signals
Directory of Open Access Journals (Sweden)
Artur Zacniewski
2015-09-01
Full Text Available In the article, comparison of popular transforms used i.a. in denoising harmonical signals was presented. The division of signals submitted to mathematical analysis was shown and chosen transforms such as Short Time Fourier Transform, Wigner-Ville Distribution, Wavelet Transform and Discrete Cosine Transform were presented. Harmonic signal with white noise added was submitted for research. During research, the parameters of noise were changed to analyze the effects of using particular transform on noised signal. The importance of right choice for transform and its parameters (different for particular kind of transform was shown. Small changes in parameters or different functions used in transform can lead to considerably different results.[b]Keywords[/b]: denoising of harmonical signals, wavelet transform, discrete cosine transform, DCT
Pseudo-turbulence intensity in mono-dispersed bubbly liquids
Zenit, R.; Martinez-Mercado, J.; Palacios-Morales, C. A.
2006-11-01
Experiments were performed to measure the mean and fluctuating velocities of both phases in a bubbly flow in a vertical column. Using water and water-glycerin mixtures, measurements were obtained for a range of Reynolds numbers from 10 to 500, corresponding to Weber numbers smaller than 2. A carefully designed bubble generator and the addition of a small amount of salt, produced a nearly mono-dispersed bubble size. Measurements of the bubble phase velocity were obtained using a dual impedance probe and through high speed digital video processing. A measurement of the fluctuating component of the liquid velocity was obtained using of a flying hotfilm technique. It was found that, for all cases, the mean bubble velocity decreases as mean gas volume fraction increases. The flow agitation, characterized by the velocity variance, both in the liquid and the bubble phases, increases with bubble concentration. Surprisingly, the pseudo-turbulent intensities are found to increase as the Reynolds number decreases. Direct comparisons with recent theoretical and computational studies for the same range of conditions will be presented.
PSEUDO-LENNOX SYNDROME: CLINICAL AND ELECTROENCEPHALOGRAPHIC CHARACTERISTICS
Directory of Open Access Journals (Sweden)
K. Yu. Mukhin
2016-01-01
Full Text Available Pseudo-Lennox syndrome (PLS, or atypical benign partial epilepsy of childhood, is a disease from a group of age-related epileptic encephalopathies with a phenomenon of continuous spike-wave activity during slow sleep, which manifests itself as frequent polymorphic focal motor and pseudogeneralized seizures, cognitive impairments, as well as regional and diffuse epileptiform activity on electroencephalogram (EEG by the morphology identical to that of benign epileptiform patterns of childhood. The disease was first described by J. Aicardi and J. J. Chevrie in 1982, based on a study of 7 cases. Its diagnostic complexity is the polymorphism of both epileptic seizures and EEG data, as well as low awareness of the syndrome among physicians and its absence in the international classification of epilepsies. The typical triad of seizures, which occurs in nearly 100 % of patients, encompasses focal motor paroxysms (identical to those as observed in Rolandic epilepsy, atypical absences, and atonic seizures. Seizures in PLS in its active period (generally up to 7–8 years are highly resistant to antiepileptic drugs. Only a few agents have been proven to be effective in PLS; these include valproates, succinimides, benzodiazepines, topiramate, and sulthiame. The frequency of seizures are noted to increase in patients with PLS treated with drugs, such as vigabatrin, gabapentin, lamotrigine, phenobarbital, or phenytoin. The author considers in detail the history of studies of the disease, clinical manifestations, diagnostic criteria, therapeutic approaches, and prognosis.
Symmetries of the pseudo-diffusion equation and related topics
Daboul, J.
2017-03-01
We show in details how to determine and identify the algebra g = {Ai} of the infinitesimal symmetry operators of the following pseudo-diffusion equation (PSDE) LQ ≡ [ {partial /{partial t} - 1/4( {{{partial ^2}}/{partial {x^2}} - 1/{{t^2}}{{partial ^2}}/{partial {p^2}}} )} ] Q( x, p, t) = 0. This equation describes the behavior of the Q functions in the ( x, p) phase space as a function of a squeeze parameter y, where t = e 2y. We illustrate how G i(λ) ≡ exp[λ A i] can be used to obtain interesting solutions. We show that one of the symmetry generators, A 4, acts in the ( x, p) plane like the Lorentz boost in ( x, t) plane. We construct the Anti-de-Sitter algebra so(3, 2) from quadratic products of 4 of the A i, which makes it the invariance algebra of the PSDE. We also discuss the unusual contraction of so(3, 1) to so(1, 1)∌ h2. We show that the spherical Bessel functions I 0( z) and K 0( z) yield solutions of the PSDE, where z is scaling and "twist" invariant.
Acid-base equilibria of multilayered pseudo-polyelectrolytes
Mateo, Ayeisca E.; Priefer, Ronny
2015-11-01
The use of weak polyelectrolytes in multilayer polymer systems provides a means of altering the physicochemical properties of these thin films. Previously, we have examined the limits of the polyanions by incorporating the pseudo-polyelectrolytes (pPE's), poly(4-vinylphenol) (PVPh) and poly[5-(2-trifluoromethyl-1,1,1-trifluoro-2-hydroxypropyl)-2-norbornene] (PNBHFA). These pPE's, although being polyacids, should have pKa values in the basic versus acidic pH range. In order to determine the pKa(app) value of these polymers, once multilayered onto Snowtex silica particles with the weak polyelectrolyte, poly(allylamine hydrochloride) (PAH), we employed zeta potential. PVPh demonstrated pKa(app) values ranging from 10.55 to 11.08 which varied based upon assembly pH conditions as well as layer number. PAH yielded pKa(app) values ranging between 9.81 and 10.99 when multilayered with PVPh and 9.91-11.04 when partnered with PNBHFA. However, from our study it would appear that PNBHFA does not interact with PAH electrostatically, but rather via H-bonding, and therefore should actually not be classified as a pPE.
Pseudo-accommodation with intraocular lenses implanted in the bag.
Altan-Yaycioglu, Rana; Gözüm, Nilüfer; Gücükoglu, Ahmet
2002-01-01
To evaluate the accommodation potential in eyes after intraocular lens in-the-bag implantation. Fifty-one consecutive patients were included in the study. Group 1 included 26 eyes that had phacoemulsification with continuous curvilinear capsulorhexis and in-the-bag implanted foldable IOL. Twenty-five eyes in Group 2 had capsulotomy with extracapsular cataract extraction and were implanted with polymethylmethacrylate IOL. Time elapsed from surgery was at least 6 months. There was no significant difference for age or gender between groups (P > .05). We measured accommodation amplitude and depth of the anterior chamber at distance and near fixation with an ultrasonic biometry device. The results were compared using the unpaired Student t-test. The anterior chamber depths while fixating at a distant object were not significantly different between groups (P>.05), however, at near the difference was statistically significant (P=.008). The change in depths between far and near fixation was significantly different (P=.002) and was more pronounced in the the capsulorhexis group (P < .001). The accommodation amplitudes in this group were significantly greater than in the capsulotomy group (P = .025). Patients who had uncomplicated small incision phacoemulsification surgery with continuous curvilinear capsulorhexis and in-the-bag implanted lens seemed to preserve some pseudo-accommodation after surgery.
The Flavor of the Composite Pseudo-Goldstone Higgs
Csaki, Csaba; Weiler, Andreas
2008-01-01
We study the flavor structure of 5D warped models that provide a dual description of a composite pseudo-Goldstone Higgs. We first carefully re-examine the flavor constraints on the mass scale of new physics in the standard Randall-Sundrum-type scenarios, and find that the KK gluon mass should generically be heavier than about 21 TeV. We then compare the flavor structure of the composite Higgs models to those in the RS model. We find new contributions to flavor violation, which while still are suppressed by the RS-GIM mechanism, will enhance the amplitudes of flavor violations. In particular, there is a kinetic mixing term among the SM fields which (although parametrically not enhanced) will make the flavor bounds even more stringent than in RS, and imply the KK gluon mass to be at least about 33 TeV. For both the RS and the composite Higgs models the flavor bounds could be stronger or weaker depending on the assumption on the value of the gluon boundary kinetic term. These strong bounds seem to imply that the...
Properties of а pseudo-harmonic function on closed domain
Directory of Open Access Journals (Sweden)
Ірина Аркадіївна Юрчук
2015-04-01
Full Text Available Let f be a pseudo-harmonic function defined on $k-$connected oriented closed domain D whose boundary consists of closed Jordan curves. We remind that this class of functions coincides with continuous functions which have a finitely many critical points at the interior of D each of them is saddle point and finitely many local extrema on its boundary.In this work, it is proved that closure of any component of family which is a diference between D and such connected components of level curves of critical or semiregular values of f which contain critical and boundary critical points is a closed domain having one of three types (a ring, a strip or a sector. For the first, its boundary consists of two connected components that have no common points with D and level curve at any inner point is homeomorphic to circle. As well as the second and third, their boundaries have one connected component and their level curves at any inner point are homeomorphic to a closed segment. There is difference between a number of arcs of boundary curves. If a domain is a strip, then its boundary contains two arcs that belong either one or two different boundary curves. If a domain is a sector, then its boundary contains one arc of some boundary curves. By author some statements used for main theorem proof are proved.
Discrete RNA libraries from pseudo-torsional space
Humphris-Narayanan, Elisabeth
2012-01-01
The discovery that RNA molecules can fold into complex structures and carry out diverse cellular roles has led to interest in developing tools for modeling RNA tertiary structure. While significant progress has been made in establishing that the RNA backbone is rotameric, few libraries of discrete conformations specifically for use in RNA modeling have been validated. Here, we present six libraries of discrete RNA conformations based on a simplified pseudo-torsional notation of the RNA backbone, comparable to phi and psi in the protein backbone. We evaluate the ability of each library to represent single nucleotide backbone conformations and we show how individual library fragments can be assembled into dinucleotides that are consistent with established RNA backbone descriptors spanning from sugar to sugar. We then use each library to build all-atom models of 20 test folds and we show how the composition of a fragment library can limit model quality. Despite the limitations inherent in using discretized libraries, we find that several hundred discrete fragments can rebuild RNA folds up to 174 nucleotides in length with atomic-level accuracy (libraries presented here could easily be incorporated into RNA structural modeling, analysis, or refinement tools. PMID:22425640
Pseudo-spin Winding Number in Hydrogenated Graphene
Bennaceur, Keyan; Guillemette, Jonathan; Lévesque, Pierre L.; Mahvash, Farzaneh; Proust, Cyril; Siaj, Mohamed; Martel, Richard; Gervais, Guillaume; Szkopek, Thomas
2014-03-01
The quantum Hall effect (QHE) has been previously observed in highly resistive hydrogenated graphene, with an estimated hydrogen coverage up to 0.1% that is sufficient to impart strongly insulating behaviour in zero magnetic field. The opening of an impurity induced gap in graphene upon hydrogenation is anticipated to break local sub-lattice symmetry, and it may thus alter the Berry phase of Shubnikov-de Haas (SdH) oscillations and lead to a different Landau level (LL) sequence. Here we report the observation of SdH oscillations in a magnetic field up to 55 Tesla in graphene samples hydrogenated to different degree. The low temperature electron mobility ranges from ~1 cm2 / V . s to ~1000 cm2 / V . s . Analysis of SdH oscillation frequency in 1/B indicates that the LL sequence remains four-fold degenerate. We also observe the ν = 2 Hall plateau in all samples. We therefore conclude that the topological part of the Berry phase, meaning the pseudo-spin winding number that determines the LL sequence, is preserved in hydrogenated graphene.
Functional symptoms in clinically definite MS--pseudo-relapse syndrome.
LENUS (Irish Health Repository)
Merwick, A
2012-02-03
Although the diagnostic criteria for multiple sclerosis (MS) have become more formalized and sensitive in the era of magnetic resonance imaging (MRI) scanning, the assessment of individual relapses may not always be straightforward or easily linked to a particular lesion seen on imaging. In addition, acute episodes often have to be assessed outside of normal working hours or when the individual patients usual medical team is not available. Often the emergency department physicians have little formal neurological training and are under time pressure to get patients through the system as quickly as possible. It is therefore possible to mislabel functional symptoms as being true relapses. To illustrate scenarios of possible pseudo-relapse, three clinical vignettes are described. Misclassification of functional symptoms as relapse carries a number of inherent risks. Functional symptoms can be multifactorial and may cause a burden of disease. A multidisciplinary approach may be useful in minimizing unnecessary harm and identify if there is more than meets the eye to an episode of clinical deterioration.
Syngeneic AAV Pseudo-particles Potentiate Gene Transduction of AAV Vectors.
Wang, Qizhao; Dong, Biao; Pokiniewski, Katie A; Firrman, Jenni; Wu, Zhongren; Chin, Mario P S; Chen, Xiongwen; Liu, LinShu; Xu, Ruian; Diao, Yong; Xiao, Weidong
2017-03-17
Adeno-associated virus (AAV) vectors have emerged as a safe and efficient gene therapy platform. One complication is that a significant amount of empty particles have always been generated as impurities during AAV vector production. However, the effects of such particles on AAV vector performance remain unclear. Here we systemically evaluated the biological properties of three types of "empty" AAV particles: syngeneic pseudo-vectors with partial AAV genomes derived from DNA of the corresponding full particles, allogeneic pseudo-vectors with partial genomes different from the corresponding full particles, and null pseudo-vectors with no DNA inside the capsids. The syngeneic particles in excess increased the corresponding full AAV vector transgene expression both in vivo and in vitro. However, such effects were not observed with null or allogeneic particles. The observed differences among these pseudo-AAV particles may be ascribed to the syngeneic pseudo-vector DNA facilitating the complementary DNA synthesis of the corresponding full AAV particles. Our study suggests that the DNA content in the pseudo-vectors plays a key role in dictating their effects on AAV transduction. The effects of residual "empty" particles should be adequately assessed when comparing AAV vector performance. The syngeneic AAV pseudo-vectors may be used to enhance the efficacy of gene therapy.
Syngeneic AAV Pseudo-particles Potentiate Gene Transduction of AAV Vectors
Directory of Open Access Journals (Sweden)
Qizhao Wang
2017-03-01
Full Text Available Adeno-associated virus (AAV vectors have emerged as a safe and efficient gene therapy platform. One complication is that a significant amount of empty particles have always been generated as impurities during AAV vector production. However, the effects of such particles on AAV vector performance remain unclear. Here we systemically evaluated the biological properties of three types of “empty” AAV particles: syngeneic pseudo-vectors with partial AAV genomes derived from DNA of the corresponding full particles, allogeneic pseudo-vectors with partial genomes different from the corresponding full particles, and null pseudo-vectors with no DNA inside the capsids. The syngeneic particles in excess increased the corresponding full AAV vector transgene expression both in vivo and in vitro. However, such effects were not observed with null or allogeneic particles. The observed differences among these pseudo-AAV particles may be ascribed to the syngeneic pseudo-vector DNA facilitating the complementary DNA synthesis of the corresponding full AAV particles. Our study suggests that the DNA content in the pseudo-vectors plays a key role in dictating their effects on AAV transduction. The effects of residual “empty” particles should be adequately assessed when comparing AAV vector performance. The syngeneic AAV pseudo-vectors may be used to enhance the efficacy of gene therapy.
Directory of Open Access Journals (Sweden)
Gianpaolo Evangelista
2001-03-01
Full Text Available Voiced musical sounds have nonzero energy in sidebands of the frequency partials. Our work is based on the assumption, often experimentally verified, that the energy distribution of the sidebands is shaped as powers of the inverse of the distance from the closest partial. The power spectrum of these pseudo-periodic processes is modeled by means of a superposition of modulated 1/f components, that is, by a pseudo-periodic 1/f-like process. Due to the fundamental selfsimilar character of the wavelet transform, 1/f processes can be fruitfully analyzed and synthesized by means of wavelets. We obtain a set of very loosely correlated coefficients at each scale level that can be well approximated by white noise in the synthesis process.
Energy Technology Data Exchange (ETDEWEB)
Barber, Samuel K.; Anderson, Erik H.; Cambie, Rossana; Marchesini, Stefano; McKinney, Wayne R.; Takacs, Peter Z.; Voronov, Dmitry L.; Yashchuk, Valeriy V.
2010-03-31
The major problem of measurement of a power spectral density (PSD) distribution of surface heights with surface profilometers arises due to the unknown Modulation Transfer Function (MTF) of the instruments, which tends to distort the PSD at higher spatial frequencies. The special mathematical properties of binary pseudo-random patterns make them an ideal basis for developing MTF calibration test surfaces. Two-dimensional binary pseudo-random arrays (BPRAs) have been fabricated and used for the MTF calibration of the MicroMap{trademark}-570 interferometric microscope with all available objectives. An investigation into the effects of fabrication imperfections on the quality of the MTF calibration and a procedure for accounting for such imperfections are presented.
Fernandes, Luciano F; Hubbard, Katherine A; Richlen, Mindy L; Smith, Juliette; Bates, Stephen S; Ehrman, James; Léger, Claude; Mafra, Luiz L; Kulis, David; Quilliam, Michael; Libera, Katie; McCauley, Linda; Anderson, Donald M
2014-05-01
15 most toxic isolates corresponded to P. seriata, P. sp. GOM and P. pungens, and fg DA cell(-1) was determined for whole cultures (cells and medium) using ELISA and liquid chromatography (LC) with fluorescence detection (FLD); for seven isolates, toxin levels were also estimated using LC - with mass spectrometry and ultraviolet absorbance detection. Pseudo-nitzschia seriata was the most toxic species (up to 3,500 fg cell(-1)) and was observed in the GOM region during all cruises (i.e., during the months of April, May, June and October). Pseudo-nitzschia sp. GOM, observed only during September and October 2007, was less toxic (19 - 380 fg cell(-1)) than P. seriata but more toxic than P. pungens var. pungens (0. 4 fg cell(-1)). Quantitation of DA indicated that concentrations measured by LC and ELISA were positively and significantly correlated; the lower detection limit of the ELISA permitted quantification of toxicity in isolates that were found to be nontoxic with LC methods. The confirmation of at least seven toxic species and the broad spatial and temporal distribution of toxic Pseudo-nitzschia spp. have significant implications for the regional management of nearshore and offshore shellfisheries resources.
Superluminal propagation of pulsed pseudo-thermal light in atomic vapor.
Bae, In-Ho; Cho, Young-Wook; Lee, Hee Jung; Kim, Yoon-Ho; Moon, Han Seb
2010-09-13
We report an experimental demonstration of slow and superluminal propagation of pseudo-thermal (chaotic) light in the Λ-type system of the 5S(1/2)-5P(1/2) transition of (87)Rb atom. The slowed propagation of pulsed pseudo-thermal light was demonstrated in an electromagnetically-induced transparency medium while the superluminal propagation was demonstrated with the enhanced absorption scheme where the coupling field takes the form of a standing wave.We have also demonstrated that the photon number statistics of the pseudo-thermal light is preserved for both the subluminal and superluminal cases.
Winning strategies for pseudo-telepathy games using single non-local box
Kunkri, Samir; Kar, Guruprasad; Ghosh, Sibasish; Roy, Anirban
2006-01-01
Using a single NL-box, a winning strategy is given for the impossible colouring pseudo-telepathy game for the set of vectors having Kochen-Specker property in four dimension. A sufficient condition to have a winning strategy for the impossible colouring pseudo-telepathy game for general $d$-dimension, with single use of NL-box, is then described. It is also shown that the magic square pseudo-telepathy game of any size can be won by using just two ebits of entanglement -- for quantum strategy,...
Kumar, Amit; Tandon, Pradeep; Singh, Gyan P
2013-01-01
Class III malocclusion has been divided into two subtypes: skeletal and pseudo-Class III. A pseudo Class III malocclusion should be treated as early as possible to reduce the functional shift of the mandible and increase maxillary arch length. A case of pseudo-Class III malocclusion was presented here. A 11-year-old boy came with an anterior cross bite, the treatment was done with Fixed appliance (Roth prescription) and Reverse Twin block therapy. This case demonstrated that an anterior cross bite was corrected after 10 months of treatment.
Optimal Design of Passive Power Filters Based on Pseudo-parallel Genetic Algorithm
Li, Pei; Li, Hongbo; Gao, Nannan; Niu, Lin; Guo, Liangfeng; Pei, Ying; Zhang, Yanyan; Xu, Minmin; Chen, Kerui
2017-05-01
The economic costs together with filter efficiency are taken as targets to optimize the parameter of passive filter. Furthermore, the method of combining pseudo-parallel genetic algorithm with adaptive genetic algorithm is adopted in this paper. In the early stages pseudo-parallel genetic algorithm is introduced to increase the population diversity, and adaptive genetic algorithm is used in the late stages to reduce the workload. At the same time, the migration rate of pseudo-parallel genetic algorithm is improved to change with population diversity adaptively. Simulation results show that the filter designed by the proposed method has better filtering effect with lower economic cost, and can be used in engineering.
On the method of pseudo compressibility for numerically solving incompressible flows
Chang, J. L. C.; Kwak, D.
1984-01-01
Pseudo compressibility is used for numerically solving incompressible flows to achieve computational efficiency. The use of pseudo compressibility results in a system of hyperbolic-type equations of motion that introduce waves of finite speed. The interactions of the wave propagation and the vorticity spreading are analyzed. A criterion governing the dependence of the pseudo compressiblity on the Reynolds number and the characteristic length of the flow geometry is obtained that allows for a proper convergence. It is demonstrated that the solution does tend to the incompressible limit. External and internal viscous flow test problems are presented to verify the theory.
Least squares deconvolution for leak detection with a pseudo random binary sequence excitation
Nguyen, Si Tran Nguyen; Gong, Jinzhe; Lambert, Martin F.; Zecchin, Aaron C.; Simpson, Angus R.
2018-01-01
Leak detection and localisation is critical for water distribution system pipelines. This paper examines the use of the time-domain impulse response function (IRF) for leak detection and localisation in a pressurised water pipeline with a pseudo random binary sequence (PRBS) signal excitation. Compared to the conventional step wave generated using a single fast operation of a valve closure, a PRBS signal offers advantageous correlation properties, in that the signal has very low autocorrelation for lags different from zero and low cross correlation with other signals including noise and other interference. These properties result in a significant improvement in the IRF signal to noise ratio (SNR), leading to more accurate leak localisation. In this paper, the estimation of the system IRF is formulated as an optimisation problem in which the l2 norm of the IRF is minimised to suppress the impact of noise and interference sources. Both numerical and experimental data are used to verify the proposed technique. The resultant estimated IRF provides not only accurate leak location estimation, but also good sensitivity to small leak sizes due to the improved SNR.
Pseudo-inverse linear discriminants for the improvement of overall classification accuracies.
Daqi, Gao; Ahmed, Dastagir; Lili, Guo; Zejian, Wang; Zhe, Wang
2016-09-01
This paper studies the learning and generalization performances of pseudo-inverse linear discriminant (PILDs) based on the processing minimum sum-of-squared error (MS(2)E) and the targeting overall classification accuracy (OCA) criterion functions. There is little practicable significance to prove the equivalency between a PILD with the desired outputs in reverse proportion to the number of class samples and an FLD with the totally projected mean thresholds. When the desired outputs of each class are assigned a fixed value, a PILD is partly equal to an FLD. With the customarily desired outputs {1, -1}, a practicable threshold is acquired, which is only related to sample sizes. If the desired outputs of each sample are changeable, a PILD has nothing in common with an FLD. The optimal threshold may thus be singled out from multiple empirical ones related to sizes and distributed regions. Depending upon the processing MS(2)E criteria and the actually algebraic distances, an iterative learning strategy of PILD is proposed, the outstanding advantages of which are with limited epoch, without learning rate and divergent risk. Enormous experimental results for the benchmark datasets have verified that the iterative PILDs with optimal thresholds have good learning and generalization performances, and even reach the top OCAs for some datasets among the existing classifiers. Copyright © 2016 Elsevier Ltd. All rights reserved.
Pseudo-random dynamic address configuration (PRDAC) algorithm for mobile ad hoc networks
Wu, Shaochuan; Tan, Xuezhi
2007-11-01
By analyzing all kinds of address configuration algorithms, this paper provides a new pseudo-random dynamic address configuration (PRDAC) algorithm for mobile ad hoc networks. Based on PRDAC, the first node that initials this network randomly chooses a nonlinear shift register that can generates an m-sequence. When another node joins this network, the initial node will act as an IP address configuration sever to compute an IP address according to this nonlinear shift register, and then allocates this address and tell the generator polynomial of this shift register to this new node. By this means, when other node joins this network, any node that has obtained an IP address can act as a server to allocate address to this new node. PRDAC can also efficiently avoid IP conflicts and deal with network partition and merge as same as prophet address (PA) allocation and dynamic configuration and distribution protocol (DCDP). Furthermore, PRDAC has less algorithm complexity, less computational complexity and more sufficient assumption than PA. In addition, PRDAC radically avoids address conflicts and maximizes the utilization rate of IP addresses. Analysis and simulation results show that PRDAC has rapid convergence, low overhead and immune from topological structures.
Chander, Gyanesh; Angal, Amit; Xiong, Xiaoxiong (.; Helder, Dennis L.; Mishra, Nischal; Choi, Taeyoung (.; Wu, Aisheng
2010-10-01
Test sites are central to any future quality assurance and quality control (QA/QC) strategy. The Committee on Earth Observation Satellites (CEOS) Working Group for Calibration and Validation (WGCV) Infrared Visible Optical Sensors (IVOS) worked with collaborators around the world to establish a core set of CEOS-endorsed, globally distributed, reference standard test sites (both instrumented and pseudo-invariant) for the post-launch calibration of space-based optical imaging sensors. The pseudo-invariant calibration sites (PICS) have high reflectance and are usually made up of sand dunes with low aerosol loading and practically no vegetation. The goal of this paper is to provide preliminary assessment of "several parameters" than can be used on an operational basis to compare and measure usefulness of reference sites all over the world. The data from Landsat 7 (L7) Enhanced Thematic Mapper Plus (ETM+) and the Earth Observing-1 (EO-1) Hyperion sensors over the CEOS PICS were used to perform a preliminary assessment of several parameters, such as usable area, data availability, top-of-atmosphere (TOA) reflectance, at-sensor brightness temperature, spatial uniformity, temporal stability, spectral stability, and typical spectrum observed over the sites.
Wang, Jim Jing-Yan
2012-05-01
Knowing the type of an uncharacterized membrane protein often provides a useful clue in both basic research and drug discovery. With the explosion of protein sequences generated in the post genomic era, determination of membrane protein types by experimental methods is expensive and time consuming. It therefore becomes important to develop an automated method to find the possible types of membrane proteins. In view of this, various computational membrane protein prediction methods have been proposed. They extract protein feature vectors, such as PseAAC (pseudo amino acid composition) and PsePSSM (pseudo position-specific scoring matrix) for representation of protein sequence, and then learn a distance metric for the KNN (K nearest neighbor) or NN (nearest neighbor) classifier to predicate the final type. Most of the metrics are learned using linear dimensionality reduction algorithms like Principle Components Analysis (PCA) and Linear Discriminant Analysis (LDA). Such metrics are common to all the proteins in the dataset. In fact, they assume that the proteins lie on a uniform distribution, which can be captured by the linear dimensionality reduction algorithm. We doubt this assumption, and learn local metrics which are optimized for local subset of the whole proteins. The learning procedure is iterated with the protein clustering. Then a novel ensemble distance metric is given by combining the local metrics through Tikhonov regularization. The experimental results on a benchmark dataset demonstrate the feasibility and effectiveness of the proposed algorithm named ProClusEnsem. © 2012 Elsevier Ltd.
Almandoz, Gastón O; Fabro, Elena; Ferrario, Martha; Tillmann, Urban; Cembella, Allan; Krock, Bernd
2017-03-01
The marine diatom genus Pseudo-nitzschia, the major known producer of the neurotoxin domoic acid (DA) responsible for the amnesic shellfish poisoning (ASP) syndrome in humans and marine mammals, is globally distributed. The genus presents high species richness in the Argentine Sea and DA has been frequently detected in the last few years in plankton and shellfish samples, but the species identity of the producers remains unclear. In the present work, the distribution and abundance of Pseudo-nitzschia species and DA were determined from samples collected on two oceanographic cruises carried out through the Argentine Sea (∼39-47°S) during summer and spring 2013. Phytoplankton composition was analysed by light and electron microscopy while DA was determined by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). The genus Pseudo-nitzschia was recorded in 71 and 86% of samples collected in summer and spring, respectively, whereas DA was detected in only 42 and 21% of samples, respectively. Microscopic analyses revealed at least five potentially toxic species (P. australis, P. brasiliana, P. fraudulenta, P. pungens, P. turgidula), plus putatively non-toxigenic P. dolorosa, P. lineola, P. turgiduloides and unidentified specimens of the P. pseudodelicatissima complex. The species P. australis showed the highest correlation with DA occurrence (r=0.55; p<0.05), suggesting its importance as a major DA producer in the Argentine Sea. In the northern area and during summer, DA was associated with the presence of P. brasiliana, a species recorded for the first time in the Argentine Sea. By contrast, high concentrations of P. fraudulenta, P. pungens and P. turgidula did not correspond with DA occurrence. This study represents the first successful attempt to link toxigenicity with Pseudo-nitzschia diversity and cell abundance in field plankton populations in the south-western Atlantic. Copyright © 2017 Elsevier B.V. All rights reserved.
Pseudo-random Spray Release to Measure World-wide Transfer Functions of Cloud Albedo Control.
Salter, Stephen
2010-05-01
Institute for Energy Systems, School of Engineering, University of Edinburgh. S.Salter@ed.ac.uk Previous climate models of Latham's proposal to reverse global warming by using sub-micron sea spray to increase cloud albedo have used a variety of spray patterns. Kettles forced CCN concentration to be 375/cm3 everywhere. Rasch et al used the 20% and 70% most susceptible regions. Bala and Caldeira used an even spread. Jones et al. concentrated spray in the 3.3% oceans with the highest susceptibility All used the same rate through the year. We want to choose a scheme for a climate-modelling experiment designed to identify simultaneously the effects of cloud albedo control at various seasons of the year from spray at all regions of the world on climates of all other regions the world. In particular we want to know seasons and spray places which might have an undesirable effect on precipitation. The spray systems in various regions of a numerical climate model will be modulated on an off with different but known pseudo-random sequences and a selection of seasons. The mean value of the resulting weather records of the parameters of interest, mainly temperature and water run-off, at each region will be subtracted from each value of the record so as to give just the alternating component with an average value of zero. This will be correlated with each of the chosen pseudo-random sequences to give the magnitude and polarity of the effect of a treatment at each input area and selected seasons of the year with the resulting effects on all regions. By doing a time-shifted correlation we can account for phase-shift and time delay. The signal-to-noise ratio should improve with the square root of the analysis time and so we may be able to measure the transfer function with quite a small stimulus. The results of a Mathcad simulation of the process with statistical distributions approximating to natural variations temperature and precipitation show that a single run of a climate
Pseudo-Patella Baja after total knee arthroplasty
Kazemi, Seyyed Morteza; Besheli, Laleh Daftari; Eajazi, Alireza; Sajadi, Mohammad Reza Miniator; Okhovatpoor, Mohammad Ali; Zanganeh, Ramin Farhang; Minaei, Reza
2011-01-01
Summary Background One of the complications of total knee arthroplasty (TKA) which has not yet been directly addressed is pseudo-patella baja (PPB). True patella baja (PB) is present when the length of the patellar tendon becomes shorter. PPB is present when the patella tendon is not shortened, but the level of the joint line is elevated. This study was conducted to assess PPB in TKA. Material/Methods Sixty patients who had had a primary TKA at our center between 1995 and 2005 were included. The average follow-up was 27.5 months. The Knee Society Scoring (KSS), lateral knee x-rays and the Blackburne-Peel index were used for assessments. Results Out of the 60 patients, 43 (72%) demonstrated no joint line elevation or patellar tendon shortening (group A). Fifteen patients (25%) had joint line elevation (group B), and both PB and PPB were present in 2 (3%) patients (group C). KSS was lower in groups B and C compared with group A, but this difference was not statistically significant. The average range of motion (ROM) in group A was significantly higher compared with either group B or C, and patients in groups B and C showed significantly more severe pain compared with group A (P<0.001). Conclusions PPB is not an uncommon finding after TKA and is associated with a statistically significant decrease in ROM and an increase in pain. Furthermore, KSS in the PPB group was less than in patients without PPB, although the difference was not statistically meaningful. PMID:21525812
Pseudo-Polar Fourier Transform-Based Compressed Sensing MRI.
Yang, Yang; Liu, Feng; Li, Mingyan; Jin, Jin; Weber, Ewald; Liu, Qinghuo; Crozier, Stuart
2017-04-01
The use of radial k-space trajectories has drawn strong interest from researchers for their potential in developing fast imaging methods in magnetic resonance imaging (MRI). Compared with conventional Cartesian trajectories, radial sampling collects more data from the central k-space region and the radially sampled data are more incoherent. These properties are very suitable for compressed sensing (CS)-based fast imaging. When reconstructing under-sampled radial data with CS, regridding and inverse-regridding are needed to transfer data between the image and frequency domains. In each CS iteration, two-dimensional interpolations are implemented twice in the regridding and inverse-regridding, introducing errors and undermining reconstruction quality. To overcome these problems, a radial-like pseudo-polar (PP) trajectory is proposed for the CS MRI applications. The PP trajectory preserves all the essential features of radial trajectory and allows an image reconstruction with PP fast Fourier transform (PPFFT) instead of interpolations. This paper attempts to investigate the performance of PP trajectory-based CS-MRI. In CS-based image reconstruction, the transformation of PP-sampled k-space data into the image domain is realized through PPFFT, which is based on the standard one-dimensional FFT and the fractional Fourier transform. To evaluate the effectiveness of the proposed methods, both numerical and experimental data are used to compare the new methods with conventional approaches. The proposed method provided high-quality reconstruction of the MR images with over 2-dB gain in peak signal-to-noise ratio while keeping structural similarity over 0.88 in different situations. Compared with the conventional radial sampling-based CS MRI methods, the proposed method achieves a more accurate reconstruction with respect to image detail/edge preservation and artifact suppression. The successful implementation of the PP subsampling-based CS scheme provides a practical and
Pseudo-nonlinear dynamic analysis of buckled pipes
Gültekin Sınır, B.
2013-02-01
In this study, the post-divergence behavior of fluid-conveying pipes supported at both ends is investigated using the nonlinear equations of motion. The governing equation exhibits a cubic nonlinearity arising from mid-plane stretching. Exact solutions for post-buckling configurations of pipes with fixed-fixed, fixed-hinged, and hinged-hinged boundary conditions are investigated. The pipe is stable at its original static equilibrium position until the flow velocity becomes high enough to cause a supercritical pitchfork bifurcation, and the pipe loses stability by static divergence. In the supercritical fluid velocity regime, the equilibrium configuration becomes unstable and bifurcates into multiple equilibrium positions. To investigate the vibrations that occur in the vicinity of a buckled equilibrium position, the pseudo-nonlinear vibration problem around the first buckled configuration is solved precisely using a new solution procedure. By solving the resulting eigenvalue problem, the natural frequencies and the associated mode shapes of the pipe are calculated. The dynamic stability of the post-buckling configurations obtained in this manner is investigated. The first buckled shape is a stable equilibrium position for all boundary conditions. The buckled configurations beyond the first buckling mode are unstable equilibrium positions. The natural frequencies of the lowest vibration modes around each of the first two buckled configurations are presented. Effects of the system parameters on pipe behavior as well as the possibility of a subcritical pitchfork bifurcation are also investigated. The results show that many internal resonances might be activated among the vibration modes around the same or different buckled configurations.
Pseudo-Meigs' syndrome secondary to metachronous ovarian metastases from transverse colon cancer.
Kyo, Kennoki; Maema, Atsushi; Shirakawa, Motoaki; Nakamura, Toshio; Koda, Kenji; Yokoyama, Hidetaro
2016-05-14
Pseudo-Meigs' syndrome associated with colorectal cancer is extremely rare. We report here a case of pseudo-Meigs' syndrome secondary to metachronous ovarian metastases from colon cancer. A 65-year-old female with a history of surgery for transverse colon cancer and peritoneal dissemination suffered from metachronous ovarian metastases during treatment with systemic chemotherapy. At first, neither ascites nor pleural effusion was observed, but she later complained of progressive abdominal distention and dyspnea caused by rapidly increasing ascites and pleural effusion and rapidly enlarging ovarian metastases. Abdominocenteses were repeated, and cytological examinations of the fluids were all negative for malignant cells. We suspected pseudo-Meigs' syndrome, and bilateral oophorectomies were performed after thorough informed consent. The patient's postoperative condition improved rapidly after surgery. We conclude that pseudo-Meigs' syndrome should be included in the differential diagnosis of massive or rapidly increasing ascites and pleural effusion associated with large or rapidly enlarging ovarian tumors.
A model for pseudo-Dirac neutrinos: leptogenesis and ultra-high energy neutrinos
Energy Technology Data Exchange (ETDEWEB)
Ahn, Y.H. [Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS),Daejeon, 34051 (Korea, Republic of); Kang, Sin Kyu [Insitute for Convergence Fundamental Study, School of Liberal Arts, Seoul-Tech.,Seoul, 01811 (Korea, Republic of); Kim, C.S. [Dept. of Physics and IPAP, Yonsei University,Seoul, 120-749 (Korea, Republic of)
2016-10-18
We propose a model where sterile neutrinos are introduced to make light neutrinos to be pseudo-Dirac particles. It is shown how tiny mass splitting necessary for realizing pseudo-Dirac neutrinos can be achieved. Within the model, we show how leptogenesis can be successfully generated. Motivated by the recent observation of very high energy neutrino events at IceCube, we study a possibility to observe the effects of the pseudo-Dirac property of neutrinos by performing astronomical-scale baseline experiments to uncover the oscillation effects of very tiny mass splitting. We also discuss future prospect to observe the effects of the pseudo-Dirac property of neutrinos at high energy neutrino experiments.
Acute large bowel pseudo-obstruction due to atrophic visceral myopathy: A case report
Directory of Open Access Journals (Sweden)
Sean M. Wrenn
2017-01-01
Conclusions: Atrophic visceral neuropathy is a rare cause of intestinal pseudo-obstruction. While often presenting with chronic obstruction in younger populations, we present a rare late-onset acute presentation that may have been secondary to underlying hypothyroidism.
West Coast DA Event data - West Coast Toxic Pseudo-nitzschia bloom
National Oceanic and Atmospheric Administration, Department of Commerce — Beginning in the spring of 2015 the US West Coast began to experience the most wide-spread toxic Pseudo-nitzschia bloom to date, after approximately eight years...
Phenomenology and Cosmology of an Electroweak Pseudo-Dilaton and Electroweak Baryons
Campbell, Bruce A; Olive, Keith A
2012-01-01
In many strongly-interacting models of electroweak symmetry breaking the lowest-lying observable particle is a pseudo-Goldstone boson of approximate scale symmetry, the pseudo-dilaton. Its interactions with Standard Model particles can be described using a low-energy effective nonlinear chiral Lagrangian supplemented by terms that restore approximate scale symmetry, yielding couplings of the pseudo-dilaton that differ from those of a Standard Model Higgs boson by fixed factors. We review the experimental constraints on such a pseudo-dilaton in light of new data from the LHC and elsewhere. The effective nonlinear chiral Lagrangian has Skyrmion solutions that may be identified with the `electroweak baryons' of the underlying strongly-interacting theory, whose nature may be revealed by the properties of the Skyrmions. We discuss the finite-temperature electroweak phase transition in the low-energy effective theory, finding that the possibility of a first-order electroweak phase transition is resurrected. We disc...
Directory of Open Access Journals (Sweden)
Bruno de Andrade
2009-01-01
Full Text Available We study the existence and uniqueness of almost automorphic (resp., pseudo-almost automorphic solutions to a first-order differential equation with linear part dominated by a Hille-Yosida type operator with nondense domain.
Some Properties of Mannheim Curves in Galilean and Pseudo - Galilean space
Öğrenmiş, Alper Osman; Öztekin, Handan; ERGÜT, Mahmut
2011-01-01
The aim of this work is to study the Mannheim curves in 3-dimensional Galilean and Pseudo - Galilean space. We obtain the characterizations between the curvatures and torsions of the Mannheim partner curves.
Backlund transformations of curves in the Galilean and pseudo-Galilean spaces
Cengiz, Süleyman; Gürbüz, Nevin
2011-01-01
Backlund transformations of admissible curves in the Galilean 3-space and pseudo-Galilean 3-space and also spatial Backlund transformations of space curves in Galilean 4-space preserve the torsions under certain assumptions.
Parallel Pseudo Arc-Length Moving Mesh Schemes for Multidimensional Detonation
National Research Council Canada - National Science Library
Jianguo Ning; Xinpeng Yuan; Tianbao Ma; Jian Li
2017-01-01
We have discussed the multidimensional parallel computation for pseudo arc-length moving mesh schemes, and the schemes can be used to capture the strong discontinuity for multidimensional detonations...
Fraknoi, A.
2008-11-01
During IYA educators and scientists will interact with the public in many ways. There will likely be public questions at IYA events about pseudo-scientific topics. While the particular pseudo-sciences that are in vogue change with time, these days popular astronomical pseudo-science includes creationism and intelligent design (and their denial of the age of the universe), astrology, UFO's as extra-terrestrial spaceships, selling star names, the ``face'' on Mars, the claim that the moon landings were a hoax, etc. We discuss some of the recent surveys of belief in pseudo-science and some ways to respond to questions about these topics. A separate resource guide to help answer questions about astronomical pseudoscience is also included in this volume.
The technique of «Subliminal verbal suggestion for the treatment of [pseudo]obsessions»
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N. V. Danilevska
2016-03-01
Full Text Available [Pseudo]obsessions therapy in patients with endogenous diseases of schizophrenic round accompanied with difficulties, caused by both psycho etio pathogenetic features of the disease. Disadvantages of the existing methods of therapy are associated with therapeutic conflict between two nosologies. Aim: to develop and test etiopsychopathogenetic technique "Subliminal verbal suggestion for the treatment of [pseudo]obsessions" as a subsidiary method of treatment of schizophrenia patients with [pseudo] obsessions in the structure of the disease. Methods and results. 137 patients who underwent hospital treatment 65 schizophrenia patients (F20 with the [pseudo]obsessive symptoms in the structure of the disease were examined on the basis of Public Health Institution «Regional clinical mental hospital» of the Zaporizhzhian regional council. 30 patients received standard pharmacotherapy (antipsychotic drugs according to clinical protocols that was combined with proposed technique "Subliminal verbal suggestion for the treatment of [pseudo]obsessions". The comparison group consisted of 35 patients treated with the use of standard pharmacotherapy: antipsychotic drugs. The next methods were used: medical history assessment, follow-up, clinical-psychopathological, psychodiagnostic. "Subliminal verbal suggestion for the treatment of [pseudo]obsessions" technique was developed. This technique is a combination of suggestion in the waking state and neurolinguistic programming, implemented with specially compiled auditory complex listening. The main therapeutic component s realized through the subthreshold perception of the verbal formulas that are unavailable to awareness. The technique consists of two components – primary and secondary, and three stages. The methodology was tested, its therapeutic efficacy was confirmed. Conclusion. "Subliminal verbal suggestion for the treatment of [pseudo]obsessions" technique was developed as a subsidiary method of the
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Ayman Al-Jazaeri
2016-03-01
Full Text Available Acute colonic pseudo-obstruction is frequently observed in adults but is rarely seen in children. The illness has never been reported in infants, who might differ in their reaction to the acute bowel distension and their response to the available management options. This report describes the presentation of acute colonic pseudo-obstruction in an infant after retroperitoneal pyeloplasty and its successful treatment with rectal irrigation.
Large conjugacy classes, projective Fraisse limits, and the pseudo-arc
Kwiatkowska, Aleksandra
2012-01-01
We show that the automorphism group, Aut(L), of a projective Fraisse limit L, whose natural quotient is the pseudo-arc, has a comeager conjugacy class. This generalizes an unpublished result of Oppenheim that Aut(L) (and consequently, the group of all homeomorphisms of the pseudo-arc) has a dense conjugacy class. We also present a simple proof of the result of Oppenheim.
Parallel Pseudo Arc-Length Moving Mesh Schemes for Multidimensional Detonation
Jianguo Ning; Xinpeng Yuan; Tianbao Ma; Jian Li
2017-01-01
We have discussed the multidimensional parallel computation for pseudo arc-length moving mesh schemes, and the schemes can be used to capture the strong discontinuity for multidimensional detonations. Different from the traditional Euler numerical schemes, the problems of parallel schemes for pseudo arc-length moving mesh schemes include diagonal processor communications and mesh point communications, which are illustrated by the schematic diagram and key pseudocodes. Finally, the numerical e...
Chronic intestinal pseudo-obstruction. Did you search for lysosomal storage diseases?
Politei, J.; Durand, C; Schenone, A.B.; Torres, A.; Mukdsi, J.; Thurberg, B.L.
2017-01-01
Chronic intestinal pseudo-obstruction results in clinical manifestations that resemble intestinal obstruction but in the absence of any physical obstructive process. Fabry disease is an X-linked lysosomal storage disease characterized by the dysfunction of multiple systems, including significant gastrointestinal involvement. We report the occurrence of chronic intestinal pseudo-obstruction in two unrelated patients with Fabry disease and the possible explanation of a direct relation of these ...
Cytological Studies on Narcissus －Ⅱ．Karyotype of Narcissus pseudo-narcissus-
HIRAHARA,Sachiye
1984-01-01
Karyotype analysis was made on Narcissus pseudo-narcissus. It was found that the chromosome number is 2n=14 and composed of 12 large and 2 small chromosomes. The 12 large chromosomes could be grouped into five homogeneous pairs and one heterogeneous pair，and the 2 small chromosomes were observed to be heterogeneous. Therefore，four heterogeneous chromosomes were found in N. pseudo-narcissus.
The BDS Triple Frequency Pseudo-range Correlated Stochastic Model of Single Station Modeling Method
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HUANG Lingyong
2017-05-01
Full Text Available In order to provide a reliable pseudo-range stochastic model, a method is studied to estimate the BDS triple-frequency pseudo-range related stochastic model based on three BDS triple-frequency pseudo-range minus carrier (GIF combinations using the data of a single station. In this algorithm, the low order polynomial fitting method is used to fit the GIF combination in order to eliminate the error and other constants except non pseudo noise at first. And then, multiple linear regression analysis method is used to model the stochastic function of three linearly independent GIF combinations. Finally the related stochastic model of the original BDS triple-frequency pseudo-range observations is obtained by linear transformation. The BDS triple-frequency data verification results show that this algorithm can get a single station related stochastic model of BDS triple-frequency pseudo-range observation, and it is advantageous to provide accurate stochastic model for navigation and positioning and integrity monitoring.
Research of smoothing pseudo-range algorithm by Doppler based on GPS/BD
Kang, Chuanli; Zhou, Yanliu
2015-12-01
GNSS (Global Navigation Satellite System) technology not only in the general field of surveying and mapping, geology, mining, water and electricity, and in particular in the field of public security, fire protection, tourism, search and rescue, adventure have been more widely used. These special areas require real-time and high positioning accuracy. Currently, GNSS precision positioning technology has become a hot research direction. This paper introduced an algorithm of smoothing pseudo range by Doppler based GPS/BD to improve GNSS positioning precision. This algorithm decoded the pseudo range data and ephemeris data, and then designed algorithm of smoothing pseudo range by Doppler according principle of Doppler smoothing pseudo range. This algorithm was realized by C++ and proved its efficiency. At last, this algorithm has proved its correctness through calculating and analyzing practical Doppler and pseudo range data, and then a conclusion has been obtained: the Doppler value precision is sub-meter, far better than the pseudo-range accuracy, so that if the two data are combined to calculate position that can help to improve the positioning accuracy.
Superselective pseudo-continuous arterial spin labeling angiography
Energy Technology Data Exchange (ETDEWEB)
Jensen-Kondering, Ulf [Department of Radiology and Neuroradiology, University Medical Center Schleswig-Holstein, Kiel (Germany); Lindner, Thomas, E-mail: thomas.lindner@uksh.de [Department of Radiology and Neuroradiology, University Medical Center Schleswig-Holstein, Kiel (Germany); Osch, Matthias J.P. van [C. J. Gorter Center for High Field MRI, Department of Radiology, Leiden University Medical Center, Leiden (Netherlands); Rohr, Axel; Jansen, Olav [Department of Radiology and Neuroradiology, University Medical Center Schleswig-Holstein, Kiel (Germany); Helle, Michael [Department of Radiology and Neuroradiology, University Medical Center Schleswig-Holstein, Kiel (Germany); Now with Philips GmbH Innovative Technologies, Research Laboratories, Hamburg (Germany)
2015-09-15
Highlights: • Superselective arterial spin labeling was capable of acquiring angiograms of individually selected arteries. • Image quality was similar compared with a routinely used time-of-flight angiography. • Superselective arterial spin labeling was utilized in patients with arterio-venous malformations and made it possible to visualize individual feeding vessels in a complete non-invasive way - Abstract: Purpose: To evaluate the utility of a novel non-contrast enhanced, vessel-selective magnetic resonance angiography (MRA) approach based on superselective pseudo-continuous arterial spin labeling (ASL) for the morphologic assessment of intracranial arteries when compared to a clinically used time-of-flight (TOF) MRA. Materials and methods: Three sets of selective ASL angiographies (right and left internal carotid artery, basilar artery) as well as one TOF data set were obtained from each of the five volunteers included in this study on a clinical 1.5T system. The depiction of arterial segments as well as their delineation was evaluated and independently analyzed by two radiologists. Additionally, the ASL angiography approach was performed in two patients suffering from arterio-venous malformations (AVM) in order to illustrate potential applications in a clinical setting. Results: In both angiography techniques, intracranial arteries and their segments (distal branches up to A5 segments of the anterior cerebral arteries, M8 segments of the middle cerebral arteries, and P5 segments of the posterior cerebral arteries) were continuously depicted with excellent inter-reader agreement (κ > 0.81). In AVM patients, reconstructed images of the TOF angiography presented similar information about the size and shape of the AVM as did superselective ASL angiography. In addition, the acquired ASL angiograms of selected vessels allowed assessing the blood supply of individually labeled arteries to the AVM which could also be confirmed by digital subtraction angiography
Unsustaineble pseudo-urban consequences of legal and urban terminology
Directory of Open Access Journals (Sweden)
Ćerimović Velimir Lj.
2011-01-01
Full Text Available City planning is a complex task and through this work we face the space and natural resources that expose the exploitation (that are to be exploited and prone to unsustainable change. Often without environmental responsibility and the imperative of creating certain measures we make superstructure no matter how much the environment may be disrupted, and whether such relationships create a better society, better network of urban settlements and a better man. At that may also affect our knowledge which is often due to a variety of doctrines and legislative regulations that are applied in the planning and management space. From this it can be seen that modern architecture did not contribute to the creation of better cities. Also, urban planning is mainly restricted to the regulation and it neglected the creative action, regional-planning is lost in theoretical research, while the consideration of the whole problem is abandoned. In addition to this, in today’s transitional terms and the domineering (dominant urban crisis unsustainable combination and identification of the “2D” and the “3D” terminology is recognizable, which is only indicators that in the field of urban planning some transitional trends are prevailing. This unsustainable state of affairs in the transitional planning of urban areas can be applied in the most suitable way to pseudo-urbanization, sub-urbanization, unbalanced eco-reciprocity, non-standard construction of the urban tissue, discontinuity inherited and newly constructed urban substance. In this regard, consequently expressed negative environmental legacy of reproduction and the increased effect of the negative consequences of greenhouse gases from the threatening climate change, only shows that urban planners are not sinless and, they more or less (unconsciously complicit and participate in the contamination of urban and environment. In the end, it definitely guides us to the need to leave or transformation of the
Xia, Weixing; Hirata, Kei; Yanagisawa, Keiichi; Ishida, Yoichi; Kasai, Hiroto; Yanagiuchi, Katsuaki; Shindo, Daisuke; Tonomura, Akira
2010-01-01
The magnetic interaction between the pole tip of a single-pole head and a pseudo soft underlayer in perpendicular magnetic recording was observed by electron holography. The magnetic flux density inside the soft underlayer was quantitatively evaluated. The distribution of magnetic flux density was calculated using the finite element method, and the influences of the modulation of the reference wave and stray fields were investigated by comparison with experimental results. The flux density observed was found to be underestimated due to the modulation of the phase shift in reference wave. The magnetic flux measured experimentally was larger than that inside the specimen because of the relatively large stray fields above and below the specimen in the direction of the electron beam.
Networked collaborative pseudo-dynamic testing of a multi-span bridge based on NetSLab
Cai, Xinjiang; Tian, Shizhu; Wang, Dapeng; Xiao, Yan
2009-09-01
Modern dynamic tests such as networked collaborative pseudo-dynamic testing (PDT) provide new tools to study the dynamic performance of large and complex structures. In this paper, several networked collaborative PDT systems established in China and abroad are introduced, including a detailed description of the first networked collaborative platform that involved the construction of a standardized demonstration procedure for networked collaborative PDT. The example is a multi-span bridge with RC piers retrofitted by FRP, and a networked structural laboratory (NetSLab) platform is used to link distributed laboratories located at several universities together. Substructure technology is also used in the testing. The characteristics, resource sharing and collaborative work of NetSLab are described, and the results illustrate that use of the NetSLab is feasible for studying the dynamic performance of multi-span bridge structures.
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Melina M. Gallo
2011-08-01
Full Text Available El pseudo-aneurisma de arteria coronaria es extremadamente raro. Su historia natural es poco conocida y su tratamiento discutido. Se presenta el caso de un paciente con pseudo-aneurisma de tronco de la coronaria izquierda e infarto antero-apical del ventrículo izquierdo cinco años después de un paro cardíaco secundario a un traumatismo no penetrante de tórax. Se consideró entonces que la lesión no era pasible de corrección percutánea o quirúrgica por lo que se optó por tratamiento médico conservador. Una angiografía coronaria por tomografía computarizada multicorte realizada 10 años después del evento inicial mostró ausencia de progresión de la lesión.Coronary pseudo-aneurysm is an extremely rare entity. Its natural history is scarcely known and its treatment is controversial. We report a case of pseudo-aneurysm of the left main coronary artery associated with an antero-apical infarct of the left ventricle diagnosed five years after a cardiac arrest following a non-penetrating thoracic trauma. The patient was treated conservatively because percutaneous or surgical correction were not considered suitable for this lesion. A multidetector computed tomography coronary angiogram performed 10 years after the initial event showed no evidence of progression.
DEFF Research Database (Denmark)
Arabi, H.; Koutsouvelis, N.; Rouzaud, M.
2016-01-01
task, a pseudo-computed tomography (CT) image must be predicted from MRI alone. In this work, we propose a two-step (segmentation and fusion) atlas-based algorithm focusing on bone tissue identification to create a pseudo-CT image from conventional MRI sequences and evaluate its performance against...... the conventional MRI segmentation technique and a recently proposed multi-atlas approach. The clinical studies consisted of pelvic CT, PET and MRI scans of 12 patients with loco-regionally advanced rectal disease. In the first step, bone segmentation of the target image is optimized through local weighted atlas...... volumes and organs at risk. Two-dimensional (2D) gamma analysis of the isocenter dose distributions at 1%/1 mm criterion revealed pass rates of 91.40 7.56%, 96.00 4.11% and 97.67 3.6% for MRI segmentation, atlas-guided and the proposed methods, respectively. The proposed method generates accurate pseudo...
Darias, Maria J; Andree, Karl B; Boglino, Anaïs; Rotllant, Josep; Cerdá-Reverter, José Miguel; Estévez, Alicia; Gisbert, Enric
2013-01-01
The appearance of the pseudo-albino phenotype was investigated in developing Senegalese sole (Solea senegalensis, Kaup 1858) larvae at morphological and molecular levels. In order to induce the development of pseudo-albinos, Senegalese sole larvae were fed Artemia enriched with high levels of arachidonic acid (ARA). The development of their skin pigmentation was compared to that of a control group fed Artemia enriched with a reference commercial product. The relative amount of skin melanophores, xanthophores and iridophores revealed that larval pigmentation developed similarly in both groups. However, results from different relative proportions, allocation patterns, shapes and sizes of skin chromatophores revealed changes in the pigmentation pattern between ARA and control groups from 33 days post hatching onwards. The new populations of chromatophores that should appear at post-metamorphosis were not formed in the ARA group. Further, spatial patterns of distribution between the already present larval xanthophores and melanophores were suggestive of short-range interaction that seemed to be implicated in the degradation of these chromatophores, leading to the appearance of the pseudo-albino phenotype. The expression profile of several key pigmentation-related genes revealed that melanophore development was promoted in pseudo-albinos without a sufficient degree of terminal differentiation, thus preventing melanogenesis. Present results suggest the potential roles of asip1 and slc24a5 genes on the down-regulation of trp1 expression, leading to defects in melanin production. Moreover, gene expression data supports the involvement of pax3, mitf and asip1 genes in the developmental disruption of the new post-metamorphic populations of melanophores, xanthophores and iridophores.
Darias, Maria J.; Andree, Karl B.; Boglino, Anaïs; Rotllant, Josep; Cerdá-Reverter, José Miguel; Estévez, Alicia; Gisbert, Enric
2013-01-01
The appearance of the pseudo-albino phenotype was investigated in developing Senegalese sole (Solea senegalensis, Kaup 1858) larvae at morphological and molecular levels. In order to induce the development of pseudo-albinos, Senegalese sole larvae were fed Artemia enriched with high levels of arachidonic acid (ARA). The development of their skin pigmentation was compared to that of a control group fed Artemia enriched with a reference commercial product. The relative amount of skin melanophores, xanthophores and iridophores revealed that larval pigmentation developed similarly in both groups. However, results from different relative proportions, allocation patterns, shapes and sizes of skin chromatophores revealed changes in the pigmentation pattern between ARA and control groups from 33 days post hatching onwards. The new populations of chromatophores that should appear at post-metamorphosis were not formed in the ARA group. Further, spatial patterns of distribution between the already present larval xanthophores and melanophores were suggestive of short-range interaction that seemed to be implicated in the degradation of these chromatophores, leading to the appearance of the pseudo-albino phenotype. The expression profile of several key pigmentation-related genes revealed that melanophore development was promoted in pseudo-albinos without a sufficient degree of terminal differentiation, thus preventing melanogenesis. Present results suggest the potential roles of asip1 and slc24a5 genes on the down-regulation of trp1 expression, leading to defects in melanin production. Moreover, gene expression data supports the involvement of pax3, mitf and asip1 genes in the developmental disruption of the new post-metamorphic populations of melanophores, xanthophores and iridophores. PMID:23874785
Directory of Open Access Journals (Sweden)
Maria J Darias
Full Text Available The appearance of the pseudo-albino phenotype was investigated in developing Senegalese sole (Solea senegalensis, Kaup 1858 larvae at morphological and molecular levels. In order to induce the development of pseudo-albinos, Senegalese sole larvae were fed Artemia enriched with high levels of arachidonic acid (ARA. The development of their skin pigmentation was compared to that of a control group fed Artemia enriched with a reference commercial product. The relative amount of skin melanophores, xanthophores and iridophores revealed that larval pigmentation developed similarly in both groups. However, results from different relative proportions, allocation patterns, shapes and sizes of skin chromatophores revealed changes in the pigmentation pattern between ARA and control groups from 33 days post hatching onwards. The new populations of chromatophores that should appear at post-metamorphosis were not formed in the ARA group. Further, spatial patterns of distribution between the already present larval xanthophores and melanophores were suggestive of short-range interaction that seemed to be implicated in the degradation of these chromatophores, leading to the appearance of the pseudo-albino phenotype. The expression profile of several key pigmentation-related genes revealed that melanophore development was promoted in pseudo-albinos without a sufficient degree of terminal differentiation, thus preventing melanogenesis. Present results suggest the potential roles of asip1 and slc24a5 genes on the down-regulation of trp1 expression, leading to defects in melanin production. Moreover, gene expression data supports the involvement of pax3, mitf and asip1 genes in the developmental disruption of the new post-metamorphic populations of melanophores, xanthophores and iridophores.
Basic Characteristics and Spatial Patterns of Pseudo-Settlements—Taking Dalian as An Example
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Jiaji Gao
2016-01-01
Full Text Available A person’s living behavior patterns are closely related to three types of settlements: real-life settlements, imagined settlements, and pseudo-settlements. The term “pseudo-settlement” (PS refers to the places that are selectively recorded and represented after the mass media chose and restructure the residence information. As the mass media rapidly develops and people’s way of obtaining information gradually change, PS has already become one of the main ways for people to recognize and understand real-life settlements, as well as describe their impressions of imagined settlements. PS also has a profound impact on tourism, employment, investment, migration, real estate development, etc. Thus, the study of PSs has important theoretical and practical significance. This paper proposes to put forward residential quarters where the mass media is displayed as the object of study and establishes the pseudo-settlement index system of Dalian in and elaborate analysis of the concept of PSs. From three aspects, including pseudo-buildings, pseudo-districts and pseudo-culture, this paper uses the ArcGIS 10.0 kernel density (spacial analyst to analyze and interpret the basic characteristics and spatial patterns of 14 elements of the PS in Dalian. Through systemic clustering analysis, it identifies eight major types of PSs in Dalian. Then it systematically elaborates current situations and characteristics of the spatial pattern of PSs in Dalian, namely: regionally concentrated, widely scattered and blank spaces without pseudo-settlements. Finally, this paper discusses the mechanism of formation of PSs in Dalian.
Pseudo-Scientific Information: Reasons of Spread and Premises of Vitality
Directory of Open Access Journals (Sweden)
Valdas Pruskus
2011-04-01
Full Text Available The phenomenon of pseudo-scientific information, the reasons of its spread and premises of its vitality are discussed in the paper. Pseudo-scientific information is understandable as an attempt to suit a demand, which exists in society, while providing a simple answer to a question, which an individual or society is concerned about, and that answer is not sustained by scientific research. It is showed that the rise and spread of pseudo-scientific information in society are conditioned by objective reasons. Firstly, the lack of information concerning a subject which is significant for society. Secondly, the lack of information for a particular individual (social group concerning a substantial subject. Thirdly, fast spread of scientific and technical inventions and penetration of technological innovations into various spheres of life the understanding of which demands an appropriate informal “processing”, i e it demands provision in an appropriate form, which is partly provided by pseudo-scientific knowledge.The existence of pseudo-scientific information is determined by the fact that it performs important social functions in society. The existence of pseudo-scientific information by official certified scientific information and the fact, that all social groups are affected to a larger or lesser extent, show its ambivalent power and vitality. On the one part, the roots of its vitality lie in the duality of this phenomenon, where opposite things coexist in a strange way – the truth (scientifically verified propositions and speculations which are based on intuition rather than on scientifically verified facts. On the other part, it is maintained by our permanent wish to get an additional and fresher information, though not totally reliable, while seeking to know universally and better the world around us and its phenomena. While meeting this requirement, a pseudo-scientific information stimulates researchers both to enhance their attempts to
"Fooling fido"--chemical and behavioral studies of pseudo-explosive canine training aids.
Kranz, William D; Strange, Nicholas A; Goodpaster, John V
2014-12-01
Genuine explosive materials are traditionally employed in the training and testing of explosive-detecting canines so that they will respond reliably to these substances. However, challenges arising from the acquisition, storage, handling, and transportation of explosives have given rise to the development of "pseudo-explosive" training aids. These products attempt to emulate the odor of real explosives while remaining inert. Therefore, a canine trained on a pseudo-explosive should respond to its real-life analog. Similarly, a canine trained on an actual explosive should respond to the pseudo-explosive as if it was real. This research tested those assumptions with a focus on three explosives: single-base smokeless powder, 2,4,6-trinitrotoluene (TNT), and a RDX-based plastic explosive (Composition C-4). Using gas chromatography-mass spectrometry with solid phase microextraction as a pre-concentration technique, we determined that the volatile compounds given off by pseudo-explosive products consisted of various solvents, known additives from explosive formulations, and common impurities present in authentic explosives. For example, simulated smokeless powders emitted terpenes, 2,4-dinitrotoluene, diphenylamine, and ethyl centralite. Simulated TNT products emitted 2,4- and 2,6-dinitrotoluene. Simulated C-4 products emitted cyclohexanone, 2-ethyl-1-hexanol, and dimethyldinitrobutane. We also conducted tests to determine whether canines trained on pseudo-explosives are capable of alerting to genuine explosives and vice versa. The results show that canines trained on pseudo-explosives performed poorly at detecting all but the pseudo-explosives they are trained on. Similarly, canines trained on actual explosives performed poorly at detecting all but the actual explosives on which they were trained.
[Pseudo-dementia conversion and post-traumatic stress disorder].
Montefiore, D; Mallet, L; Lévy, R; Allilaire, J-F; Pélissolo, A
2007-01-01
increased startle reactions. Hospitalisation became necessary because of a severe depressive disorder with suicidal ideation and suicidal attempt by hanging. After two failed treatments with SSRI antidepressants, the administration of clomipramine (200 mg/d) and a combined therapy with Eyes Movement Desensitization and Reprocessing (EMDR) led to a significant improvement of PTSD and depression symptoms. Even if PTSD and conversion may share common dissociative mechanisms, the links between both syndromes have not yet been sufficiently explored. Our clinical case raises specifically the question of the initial manifestations of pseudo-dementia (why this type of symptoms, and why at this particular moment of his life, without any targeting events). Moreover, the case of this patient is particularly interesting because of the very long amnesia period between the traumatic event and the onset of PTSD. The different phases of this case warrant more precise exploration of the links between PTSD and conversion, with clinical, epidemiological and cerebral imagery perspectives.
Pseudo-One-Dimensional Magnonic Crystals for High-Frequency Nanoscale Devices
Banerjee, Chandrima; Choudhury, Samiran; Sinha, Jaivardhan; Barman, Anjan
2017-07-01
The synthetic magnonic crystals (i.e., periodic composites consisting of different magnetic materials) form one fascinating class of emerging research field, which aims to command the process and flow of information by means of spin waves, such as in magnonic waveguides. One of the intriguing features of magnonic crystals is the presence and tunability of band gaps in the spin-wave spectrum, where the high attenuation of the frequency bands can be utilized for frequency-dependent control on the spin waves. However, to find a feasible way of band tuning in terms of a realistic integrated device is still a challenge. Here, we introduce an array of asymmetric saw-tooth-shaped width-modulated nanoscale ferromagnetic waveguides forming a pseudo-one-dimensional magnonic crystal. The frequency dispersion of collective modes measured by the Brillouin light-scattering technique is compared with the band diagram obtained by numerically solving the eigenvalue problem derived from the linearized Landau-Lifshitz magnetic torque equation. We find that the magnonic band-gap width, position, and the slope of dispersion curves are controllable by changing the angle between the spin-wave propagation channel and the magnetic field. The calculated profiles of the dynamic magnetization reveal that the corrugation at the lateral boundary of the waveguide effectively engineers the edge modes, which forms the basis of the interactive control in magnonic circuits. The results represent a prospective direction towards managing the internal field distribution as well as the dispersion properties, which find potential applications in dynamic spin-wave filters and magnonic waveguides in the gigahertz frequency range.
Seismic waves modeling with the Fourier pseudo-spectral method on massively parallel machines.
Klin, Peter
2015-04-01
The Fourier pseudo-spectral method (FPSM) is an approach for the 3D numerical modeling of the wave propagation, which is based on the discretization of the spatial domain in a structured grid and relies on global spatial differential operators for the solution of the wave equation. This last peculiarity is advantageous from the accuracy point of view but poses difficulties for an efficient implementation of the method to be run on parallel computers with distributed memory architecture. The 1D spatial domain decomposition approach has been so far commonly adopted in the parallel implementations of the FPSM, but it implies an intensive data exchange among all the processors involved in the computation, which can degrade the performance because of communication latencies. Moreover, the scalability of the 1D domain decomposition is limited, since the number of processors can not exceed the number of grid points along the directions in which the domain is partitioned. This limitation inhibits an efficient exploitation of the computational environments with a very large number of processors. In order to overcome the limitations of the 1D domain decomposition we implemented a parallel version of the FPSM based on a 2D domain decomposition, which allows to achieve a higher degree of parallelism and scalability on massively parallel machines with several thousands of processing elements. The parallel programming is essentially achieved using the MPI protocol but OpenMP parts are also included in order to exploit the single processor multi - threading capabilities, when available. The developed tool is aimed at the numerical simulation of the seismic waves propagation and in particular is intended for earthquake ground motion research. We show the scalability tests performed up to 16k processing elements on the IBM Blue Gene/Q computer at CINECA (Italy), as well as the application to the simulation of the earthquake ground motion in the alluvial plain of the Po river (Italy).
Absolute Calibration of Optical Satellite Sensors Using Libya 4 Pseudo Invariant Calibration Site
Mishra, Nischal; Helder, Dennis; Angal, Amit; Choi, Jason; Xiong, Xiaoxiong
2014-01-01
The objective of this paper is to report the improvements in an empirical absolute calibration model developed at South Dakota State University using Libya 4 (+28.55 deg, +23.39 deg) pseudo invariant calibration site (PICS). The approach was based on use of the Terra MODIS as the radiometer to develop an absolute calibration model for the spectral channels covered by this instrument from visible to shortwave infrared. Earth Observing One (EO-1) Hyperion, with a spectral resolution of 10 nm, was used to extend the model to cover visible and near-infrared regions. A simple Bidirectional Reflectance Distribution function (BRDF) model was generated using Terra Moderate Resolution Imaging Spectroradiometer (MODIS) observations over Libya 4 and the resulting model was validated with nadir data acquired from satellite sensors such as Aqua MODIS and Landsat 7 (L7) Enhanced Thematic Mapper (ETM+). The improvements in the absolute calibration model to account for the BRDF due to off-nadir measurements and annual variations in the atmosphere are summarized. BRDF models due to off-nadir viewing angles have been derived using the measurements from EO-1 Hyperion. In addition to L7 ETM+, measurements from other sensors such as Aqua MODIS, UK-2 Disaster Monitoring Constellation (DMC), ENVISAT Medium Resolution Imaging Spectrometer (MERIS) and Operational Land Imager (OLI) onboard Landsat 8 (L8), which was launched in February 2013, were employed to validate the model. These satellite sensors differ in terms of the width of their spectral bandpasses, overpass time, off-nadir-viewing capabilities, spatial resolution and temporal revisit time, etc. The results demonstrate that the proposed empirical calibration model has accuracy of the order of 3% with an uncertainty of about 2% for the sensors used in the study.
Events per variable for risk differences and relative risks using pseudo-observations
DEFF Research Database (Denmark)
Hansen, Stefan Nygaard; Andersen, Per Kragh; Parner, Erik Thorlund
2014-01-01
A method based on pseudo-observations has been proposed for direct regression modeling of functionals of interest with right-censored data, including the survival function, the restricted mean and the cumulative incidence function in competing risks. The models, once the pseudo-observations have ...... differences and relative risks for right-censored data. We investigate how coverage probabilities and relative bias of the pseudo-observation estimator interact with sample size, number of variables and average number of events per variable.......A method based on pseudo-observations has been proposed for direct regression modeling of functionals of interest with right-censored data, including the survival function, the restricted mean and the cumulative incidence function in competing risks. The models, once the pseudo-observations have...... been computed, can be fitted using standard generalized estimating equation software. Regression models can however yield problematic results if the number of covariates is large in relation to the number of events observed. Guidelines of events per variable are often used in practice. These rules...
Comparison of static MRI and pseudo-dynamic MRI in temporomandibular joint disorder patients
Energy Technology Data Exchange (ETDEWEB)
Lee, Jin Ho; Yun, Kyoung In [Eulji Univ. School of Medicine, Seoul (Korea, Republic of); Park, In Woo; Choi, Hang Moon; Park, Moon Soo [Kangnung National Univ. College of Dentistry, Kangnung (Korea, Republic of)
2006-12-15
The purpose of this study was to elevate comparison of static MRI and pseudo-dynamic (cine) MRI in temporomandibular joint (TMJ) disorder patients. In this investigation, 33 patients with TMJ disorders were examined using both conventional static MRI and pseudo-dynamic MRI. Multiple spoiled gradient recalled acquisition in the steady state (SPGR) images were obtained when mouth opened and closed. Proton density weighted images were obtained at the closed and open mouth position in static MRI. Two oral and maxillofacial radiologists evaluated location of the articular disk, movement of condyle and bony change respectively and the posterior boundary of articular disk was obtained. No statistically significant difference was found in the observation of articular disk position, mandibular condylar movement and posterior boundary of articular disk using static MRI and pseudo-dynamic MRI (P>0.05). Statistically significant difference was noted in bony changes of condyle using static MRI and pseudo-dynamic MRI (P<0.05). This study showed that pseudo-dynamic MRI didn't make a difference in diagnosing internal derangement of TMJ in comparison with static MRI. But it was considered as an additional method to be supplemented in observing bony change.
Hyperpigmented Torpedo Maculopathy with Pseudo-Lacuna: A 5-Year Follow-Up.
Rohl, Austin; Vance, Sushma
2016-01-01
The aim of the study was to describe a case of globally hyperpigmented torpedo maculopathy that also contained a novel central lesion resembling a 'pseudo-lacuna'. We compare the morphology of the lesion after 5 years of follow-up. An asymptomatic 10-year-old Caucasian male was referred by his optometrist after having found a hyperpigmented lesion on routine dilated examination in 2010. Color fundus photography OS from October 2015 showed a 1.74 × 0.67 mm hyperpigmented oval-shaped lesion temporal to the macula. Since June 2010, the hyperpigmented torpedo lesion appeared to have assumed a more ovoid shape and increased in size in the vertical axis. Centrally, there was a small pearlescent-colored pseudo-lacuna lesion that seemed to also have significantly increased in size since June 2010. Enhanced depth imaging optical coherence tomography of this pseudo-lacuna showed retinal pigment epithelium clumping and migration. Fundus autofluorescence revealed reduced autofluorescence of the torpedo lesion and marked hyperautofluorescence of the pseudo-lacuna. Fluorescein angiography shows no neovascular disease or leakage. Torpedo maculopathy has been described previously as a hypopigmented, nonprogressive lesion of unknown etiology. The findings of global hyperpigmentation, pseudo-lacuna formation, and morphologic changes over time in this lesion challenge these classically held descriptions, and necessitate long-term follow-up with multimodal imaging.
Energy Technology Data Exchange (ETDEWEB)
Kim, Bohyun [University of Ulsan College of Medicine, Asan Medical Center, Department of Radiology and Research Institute of Radiology, Seoul (Korea, Republic of); Ajou University School of Medicine, Department of Radiology, Suwon (Korea, Republic of); Byun, Jae Ho; Kim, Hyoung Jung; Won, Hyung Jin; Kim, So Yeon; Shin, Yong Moon; Kim, Pyo Nyun [University of Ulsan College of Medicine, Asan Medical Center, Department of Radiology and Research Institute of Radiology, Seoul (Korea, Republic of)
2016-01-15
To compare the enhancement patterns and prevalence of pseudo-washout between rapidly and slowly enhancing hepatic haemangiomas on gadoxetate disodium-enhanced MRI in patients with chronic liver disease (CLD) and healthy liver (HL). On gadoxetate disodium-enhanced MRI, the extent of intralesional arterial enhancement >50 % and ≤50 % of lesions was defined as rapid and slow enhancement, respectively. The enhancement patterns and presence of pseudo-washout during the portal venous phase (PVP) and transitional phase (TP) of 74 hepatic haemangiomas were retrospectively evaluated in the CLD and HL groups. Sequential changes of signal-to-noise ratio (SNR) were measured in unenhanced phase, PVP and TP. Irrespective of hepatic health status, pseudo-washout in TP was significantly more common in the rapidly enhancing haemangiomas (p ≤ 0.026). In both groups, rapidly enhancing haemangiomas showed complete or progressive incomplete enhancement in PVP, which either lasted or transformed to pseudo-washout in TP, whereas slowly enhancing haemangiomas showed progressive incomplete enhancement in PVP and TP. SNR of hepatic parenchyma continued to rise until TP, whereas that of portal vein and haemangioma falls in TP. Regardless of CLD, pseudo-washout in TP was more common in rapidly than in slowly enhancing haemangiomas, with enhancement patterns differing in the two subgroups. (orig.)
Energy Technology Data Exchange (ETDEWEB)
YASHCHUK,V.V.; MCKINNEY, W.R.; TAKACS, P.Z.
2007-08-01
The task of designing high performance X-ray optical systems requires the development of sophisticated X-ray scattering calculations based on rigorous information about the optics. One of the most insightful approaches to these calculations is based on the power spectral density (PSD) distribution of the surface height. The major problem of measurement of a PSD distribution with an interferometric and/or atomic force microscope arises due to the unknown Modulation Transfer Function (MTF) of the instruments. The MTF characterizes the perturbation of the PSD distribution at higher spatial frequencies. Here, we describe a new method and dedicated test surfaces for calibration of the MTF of a microscope. The method is based on use of a specially designed Binary Pseudo-random (BPR) grating. Comparison of a theoretically calculated PSD spectrum of a BPR grating with a spectrum measured with the grating provides the desired calibration of the instrumental MTF. The theoretical background of the method, as well as results of experimental investigations are presented.
Detection of thin beds with the pseudo-acoustic impedance section
Energy Technology Data Exchange (ETDEWEB)
Szulyovszky, I.
1987-03-01
The conventional seismic response of a thin bed approximates the time derivative of the incident wavelet, whereas the pseudo-impedance response approximates the incident wavelet. Consequently the pseudo-impedance response of a geological sequence composed of thin beds is simpler and easier to interpret than the conventional response. By calibrating the sonic log data with check-shot data and performing zero-phase seismic processing, the fit of the sonic log and pseudo-velocity section is improved. Discrepancies in amplitude and phase, however, generally remain. A five-step processing and interpretation procedure, which benefits from multichannel interpretation along the model seismic section generated from the sonic logs, is described. The method has been tested with field data. In the test the detection of thin beds and the estimation of the natural gas content was more reliable with the proposed procedure than with the conventional method.
Synchronizing microelectrode and electronic goniometer data using a pseudo-random binary signal.
Moore, Tyler Robert; Jacobs, Rennie Underwood; Yang, Alexander Cheung; Richter, Erich Oscar
2013-04-01
Intra-operative investigation of the subthalamic nucleus (STN) requires concurrent measurement of microelectrode voltage, electrode depth and joint movement during deep brain stimulation (DBS) surgery. Commercial solutions to this problem exist but are more expensive. Multiple instruments from different manufacturers can collect the same data, but data from incompatible instruments are collected on disparate clocks, precluding quantitative analysis. A pseudo-random binary signal recorded simultaneously by each set of instruments allows for chronological reconciliation. A custom program collects microelectrode data while simultaneously sending a pseudo-random binary signal to instruments measuring joint movement. The record of this signal is later used to express microelectrode voltage and joint position in a single chronological frame of reference. ClockSynch was used in 15 DBS procedures. After each surgery, records of microelectrode and joint movement were successfully chronologically reconciled. In conclusion, a pseudo-random binary signal integrates disparate systems of instrumentation at a significantly decreased cost.
Non-periodic pseudo-random numbers used in Monte Carlo calculations
Barberis, Gaston E.
2007-09-01
The generation of pseudo-random numbers is one of the interesting problems in Monte Carlo simulations, mostly because the common computer generators produce periodic numbers. We used simple pseudo-random numbers generated with the simplest chaotic system, the logistic map, with excellent results. The numbers generated in this way are non-periodic, which we demonstrated for 1013 numbers, and they are obtained in a deterministic way, which allows to repeat systematically any calculation. The Monte Carlo calculations are the ideal field to apply these numbers, and we did it for simple and more elaborated cases. Chemistry and Information Technology use this kind of simulations, and the application of this numbers to quantum Monte Carlo and cryptography is immediate. I present here the techniques to calculate, analyze and use these pseudo-random numbers, show that they lack periodicity up to 1013 numbers and that they are not correlated.
Quasi-phases and pseudo-transitions in one-dimensional models with nearest neighbor interactions
de Souza, S. M.; Rojas, Onofre
2018-01-01
There are some particular one-dimensional models, such as the Ising-Heisenberg spin models with a variety of chain structures, which exhibit unexpected behaviors quite similar to the first and second order phase transition, which could be confused naively with an authentic phase transition. Through the analysis of the first derivative of free energy, such as entropy, magnetization, and internal energy, a "sudden" jump that closely resembles a first-order phase transition at finite temperature occurs. However, by analyzing the second derivative of free energy, such as specific heat and magnetic susceptibility at finite temperature, it behaves quite similarly to a second-order phase transition exhibiting an astonishingly sharp and fine peak. The correlation length also confirms the evidence of this pseudo-transition temperature, where a sharp peak occurs at the pseudo-critical temperature. We also present the necessary conditions for the emergence of these quasi-phases and pseudo-transitions.
The scheme of automatic pseudo Doppler software defined radio direction finder
Directory of Open Access Journals (Sweden)
Pavlyuk V.V.
2017-04-01
Full Text Available The research describes the implementation approaches of a pseudo Doppler radio direction finding method based on software defined radio technology. A block diagram of an automatic pseudo Doppler software defined radio direction finder is proposed. A hardware functional diagram of specialized software architecture is offered. New schematic solution for antenna commutator and beating software synchronization is realized. For smoothing the bearing measurement of an aperiodic cyclic field based filtering procedure is proposed. By mathematical and experimental modeling a key features of a pseudo Doppler software defined radio direction finder are proved in comparison with the classical implementation: short signals bearing ability, statistical smoothing algorithms implementation convenience, simultaneous multiple frequency channels direction finding possibility, processing information simplification, flexibility and reconfigurability of radio direction finding systems. A prototype that implements the proposed approaches, circuitry design, software and algorithmic solutions is developed.
Parallel Pseudo Arc-Length Moving Mesh Schemes for Multidimensional Detonation
Directory of Open Access Journals (Sweden)
Jianguo Ning
2017-01-01
Full Text Available We have discussed the multidimensional parallel computation for pseudo arc-length moving mesh schemes, and the schemes can be used to capture the strong discontinuity for multidimensional detonations. Different from the traditional Euler numerical schemes, the problems of parallel schemes for pseudo arc-length moving mesh schemes include diagonal processor communications and mesh point communications, which are illustrated by the schematic diagram and key pseudocodes. Finally, the numerical examples are given to show that the pseudo arc-length moving mesh schemes are second-order convergent and can successfully capture the strong numerical strong discontinuity of the detonation wave. In addition, our parallel methods are proved effectively and the computational time is obviously decreased.
Directory of Open Access Journals (Sweden)
Carlos Eduardo Junqueira de Azevedo Tibiriçá
2015-03-01
Full Text Available This study investigated the spatial and temporal distributions of toxigenic phytoplankton species between October 2010 and April 2012 in Guaratuba Bay, Paraná state, Brazil, where aquaculture has been intensified in recent years. The highest abundances of Pseudo-nitzschia calliantha and P. pungens (up to 7.3 x 104 cells L-1, diatoms which cause amnesic shellfish poisoning (ASP, were correlated with higher values of temperature (from December to April, salinity (>20 and silicate concentrations (ranging from 6.0 to 90.0 µm. The occurrence of these harmful diatoms in the bay also appeared to depend upon the development of seeding mechanisms in the adjacent coastal water and its subsequent advection by tidal currents to the interior of the estuary. During the study period, Pseudo-nitzschia cell abundance remained low to moderate probably as a result of growth limitation by phosphate shortage, especially in the outer area of the estuary. In addition, harmful species of Dinophysis, dinoflagellates responsible for diarrhetic shellfish poisoning (DSP events, were recorded in every sampling campaign. The highest abundances of D. acuminata, D. caudata and D. tripos were associated with the upper halocline layer in regions of the bay where water column stratification was more frequent. On some occasions, cell abundances of D. acuminata (up to 3.2 x 103 cells L-1 exceeded levels considered harmful in areas used to cultivate bivalve mollusks for human consumption. These novel results strongly indicate the necessity of implementing a monitoring program for harmful microalgae in Guaratuba Bay.
Directory of Open Access Journals (Sweden)
Pedro Montalvo
2004-12-01
Full Text Available Se presenta el caso infrecuente de un paciente con miopatía visceral esporádica y afectación de la totalidad del tracto gastrointestinal y de la vía urinaria. La miopatía visceral es una forma de pseudo-obstrucción intestinal crónica idiopática caracterizada por degeneración vacuolar, atrofia y fibrosis de la capa muscular propia de la pared intestinal, sin células inflamatorias. Se puede presentar en niños y adolescentes afectando la musculatura visceral digestiva y urinaria. La manifestación familiar se encuentra en aproximadamente el 30% de los casos y se transmite de forma autosómica recesiva en la mayoría de las familias. Es fundamental descartar causas secundarias de pseudo-obstrucción intestinal crónica y la realización de biopsia de todo el espesor de la pared gastrointestinal para poder arribar al diagnóstico. El tratamiento quirúrgico sólo es eficaz en los que tienen afectación de porciones aisladas del tubo digestivo.We report an unusual case of a patient with sporadic visceral myopathy and involvement of the entire gastrointestinal and urinary tract. Visceral myopathy is a form of chronic idiophatic intestinal pseudo-obstruction characterized by vacuolar degeneration, atrophy and fibrosis of the intestinal propia muscle layer without inflammatory cells. It can be found in childhood and adolescence affecting the gastrointestinal and urinary visceral muscle. The familial occurrence can be found in about 30% of cases and the mode of transmission is autosomal recessive in most families. It is crucial to exclude secondary forms of chronic intestinal pseudo-obstruction and to obtain full thickness intestinal biopsy for the diagnosis. Surgical treatment is only beneficial in cases with isolated segmental involvement of the gastrointestinal tract.
Influencia del Pseudo Dionisio en Nicolás de Cusa
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Andrés Hubert R
2007-01-01
Full Text Available Nicolás de Cusa (1401-1464 reconoce la influencia del Pseudo Dionisio en su propio pensamiento, especialmente en su teología negativa. Este trabajo busca mostrar esta influencia en el libro referencia del Cusano: el De Docta Ignorantia (la Docta Ignorancia. Esta obra consta de 3 partes. Solo en la primera parte, Nicolás sigue de cerca las ideas del Pseudo Dionisio y solo en ella lo cita. En las demás, aunque se nota la influencia, nuestro autor se siente más libre: las fundaciones están firmes, el constructor puede construir libremente. Para probar esta tesis, se toman dos ejemplos: el tema de las tinieblas y la coincidencia de los opuestos. Este ejercicio permite conocer cómo y por qué se recibió al Pseudo Dionisio en la historia de la teología. Permite también profundizar el sentido de la teología de Nicolás de CusaThe reflections of Nicolas of Cusa (1401-1464 recognise the influence of Pseudo Dyonisius, particularly in his negative theology. The present study shows this influence on Nicolas' most important book: the De Docta Ignorantia (the Learned Ignorance. The book is divided into three parts and it is in the first part that Nicolas directly pursues the ideas of Pseudo Dyonisius and it is only here that he quotes them. In the other parts of the book although the influence is noted, the foundations have been set and are solid and the author or builder can construct with freedom. To prove this thesis, 2 examples are presented: the theme of darkness and the coincidence of opposites. This exercise shows how and why Pseudo Dyonisius has been accepted into the history of the theology. It also deepens the meaning of the Nicolas of Cusa's theology
Variation in the abundance of Pseudo-nitzschia and domoic acid with surf zone type.
Shanks, Alan L; Morgan, Steven G; MacMahan, Jamie; Reniers, Ad J H M; Kudela, Raphael; Jarvis, Marley; Brown, Jenna; Fujimura, Atsushi; Ziccarelli, Lisa; Griesemer, Chris
2016-05-01
Most harmful algal blooms (HAB) originate away from the shore and, for them to endanger human health, they must be first transported to shore after which they must enter the surf zone where they can be feed upon by filter feeders. The last step in this sequence, entrance into the surf zone, depends on surf zone hydrodynamics. During two 30-day periods, we sampled Pseudo-nitzschia and particulate domoic acid (pDA) in and offshore of a more dissipative surf zone at Sand City, California (2010) and sampled Pseudo-nitzschia in and out of reflective surf zones at a beach and rocky shores at Carmel River State Beach, California (2011). At Sand City, we measured domoic acid in sand crabs, Emerita analoga. In the more dissipative surf zone, concentrations of Pseudo-nitzschia and pDA were an order of magnitude higher in samples from a rip current than in samples collected just seaward of the surf zone and were 1000 times more abundant than in samples from the shoals separating rip currents. Domoic acid was present in all the Emerita samples and varied directly with the concentration of pDA and Pseudo-nitzschia in the rip current. In the more reflective surf zones, Pseudo-nitzschia concentrations were 1-2 orders of magnitude lower than in samples from 125 and 20m from shore. Surf zone hydrodynamics affects the ingress of Pseudo-nitzschia into surf zones and the exposure of intertidal organisms to HABs on the inner shelf. Copyright © 2016 Elsevier B.V. All rights reserved.
Diversity of Pseudo-nitzschia H. Peragallo from the western North Pacific
DEFF Research Database (Denmark)
Stonik, Inna V.; Orlova, Tatiana Yu; Lundholm, Nina
2011-01-01
Asurvey focusing on species belonging to the diatom genus Pseudo-nitzschia was conducted in the western North Pacific (the northwestern Sea of Japan and the Sea of Okhotsk). Light and electron microscopic examination of 314 phytoplankton field samples collected from 1995 to 2006 revealed the pres......Asurvey focusing on species belonging to the diatom genus Pseudo-nitzschia was conducted in the western North Pacific (the northwestern Sea of Japan and the Sea of Okhotsk). Light and electron microscopic examination of 314 phytoplankton field samples collected from 1995 to 2006 revealed...
Excess Charge for Pseudo-relativistic Atoms in Hartree-Fock Theory
DEFF Research Database (Denmark)
Dall'Acqua, Anna; Solovej, Jan Philip
2010-01-01
We prove within the Hartree-Fock theory of pseudo-relativistic atoms that the maximal negative ionization charge and the ionization energy of an atom remain bounded independently of the nuclear charge $Z$ and the fine structure constant $\\alpha$ as long as $Z\\alpha$ is bounded.......We prove within the Hartree-Fock theory of pseudo-relativistic atoms that the maximal negative ionization charge and the ionization energy of an atom remain bounded independently of the nuclear charge $Z$ and the fine structure constant $\\alpha$ as long as $Z\\alpha$ is bounded....
Curvature Perturbation and Domain Wall Formation with Pseudo Scaling Scalar Dynamics
Ema, Yohei; Takimoto, Masahiro
2015-01-01
Cosmological dynamics of scalar field with a monomial potential $\\phi^{n}$ with a general background equation of state is revisited. It is known that if $n$ is smaller than a critical value, the scalar field exhibits a coherent oscillation and if $n$ is larger it obeys a scaling solution without oscillation. We study in detail the case where $n$ is equal to the critical value, and find a peculiar scalar dynamics which is neither oscillating nor scaling solution, and we call it a pseudo scaling solution. We also discuss cosmological implications of a pseudo scaling scalar dynamics, such as the curvature perturbation and the domain wall problem.
Pseudo-outbreak of Penicillium in an outpatient obstetrics and gynecology clinic.
Sood, Geetika; Huber, Kerri; Dam, Lisa; Riedel, Stefan; Grubb, Lisa; Zenilman, Jonathan; Perl, Trish M; Argani, Cynthia
2017-05-01
We report an unusual pseudo-outbreak of Penicillium that occurred in patients seen in an outpatient obstetrics and gynecology clinic. The pseudo-outbreak was detected in late 2012, when the microbiology department reported a series of vaginal cultures positive for Penicillium spp. Our investigation found Penicillium spp in both patient and environmental samples and was potentially associated with the practice of wetting gloves with tap water by a health care worker prior to patient examination. Copyright © 2017 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Elsevier Inc. All rights reserved.
Complexity and properties of a multidimensional Cat-Hadamard map for pseudo random number generation
Kim Hue, Ta Thi; Hoang, Thang Manh
2017-07-01
This paper presents a novel method to extend the Cat map from 2-dimension to higher dimension using the fast pseudo Hadamard Transform, and the resulted maps are called Cat-Hadamard maps. The complexity and properties of Cat-Hadamard maps are investigated under the point of view for cryptographic applications. In addition, we propose a method for constructing a pseudo random number generator using a novel design concept of the high dimensional Cat map. The simulation results show that the proposed generator fulfilled all the statistic tests of the NIST SP 800-90 A.
Convergence theorems of fixed points for Lipschitz pseudo-contractions in Hilbert spaces
Zhou, Haiyun
2008-07-01
Let C be a closed convex subset of a real Hilbert space H and assume that T is a [kappa]-strict pseudo-contraction on C. Consider Mann's iteration algorithm given by It is proved that if the control sequence {[alpha]n} is chosen so that [kappa]Rhoades [B.E. Rhoades, Fixed point iterations using infinite matrices, Trans. Amer. Math. Soc. 196 (1974) 162-176] and of Marino and Xu [G. Marino, H.-K. Xu, Weak and strong convergence theorems for strict pseudo-contractions in Hilbert spaces, J. Math. Anal. Appl. 329 (1) (2007) 336-346].
INTESTINAL PSEUDO-OBSTRUCTION AND TRANSIENT CARDIOVASCULAR ABNORMALITIES IN KAWASAKI DISEASE
Directory of Open Access Journals (Sweden)
Maria L Avila-Aguero
2005-08-01
Full Text Available SUMMARYWe describe a 2 year-old boy with severe vasculitis who presented with a typical Kawasaki disease complicated with an intestinal pseudo-obstruction, gallbladder hydrops, myocarditis and transient coronary abnormalities despite early administration of intravenous immunoglobulin treatment.RESUMENDescribimos el caso de un niño de 2 años con vasculitis grave que presentó un cuadro típico de enfermedad de Kawasaki complicada con una pseudo-obtrucción intestinal, hidrops vesicular, miocarditis y anormalidades coronarias transitorias, a pesar de la administración temprana de tratamiento con inmunoglulina intravenosa
Hypercontractive inequality for pseudo-Boolean functions of bounded Fourier width
DEFF Research Database (Denmark)
Gutin, Gregory; Yeo, Anders
2012-01-01
A function f: -1,1n→R is called pseudo-Boolean. It is well-known that each pseudo-Boolean function f can be written as f(x)=∑ I∈Ff̂(I) χI(x), where F⊆I:I⊆[n], [n]=1,2,...,n, χI(x)= ∏ i∈I xi and f̂(I) are non-zero reals. The degree of f is max|I|:I∈F and the width of f is the minimum integer ρ suc...
Mughal, M M; Irving, M H
1988-11-01
Three cases are described of end stage chronic intestinal pseudo-obstruction successfully treated by subtotal enterectomy and home parenteral nutrition (HPN). In all three patients prior use of drugs to stimulate gastrointestinal motility, antibiotics to suppress bacterial overgrowth and surgical bypass of dilated bowel had failed to alleviate the symptoms of chronic intestinal obstruction. Similarly parenteral nutrition combined with restriction of oral intake, although improving nutrition did not relieve symptoms. The treatment of end stage chronic pseudo-obstruction should relieve intestinal obstruction and correct nutritional deficiency. In our experience this is best achieved by subtotal enterectomy, restoration of continuity by end-to-end anastomosis and total parenteral nutrition.
Spinorial Characterizations of Surfaces into 3-dimensional Pseudo-Riemannian Space Forms
Energy Technology Data Exchange (ETDEWEB)
Lawn, Marie-Amelie, E-mail: marie-amelie.lawn@unine.ch [Universite de Neuchatel, Institut de Mathematiques (Switzerland); Roth, Julien, E-mail: julien.roth@univ-mlv.fr [Universite Paris-Est Marne-la-Vallee, Laboratoire d' Analyse et de Mathematiques Appliquees (UMR 8050) (France)
2011-09-15
We give a spinorial characterization of isometrically immersed surfaces of arbitrary signature into 3-dimensional pseudo-Riemannian space forms. This generalizes a recent work of the first author for spacelike immersed Lorentzian surfaces in Double-Struck-Capital-R {sup 2,1} to other Lorentzian space forms. We also characterize immersions of Riemannian surfaces in these spaces. From this we can deduce analogous results for timelike immersions of Lorentzian surfaces in space forms of corresponding signature, as well as for spacelike and timelike immersions of surfaces of signature (0, 2), hence achieving a complete spinorial description for this class of pseudo-Riemannian immersions.
The two-body problem of a pseudo-rigid body and a rigid sphere
DEFF Research Database (Denmark)
Kristiansen, Kristian Uldall; Vereshchagin, M.; Gózdziewski, K.
2012-01-01
n this paper we consider the two-body problem of a spherical pseudo-rigid body and a rigid sphere. Due to the rotational and "re-labelling" symmetries, the system is shown to possess conservation of angular momentum and circulation. We follow a reduction procedure similar to that undertaken...... in the study of the two-body problem of a rigid body and a sphere so that the computed reduced non-canonical Hamiltonian takes a similar form. We then consider relative equilibria and show that the notions of locally central and planar equilibria coincide. Finally, we show that Riemann's theorem on pseudo...
Toeplitz Operators, Pseudo-Homogeneous Symbols, and Moment Maps on the Complex Projective Space
Directory of Open Access Journals (Sweden)
Miguel Antonio Morales-Ramos
2017-01-01
Full Text Available Following previous works for the unit ball due to Nikolai Vasilevski, we define quasi-radial pseudo-homogeneous symbols on the projective space and obtain the corresponding commutativity results for Toeplitz operators. A geometric interpretation of these symbols in terms of moment maps is developed. This leads us to the introduction of a new family of symbols, extended pseudo-homogeneous, that provide larger commutative Banach algebras generated by Toeplitz operators. This family of symbols provides new commutative Banach algebras generated by Toeplitz operators on the unit ball.
Transferable Pseudo-Classical Electrons for Aufbau of Atomic Ions
Ekesan, Solen; Kale, Seyit; Herzfeld, Judith
2014-01-01
Generalizing the LEWIS reactive force field from electron pairs to single electrons, we present LEWIS• in which explicit valence electrons interact with each other and with nuclear cores via pairwise interactions. The valence electrons are independently mobile particles, following classical equations of motion according to potentials modified from Coulombic as required to capture quantum characteristics. As proof of principle, the aufbau of atomic ions is described for diverse main group elements from the first three rows of the periodic table, using a single potential for interactions between electrons of like spin and another for electrons of unlike spin. The electrons of each spin are found to distribute themselves in a fashion akin to the major lobes of the hybrid atomic orbitals, suggesting a pointillist description of the electron density. The broader validity of the LEWIS• force field is illustrated by predicting the vibrational frequencies of diatomic and triatomic hydrogen species. PMID:24752384
Energy Technology Data Exchange (ETDEWEB)
Suthar, B; Northrop, PWC; Braatz, RD; Subramanian, VR
2014-07-30
This paper illustrates the application of dynamic optimization in obtaining the optimal current profile for charging a lithium-ion battery by restricting the intercalation-induced stresses to a pre-determined limit estimated using a pseudo 2-dimensional (P2D). model. This paper focuses on the problem of maximizing the charge stored in a given time while restricting capacity fade due to intercalation-induced stresses. Conventional charging profiles for lithium-ion batteries (e.g., constant current followed by constant voltage or CC-CV) are not derived by considering capacity fade mechanisms, which are not only inefficient in terms of life-time usage of the batteries but are also slower by not taking into account the changing dynamics of the system. (C) The Author(s) 2014. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. All rights reserved.
Fell type topologies of quasi-pseudo-metric spaces and the Kuratowski-Painlevé convergence
Directory of Open Access Journals (Sweden)
Jesús Rodríguez-López
2001-04-01
Full Text Available We study the double Fell topology when this hypertopology is constructed over a quasi-pseudo-metric space. In particular, its relationship with the Wijsman hypertopology is studied. We also propose an extension of the Kuratowski-Painlevé convergence in the bitopological setting.
Two Listeria monocytogenes Pseudo-outbreaks Caused by Contaminated Laboratory Culture Media.
Matanock, Almea; Katz, Lee S; Jackson, Kelly A; Kucerova, Zuzana; Conrad, Amanda R; Glover, William A; Nguyen, Von; Mohr, Marika C; Marsden-Haug, Nicola; Thompson, Deborah; Dunn, John R; Stroika, Steven; Melius, Beth; Tarr, Cheryl; Dietrich, Stephen E; Kao, Annie S; Kornstein, Laura; Li, Zhen; Maroufi, Azarnoush; Marder, Ellyn P; Meyer, Rebecca; Perez-Osorio, Ailyn C; Reddy, Vasudha; Reporter, Roshan; Carleton, Heather; Tweeten, Samantha; Waechter, HaeNa; Yee, Lisa M; Wise, Matthew E; Davis, Kim; Jackson, Brendan R
2016-03-01
Listeriosis is a serious foodborne infection that disproportionately affects elderly adults, pregnant women, newborns, and immunocompromised individuals. Diagnosis is made by culturing Listeria monocytogenes from sterile body fluids or from products of conception. This report describes the investigations of two listeriosis pseudo-outbreaks caused by contaminated laboratory media made from sheep blood. Copyright © 2016, American Society for Microbiology. All Rights Reserved.
Constants and Pseudo-Constants of Coupled Beam Motion in the PEP-II Rings
Energy Technology Data Exchange (ETDEWEB)
Decker, F.J.; Colocho, W.S.; Wang, M.H.; Yan, Y.T.; Yocky, G.; /SLAC
2011-11-01
Constants of beam motion help as cross checks to analyze beam diagnostics and the modeling procedure. Pseudo-constants, like the betatron mismatch parameter or the coupling parameter det C, are constant till certain elements in the beam line change them. This can be used to visually find the non-desired changes, pinpointing errors compared with the model.
[A swollen, painless calf caused by neurogenic muscle (pseudo)-hypertrophy
Warrenburg, B.P.C. van de; Zwarts, M.J.; Engelen, B.G.M. van
2003-01-01
Neurogenic muscle (pseudo) hypertrophy of the calf was diagnosed in a 60-year-old man, who presented with chronic, painless and unilateral calf enlargement caused by a chronic S1 radiculopathy due to a lumbar disc hernia in the L5-S1 interspace. The differential diagnosis of a swelling of the calf
Regression analysis of censored data using pseudo-observations: An update
DEFF Research Database (Denmark)
Overgaard, Morten; Andersen, Per Kragh; Parner, Erik Thorlund
2015-01-01
We present updated versions of the stpsurv, stpci, and stpmean commands, which were introduced in Parner Andersen (2010, Stata Journal 10: 408–422), along with a new command, stplost. The commands generate pseudo-observations of the survival function, the cumulative incidence function under compe...
Importancia del Pseudo-Apolodoro para el lector de la Alcestis de Eurípides
Directory of Open Access Journals (Sweden)
Juan Antonio López Férez
2015-09-01
Full Text Available This paper, based on the reading and analysis of Euripidean Alcestis, wants to stress the importance of the tragic to understand the text of Pseudo-Apollodorus and, at the same time, to indicate the interest of the last one to complete and understand certain aspects of the mentioned play of Euripides
Kosmiese mag in Pseudo-Aristoteles, De mundo , en die Nuwe ...
African Journals Online (AJOL)
Cosmic power in Pseudo-Aristotle, De mundo, and the New Testament. In order to locate the cosmological views underlying the writings of Paul and other New Testament (NT) authors within their historical contexts it is necessary to compare them with other contemporary worldviews, such as those expressed in ...
Spacelike and timelike admissible Smarandache curves in pseudo-Galilean space
Directory of Open Access Journals (Sweden)
M. Khalifa Saad
2016-07-01
Full Text Available In this paper, we study space and timelike admissible Smarandache curves in the pseudo-Galilean space G31. Also, we obtain Smarandache curves of the position vector of space and timelike arbitrary curve with some of its special curves. Finally, we defray and illustrate some examples to confirm our main results.
[Chronic idiopathic intestinal pseudo-obstruction: visceral myopathy. Report of 4 cases].
de Pini, A F; de Dávila, M T; Marín, A; Guastavino, E; Ruiz, J A; De Rosa, S
1993-01-01
Chronic intestinal pseudo-obstruction is the term applied to a heterogeneous group of functional motility disorders sharing a common clinical expression: signs and symptoms of bowel obstruction in absence of mechanical occlusion. It is caused by ineffective intestinal propulsion. The chronic form of intestinal pseudo-obstruction may be primary or secondary. Primary pseudo-obstruction or chronic idiopathic pseudo-obstruction (CIIP) defines a group of propulsive disorders having no recognized underlying diseases. This study presents four female patients, aged between 4 months to 7 years, and makes a review of the literature. The symptoms, very similar in three of them, were bilious vomiting, abdominal distention and constipation, alternating with diarrhea and malnutrition. The fourth patient, different from the others in the age of onset and evolution, only had severe constipation and abdominal bloating. The diagnostic was made by full thickness biopsies during laparotomy, getting specimens by mapping, at different heights of intestine and stomach. Samples were studied by optic and electronic microscopy and visceral myopathies were found. None of them had urinary disorders. Medical treatment consisted of total parental nutrition and/or enteral nutrition. Cisapride was not effective in the two patients who received it.
Tsallis entropy and decoherence of CsI quantum pseudo dot qubit
Tiotsop, M.; Fotue, A. J.; Fotsin, H. B.; Fai, L. C.
2017-05-01
Polaron in CsI quantum pseudo dot under an electromagnetic field was considered, and the ground and first excited state energies were derived by employing the combining Pekar variational and unitary transformation methods. With the two-level system obtained, single qubit was envisioned and the decoherence was studied using non-extensive entropy (Tsallis entropy). Numerical results showed: (i) the increase (decrease) of the energy levels (period of oscillation) with the increase of chemical potential, the zero point of pseudo dot, cyclotron frequency, and transverse and longitudinal confinements; (ii) the Tsallis entropy evolved as a wave envelop that increase with the increase of non-extenxive parameter and with the increase of electric field strength, zero point of pseudo dot and cyclotron frequency the wave envelop evolve periodically with reduction of period; (iii) The transition probability increases from the boundary to the centre of the dot where it has its maximum value. It was also noted that the probability density oscillate with period T0 = ℏ / Δ Ε with the tunnelling of the chemical potential and zero point of the pseudo dot. These results are helpful in the control of decoherence in quantum systems and may also be useful for the design of quantum computers.
Pseudo-Random Number Generators for Vector Processors and Multicore Processors
DEFF Research Database (Denmark)
Fog, Agner
2015-01-01
Large scale Monte Carlo applications need a good pseudo-random number generator capable of utilizing both the vector processing capabilities and multiprocessing capabilities of modern computers in order to get the maximum performance. The requirements for such a generator are discussed. New ways ...
[A pseudo-outbreak of pharyngeal gonorrhoea related to a false-positive PCR-result
Verzijl, A.; Berretty, P.J.; Erceg, A.; Krekels, G.A.; Brule, A.J. van den; Boel, C.H.
2007-01-01
Nucleic acid amplification tests, including the polymerase chain reaction (PCR), are sensitive and specific tests that are often used for diagnosing sexually transmitted diseases (STDs). A pseudo-outbreak of pharyngeal gonorrhoea in a group of prostitutes turned out to have been caused by
Acoustic noise reduction in pseudo-continuous arterial spin labeling (pCASL)
van der Meer, Johan N.; Heijtel, Dennis F. R.; van Hest, Guus; Plattèl, Geert-Jan; van Osch, Matthijs J. P.; van Someren, Eus J. W.; Vanbavel, Ed T.; Nederveen, Aart J.
2014-01-01
While pseudo-continuous arterial spin labeling (pCASL) is a promising imaging technique to visualize cerebral blood flow, it is also (acoustically) very loud during labeling. In this paper, we reduced the labeling loudness on our scanner by increasing the interval between the RF pulses from the
Acoustic noise reduction in pseudo-continuous arterial spin labeling (pCASL)
van der Meer, Johan N; Heijtel, Dennis F R; van Hest, Guus; Plattèl, Geert-Jan; van Osch, Matthijs J P; van Someren, Eus J W; vanBavel, Ed T; Nederveen, Aart J
OBJECT: While pseudo-continuous arterial spin labeling (pCASL) is a promising imaging technique to visualize cerebral blood flow, it is also (acoustically) very loud during labeling. In this paper, we reduced the labeling loudness on our scanner by increasing the interval between the RF pulses from
Acoustic noise reduction in pseudo-continuous arterial spin labeling (pCASL)
van der Meer, J.N.; Heijtel, D.F.R.; van Hest, G.; Plattel, G.J.; van Osch, M.J.P.; van Someren, E.J.W.; Vanbavel, E.T.; Nederveen, A.J.
2014-01-01
Object: While pseudo-continuous arterial spin labeling (pCASL) is a promising imaging technique to visualize cerebral blood flow, it is also (acoustically) very loud during labeling. In this paper, we reduced the labeling loudness on our scanner by increasing the interval between the RF pulses from
DEFF Research Database (Denmark)
Trainer, Vera L.; Bates, Steve S.; Lundholm, Nina
2012-01-01
is complex and likely influenced by a suite of environmental factors that may be unique to a particular region. Advances in our knowledge of Pseudo-nitzschia sexual reproduction, also in field populations, illustrate its importance in bloom dynamics and toxicity. The combination of careful taxonomy...
Chavez Clemente, M.D.; Berentsen, P.B.M.; Oenema, O.; Oude Lansink, A.G.J.M.
2014-01-01
Fixed and random effect models were applied to a pseudo-panel data built of soil analysis reports from tobacco farms to analyze relationships between soil characteristics like soil organic matter (SOM) and soil nitrogen (N), phosphorous (P) and potassium (K) and to explore the potential for
Spin-Crossover in a Pseudo-tetrahedral Bis(formazanate) Iron Complex
Travieso-Puente, Raquel; Broekman, J.O.P.; Chang, Mu-Chieh; Demeshko, Serhiy; Meyer, Franc; Otten, Edwin
2016-01-01
Spin-crossover in a pseudo-tetrahedral bis(formazanate) iron(II) complex (1) is described. Structural, magnetic, and spectroscopic analyses indicate that this compound undergoes thermal switching between an S=0 and an S=2 state, which is very rare in four-coordinate complexes. The transition to the
Pseudo information entropy of a three-level atom interaction with two ...
Indian Academy of Sciences (India)
In this report we investigate some aspects of the pseudo entropy of multi-level system in the language of quantum information theory. The inﬂuence of ... M Abdel-Aty2. Mathematics Department, Faculty of Science, Al-Azhar University, Egypt; Mathematics Department, Faculty of Science, South Valley University, Sohag, Egypt ...
DEFF Research Database (Denmark)
Tong, M.S.; Lu, Y.; Chen, Y.
2005-01-01
A planar stratified dielectric slab medium, which is an interesting problem in optics and geophysics, is studied using a pseudo-spectral time-domain (PSTD) algorithm. Time domain electric fields and frequency domain propagation characteristics of both single and periodic dielectric slab...
Geometry of the Solutions of Localized Induction Equation in the Pseudo-Galilean Space
Directory of Open Access Journals (Sweden)
Muhittin Evren Aydin
2015-01-01
Full Text Available We study the surfaces corresponding to solutions of the localized induction equation in the pseudo-Galilean space G31. We classify such surfaces with null curvature and characterize some special curves on these surfaces in G31.
Yi, Yan; Liang, Ai-hua; Li, Chun-ying; Zhang, Yu-shi; Zhao, Yong; Han, Jia-yin; Lu, Yu-ting
2015-07-01
Choosing the right solvent and timely use is the basis of rational drug use and the most direct and efficient way to improve the safety of traditional Chinese medicine injections. This study aimed to evaluate the influence of solvent and drug preparation time on Shuanghuanglian injection inducing pseudo-allergic reactions with mouse mode. The two tests were carried out: (1) Comparative experiment between different solvent: Shuanghuanglian injection preparation to the appropriate concentration with 0.9% sodium chloride injection and 5% dextrose injection, mixed with Evans blue, at one time intravenous injected into mice, 30 minutes later, the mouse ears vascular permeability were observed and compared. (2) Comparative experiment among different preparation time: placed 10 min, 2.5 h, 6 h and 24 h after Shuanghuanglian injection were prepared and then to detect the pseudo-allergic reactions in mice using the same methods as in (1). The results showed that there was no significant difference in the pseudo-allergic reactions in mice which induced by the same dose of Shuanghuanglian injection, respectively with 0.9% sodium chloride injection and 5% dextrose injection preparation, and with the extension of preparation time, the degree of pseudo-allergic reactions of Shuanghuanglian injection was gradually severe.
Pseudo Control Hedging and its Application for Safe Flight Envelope Protection
Lombaerts, T.J.J.; Looye, G.H.N.; Chu, Q.P.; Mulder, J.A.
2010-01-01
This paper describes how the previously developed concept of Pseudo Control Hedging (PCH) can be integrated in a Fault Tolerant Flight Controller (FTFC) as a safe flight envelope protection system of the first degree. This PCH algorithm adapts the reference model for the system output in case of
Rapid expansion and pseudo spectral implementation for reverse time migration in VTI media
Pestana, Reynam C
2012-04-24
In isotropic media, we use the scalar acoustic wave equation to perform reverse time migration (RTM) of the recorded pressure wavefield data. In anisotropic media, P- and SV-waves are coupled, and the elastic wave equation should be used for RTM. For computational efficiency, a pseudo-acoustic wave equation is often used. This may be solved using a coupled system of second-order partial differential equations. We solve these using a pseudo spectral method and the rapid expansion method (REM) for the explicit time marching. This method generates a degenerate SV-wave in addition to the P-wave arrivals of interest. To avoid this problem, the elastic wave equation for vertical transversely isotropic (VTI) media can be split into separate wave equations for P- and SV-waves. These separate wave equations are stable, and they can be effectively used to model and migrate seismic data in VTI media where |ε- δ| is small. The artifact for the SV-wave has also been removed. The independent pseudo-differential wave equations can be solved one for each mode using the pseudo spectral method for the spatial derivatives and the REM for the explicit time advance of the wavefield. We show numerically stable and high-resolution modeling and RTM results for the pure P-wave mode in VTI media. © 2012 Sinopec Geophysical Research Institute.
Fractional and complex pseudo-splines and the construction of Parseval frames
DEFF Research Database (Denmark)
Massopust, Peter; Forster, Brigitte; Christensen, Ole
2017-01-01
in complex transform techniques for signal and image analyses. We also show that in analogue to the integer case, the generalized pseudo-splines lead to constructions of Parseval wavelet frames via the unitary extension principle. The regularity and approximation order of this new class of generalized...
Directory of Open Access Journals (Sweden)
Nadia Lamari
Full Text Available Oxylipins are low-molecular weight secondary metabolites derived from the incorporation of oxygen into the carbon chains of polyunsaturated fatty acids (PUFAs. Oxylipins are produced in many prokaryotic and eukaryotic lineages where they are involved in a broad spectrum of actions spanning from stress and defense responses, regulation of growth and development, signaling, and innate immunity. We explored the diversity in oxylipin patterns in the marine planktonic diatom Pseudo-nitzschia. This genus includes several species only distinguishable with the aid of molecular markers. Oxylipin profiles of cultured strains were obtained by reverse phase column on a liquid chromatograph equipped with UV photodiode detector and q-ToF mass spectrometer. Lipoxygenase compounds were mapped on phylogenies of the genus Pseudo-nitzschia inferred from the nuclear encoded hyper-variable region of the LSU rDNA and the plastid encoded rbcL. Results showed that the genus Pseudo-nitzschia exhibits a rich and varied lipoxygenase metabolism of eicosapentaenoic acid (EPA, with a high level of specificity for oxylipin markers that generally corroborated the genotypic delineation, even among genetically closely related cryptic species. These results suggest that oxylipin profiles constitute additional identification tools for Pseudo-nitzschia species providing a functional support to species delineation obtained with molecular markers and morphological traits. The exploration of the diversity, patterns and plasticity of oxylipin production across diatom species and genera will also provide insights on the ecological functions of these secondary metabolites and on the selective pressures driving their diversification.
Pseudo-outbreak of Phaeoacremonium parasiticum from a hospital ice dispenser.
Blake, Molly; Embil, John M; Trepman, Elly; Adam, Heather; Myers, Renelle; Mutcher, Pam
2014-08-01
In 31 patients, Phaeoacremonium parasiticum was recovered from bronchoscopy specimens (biopsies and aspirates). The pseudo-outbreak was caused by contaminated ice used to control hemorrhage during bronchoscopy and was associated with deficiencies in equipment cleaning. The bronchoscopy technique was modified, the ice dispenser was disinfected, bronchoscope reprocessing was improved, and there were no recurrences.
Students’ Ideas Regarding Science and Pseudo-science in Relation to the Human Body and Health
Directory of Open Access Journals (Sweden)
Mats Lundström
2009-04-01
Full Text Available This study investigates the pseudo-scientific and superstitious ideas Swedish upper-secondary students articulate and if there is a relationship between their ideas and their knowledge of the human body and health. The study is based on a questionnaire among 300 students in which the students were asked to consider statements related to different treatments that may influence the human body and health, and questions about physiology, health and nutrition. The analysis reveals that a relatively large group of students give credance to statements such as that some people can transfer thoughts or that the phases of the moon can affect a person’s health. The analysis also shows that there is no apparent relationship between the students’ pseudo-scientific beliefs and their scientific knowledge about the human body. Furthermore, although the results do not indicate a gender difference with regards to the power of faith in pseudo-scientific ideas, they do indicate that male and females consider these questions differently. The results imply a need for discussion and critical investigation in school science concerning the relationship between science and pseudo-scientific ideas in order to enhance critical thinking and development of the understanding of the nature of science.
A note on an unusual characterization of the pseudo-arc
van Mill, J.
2015-01-01
Lewis showed that the pseudo-arc is the unique nondegenerate continuum having the property that any two copies of it that are setwise near each other in terms of the Hausdorff distance are homeomorphically near each other. We present a new proof of this fact based on a well-known result of Bing,
Chronic intestinal pseudo-obstruction. Did you search for lysosomal storage diseases?
Politei, J; Durand, C; Schenone, A B; Torres, A; Mukdsi, J; Thurberg, B L
2017-06-01
Chronic intestinal pseudo-obstruction results in clinical manifestations that resemble intestinal obstruction but in the absence of any physical obstructive process. Fabry disease is an X-linked lysosomal storage disease characterized by the dysfunction of multiple systems, including significant gastrointestinal involvement. We report the occurrence of chronic intestinal pseudo-obstruction in two unrelated patients with Fabry disease and the possible explanation of a direct relation of these two disorders. In Fabry disease, gastrointestinal symptoms occur in approximately 70% of male patients, but the frequency ranges from 19% to 69% in different series. In some patients, colonic dysmotility due glycolipid deposition in autonomic plexus and ganglia can lead to the pseudo-obstruction syndrome, simulating intestinal necrosis. That is why up to this date colostomy has been performed in some cases, even for children with FD without cardiac, renal or cerebrovascular compromise. Early treatment with enzyme replacement therapy in asymptomatic or mildly symptomatic patients may be justified in order to prevent disease progression. Several studies have demonstrated that enzyme replacement therapy alleviates GI manifestations. Because of the non-specific nature of the gastrointestinal symptoms, diagnosis of Fabry disease is often delayed for several years. Gastrointestinal involvement is often misdiagnosed or under-reported. It is therefore very important to consider Fabry disease in the differential diagnosis of chronic intestinal pseudo-obstruction.
Chronic intestinal pseudo-obstruction. Did you search for lysosomal storage diseases?
Directory of Open Access Journals (Sweden)
J. Politei
2017-06-01
Full Text Available Chronic intestinal pseudo-obstruction results in clinical manifestations that resemble intestinal obstruction but in the absence of any physical obstructive process. Fabry disease is an X-linked lysosomal storage disease characterized by the dysfunction of multiple systems, including significant gastrointestinal involvement. We report the occurrence of chronic intestinal pseudo-obstruction in two unrelated patients with Fabry disease and the possible explanation of a direct relation of these two disorders. In Fabry disease, gastrointestinal symptoms occur in approximately 70% of male patients, but the frequency ranges from 19% to 69% in different series. In some patients, colonic dysmotility due glycolipid deposition in autonomic plexus and ganglia can lead to the pseudo-obstruction syndrome, simulating intestinal necrosis. That is why up to this date colostomy has been performed in some cases, even for children with FD without cardiac, renal or cerebrovascular compromise. Early treatment with enzyme replacement therapy in asymptomatic or mildly symptomatic patients may be justified in order to prevent disease progression. Several studies have demonstrated that enzyme replacement therapy alleviates GI manifestations. Because of the non-specific nature of the gastrointestinal symptoms, diagnosis of Fabry disease is often delayed for several years. Gastrointestinal involvement is often misdiagnosed or under-reported. It is therefore very important to consider Fabry disease in the differential diagnosis of chronic intestinal pseudo-obstruction.
The role of pseudo-translations in early Afrikaans travel writing ...
African Journals Online (AJOL)
The Afrikaans travel novel, Di Koningin fan Skeba (The Queen of Sheba) (1898a) is analysed within the framework of corpus-based translation studies. The pseudo-translations are compared to the rest of the narrative text of the Di Koningin fan Skeba, as well as to SJ du Toit's Di Bybel in Afrikaans (The Bible in Afrikaans) ...
Oesophageal stricture caused by lichen planus and intramural pseudo-diverticulosis
DEFF Research Database (Denmark)
Jensen, Jonas Sanberg; Lindebjerg, Jan; Jørgensen, Lars Stig
2017-01-01
We present the rare case of a proximal oesophageal stricture caused by a combination of oesophageal lichen planus without any other manifestations and intramural pseudo-diverticulosis, resulting in significant dysphagia. The diagnosis was not reached until a second set of biopsies were performed...
QTL analysis for early yield in a pseudo F 2 population of cassava ...
African Journals Online (AJOL)
Genetic mapping of early bulking in a full-sib population of cassava was continued in a selfed family of 268 cassava plants derived from a single progeny of the full-sib population. The pseudo F2 population was analysed with 122 segregating SSR markers. A previously constructed linkage map of cassava consisting of 22 ...
Pseudo-color coding method of infrared images based on human vision system
Zhang, Xiao; Bai, Tingzhu; Li, Hailan
2008-03-01
Infrared images often display in gray scale. The low contrast and the unclear visual effect are the most notable characters of infrared images that make difficult to observe. It is a fact that gray scale is not sensitive to human eyes, and it has only 60 to 90 just noticeable differences (JNDs). In comparison with gray scale, color scale might give up to 500 JNDs. Usually people can distinguish many kinds of colors much more than grays. And in gray images, human don't have the ability to tell apart the nuances about detail. Pseudo-color coding enhancement is the task of applying certain alterations to an input gray-image such as to obtain color-image that is a more visually pleasing. In this paper, we introduced a pseudo-color coding method based on human vision system for infrared images display. The HSI space is especially fit for human vision system and is viewed as an approximation of perceptual color space. So the pseudo-color coding method introduced is based on HSI space. In the first place, the individual functional relationship of Hue, Intensity, and Saturation with gray scale level is established. In the second place, the corresponding RGB values are obtained through transformation from the HSI color space to the RGB space. Lastly, the effect of Infrared images enhancement based on the pseudo-color coding method is displayed. Results indicate that this method is superior to other methods through the comparison.
Pseudo-egg and exotic egg adoption by Kelp Gulls Larus ...
African Journals Online (AJOL)
Ground-nesting birds, particularly larids, are known to include a variety of items in their nests as pseudo-eggs, as well as to adopt the eggs of conspecifics or other species. Three hypotheses have been put forward to explain this phenomenon: incubation stimulus, mistaken-food, and mistaken-egg hypotheses. Of 382 Kelp ...
Ab initio treatment of ion-water molecule collisions with a three-center pseudo potential
Martínez, Pablo A.; Errea, L. F.; Méndez, Laura González; Rabadán, Ismanuel
2012-01-01
We calculate electron capture cross sections in collisions of protons with water molecules, using two simple ab initio approaches. The formalism involves the calculation of one-electron scattering wave functions and the use of three-center pseudo potential to represent the electron H2O+ interaction. Several methods to obtain many-electron cross sections are considered
Two component WIMP-FImP dark matter model with singlet fermion, scalar and pseudo scalar
Energy Technology Data Exchange (ETDEWEB)
Dutta Banik, Amit; Pandey, Madhurima; Majumdar, Debasish [Saha Institute of Nuclear Physics, HBNI, Astroparticle Physics and Cosmology Division, Kolkata (India); Biswas, Anirban [Harish Chandra Research Institute, Allahabad (India)
2017-10-15
We explore a two component dark matter model with a fermion and a scalar. In this scenario the Standard Model (SM) is extended by a fermion, a scalar and an additional pseudo scalar. The fermionic component is assumed to have a global U(1){sub DM} and interacts with the pseudo scalar via Yukawa interaction while a Z{sub 2} symmetry is imposed on the other component - the scalar. These ensure the stability of both dark matter components. Although the Lagrangian of the present model is CP conserving, the CP symmetry breaks spontaneously when the pseudo scalar acquires a vacuum expectation value (VEV). The scalar component of the dark matter in the present model also develops a VEV on spontaneous breaking of the Z{sub 2} symmetry. Thus the various interactions of the dark sector and the SM sector occur through the mixing of the SM like Higgs boson, the pseudo scalar Higgs like boson and the singlet scalar boson. We show that the observed gamma ray excess from the Galactic Centre as well as the 3.55 keV X-ray line from Perseus, Andromeda etc. can be simultaneously explained in the present two component dark matter model and the dark matter self interaction is found to be an order of magnitude smaller than the upper limit estimated from the observational results. (orig.)
Development of an injectable pseudo-bone thermo-gel for application in small bone fractures.
Kondiah, Pariksha J; Choonara, Yahya E; Kondiah, Pierre P D; Kumar, Pradeep; Marimuthu, Thashree; du Toit, Lisa C; Pillay, Viness
2017-03-30
A pseudo-bone thermo-gel was synthesized and evaluated for its physicochemical, mechanical and rheological properties, with its application to treat small bone fractures. The pseudo-bone thermo-gel was proven to have thermo-responsive properties, behaving as a solution in temperatures below 25°C, and forming a gelling technology when maintained at physiological conditions. Poly propylene fumerate (PPF), Pluronic F127 and PEG-PCL-PEG were strategically blended, obtaining a thermo-responsive delivery system, to mimic the mechanical properties of bone with sufficient matrix hardness and resilience. A Biopharmaceutics Classification System (BCS) class II drug, simvastatin, was loaded in the pseudo-bone thermo-gel, selected for its bone healing properties. In vitro release analysis was undertaken on a series of experimental formulations, with the ideal formulations obtaining its maximum controlled drug release profile up to 14days. Ex vivo studies were undertaken on an induced 4mm diameter butterfly-fractured osteoporotic human clavicle bone samples. X-ray, ultrasound as well as textural analysis, undertaken on the fractured bones before and after treatment displayed significant bone filling, matrix hardening and matrix resilience properties. These characteristics of the pseudo-bone thermo-gel thus proved significant potential for application in small bone fractures. Copyright © 2017 Elsevier B.V. All rights reserved.
ON THE GAUSS MAP OF RULED SURFACES OF TYPE II IN 3-DIMENSIONAL PSEUDO-GALILEAN SPACE
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Alper Osman Öğrenmis
2013-02-01
Full Text Available In this paper, ruled surfaces of type II in a three-dimensional Pseudo-Galilean space are given. By studying its Gauss map and Laplacian operator, we obtain a classification of ruled surfaces of type II in a three-dimensional Pseudo-Galilean space.
1.2 GBit/s Pseudo Random Pulse Generator Using Multiplexing with GaAs Mesfet Gates
DEFF Research Database (Denmark)
Hede, Carsten
1978-01-01
A l.2 Gbit/s RZ pseudo random bit generator using multiplexing of six 200 Mbit/s channels, and a GaAs-MESFET gate circuit which exhibits both high speed and simplicity are presented. As a new contribution to the treatment of pseudo random sequences it is shown how the autocorrelation function and...
On the gauss map of ruled surfaces of type ii in 3-dimensional Pseudo-Galilean space
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Alper Osman Öğrenmiş
2013-12-01
Full Text Available In this paper, ruled surfaces of type II in a three-dimensional Pseudo-Galilean space are given. By studying its Gauss map and Laplacian operator, we obtain a classification of ruled surfaces of type II in a three-dimensional Pseudo-Galilean space.
Ceph: A Scalable, High-Performance Distributed File System
Weil, Sage; Brandt, Scott A.; Miller, Ethan L; Long, Darrell D. E.; Maltzahn, Carlos
2006-01-01
We have developed Ceph, a distributed file system that provides excellent performance, reliability, and scala- bility. Ceph maximizes the separation between data and metadata management by replacing allocation ta- bles with a pseudo-random data distribution function (CRUSH) designed for heterogeneous and dynamic clus- ters of unreliable object storage devices (OSDs). We leverage device intelligence by distributing data replica- tion, failure detection and recovery to semi-autonomous ...
Effective potential of the three-dimensional Ising model: The pseudo-ϵ expansion study
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A.I. Sokolov
2017-08-01
Full Text Available The ratios R2k of renormalized coupling constants g2k that enter the effective potential and small-field equation of state acquire the universal values at criticality. They are calculated for the three-dimensional scalar λϕ4 field theory (3D Ising model within the pseudo-ϵ expansion approach. Pseudo-ϵ expansions for the critical values of g6, g8, g10, R6=g6/g42, R8=g8/g43 and R10=g10/g44 originating from the five-loop renormalization group (RG series are derived. Pseudo-ϵ expansions for the sextic coupling have rapidly diminishing coefficients, so addressing Padé approximants yields proper numerical results. Use of Padé–Borel–Leroy and conformal mapping resummation techniques further improves the accuracy leading to the values R6⁎=1.6488 and R6⁎=1.6490 which are in a brilliant agreement with the result of advanced lattice calculations. For the octic coupling the numerical structure of the pseudo-ϵ expansions is less favorable. Nevertheless, the conform-Borel resummation gives R8⁎=0.868, the number being close to the lattice estimate R8⁎=0.871 and compatible with the result of 3D RG analysis R8⁎=0.857. Pseudo-ϵ expansions for R10⁎ and g10⁎ are also found to have much smaller coefficients than those of the original RG series. They remain, however, fast growing and big enough to prevent obtaining fair numerical estimates.
Pseudo-fovea formation after gene therapy for RPE65-LCA.
Cideciyan, Artur V; Aguirre, Geoffrey K; Jacobson, Samuel G; Butt, Omar H; Schwartz, Sharon B; Swider, Malgorzata; Roman, Alejandro J; Sadigh, Sam; Hauswirth, William W
2014-12-23
The purpose of this study was to evaluate fixation location and oculomotor characteristics of 15 patients with Leber congenital amaurosis (LCA) caused by RPE65 mutations (RPE65-LCA) who underwent retinal gene therapy. Eye movements were quantified under infrared imaging of the retina while the subject fixated on a stationary target. In a subset of patients, letter recognition under retinal imaging was performed. Cortical responses to visual stimulation were measured using functional magnetic resonance imaging (fMRI) in two patients before and after therapy. All patients were able to fixate on a 1° diameter visible target in the dark. The preferred retinal locus of fixation was either at the anatomical fovea or at an extrafoveal locus. There were a wide range of oculomotor abnormalities. Natural history showed little change in oculomotor abnormalities if target illuminance was increased to maintain target visibility as the disease progressed. Eleven of 15 study eyes treated with gene therapy showed no differences from baseline fixation locations or instability over an average of follow-up of 3.5 years. Four of 15 eyes developed new pseudo-foveas in the treated retinal regions 9 to 12 months after therapy that persisted for up to 6 years; patients used their pseudo-foveas for letter identification. fMRI studies demonstrated that preservation of light sensitivity was restricted to the cortical projection zone of the pseudo-foveas. The slow emergence of pseudo-foveas many months after the initial increases in light sensitivity points to a substantial plasticity of the adult visual system and a complex interaction between it and the progression of underlying retinal disease. The visual significance of pseudo-foveas suggests careful consideration of treatment zones for future gene therapy trials. (ClinicalTrials.gov number, NCT00481546.). Copyright 2015 The Association for Research in Vision and Ophthalmology, Inc.
Pseudo-nitzschia challenged with co-occurring viral communities display diverse infection phenotypes
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Michael Curtis Grier Carlson
2016-04-01
Full Text Available Viruses are catalysts of biogeochemical cycling, architects of microbial community structure, and terminators of phytoplankton blooms. Viral lysis of diatoms, a key group of eukaryotic phytoplankton, has the potential to impact carbon export and marine food webs. However, the impact of viruses on diatom abundance and community composition is unknown. Diatom-virus dynamics were explored by sampling every month at 2 coastal and estuarine locations in Washington state, USA resulting in 41 new isolates of the pennate diatom Pseudo-nitzschia and 20 environmental virus samples. We conducted a total of 820 pair-wise crosses of the Pseudo-nitzschia isolates and viral communities. Viral communities infected Pseudo-nitzschia isolates in 8% of the crosses overall and 16% of crosses when the host and viral communities were isolated from the same sample. Isolates ranged in their permissivity to infection with some isolates not infected by any viral samples and others infected by up to 10 viral communities. Isolates that were infected by the most viral communities also had the highest maximum observed viral titers (as high as 16000 infectious units ml-1. Titers of the viral communities were host dependent, as titers for one viral sample on 8 different hosts spanned 4 orders of magnitude. Sequencing of the Pseudo-nitzschia Internal Transcribed Spacer 1 (ITS1 of the revealed multiple subgroups of hosts with 100% ITS1 identity that were infected by different viral communities. Indeed, we repeatedly isolated groups of isolates with identical ITS1 sequences from the same water sample that displayed different viral infection phenotypes. The interactions between Pseudo-nitzschia and the viral communities highlight the diversity of diatoms and emphasize the complexity and variability of diatom-virus dynamics in the ocean.
Effective potential of the three-dimensional Ising model: The pseudo-ɛ expansion study
Sokolov, A. I.; Kudlis, A.; Nikitina, M. A.
2017-08-01
The ratios R2k of renormalized coupling constants g2k that enter the effective potential and small-field equation of state acquire the universal values at criticality. They are calculated for the three-dimensional scalar λϕ4 field theory (3D Ising model) within the pseudo-ɛ expansion approach. Pseudo-ɛ expansions for the critical values of g6, g8, g10, R6 =g6 / g42 , R8 =g8 / g43 and R10 =g10 / g44 originating from the five-loop renormalization group (RG) series are derived. Pseudo-ɛ expansions for the sextic coupling have rapidly diminishing coefficients, so addressing Padé approximants yields proper numerical results. Use of Padé-Borel-Leroy and conformal mapping resummation techniques further improves the accuracy leading to the values R6* = 1.6488 and R6* = 1.6490 which are in a brilliant agreement with the result of advanced lattice calculations. For the octic coupling the numerical structure of the pseudo-ɛ expansions is less favorable. Nevertheless, the conform-Borel resummation gives R8* = 0.868, the number being close to the lattice estimate R8* = 0.871 and compatible with the result of 3D RG analysis R8* = 0.857. Pseudo-ɛ expansions for R10* and g10* are also found to have much smaller coefficients than those of the original RG series. They remain, however, fast growing and big enough to prevent obtaining fair numerical estimates.
Nicolaou, Georgios
2016-01-01
This paper presents the misestimation of temperature when observations from a kappa distributed plasma are analyzed as a Maxwellian. One common method to calculate the space plasma parameters is by fitting the observed distributions using known analytical forms. More often, the distribution function is included in a forward model of the instrument's response, which is used to reproduce the observed energy spectrograms for a given set of plasma parameters. In both cases, the modeled plasma distribution fits the measurements to estimate the plasma parameters. The distribution function is often considered to be Maxwellian even though in many cases the plasma is better described by a kappa distribution. In this work we show that if the plasma is described by a kappa distribution, the derived temperature assuming Maxwell distribution can be significantly off. More specifically, we derive the plasma temperature by fitting a Maxwell distribution to pseudo-data produced by a kappa distribution, and then examine the d...
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M. T. Muñoz-Yagüe
2006-04-01
Full Text Available Chronic intestinal pseudo-obstruction is an uncommon syndrome characterized by relapsing episodes suggesting intestinal obstruction during which no mechanical causes are identified to account for symptoms. Etiologic factors may be manifold. Among them a number of neurologic conditions, gastrointestinal smooth muscle myopathies, endocrino-metabolic and autoimmune diseases, and the use of selected drugs stand out. We report a case of chronic intestinal pseudo-obstruction originating in a sporadic, primary intestinal myopathy that corresponds to no type thus far described. A histological study of the intestinal wall showed disrupted muscle bundles and the presence of interstitial edema. Myocytes had severe degenerative changes, and no alterations were seen in submucosal and myenteric plexus neurons. The activity of enzyme complexes in the mitochondrial respiratory chain, and of thymidine phosphorylase was normal. No mitochondrial DNA changes were seen.La pseudo-obstrucción intestinal crónica es un síndrome infrecuente caracterizado por episodios recidivantes, sugestivos de obstrucción intestinal, durante los cuales no se detectan causas mecánicas que justifiquen la sintomatología. Los factores etiológicos pueden ser múltiples. Entre ellos destacan diversas enfermedades neurológicas, miopatías de la musculatura lisa gastrointestinal, enfermedades endocrino-metabólicas y autoinmunes y el uso de determinados fármacos. Presentamos un caso de pseudo-obstrucción intestinal crónica originada por una miopatía intestinal primaria y esporádica que no corresponde a ningún tipo descrito hasta el momento. El estudio histológico de la pared intestinal mostró que los haces musculares estaban desestructurados y que existía edema intersticial. Los miocitos presentaban marcados cambios degenerativos y no existían alteraciones en las neuronas de los plexos submucoso y mientérico. La actividad de los complejos enzimáticos de la cadena
Energy Technology Data Exchange (ETDEWEB)
Zheng, Yingning; Chai, Yaqin, E-mail: yqchai@swu.edu.cn; Yuan, Yali; Yuan, Ruo, E-mail: yuanruo@swu.edu.cn
2014-06-27
Highlights: • Pt–Pd nanowires were combined with pseudo triple-enzyme electrochemical aptasensor. • Pt–Pd nanowires served as signal enhancer. • Labeling process, deactivation and spatial distribution of enzymes were solved. - Abstract: Our present work aimed at developing a pseudo triple-enzyme cascade electrocatalytic electrochemical aptasensor for determination of thrombin with the amplification of alcohol dehydrogenase (ADH)-Pt–Pd nanowires bionanocomposite and hemin/G-quadruplex structure that simultaneously acted as NADH oxidase and HRP-mimicking DNAzyme. With the addition of ethanol to the electrolyte, the ADH immobilized on the Pt–Pd nanowires catalyzed ethanol to acetaldehyde accompanied by NAD{sup +} being converted to NADH. Then the hemin/G-quadruplex firstly served as NADH oxidase, converting the produced NADH to NAD{sup +} with the concomitant local formation of high concentration of H{sub 2}O{sub 2}. Subsequently, the hemin/G-quadruplex acted as HRP-mimicking DNAzyme, bioelectrocatalyzing the produced H{sub 2}O{sub 2}. At the same time, the Pt–Pd nanowires employed in our strategy not only provided a large surface area for immobilizing thrombin binding aptamer (TBA) and ADH, but also served as HRP-mimicking DNAzyme which rapidly bioelectrocatalyzed the reduction of the produced H{sub 2}O{sub 2}. Thus, such a pseudo triple-enzyme cascade electrochemical aptasensor could greatly promote the electron transfer of hemin and resulted in the dramatic enhancement of electrochemical signal. As a result, a wide dynamic concentration linear range from 0.2 pM to 20 nM with a low detection limit of 0.067 pM for thrombin (TB) determination was obtained. The excellent performance indicated that our strategy was a promising way for ultrasensitive assays in electrochemical aptasensors.
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Aimé Lachal
2014-01-01
Full Text Available Let N be a positive integer, c a positive constant and (ξnn≥1 be a sequence of independent identically distributed pseudorandom variables. We assume that the ξn’s take their values in the discrete set {-N,-N+1,…,N-1,N} and that their common pseudodistribution is characterized by the (positive or negative real numbers ℙ{ξn=k}=δk0+(-1k-1c(2Nk+N for any k∈{-N,-N+1,…,N-1,N}. Let us finally introduce (Snn≥0 the associated pseudorandom walk defined on ℤ by S0=0 and Sn=∑j=1nξj for n≥1. In this paper, we exhibit some properties of (Snn≥0. In particular, we explicitly determine the pseudodistribution of the first overshooting time of a given threshold for (Snn≥0 as well as that of the first exit time from a bounded interval. Next, with an appropriate normalization, we pass from the pseudorandom walk to the pseudo-Brownian motion driven by the high-order heat-type equation ∂/∂t=(-1N-1c∂2N/∂x2N. We retrieve the corresponding pseudodistribution of the first overshooting time of a threshold for the pseudo-Brownian motion (Lachal, 2007. In the same way, we get the pseudodistribution of the first exit time from a bounded interval for the pseudo-Brownian motion which is a new result for this pseudoprocess.
Perawatan Maloklusi Pseudo Kelas III dengan Alat Ortodontik Cekat Teknik Begg
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Robertus Meidiyanto
2016-10-01
Full Text Available Latar Belakang: Maloklusi Pseudo kelas III ditandai dengan hubungan yang tidak harmonis antara relasi anteroposterior rahang dan posisi mandibula terhadap maksila. Ketidakharmonisan tersebut dapat disebabkan karena mandibula yang normal dengan maksila retrusif. Maloklusi pseudo kelas III mempunyai perhitungan yang menunjukkan bentuk antara klas I dan skeletal klas III. Perbedaanya hanya pada sudut gonial dimana pada skeletal klas III sudutnya lebih tumpul, sedangkan pada sampel pseudo klas III, sudut gonial lebih mirip dengan klas I. Perawatan ortodontik dengan alat cekat teknik Begg dapat juga untuk merawat maloklusi Angle kelas III, termasuk maloklusi skeletal yang menyertainya. Tujuan: memaparkan perubahan dental dan skeletal setelah perawatan dengan alat cekat teknik Begg. Kasus: perempuan 20 tahun mengeluhkan gigi-gigi rahang atas ada yang tumbuh di belakang dan rahang bawah nyakil sehingga menganggu penampilan dan mengurangi rasa percaya diri. Diagnosis: Maloklusi Angle Klas III subdivisi serta hubungan skeletal klas III dengan maksila retrusif dan mandibula protusif disertai Crossbite: 12, 11, 21, 22 terhadap 34, 32,31, 41, 42, 43. Perawatan: menggunakan alat cekat teknik Begg tanpa pencabutan. Kesimpulan: Hasil menunjukkan crowded terkoreksi, overjet dan overbite terkoreksi, relasi molar menjadi klas I. Background: Pseudo class III malocclusion characterized by disharmony between anteroposterior relationship of jaw and mandibulae position toward maxilla. This disharmony cause by normally shaped mandibles and underveloped maxillae. Pseudo clas III malocclusion is an intermediate form between class I and skeletal clas III malocclusion. The only exception was the gonial angle, which was generally more obtuse in the skeletal class III sample. Measurement of gonial angle in the pseudo class III sample was found to be rather similar to class I sample. Fixed Begg orthodontic appliance can be used to treat Angle’s class III malocclusion
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Filipa Afonso
2010-01-01
Full Text Available No contexto da Metafísica Medieval, a «beleza» foi pensada como um conceito ambíguo: ora atribuído a Deus, ora atribuído ao Mundo. O propósito deste artigo é clarificar o sentido desta ambiguidade no âmbito da filosofia do Pseudo-Dionísio Areopagita. Se, portanto, o conceito de «beleza» é, em primeiro lugar, despojado do seu carácter sensível e mundano, para ser apropriado à natureza divina, ele é, num segundo momento, aposto à própria criação, de forma a designar a manifestação visível da beleza transcendente e o chamamento vital para a perscrutação teológica.In the scope of Medieval Metaphysics, «beauty» has been pondered as an ambiguous concept: either attributed to God, or to the World. The aim of this article is to clarify the meaning of this ambiguity within the philosophy of the Pseudo-Dionysius the Areopagite. If, therefore, the concept of «beauty» is primarily withdrawn from its sensible and mundane feature in order to be appropriated to the divine nature, it is secondly apposed to creation itself so that it may designate the visible manifestation of transcendent beauty and vital call to theological pursuit.
Energy Technology Data Exchange (ETDEWEB)
Zhang, Yufeng; Wang, Xiaoan; Wo, Siukwan [School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong (China); Ho, Hingman; Han, Quanbin [School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong (China); Fan, Xiaohui [College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058 (China); Zuo, Zhong, E-mail: joanzuo@cuhk.edu.hk [School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong (China)
2015-01-01
Highlights: • Novel stepwise component detection algorithm (SCDA) for LC–MS datasets. • New isotopic distribution and adduct-ion models for mass spectra. • Automatic component classification based on adduct-ion and isotopic distributions. - Abstract: Resolving components and determining their pseudo-molecular ions (PMIs) are crucial steps in identifying complex herbal mixtures by liquid chromatography–mass spectrometry. To tackle such labor-intensive steps, we present here a novel algorithm for simultaneous detection of components and their PMIs. Our method consists of three steps: (1) obtaining a simplified dataset containing only mono-isotopic masses by removal of background noise and isotopic cluster ions based on the isotopic distribution model derived from all the reported natural compounds in dictionary of natural products; (2) stepwise resolving and removing all features of the highest abundant component from current simplified dataset and calculating PMI of each component according to an adduct-ion model, in which all non-fragment ions in a mass spectrum are considered as PMI plus one or several neutral species; (3) visual classification of detected components by principal component analysis (PCA) to exclude possible non-natural compounds (such as pharmaceutical excipients). This algorithm has been successfully applied to a standard mixture and three herbal extract/preparations. It indicated that our algorithm could detect components’ features as a whole and report their PMI with an accuracy of more than 98%. Furthermore, components originated from excipients/contaminants could be easily separated from those natural components in the bi-plots of PCA.
Directionally solidified pseudo-binary eutectics of Ni-Cr-/Hf,Zr/
Kim, Y. G.; Ashbrook, R. L.
1975-01-01
This report is concerned with the experimental determination of pseudo binary eutectic compositions and the directional solidification of the Ni-Cr-Hf,Zr, and Ni-Cr-Zr eutectic alloys. To determine unknown eutectics, chemical analyses were made of material bled from near eutectic ingots during incipient melting. Nominal compositions in weight per cent of Ni-18.6Cr-24.0Hf, Ni-19.6Cr-12.8Zr-2.8Hf, and Ni-19.2Cr-14.8Zr formed aligned pseudo-binary eutectic structures. The melting points were about 1270 C. The reinforcing intermetallic phases were identified as noncubic (Ni,Cr)7Hf2 and (Ni,Cr)7(Hf,Zr)2, and face centered cubic (Ni,Cr)5Zr. The volume fraction of the reinforcing phases were about 0.5.
Singh, Vivek; Yu, Yixuan; Sun, Qi-C; Korgel, Brian; Nagpal, Prashant
2014-12-21
While silicon nanostructures are extensively used in electronics, the indirect bandgap of silicon poses challenges for optoelectronic applications like photovoltaics and light emitting diodes (LEDs). Here, we show that size-dependent pseudo-direct bandgap transitions in silicon nanocrystals dominate the interactions between (photoexcited) charge carriers and phonons, and hence the optoelectronic properties of silicon nanocrystals. Direct measurements of the electronic density of states (DOS) for different sized silicon nanocrystals reveal that these pseudo-direct transitions, likely arising from the nanocrystal surface, can couple with the quantum-confined silicon states. Moreover, we demonstrate that since these transitions determine the interactions of charge carriers with phonons, they change the light emission, absorption, charge carrier diffusion and phonon drag (Seebeck coefficient) in nanoscaled silicon semiconductors. Therefore, these results can have important implications for the design of optoelectronics and thermoelectric devices based on nanostructured silicon.
Pseudo-spin band in the odd-odd nucleus {sup 172}Lu
Energy Technology Data Exchange (ETDEWEB)
Venkova, T. [Institut fuer Kernphysik, Forschungszentrum Juelich, D-52425, Juelich (Germany); Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, BG-1784, Sofia (Bulgaria); Lieder, R.M.; Gast, W.; Podsvirova, E.; Jaeger, H.M.; Mihailescu, L. [Institut fuer Kernphysik, Forschungszentrum Juelich, D-52425, Juelich (Germany); Bazzacco, D.; Menegazzo, R.; Lunardi, S.; Alvarez, C. Rossi; Ur, C.; Martinez, T. [Dipartimento di Fisica dell' Universita and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131, Padova (Italy); Angelis, G. de; Axiotis, M.; Napoli, D. [Laboratori Nazionali di Legnaro, Istituto Nazionale di Fisica Nucleare, I-35020, Legnaro (Italy); Urban, W.; Rzaca-Urban, T. [Institute of Experimental Physics, University of Warsaw, PL-00-681, Warszawa (Poland); Frauendorf, S. [Department of Physics, University of Notre Dame, Notre Dame, IN (United States)
2003-09-01
High-spin states in the odd-odd nucleus {sup 172}Lu have been populated in a {sup 170}Er({sup 7}Li,5n) reaction and the emitted {gamma}-radiation was detected with the GASP array. Two sequences of a new identical band have been observed with the transition energies in the favoured and unfavoured sequences being identical within {approx}3 keV at low spins and {approx}1 keV at high spins over the whole observed spin range. An interpretation as a pseudo-spin singlet band of {pi}1/2{sup -} [541] x {nu}1/2{sup -} [420] configuration is proposed. It represents the best example of a pseudo-spin singlet band in normal deformed nuclei known until now. (orig.)
Pseudo-bimolecular [2+2] cycloaddition studied by time-resolved photoelectron spectroscopy
DEFF Research Database (Denmark)
Brogaard, Rasmus Y; Boguslavskiy, Andrey E; Schalk, Oliver
2011-01-01
The first study of pseudo-bimolecular cycloaddition reaction dynamics in the gas phase is presented. We used femtosecond time-resolved photoelectron spectroscopy (TRPES) to study the [2+2] photocycloaddition in the model system pseudo-gem-divinyl[2.2]paracyclophane. From X-ray crystal diffraction...... measurements we found that the ground-state molecule can exist in two conformers; a reactive one in which the vinyl groups are immediately situated for [2+2] cycloaddition and a nonreactive conformer in which they point in opposite directions. From the measured S(1) lifetimes we assigned a clear relation...... between the conformation and the excited-state reactivity; the reactive conformer has a lifetime of 13 ps, populating the ground state through a conical intersection leading to [2+2] cycloaddition, whereas the nonreactive conformer has a lifetime of 400 ps. Ab initio calculations were performed to locate...
The Lightest Pseudo-Goldstone Boson at Future $e^{+}e^{-}$ Colliders
Casalbuoni, R.; De Curtis, S.; Dominici, D.; Gatto, Raoul; Gunion, J.F.
1999-01-01
In a class of models of dynamical symmetry breaking not ruled out by the available data, the lightest neutral pseudo-Nambu-Goldstone boson P0 contains only down-type techniquarks and charged technileptons. Its mass scale is naturally determined by the b-quark and therefore it is likely to be light. As the presence of pseudo-Nambu-Goldstone bosons in models of dynamical symmetry breaking is a quite general feature, the search of the P0 at colliders is an interesting opportunity of putting limits on or discovering a dynamical electroweak symmetry breaking scenario. In this note we discuss the prospects for discovering and studying the P0 at future e+e- and gamma-gamma colliders.
Directory of Open Access Journals (Sweden)
Charalampos Seretis
2012-06-01
Full Text Available Intestinal pseudo-obstruction is considered to be one of the most frequent gastrointestinal manifestations of myasthenia gravis, accompanied by the presence of neoplasia of the thymus gland in the vast majority of the cases presented in the international literature. Despite the fact that myasthenia gravis has been implicated to be the cause of recurrent episodes of intestinal pseudo-obstruction, adhesive ileus has never been reported to complicate this – in any sense rare – condition. We present a unique case of a patient with myasthenia gravis, free of thymus neoplasia, who was submitted to emergency surgery due to the presence of extended adhesive ileus as a complication of chronic intestinal functional obstruction.
Ogawa, S; Ashiura, M; Uchida, C
1998-02-01
Two kojibiose-type pseudo-disaccharides and a trisaccharide, containing a 5-amino-1,2,3,4-cyclopentanetetrol derivative or valienamine, linked by way of nitrogen bridges to the sugar residues, have been designed and synthesized as processing alpha-glucosidase I inhibitors. Synthesis of the pseudo-disaccharides was carried out starting from the coupling products of the sugar isothiocyanates and an aminocyclitol, respectively, by cyclization with mercury(II) oxide to the cyclic isoureas and subsequent deprotection. Pseudokojibiose was prepared in a poor yield by reaction of a protected valienamine and a sugar epoxide, followed by deprotection. Although the pseudooligosaccharides are all strong inhibitors of alpha-glucosidase (baker's yeast), they did not have any inhibitory potency against either sucrase isomaltase (rat intestine) or processing alpha-glucosidase (rat liver microsomes).
Quark mass dependence of pseudo-scalar masses and coupling constants qq+q Collaboration
Farchioni, F.; Gebert, C.; Montvay, I.; Scholz, E.; Scorzato, L.
2004-03-01
The dependence of pseudo-scalar masses and decay constants on the sea and valence quark masses is investigated in the pseudo- Goldstone boson sector of QCD with two light quark flavours. The sea quark masses are at present in the range {1}/{3}m s ≤ m ud ≤ {2}/{3}m s whereas the valence quark masses satisfy {1}/{2}m sea ≤ m val ≤ 2m sea. The values of the Gasser-Leutwyler low energy constants L4, L5, L6 and L8 are estimated. The computation is done with the Wilson-quark lattice action at gauge coupling β = 5.1 on 16 4 lattices. O(a) effects are taken into account by applying chiral perturbation theory for the Wilson lattice action as proposed by Rupak and Shoresh.
Some considerations concerning the alchemy of the De anima in arte alchemiae of pseudo-Avicenna.
Moureau, Sébastien
2009-03-01
This article explains some essential features of the alchemical doctrine of the De anima in arte alchemiae, a treatise written in Spain during the twelfth century (in Arabic, but only the Latin translation remains), and wrongly attributed to Avicenna. It shows that pseudo-Avicenna uses alchemical principles and elixir theory directly inspired by Jabirian texts, and classification of materials influenced by al-Razi. The alchemy of pseudo-Avicenna is entirely based on operations on the four elements: the alchemist has to reduce hair, blood or eggs to their elements, and isolate one of their essential properties (warmth, coldness, moisture and dryness), so that he can change the proportion of essential properties of the body he wants to transmute into gold or silver. The preparation made from hair, blood or eggs (the isolated property) is what he calls the elixir.
Energy Technology Data Exchange (ETDEWEB)
Ding, Yi; Wang, Peng; Goel, Lalit [Nanyang Technological University, School of Electrical and Electronics Engineering, Block S1, Nanyang Avenue, Singapore 639798 (Singapore); Billinton, Roy; Karki, Rajesh [Department of Electrical Engineering, University of Saskatchewan, Saskatoon (Canada)
2007-10-15
This paper presents a technique to evaluate reliability of a restructured power system with a bilateral market. The proposed technique is based on the combination of the reliability network equivalent and pseudo-sequential simulation approaches. The reliability network equivalent techniques have been implemented in the Monte Carlo simulation procedure to reduce the computational burden of the analysis. Pseudo-sequential simulation has been used to increase the computational efficiency of the non-sequential simulation method and to model the chronological aspects of market trading and system operation. Multi-state Markov models for generation and transmission systems are proposed and implemented in the simulation. A new load shedding scheme is proposed during generation inadequacy and network congestion to minimize the load curtailment. The IEEE reliability test system (RTS) is used to illustrate the technique. (author)
Scintigraphic diagnosis of pseudo-arthroses following Harrington's spondylodesis
Energy Technology Data Exchange (ETDEWEB)
Bostel, F.; Georgi, P.; Springorum, H.W.; Puhl, W.
1982-01-01
The development of pseudoarthroses is the most common complication following operative treatment of severe scoliosis. Early recognition of this event is important to prevent recurrence of the curvature. The diagnosis is not possible by radiological examination of the rigid spine. Routine reexploration implies a second operation, which is unnecessary in the majority of patients with stable fusion. In an attempt to develop a non-invasive method for the diagnosis of pseudo-arthroses, bone scintigrams were carried out in 29 patients with idiopathic scoliosis twelve months after a Harrington's spondylodesis. In 24 patients (82.8%) a definite conclusion could be drawn, either of stable fusion (65.5%) or pseudo-arthrosis formation (17.3%). No pseudoarthroses were missed by scintigraphy. These results indicate that bone scintigraphy plays an important role in the post-operative care after Harrington's spondylodesis.
Researching of the reduction of shock waves intensivity in the “pseudo boiling” layer
Pavlov, G. I.; Telyashov, D. A.; Kochergin, A. V.; Nakoryakov, P. V.; Sukhovaya, E. A.
2017-09-01
This article applies to the field of acoustics and deals with noise reduction of pulsating combustion chambers, in particular the reduction of the shock waves’ intensity with the help of pseudo boiling layer. In the course of work on a test stand that included a pulsator, a compressor with the receiver and a high pressure fan was simulated gas jet flowing from the chamber pulsating combustion and studied the effect of different types of fluidization on effect of reducing the sound pressure levels. Were obtained the experimental dependence of the sound pressure levels from parameters such as: height of the layer of granules; diameter of the used granules; amplitude of the pressure pulsations in the gas stream at the entrance to the camera; frequency of pressure pulsations. Based on the results of the study, it was concluded that the using of a pseudo boiling layer is promising for reducing shock wave noise.
Energy Technology Data Exchange (ETDEWEB)
Zhang, Yanwei [Key Laboratory of Low Dimensional Materials and Application Technology, Xiangtan University, Ministry of Education, Xiangtan, Hunan 411105 (China); State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China); Huang, Huixiang; Bi, Dawei [State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China); Tang, Minghua, E-mail: mhtang@xtu.edu.cn [Key Laboratory of Low Dimensional Materials and Application Technology, Xiangtan University, Ministry of Education, Xiangtan, Hunan 411105 (China); Zhang, Zhengxuan [State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China)
2014-01-15
The pseudo-MOS transistor is a quick and effective technique for characterizing the electrical properties of silicon-on-insulator (SOI) wafer. We investigated the total ionizing dose (TID) response of pseudo-MOS transistors fabricated on SOI wafers hardened by single or multiple step Si ion implantation. It is demonstrated that the two Si ion implantation methods can both improve the radiation hardness of SOI wafers owing to the generation of deep electron traps in the buried oxide (BOX). However, the lattice damage of top silicon film caused by the single step implantation compared with the multiple degenerates the electrical properties of transistors, especially for the sub-threshold swing. The high resolution transmission electron microscopy (HRTEM) was used to observe the lattice quality.
Pseudo-aneurisma post-traumático de tronco de arteria coronaria izquierda
Directory of Open Access Journals (Sweden)
Melina M. Gallo
2011-08-01
Full Text Available El pseudo-aneurisma de arteria coronaria es extremadamente raro. Su historia natural es poco conocida y su tratamiento discutido. Se presenta el caso de un paciente con pseudo-aneurisma de tronco de la coronaria izquierda e infarto antero-apical del ventrículo izquierdo cinco años después de un paro cardíaco secundario a un traumatismo no penetrante de tórax. Se consideró entonces que la lesión no era pasible de corrección percutánea o quirúrgica por lo que se optó por tratamiento médico conservador. Una angiografía coronaria por tomografía computarizada multicorte realizada 10 años después del evento inicial mostró ausencia de progresión de la lesión.
Arabi, Hossein; Koutsouvelis, Nikolaos; Rouzaud, Michel; Miralbell, Raymond; Zaidi, Habib
2016-09-01
-only) and atlas-guided AC. Dosimetric evaluation using dose volume histograms and the average difference between minimum/maximum absorbed doses revealed a mean error of less than 1% for the both target volumes and organs at risk. Two-dimensional (2D) gamma analysis of the isocenter dose distributions at 1%/1 mm criterion revealed pass rates of 91.40 ± 7.56%, 96.00 ± 4.11% and 97.67 ± 3.6% for MRI segmentation, atlas-guided and the proposed methods, respectively. The proposed method generates accurate pseudo-CT images from conventional Dixon MRI sequences with improved bone extraction accuracy. The approach is promising for potential use in PET AC and MRI-only or hybrid PET/MRI-guided RT treatment planning.
Doo, Kyung Won; Lee, Chang Hee; Choi, Jae Woong; Lee, Jongmee; Kim, Kyeong Ah; Park, Cheol Min
2009-12-01
The purpose of this article is to describe the "pseudo washout" sign of high-flow hepatic hemangioma that mimics hypervascular tumor on gadoxetic acid-enhanced MRI. High-flow hemangiomas might show relatively low signal intensity because of gadoxetic acid contrast uptake in the surrounding normal liver parenchyma during the equilibrium (3-minute delay) phase. Such findings are called pseudo washout and can mimic hypervascular hepatic tumors. However, high-flow hemangioma can be diagnosed by observing bright signal intensity on T2-weighted imaging, arterial phase-dominant enhancement, pseudo washout sign during the equilibrium phase, and isointense or slightly increased signal intensity on subtraction images.
Zabarylo, U.; Minet, O.
2010-01-01
Investigations on the application of optical procedures for the diagnosis of rheumatism using scattered light images are only at the beginning both in terms of new image-processing methods and subsequent clinical application. For semi-automatic diagnosis using laser light, the multispectral scattered light images are registered and overlapped to pseudo-coloured images, which depict diagnostically essential contents by visually highlighting pathological changes.
On-Surface Pseudo-High Dilution Synthesis of Macrocycles: Principle and Mechanism
Fan, Qitang; Wang, Tao; Dai, Jingya; Kuttner, Julian; Hilt, Gerhard (Prof. Dr.); Gottfried, J. Michael; Zhu, Junfa
2017-01-01
Macrocycles have attracted much attention due to their specific "endless" topology, which results in extraordinary properties compared to related linear (open-chain) molecules. However, challenges still remain in their controlled synthesis with well-defined constitution and geometry. Here, we report the first successful application of the (pseudo-)high dilution method to the conditions of on-surface synthesis in ultrahigh vacuum (UHV). This approach leads to high yields (up to 84%) of cyclic ...
Pseudo Prune Belly Syndrome: Diagnosis Revealed by Imaging ? A Case Report and Brief Review
Grover, Hemal; Sethi, Sanjay; Garg, Jatin; Ahluwalia, Amrit Pal
2017-01-01
Summary Background Prune Belly Syndrome (PBS) is a rare entity, usually found in male neonates. It comprises complex urinary tract anomalies, bilateral undescended testis and absence of anterior abdominal wall muscles. Patients with unilateral abdominal wall deficiency, unilateral undescended testis and female neonates with abdominal wall laxity are classified as Pseudo Prune Belly syndrome (PPBS). Reports on PPBS do not highlight the radiological and imaging characteristics of this syndrome ...
The Pseudo-Newtonian Force and Potential about a Higher Dimensional Rotating Black Hole
Sharif, M.
2007-01-01
In this paper, we study the behavior of the pseudo-Newtonian force and potential about a higher dimensional rotating black hole. We obtain conditions for the force character from an attractive to repulsive. We also find the conditions under which force attains a maximum value. The results of this paper generalizes the already found structure of force and potential about a five dimensional rotating black hole. It is interesting to note that we recover the five dimensional results under a speci...
Pseudo-atomic orbitals as basis sets for the O(N) DFT code CONQUEST
Energy Technology Data Exchange (ETDEWEB)
Torralba, A S; Brazdova, V; Gillan, M J; Bowler, D R [Materials Simulation Laboratory, UCL, Gower Street, London WC1E 6BT (United Kingdom); Todorovic, M; Miyazaki, T [National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Choudhury, R [London Centre for Nanotechnology, UCL, 17-19 Gordon Street, London WC1H 0AH (United Kingdom)], E-mail: david.bowler@ucl.ac.uk
2008-07-23
Various aspects of the implementation of pseudo-atomic orbitals (PAOs) as basis functions for the linear scaling CONQUEST code are presented. Preliminary results for the assignment of a large set of PAOs to a smaller space of support functions are encouraging, and an important related proof on the necessary symmetry of the support functions is shown. Details of the generation and integration schemes for the PAOs are also given.
Intestinal Pseudo-Obstruction as an Initial Manifestation of Systemic Lupus Erythematosus
Oh, Dong Jun; Yang, Jae Nam; Kang, Ji Hyuk; Park, Jung Hyun; Kim, Mal Young
2015-01-01
Intestinal pseudo-obstruction (IPO) is an uncommon, severe complication that occurs in a small subgroup of patients with systemic lupus erythematosus (SLE). To our knowledge, approximately 30 cases of IPO in SLE have been reported in the literature. Moreover, IPO is rare as an initial manifestation of SLE. We report a case of a 43-year-old woman with SLE who initially presented with IPO. PMID:26131004
Rationally Addicted to Cigarettes, Alcohol and Coffee? A Pseudo Panel Approach
Koksal, Aycan; Wohlgenant, Michael K.
2011-01-01
In this paper, using pseudo panel data we analyze the relation between cigarette, alcohol, and coffee consumption within the rational addiction framework. Our purpose in this study is twofold. First, we want to get more insights about behavioral processes concerning cigarette, alcohol and coffee consumption. Second, we hope that our attempt to generalize rational addiction model to include three addictive goods will be useful to generate further research in the related literature. We found th...
Mughal, M M; Irving, M H
1988-01-01
Three cases are described of end stage chronic intestinal pseudo-obstruction successfully treated by subtotal enterectomy and home parenteral nutrition (HPN). In all three patients prior use of drugs to stimulate gastrointestinal motility, antibiotics to suppress bacterial overgrowth and surgical bypass of dilated bowel had failed to alleviate the symptoms of chronic intestinal obstruction. Similarly parenteral nutrition combined with restriction of oral intake, although improving nutrition d...
Concurrent Generation of Pseudo Random Numbers with LFSR of Fibonacci and Galois Type
Emina I. Milovanović; Stojčev, Mile K.; Igor Ž. Milovanović; Tatjana R. Nikolić; Zoran Stamenković
2016-01-01
We have considered implementation of parallel test pattern generator based on a linear feedback shift register (LFSR) with multiple outputs used as a building block in built-in-self-test (BIST) design within SoC. The proposed design can drive several circuits under test (CUT) simultaneously. The mathematical procedure for concurrent pseudo random number (PRN) generation is described. We have implemented LFSRs that generate two and three PRNs in FPGA and ASIC technology. The design was tested ...
Holoprosencephaly with caudal dysplasia. Pseudo-trisomy 13 or a distinct entity?
Energy Technology Data Exchange (ETDEWEB)
Hicks, R.P.B.; Aylsworth, A.S. [Univ. of North Carolina at Chapel Hill, Durham, NC (United States); Timmons, M.C. [Duke Univ. Medical Center, Durham, NC (United States)
1994-09-01
We have studied three chromosomally normal patients with multiple anomalies that include holoprosencephaly and caudal dysplasia. Each has features found in patients with pseudo-trisomy 13, though each lacks malformations common in that syndrome. Patients 1 and 2 did not have polydactyly and patients 2 and 3 had no congenital heart malformation. Patient 1 is also unusual in that he does not have typical holoprosencephalic facies and is alive at age 25 months. We have also identified two other similar patients in the London Dysmorphology Database, each of which had holoprosencephaly, congenital heart malformation, and imperforate anus. Isolated caudal dysplasia and holoprosencephaly are both causally heterogeneous. They have been reported together rarely in patients with several different syndromes including chromosomal abnormalities, monogenic syndromes, teratogenic insults, and syndromes of unknown cause. Over thirty cases of {open_quotes}pseudo-trisomy 13{close_quotes} have now been reported and eight of these have had features of caudal dysplasia. There have been four with imperforate anus or anal stenosis, one with lumbosacral vertebral anomaly, and three others with bilateral renal agenesis or hypoplasia. Based on our patients and this review of other reported and unreported cases, we suggest that caudal dysplasia may be a significant clinical feature of pseudo-trisomy 13. Alternatively, holoprosencephaly and caudal dysplasia with a normal karyotype may represent a similar though distinct entity. Some may have submicroscopic chromosomal deletions. Molecular studies of regions known to be associated with holoprosencephaly are currently in progress on tissue from Patient 1. We hope these observations will stimulate reports of similarly affected patients to allow better definition of pseudo-trisomy 13 and other overlap syndromes.
Miopatia pseudo-hipertrófica por cisticercose: registro de caso
Directory of Open Access Journals (Sweden)
Maria Ines de Vilhena Lana-Peixoto
1985-12-01
Full Text Available O caso de uma paciente com aumento de volume das pernas, dor discreta e dificuldade para deambular é descrito. A eletromiografia mostrou potenciais de unidades motoras gigantes com padrão de interferência completo. A biópsia dos gastrocnêmius direito e esquerdo revelou presença de um cisticerco além de hipertrofia das fibras musculares e infiltrado inflamatório. A revisão da literatura demonstra que apenas 12 casos de miopatia pseudo-hipertrófica causada por cisticercos foram relatados e que a incidência é duas vezes maior no sexo masculino do que no feminino. Em cerca de metade dos casos há história de epilepsia. Dor e fraqueza muscular discretas são frequentes. Em geral a pseudo-hipertrofia ocorre nas cinturas escapular e pélvica simultaneamente. Miotonia é achado raro e nódulos subcutâneos estão presentes na maioria dos pacientes. Nosso paciente difere dos outros relatados na literatura por apresentar pseudo-hipertrofia restrita às pernas, principalmente à esquerda, com eletromiografia revelando potenciais de unidades motoras gigantes. A patogênese desta condição é discutida e o diagnóstico diferencial deve ser feito com distrofia muscular pseudo-hipertrófica, triquinose, miotonia congênita, hipotireoidismo, amiloidose e a forma juvenil da glicogenose do tipo I (doença de Pompe.
Method to Develop Pseudo Three-dimensional Dental Image from Dental Panoramic Radiograph
Kuroda, Tomohiro; Kaga, Tetsuro; Azuma, Hiroko; Yagi, Masakazu; Kuroda, Yoshihiro; Imura, Masataka; Oshiro, Osamu; Takada, Kenji
2011-01-01
Although three-dimensional imaging can be a powerful tool for dentists to explain treatments to patients, obtaining of three-dimensional image of teeth in general dental clinics is difficult. This paper proposed a method to develop pseudo three-dimensional dental image from conventional dental panoramic radiograph and dental impression. The method estimates imaging parameters of given panoramic radiograph through comparison with dental cast, and re-projects the radiograph into three-dimension...
Potential of polymethacrylate pseudo crown ethers as solid state polymer electrolytes.
Moins, S; Martins, J C; Krumpmann, A; Lemaur, V; Cornil, J; Delbosc, N; Decroly, A; Dubois, Ph; Lazzaroni, R; Gohy, J-F; Coulembier, O
2017-06-22
The association of kinetic studies, DFT calculations and 1 H- 7 Li NMR analyses allowed the control of the cyclo-ATRP of PEG 9 DMA and the production of polymethacrylate pseudo crown-ethers of various molar masses. Their potential to act as a solid-state polymer electrolyte in Li-ion batteries has been highlighted and may come from the supramolecular organization of the cyclo-PEG forming a Li + diffusion channel.
Generation of pseudo-CT from a single MRI for PET/MR attenuation correction purposes
Energy Technology Data Exchange (ETDEWEB)
Monnier, Florian; Fayad, Hadi; Bert, Julian; Lapuyade-Lahorgue, Jerome; Hatt, Mathieu [INSERM UMR 1101, LaTIM, Brest (France); Veit-Haibach, Patrick; Delso, Gaspar [Nuclear Medicine Department, University Hospital Zurich (Switzerland); Visvikis, Dimitris [INSERM UMR 1101, LaTIM, Brest (France)
2014-07-29
Current MR attenuation correction (AC) approaches suffer from the lack of precision in the detection of bone and the assigned attenuation coefficients. In general, no unique transformation of MR image intensities into attenuation coefficients exists. The purpose of this work is to derive attenuation coefficient maps from a single MR sequence through the generation of a pseudo-CT map using a derived MRI intensity - CT Hounsfield Units (HU) relationship.
Pseudo-Goldstone Higgs Doublets from Non-Vectorlike Grand Unified Higgs Sector
Hernández, A E Cárcamo
2016-01-01
We present a novel way of realizing the pseudo-Nambu-Goldstone boson mechanism for the doublet-triplet splitting in supersymmetric grand unified theories. The global symmetries of the Higgs sector are attributed to a non-vectorlike Higgs content, which is consistent with unbroken supersymmetry in a scenario with flat extra dimensions and branes. We also show how in such a model one can naturally obtain a realistic pattern for the Standard Model fermion masses and mixings.
Pseudo-Real-Time Wide Area Motion Imagery (WAMI) Processing for Dynamic Feature Detection
2015-07-06
new system. This system and is difficult to upgrade. We propose a Pseudo Real-time Exploitati ( PRESA ) framework for processing WAMI fra these...other hardware determining the stream proc The PRESA framework is built upon contai computing platform to achieve the necessary full WAMI frame is...is allocate of the computing resources. Even without a PRESA framework spatially parallelizes fr which may improve feature detector perform for
Novel bioactive materials: silica aerogel and hybrid silica aerogel/pseudo wollastonite
Energy Technology Data Exchange (ETDEWEB)
Resendiz-Hernandez, P. J.; Cortes-Hernandez, D. a.; Saldivar-Ramirez, M. M. G.; Acuna-gutierrez, I. O.; Flores-Valdes, A.; Torres-rincon, S.; Mendez-Nonell, J.
2014-07-01
Silica aerogel and hybrid silica aerogel/pseudo wollastonite materials were synthesized by controlled hydrolysis of tetraethoxysilane (TEOS) using also methanol (MeOH) and pseudo wollastonite particles. The gels obtained were dried using a novel process based on an ambient pressure drying. Hexane and hexamethyl-disilazane (HMDZ) were the solvents used to chemically modify the surface. In order to assess bioactivity, aerogels, without and with pseudowollastonite particles, were immersed in simulated body fluid (SBF) for 7 and 14 days. The hybrid silica aerogel/pseudo wollastonite showed a higher bioactivity than that observed for the single silica aerogel. However, as in both cases a lower bioactivity was observed, a biomimetic method was also used to improve it. In this particular method, samples of both materials were immersed in SBF for 7 days followed by their immersion in a more concentrated solution (1.5 SBF) for 14 days. A thick and homogeneous bonelike apatite layer was formed on the biomimetically treated materials. Thus, bioactivity was successfully improved even on the aerogel with no pseudowollastonite particles. As expected, the hybrid silica aerogel/pseudowollastonite particles showed a higher bioactivity. (Author)
The effect of pseudo-microgravity on the symbiosis of plants and microorganisms
Tomita-Yokotani, Kaori; Maki, Asano; Aoki, Toshio; Tamura, Kenji; Wada, Hidenori; Hashimoto, Hirofumi; Yamashita, Masamichi
The symbiosis of plants and microorganisms is important to conduct agriculture under space environment. However, we have less knowledge on whether this kind of symbiosis can be established under space condition. We examined the functional compounds responsible to symbiosis between rhizobiaum and Lotus japonicus as a model of symbiotic combination. The existence of the substances for their symbiosis, some flavonoids, have already been known from the study of gene expression, but the detail structures have not yet been elucidated. Pseudomicrogravity was generated by the 3D-clinorotation. Twenty flavonoids were found in the extracts of 16 days plants of Lotus japonicus grown under the normal gravity by HPLC. Content of two flavonoids among them was affected by the infection of Mesorhizobium loti to them. It has a possibility that the two flavonoids were key substances for their combination process. The productions of those flavonoids were confirmed also under the pseudo-microgravity. The amount of one flavonoid was increased by both infection of rhizobium and exposure to the normal and pseudo-micro gravity. Chemical species of these flavonoids were identified by LC- ESI/MS and spectroscopic analysis. To show the effects of pseudo-microgravity on the gene expression, enzymic activities related to the functional compounds are evaluated after the rhizobial infection.
Directionally solidified pseudo-binary eutectics of Ni-Cr-(Hf, Zr)
Kim, Y. G.; Ashbrook, R. L.
1975-01-01
A pseudo-binary eutectic, in which the intermetallic Ni7Hf2 reinforces the Ni-Cr solid solution phase, was previously predicted in the Ni-Cr-Hf system by a computer analysis. The experimental determination of pseudo binary eutectic compositions and the directional solidification of the Ni-Cr-Hf, Zr, and Ni-Cr-Zr eutectic alloys are discussed. To determine unknown eutectics, chemical analyses were made of material bled from near eutectic ingots during incipient melting. Nominal compositions in weight percent of Ni-18.6Cr-24.0HF, Ni19.6Cr-12.8Zr-2.8Hf, and Ni-19.2Cr-14.8Zr formed aligned pseudo-binary eutectic structures. The melting points were about 1270 C. The reinforcing intermetallic phases were identified as noncubic (Ni,Cr)7Hf2 and (Ni,Cr)7(Hf,Zr)2, and face centered cubic (Ni,Cr)5Zr. The volume fraction of the reinforcing phases were about 0.5.
Cross-correlation least-squares reverse time migration in the pseudo-time domain
Li, Qingyang; Huang, Jianping; Li, Zhenchun
2017-08-01
The least-squares reverse time migration (LSRTM) method with higher image resolution and amplitude is becoming increasingly popular. However, the LSRTM is not widely used in field land data processing because of its sensitivity to the initial migration velocity model, large computational cost and mismatch of amplitudes between the synthetic and observed data. To overcome the shortcomings of the conventional LSRTM, we propose a cross-correlation least-squares reverse time migration algorithm in pseudo-time domain (PTCLSRTM). Our algorithm not only reduces the depth/velocity ambiguities, but also reduces the effect of velocity error on the imaging results. It relieves the accuracy requirements on the migration velocity model of least-squares migration (LSM). The pseudo-time domain algorithm eliminates the irregular wavelength sampling in the vertical direction, thus it can reduce the vertical grid points and memory requirements used during computation, which makes our method more computationally efficient than the standard implementation. Besides, for field data applications, matching the recorded amplitudes is a very difficult task because of the viscoelastic nature of the Earth and inaccuracies in the estimation of the source wavelet. To relax the requirement for strong amplitude matching of LSM, we extend the normalized cross-correlation objective function to the pseudo-time domain. Our method is only sensitive to the similarity between the predicted and the observed data. Numerical tests on synthetic and land field data confirm the effectiveness of our method and its adaptability for complex models.
3D digital image correlation using single color camera pseudo-stereo system
Li, Junrui; Dan, Xizuo; Xu, Wan; Wang, Yonghong; Yang, Guobiao; Yang, Lianxiang
2017-10-01
Three dimensional digital image correlation (3D-DIC) has been widely used by industry to measure the 3D contour and whole-field displacement/strain. In this paper, a novel single color camera 3D-DIC setup, using a reflection-based pseudo-stereo system, is proposed. Compared to the conventional single camera pseudo-stereo system, which splits the CCD sensor into two halves to capture the stereo views, the proposed system achieves both views using the whole CCD chip and without reducing the spatial resolution. In addition, similarly to the conventional 3D-DIC system, the center of the two views stands in the center of the CCD chip, which minimizes the image distortion relative to the conventional pseudo-stereo system. The two overlapped views in the CCD are separated by the color domain, and the standard 3D-DIC algorithm can be utilized directly to perform the evaluation. The system's principle and experimental setup are described in detail, and multiple tests are performed to validate the system.
Struma Ovarii Associated with Pseudo-Meigs’ Syndrome: A Rare Presentation of an Infrequent Tumor
Directory of Open Access Journals (Sweden)
Sonia Chhabra
2017-01-01
Full Text Available Struma ovarii is an uncommon highly specialized ovarian teratoma that accounts for less than 5% of mature teratomas. It is composed predominantly of mature thyroid tissue. Thyroid tissue is observed in 5%-15% of teratomas; however, to qualify as a struma ovarii tumor, the thyroid proportion must comprise more than 50% of the overall tissue. The combination of pseudo Meigs'syndrome and elevation of CA 125 with struma ovarii is a rare condition that can mimic ovarian malignancy. The majority of strumas are benign, however occasionally malignant transformation may be seen. We have reported a case of benign struma ovarii that presented with the clinical features of advanced ovarian carcinoma: complex pelvic mass, gross ascites, bilateral pleural effusion, and markedly elevated serum CA 125 levels. The patient underwent total abdominal hysterectomy and bilateral salpingo oophorectomy. Ascites and pleural effusion resolved completely, and the CA 125 levels have returned to normal following surgical excision. Patients with pseudo-Meigs’ syndrome may present a diagnostic problem as they masquerade as carcinoma with malignant effusions. In addition, the coexistence of struma ovarii and pseudo-Meigs’ syndrome is a very rare event. We emphasize by this report that, despite its rarity, a differential diagnosis of struma ovarii should be included for an ovarian mass.
Watery rot of pseudo-stem (Dickeya sp. management in banana (Musa sp. under greenhouse conditions
Directory of Open Access Journals (Sweden)
Joaquín Guillermo Ramírez
2014-12-01
Full Text Available This crop has serious constraints with diseases, including those caused by bacteria, such as Dickeya sp. This research aimed to evaluate the effect of 4 resistance inductors and 3 doses in Chlorine Dioxide in handling watery rot of pseudo-stem (Dickeya sp. in banana. Resistance inducers and their doses were Potassium Phosphite: 1.5 cm 3 .l -1 ; 3-Aminobutanoic Acid: 1.0 g.l -1 ; Methyl Jasmonate: 0.2 g.l -1 ; S-Methyl-Acibenzolar: 0.3 ml.l -1 , all by foliar application, while Chlorine Dioxide was injected into the pseudo-stem, in doses of 10, 20 and 30 mg.l -1 . The evaluated variables were: development of the disease, total biomass and quantification of the bacterium in the inoculated pseudo-stems. Applications of Chlorine Dioxide achieved a reduction of disease by 65.4, 91.99 and 61.5%, in addition to an inhibition of 100% of the pathogen, using 30 and 50 mg.l -1 doses. Meanwhile, the use of resistance inductors reduced up to 60.6% of the disease, but this effect failed to improve plant growth.
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Kavita R Bhatnagar
2014-01-01
Full Text Available Pseudo-Foster Kennedy Syndrome is described as unilateral optic disc swelling with contra lateral optic atrophy in the absence of an intracranial mass causing compression of the optic nerve. This occurs typically due to bilateral sequential optic neuritis or ischemic optic neuropathy. We describe a case of pseudo-Foster Kennedy Syndrome in a 37-year-old male with unilateral papilledema secondary to malignant hypertension and pre-existing ischemic optic neuropathy in other eye preventing transmission of raised intracranial pressure to the optic nerve. Hypertension and diabetes mellitus (DM play a significant role in pathogenesis of ischemic optic neuropathy. There is a greater correlation in patients with small disc and little to no cupping. The disorder commonly occurs in the 40-65 yrs age group. Our case is an example of Pseudo-Foster Kennedy syndrome where papilledema in one eye was associated with uncontrolled hypertension and disc pallor in fellow eye was secondary to ischemic optic neuropathy.
The role of doctor and patient in the construction of the pseudo-epileptic attack disorder.
Dekkers, W; van Domburg, P
2000-01-01
Periodic attacks of uncertain origin, where the clinical presentation resembles epilepsy but there is no evidence of a somatic disease, are called Pseudo-Epilepsy or Pseudo-Epileptic Attack Disorder (PEAD). PEAD may be called a 'non-disease', i.e. a disorder on the fringes of established disease patterns, because it lacks a rational pathophysiological explanation. The first aim of this article is to criticize the idea, common in medical science, that diseases are real entities which exist separately from the patient, waiting to be discovered by the doctor. We argue that doctor and patient construct a disease, and that the construction of the disease PEAD includes many normative evaluations. The second aim is to provide insight into the suffering of patients with PEAD. We focus on three aspects of the patient, identity, autonomy and responsibility. We present some characteristic descriptions of (pseudo-)epileptic attacks by Fjodor Dostoevsky, Gustave Flaubert and Thomas Mann. We argue that diagnosing PEAD reduces a meaningful life event into an insignificant, though intriguing, medical phenomenon, and that the patient will not benefit from being diagnosed as having PEAD.
Quaternion-based pseudo kalman filter for wearable inertial/magnetic sensor applications
Directory of Open Access Journals (Sweden)
Lee Jung Keun
2016-01-01
Full Text Available This paper deals with orientation estimation using miniature inertial/magnetic sensor comprised of a tri-axial rate gyro, a tri-axial accelerometer, and a tri-axial magnetometer. Particularly, a novel quaternion-based pseudo Kalman filter (KF is proposed by modifying an indirect KF, in order to maximize the computational efficiency and implementation simplicity. In the proposed pseudo KF, time-update process for prediction is based on the quaternion itself, while measurement-update process for correction is performed through the quaternion error. Experimental tests were conducted to verify performance of the proposed algorithm in various dynamic conditions. By designing the pseudo KF structure, matrix operations required in a typical KF are simplified. For instance, the proposed KF does not require the evaluation of the a priori and a posteriori error covariance matrices. Thus, the proposed algorithm achieves higher computational efficiency even than a typical indirect KF, without sacrificing estimation accuracy. Due to its high efficiency, the proposed algorithm can be suitable for battery-powered and low cost processor-based wearable inertial/magnetic sensor applications.
Shaul, Shelley; Arzouan, Yossi; Goldstein, Abraham
2012-06-01
In recent years many studies have focused on brain activity differences between fluent and dyslexic readers in order to understand the neural basis of dyslexia. The aim of the current study was to examine the processing of words and pseudo-words in the two hemispheres among dyslexic as compared to fluent readers, using behavioral, and electrophysiological source estimation measures. Two matched groups of university students, fluent and dyslexic readers, performed a lexical decision task in order to examine the processes of word recognition. Dyslexic readers showed overall less activity than fluent readers, mainly during late processing stages. In addition, the distinctive patterns of activity for words and pseudo-words displayed by fluent readers were not apparent in dyslexic readers. In particular, the increased activation of left-hemisphere language areas found in response to pseudo-words was absent in dyslexics. These findings are further evidence of orthographic and phonological impairments in dyslexia. Copyright © 2012 Elsevier B.V. All rights reserved.
Strain-Induced Pseudo--Magnetic Fields in Graphene: MegaGauss in Nanobubbles
Levy, Niv
2011-03-01
Recent theoretical proposals suggest that strain can be used to modify graphene electronic states through the creation of a pseudo--magnetic field. This effect is unique to graphene because of its massless Dirac fermion-like band structure and particular lattice symmetry (C3v). Scanning tunneling microscopy shows that graphene grown on a platinum (111) surface forms nanobubbles, which are highly strained due to thermal expansion mismatch between the film and the substrate. We find that scanning tunneling spectroscopy measurements of these nanobubbles exhibit Landau levels that form in the presence of strain-induced pseudo--magnetic fields greater than 300 Tesla. This demonstration of enormous pseudo--magnetic fields opens the door to both the study of charge carriers in previously inaccessible high magnetic field regimes and deliberate mechanical control over electronic structure in graphene or so-called ``strain engineering''. In collaboration with S. A. Burke ,2 , K. L. Meaker 2 , M. Panlasigui 2 , A. Zettl 2,3 , F. Guinea 4 , A. H. Castro Neto 5 and M. F. Crommie 2,3 . 1. Present address: Department of Physics and Astronomy and Department of Chemistry, University of British Columbia, Vancouver, BC V6T 121, Canada. 2. Department of Physics, University of California, Berkeley, CA 94720, USA. 3. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. 4. Instituto de Ciencia de Materiales de Madrid (CSIC), Madrid 28049, Spain. 5. Department of Physics, Boston University, Boston, MA 02215, USA.
Magnetic pseudo-fields in a rotating electron-nuclear spin system
Wood, A. A.; Lilette, E.; Fein, Y. Y.; Perunicic, V. S.; Hollenberg, L. C. L.; Scholten, R. E.; Martin, A. M.
2017-11-01
Analogous to the precession of a Foucault pendulum observed on the rotating Earth, a precessing spin observed in a rotating frame of reference appears frequency-shifted. This can be understood as arising from a magnetic pseudo-field in the rotating frame that nevertheless has physically significant consequences, such as the Barnett effect. To detect these pseudo-fields, a rotating-frame sensor is required. Here we use quantum sensors, nitrogen-vacancy (NV) centres, in a rapidly rotating diamond to detect pseudo-fields in the rotating frame. Whereas conventional magnetic fields induce precession at a rate proportional to the gyromagnetic ratio, rotation shifts the precession of all spins equally, and thus primarily affect 13C nuclear spins in the sample. We are thus able to explore these effects via quantum sensing in a rapidly rotating frame, and define a new approach to quantum control using rotationally induced nuclear spin-selective magnetic fields. This work provides an integral step towards realizing precision rotation sensing and quantum spin gyroscopes.
Directory of Open Access Journals (Sweden)
Emily K. Prince
2013-07-01
Full Text Available Because domoic acid, a neurotoxic secondary metabolite produced by marine diatoms in the genus Pseudo-nitzschia, is hypothesized to be part of a high affinity iron uptake system, we investigated whether domoic acid could improve the competitive ability of Pseudo-nitzschia delicatissima, and whether the availability of iron changed the outcome of competition experiments. We found that domoic acid had a slight negative effect on growth of the diatom Skeletonema marinoi when it was grown in monocultures. However, when S. marinoi was cultured with P. delicatissima the presence of domoic acid resulted in a reduction of S. marinoi cells by up to 38% and an increase in P. delicatissima cell numbers by up to 17% under iron replete conditions. Similar effects were not observed in low iron treatments. Domoic acid was not taken up by P. delicatissima cells. Overall, our results indicate that domoic acid can improve the competitive ability of Pseudo-nitzschia spp. and that iron is likely to be involved. This study provides an unusual example of indirect inhibition of competitor growth mediated by a secondary metabolite.
A Distributed Ledger for Supply Chain Physical Distribution Visibility
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Haoyan Wu
2017-11-01
Full Text Available Supply chains (SC span many geographies, modes and industries and involve several phases where data flows in both directions from suppliers, manufacturers, distributors, retailers, to customers. This data flow is necessary to support critical business decisions that may impact product cost and market share. Current SC information systems are unable to provide validated, pseudo real-time shipment tracking during the distribution phase. This information is available from a single source, often the carrier, and is shared with other stakeholders on an as-needed basis. This paper introduces an independent, crowd-validated, online shipment tracking framework that complements current enterprise-based SC management solutions. The proposed framework consists of a set of private distributed ledgers and a single blockchain public ledger. Each private ledger allows the private sharing of custody events among the trading partners in a given shipment. Privacy is necessary, for example, when trading high-end products or chemical and pharmaceutical products. The second type of ledger is a blockchain public ledger. It consists of the hash code of each private event in addition to monitoring events. The latter provide an independently validated immutable record of the pseudo real-time geolocation status of the shipment from a large number of sources using commuters-sourcing.
Approximate Solution of Schrödinger Equation with Pseudo-Gaussian Potential Viewed as a Perturbation
National Research Council Canada - National Science Library
Theodor-Felix Iacob; Marina Lute; Felix Iacob
2015-01-01
We consider the Schrödinger equation with pseudo-Gaussian potential and point out that it is basically made up by a term representing the harmonic oscillator potential and an additional term, which is actually a power...
Energy Technology Data Exchange (ETDEWEB)
Yashchuk, Valeriy V.; McKinney, Wayne R.; Takacs, Peter Z.
2008-05-19
We suggest and describe the use of a binary pseudo-random grating as a standard test surface for calibration of the modulation transfer function of microscopes. Results from calibration of a MicromapTM-570 interferometric microscope are presented.
Das, S.; Banu, A.S.; Jana, R.N.; Makinde, O.D.
2015-01-01
This paper is concerned with the entropy generation in a magnetohydrodynamic (MHD) pseudo-plastic nanofluid flow through a porous channel with convective heating. Three different types of nanoparticles, namely copper, aluminum oxide and titanium dioxide are considered with pseudo-plastic carboxymethyl cellulose (CMC)–water used as base fluids. The governing equations are solved numerically by shooting technique coupled with Runge–Kutta scheme. The effects of the pertinent parameters on the fl...
DEFF Research Database (Denmark)
Trainer, Vera; Wells, Mark L; Cochlan, William P
2009-01-01
concentrations of 43 nmol L-11, 4 nmol L-1, and 63 pg cell-1, respectively. This bloom co-dominated the phytoplankton assemblage with the euglenoid Eutreptiella sp. in the Juan de Fuca eddy region, a known initiation site for toxigenic Pseudo-nitzschia blooms. Two isolates of P. cuspidata collected during......, when considering only those stations where Pseudo-nitzschia was present, pDA was positively correlated with chlorophyll a and negatively correlated with temperature (p
Adnan, Ahmad; Idrees, Muhammad; Malik, Farnaz; Qureshi, Fahim Ashraf
2013-01-01
This work estimates the potential of banana pseudo-stem with high cellulosic content 42.2-63 %, for the production of fermentable sugars for lactic acid production through statistically optimized pretreatment method. To evaluate the catalyzed pretreatment efficiency of banana pseudo stem based on the enzymatic digestibility, Response Surface Methodology (RSM) was employed for the optimization of pretreatment temperature and time using lowest concentrations of H2SO4, NaOH, NaOH catalyzed Na2S ...
Influence of Sintering Time on the Structure Formation of Al-ZrW2O8 Pseudo Alloys
Shadrin, V. S.; Kulkov, S. N.
2017-02-01
Al - ZrW2O8 pseudo alloys were synthesized by free sintering of Al - ZrW2O8 powder mixture. Influence of sintering time on the structure formation of the pseudo alloys obtained was investigated. It has been shown that during sintering process zirconium tungstate decomposes into constituent oxides and re-synthesis of zirconium tungstate proceeds through intermediate stage - formation of WAl12 and ZrAl3 intermetallic compounds.
Kondo, Jiro; Westhof, Eric
2011-01-01
Nucleotide bases are recognized by amino acid residues in a variety of DNA/RNA binding and nucleotide binding proteins. In this study, a total of 446 crystal structures of nucleotide–protein complexes are analyzed manually and pseudo pairs together with single and bifurcated hydrogen bonds observed between bases and amino acids are classified and annotated. Only 5 of the 20 usual amino acid residues, Asn, Gln, Asp, Glu and Arg, are able to orient in a coplanar fashion in order to form pseudo pairs with nucleotide bases through two hydrogen bonds. The peptide backbone can also form pseudo pairs with nucleotide bases and presents a strong bias for binding to the adenine base. The Watson–Crick side of the nucleotide bases is the major interaction edge participating in such pseudo pairs. Pseudo pairs between the Watson–Crick edge of guanine and Asp are frequently observed. The Hoogsteen edge of the purine bases is a good discriminatory element in recognition of nucleotide bases by protein side chains through the pseudo pairing: the Hoogsteen edge of adenine is recognized by various amino acids while the Hoogsteen edge of guanine is only recognized by Arg. The sugar edge is rarely recognized by either the side-chain or peptide backbone of amino acid residues. PMID:21737431
Kondo, Jiro; Westhof, Eric
2011-10-01
Nucleotide bases are recognized by amino acid residues in a variety of DNA/RNA binding and nucleotide binding proteins. In this study, a total of 446 crystal structures of nucleotide-protein complexes are analyzed manually and pseudo pairs together with single and bifurcated hydrogen bonds observed between bases and amino acids are classified and annotated. Only 5 of the 20 usual amino acid residues, Asn, Gln, Asp, Glu and Arg, are able to orient in a coplanar fashion in order to form pseudo pairs with nucleotide bases through two hydrogen bonds. The peptide backbone can also form pseudo pairs with nucleotide bases and presents a strong bias for binding to the adenine base. The Watson-Crick side of the nucleotide bases is the major interaction edge participating in such pseudo pairs. Pseudo pairs between the Watson-Crick edge of guanine and Asp are frequently observed. The Hoogsteen edge of the purine bases is a good discriminatory element in recognition of nucleotide bases by protein side chains through the pseudo pairing: the Hoogsteen edge of adenine is recognized by various amino acids while the Hoogsteen edge of guanine is only recognized by Arg. The sugar edge is rarely recognized by either the side-chain or peptide backbone of amino acid residues.
Zou, Peng
2017-05-10
Staggering grid is a very effective way to reduce the Nyquist errors and to suppress the non-causal ringing artefacts in the pseudo-spectral solution of first-order elastic wave equations. However, the straightforward use of a staggered-grid pseudo-spectral method is problematic for simulating wave propagation when the anisotropy level is greater than orthorhombic or when the anisotropic symmetries are not aligned with the computational grids. Inspired by the idea of rotated staggered-grid finite-difference method, we propose a modified pseudo-spectral method for wave propagation in arbitrary anisotropic media. Compared with an existing remedy of staggered-grid pseudo-spectral method based on stiffness matrix decomposition and a possible alternative using the Lebedev grids, the rotated staggered-grid-based pseudo-spectral method possesses the best balance between the mitigation of artefacts and efficiency. A 2D example on a transversely isotropic model with tilted symmetry axis verifies its effectiveness to suppress the ringing artefacts. Two 3D examples of increasing anisotropy levels demonstrate that the rotated staggered-grid-based pseudo-spectral method can successfully simulate complex wavefields in such anisotropic formations.
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Azeddine Mjahad
2017-12-01
Full Text Available This work describes new techniques to improve VF detection and its separation from Ventricular Tachycarida (VT and other rhythms. It is based on time-frequency representation of the ECG and its use as input in an automatic classifier (K-nearest neighbours - KNN without any further signal parameter extraction or additional characteristics. For comparison purposes, three time-frequency variants are analysed: pseudo Wigner-Ville representation (RTF, grey-scale image obtained from RTF (IRTF, and reduced image from IRTF (reduced IRTF. Four types of rhythms (classes are defined: ’Normal’ for sinus rhythm, ’VT’ for ventricular tachycardia, ’VF’ for ventricular fibrillation and ’Others’ for the rest of rhythms. Classification results for VF detection in case of reduced IRTF are 88.27% sensitivity and 98.22% specificity. In case of VT, 88.31% sensitivity and 98.80% specificity is obtained, 98.14% sensitivity and 96.82% specificity for normal rhythms, and 96.91% sensitivity and 99.06% specificity for other rhythms. Finally, results are compared with other authors.
Directory of Open Access Journals (Sweden)
Bailing Liu
2015-01-01
Full Text Available Facility location, inventory control, and vehicle routes scheduling are three key issues to be settled in the design of logistics system for e-commerce. Due to the online shopping features of e-commerce, customer returns are becoming much more than traditional commerce. This paper studies a three-phase supply chain distribution system consisting of one supplier, a set of retailers, and a single type of product with continuous review (Q, r inventory policy. We formulate a stochastic location-inventory-routing problem (LIRP model with no quality defects returns. To solve the NP-hand problem, a pseudo-parallel genetic algorithm integrating simulated annealing (PPGASA is proposed. The computational results show that PPGASA outperforms GA on optimal solution, computing time, and computing stability.
Using ATTO dyes to probe bacterial interactions with the marine diatom Pseudo-nitzschia.
Mehic, S.; Sison-Mangus, M.
2016-02-01
Pseudo-nitzschia blooms are known to be highly toxic and detrimental to wildlife. The neurotoxin produced by the algae can ripple through the entire food web creating a direct impact on oceanic life and human-related industries. With coastal blooms increasing in both size and duration in recent years, it is crucial that we uncover more microbial interactions that may affect the toxicity of these blooms. Current harmful algal bloom studies have shown that different bacterial consortia can have a great impact Pseudo-nitzschia physiology. More specifically, research suggests that bacteria affect both growth rates and domoic acid concentrations of laboratory grown cultures. However, these studies do not explore the attachment patterns of these bacteria with the diatom. Bacterial attachment may dictate the different types of interactions between bacteria and the diatoms, a trait that is largely unexplored in the symbiotic interactions between the two organisms. In this study, we seek to identify direct and indirect interactions between four bacteria taxa from different phyla and three different species of Pseudo-nitzschia. Our preliminary scanning electron microscopy and DAPI staining experiments hint at distinct differences in attachment among bacterial taxa. To explore this work further, we aim to employ ATTO dyes and epifluorescent microscopy on both binary and multiple cultures to visualize patterns in attachment. By utilizing ATTO dyes with distinct wavelength emissions, we can perform a series experiment that highlights the interaction between bacteria and diatoms, without inserting a fluorescent reporter gene in the bacteria. Multiple cultures will be used to identify possible cooperative or negative interactive traits between bacteria that can affect diatom host physiology. Implications on both phytoplankton physiology and nutrient cycling will be subsequently discussed.
Koschate, J; Drescher, U; Thieschäfer, L; Heine, O; Baum, K; Hoffmann, U
2016-12-01
This study aims to compare cardiorespiratory kinetics as a response to a standardised work rate protocol with pseudo-random binary sequences between cycling and walking in young healthy subjects. Muscular and pulmonary oxygen uptake (V̇O2) kinetics as well as heart rate kinetics were expected to be similar for walking and cycling. Cardiac data and V̇O2 of 23 healthy young subjects were measured in response to pseudo-random binary sequences. Kinetics were assessed applying time series analysis. Higher maxima of cross-correlation functions between work rate and the respective parameter indicate faster kinetics responses. Muscular V̇O2 kinetics were estimated from heart rate and pulmonary V̇O2 using a circulatory model. Muscular (walking vs. cycling [mean±SD in arbitrary units]: 0.40±0.08 vs. 0.41±0.08) and pulmonary V̇O2 kinetics (0.35±0.06 vs. 0.35±0.06) were not different, although the time courses of the cross-correlation functions of pulmonary V̇O2 showed unexpected biphasic responses. Heart rate kinetics (0.50±0.14 vs. 0.40±0.14; P=0.017) was faster for walking. Regarding the biphasic cross-correlation functions of pulmonary V̇O2 during walking, the assessment of muscular V̇O2 kinetics via pseudo-random binary sequences requires a circulatory model to account for cardio-dynamic distortions. Faster heart rate kinetics for walking should be considered by comparing results from cycle and treadmill ergometry. © Georg Thieme Verlag KG Stuttgart · New York.
The gravitational wave stress–energy (pseudo)-tensor in modified gravity
Saffer, Alexander; Yunes, Nicolás; Yagi, Kent
2018-03-01
The recent detections of gravitational waves by the advanced LIGO and Virgo detectors open up new tests of modified gravity theories in the strong-field and dynamical, extreme gravity regime. Such tests rely sensitively on the phase evolution of the gravitational waves, which is controlled by the energy–momentum carried by such waves out of the system. We here study four different methods for finding the gravitational wave stress–energy pseudo-tensor in gravity theories with any combination of scalar, vector, or tensor degrees of freedom. These methods rely on the second variation of the action under short-wavelength averaging, the second perturbation of the field equations in the short-wavelength approximation, the construction of an energy complex leading to a Landau–Lifshitz tensor, and the use of Noether’s theorem in field theories about a flat background. We apply these methods in general relativity, Jordan–Fierz–Brans–Dicky theoy, and Einstein-Æther theory to find the gravitational wave stress–energy pseudo-tensor and calculate the rate at which energy and linear momentum is carried away from the system. The stress–energy tensor and the rate of linear momentum loss in Einstein-Æther theory are presented here for the first time. We find that all methods yield the same rate of energy loss, although the stress–energy pseudo-tensor can be functionally different. We also find that the Noether method yields a stress–energy tensor that is not symmetric or gauge-invariant, and symmetrization via the Belinfante procedure does not fix these problems because this procedure relies on Lorentz invariance, which is spontaneously broken in Einstein-Æther theory. The methods and results found here will be useful for the calculation of predictions in modified gravity theories that can then be contrasted with observations.
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Konno T
2017-11-01
Full Text Available Tomoyuki Konno,1 Yoichi Aota,2 Hiroshi Kuniya,1 Tomoyuki Saito,1 Ning Qu,3 Shogo Hayashi,3 Shinichi Kawata,3 Masahiro Itoh3 1Department of Orthopaedic Surgery, Yokohama City University Graduate School of Medicine, 2Department of Spine & Spinal Cord Surgery, Yokohama Brain and Spine Center, Yokohama, 3Department of Anatomy, Tokyo Medical University, Tokyo, Japan Objective: The superior cluneal nerve (SCN may become entrapped where it pierces the thoracolumbar fascia over the iliac crest; this can cause low back pain (LBP and referred pain radiating into the posterior thigh, calf, and occasionally the foot, producing the condition known as “pseudo-sciatica.” Because the SCN was thought to be a cutaneous branch of the lumbar dorsal rami, originating from the dorsal roots of L1–L3, previous anatomical studies failed to explain why SCN causes “pseudo-sciatica”. The purpose of the present anatomical study was to better elucidate the anatomy and improve the understanding of “pseudo-sciatica” from SCN entrapment. Materials and methods: SCN branches were dissected from their origin to termination in subcutaneous tissue in 16 cadavers (5 male and 11 female with a mean death age of 88 years (range 81–101 years. Special attention was paid to identify SCNs from their emergence from nerve roots and passage through the fascial attachment to the iliac crest. Results: Eighty-one SCN branches were identified originating from T12 to L5 nerve roots with 13 branches passing through the osteofibrous tunnel. These 13 branches originated from L3 (two sides, L4 (six sides, and L5 (five sides. Ten of the 13 branches showed macroscopic entrapment in the tunnel. Conclusion: The majority of SCNs at risk of nerve entrapment originated from the lower lumbar nerve. These anatomical results may explain why patients with SCN entrapment often evince leg pain or tingling that mimics sciatica. Keywords: superior cluneal nerve, entrapment neuropathy, dorsal rami
Rafael Perez Ribas; Ana Flávia Machado
2007-01-01
Although many studies have addressed poverty in Brazil, very few of them have analyzed the dynamic nature of this phenomenon. In order to fill this gap, this Working Paper seeks to identify the features that determine the permanence of poverty and the downward mobility into poverty of adults in urban areas. Due to the scarcity of Brazilian panel surveys, we use a ?pseudo-panel? obtained from PNAD, a cross-sectional National Household Survey. The probabilities of staying in states (poor or non...
Instrumental variable method for time-to-event data using a pseudo-observation approach.
Kjaersgaard, Maiken I S; Parner, Erik T
2016-06-01
Observational studies are often in peril of unmeasured confounding. Instrumental variable analysis is a method for controlling for unmeasured confounding. As yet, theory on instrumental variable analysis of censored time-to-event data is scarce. We propose a pseudo-observation approach to instrumental variable analysis of the survival function, the restricted mean, and the cumulative incidence function in competing risks with right-censored data using generalized method of moments estimation. For the purpose of illustrating our proposed method, we study antidepressant exposure in pregnancy and risk of autism spectrum disorder in offspring, and the performance of the method is assessed through simulation studies. © 2015, The International Biometric Society.
Pirro, Luca
2015-09-01
Recent experimental results have demonstrated the possibility of characterizing silicon-on-insulator (SOI) wafers through split C-V measurements in the pseudo-MOSFET configuration. This paper analyzes the capacitance and conductance versus frequency characteristics. We discuss the conditions under which it is possible to extract interface trap density in bare SOI wafers. The results indicate, through both measurements and simulations, that the signature due to interface trap density is present in small-area samples, but is masked by the RC response of the channel in regular, large-area ones, making the extraction in standard samples problematic. © 1963-2012 IEEE.
Efficient Boundary Extraction from Orthogonal Pseudo-Polytopes: An Approach Based on the D-EVM
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Ricardo Pérez-Aguila
2011-01-01
Full Text Available This work is devoted to contribute with two algorithms for performing, in an efficient way, connected components labeling and boundary extraction from orthogonal pseudo-polytopes. The proposals are specified in terms of the extreme vertices model in the -dimensional space (D-EVM. An overview of the model is presented, considering aspects such as its fundamentals and basic algorithms. The temporal efficiency of the two proposed algorithms is sustained in empirical way and by taking into account both lower dimensional cases (2D and 3D and higher-dimensional cases (4D and 5D.
[Atypical Lewy body disease revealed by burning mouth syndrome and a pseudo-psychiatric syndrome].
Varvat, J; Thomas-Anterion, C; Decousus, M; Perret-Liaudet, A; Laurent, B
2010-05-01
Among the degenerative diseases of the nervous system, Lewy body disease has the most psychiatric symptoms especially hallucinations, delusion and identification disorders. We report a case of Lewy body disease that started with a burning mouth syndrome for three year as the only symptom before the development of a pseudo-psychiatric syndrome (melancholy and Capgras). None of the usual cardinal criteria were present. MRI, cerebrospinal fluid, and DAT scan findings enabled the diagnosis. The dopaminergic hypothesis put forward in some cases of burning mouth syndrome might explain this symptom in Lewy body disease. Copyright 2009 Elsevier Masson SAS. All rights reserved.
Apparatus, Method, and Computer Program for a Resolution-Enhanced Pseudo-Noise Code Technique
Li, Steven X. (Inventor)
2015-01-01
An apparatus, method, and computer program for a resolution enhanced pseudo-noise coding technique for 3D imaging is provided. In one embodiment, a pattern generator may generate a plurality of unique patterns for a return to zero signal. A plurality of laser diodes may be configured such that each laser diode transmits the return to zero signal to an object. Each of the return to zero signal includes one unique pattern from the plurality of unique patterns to distinguish each of the transmitted return to zero signals from one another.
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Carlos Renato dos Reis Lemos
Full Text Available CONTEXT: Chronic idiopathic intestinal pseudo-obstruction is a very rare condition. CASE REPORT: This study describes a male patient who had presented obstructive symptoms for 24 years. He had been treated clinically and had undergone two previous operations in different services, with no clinical improvement or correct diagnosis. He was diagnosed with intestinal obstruction without mechanical factors in our service and underwent jejunostomy, which had a significant decompressive effect. The patient was able to gain weight and presented improvements in laboratory tests. Jejunostomy is a relatively simple surgical procedure that is considered palliative but, in this case, it was resolutive.
Anesthetic management of a pregnant patient with pseudo-pancreatic cyst for cysto-gastrostomy.
Shetti, Akshaya N; Dhulkhed, Vithal K; Gujarati, Amrish; Swetha, G S
2014-01-01
Non-obstetric diseases during pregnancy are not uncommon. The presence of systemic disease may further insult the pregnancy leading to alteration in the normal function of other system. Hence, it is important to treat the disease depending upon the severity and type of urgency. Several systemic diseases in pregnancy and management have been reported earlier but it is necessary to report a rare pathology, treatment option and its anesthetic management. We report anesthetic management of a rare case of pseudo pancreatic cyst in a pregnant lady operated for cysto-gastrostomy and also highlighting the recent guidelines for non-obstetric surgery in pregnancy.
Pseudo-random Aloha for inter-frame soft combining in RFID systems
DEFF Research Database (Denmark)
Castiglione, Paolo; Ricciato, Fabio; Popovski, Petar
2013-01-01
In this work we consider a recently proposed variant of the classical Framed Slotted-ALOHA where slot selection is based on a pseudo-random function of the message to be transmitted and of the frame index. We couple this feature with convolutional encoding, that allows to perform Inter-frame Soft...... cancellation (instead of combining). Numerical simulation results show that the ISoC scheme brings a noticeable throughput gain over traditional schemes in a dense RFID scenario with multiple concurrent Tag transmissions....
La Teología Mística de Pseudo Dionisio Areopagita: una nueva lectura
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Marcelo D. Boeri
2013-11-01
Full Text Available In this paper a new Spanish translation of the brief opuscule De mystica theologia (by the Christian Neoplatonic Pseudo Dyonisius Areopagita along with an introduction to the text are presented. The introduction focuses on the analysis of some points that are especially helpful to understand the text at issue: (i its history and its significance for the Neoplatonism and, more importantly, its relevance in terms of a highly original exposition of the Christian doctrine from a Neoplatonist viewpoint, (ii The importance of this text in Contemporary philosophy (Hegel, Heidegger, Wittgenstein is also noted and, finally, (iii its crucial significance for the so-called "negative theology".
REVELATION OF PSEUDO-MASK OF SPIRITUAL FIGURES IN RUTH PRAWER JHABVALA'S HEAT AND DUST
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Naveen K. MEHTA
2013-11-01
Full Text Available The spiritual figures of Ruth Prawer Jhabvala’s Heat and Dust appear to be very shallow and mendicants. They are poor Sadhus who move from place to place like vendors selling their gods. Though, they pretend to live in a world of spirituality but in reality their feelings and emotions are earthy. Even those who come from Europe as young men and initiated, do not live a sex-free life. At this backdrop, the present paper tries to explore the world of pseudo spiritual figures in Ruth Prawer Jhabvala's Heat and Dust.
Pseudo-random tool paths for CNC sub-aperture polishing and other applications.
Dunn, Christina R; Walker, David D
2008-11-10
In this paper we first contrast classical and CNC polishing techniques in regard to the repetitiveness of the machine motions. We then present a pseudo-random tool path for use with CNC sub-aperture polishing techniques and report polishing results from equivalent random and raster tool-paths. The random tool-path used - the unicursal random tool-path - employs a random seed to generate a pattern which never crosses itself. Because of this property, this tool-path is directly compatible with dwell time maps for corrective polishing. The tool-path can be used to polish any continuous area of any boundary shape, including surfaces with interior perforations.
A new spin-functional MOSFET based on magnetic tunnel junction technology: pseudo-spin-MOSFET
Shuto, Yusuke; Nakane, Ryosho; Wang, Wenhong; Sukegawa, Hiroaki; Yamamoto, Shuu'ichirou; Tanaka, Masaaki; Inomata, Koichiro; Sugahara, Satoshi
2009-01-01
We fabricated and characterized a new spin-functional MOSFET referred to as a pseudo-spin-MOSFET (PS-MOSFET). The PS-MOSFET is a circuit using an ordinary MOSFET and magnetic tunnel junction (MTJ) for reproducing functions of spin-transistors. Device integration techniques for a bottom gate MOSFET using a silicon-on-insulator (SOI) substrate and for an MTJ with a full-Heusler alloy electrode and MgO tunnel barrier were developed. The fabricated PS-MOSFET exhibited high and low transconductanc...
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Noémie Auclair-Ouellet
2014-04-01
The results of the word condition alone cannot rule out the possibility that errors in the svPPA group were caused by difficulty in understanding words rather than in processing derivational morphemes. However, the lexical context provided in this condition did not speed-up the performance of svPPA individuals as it did in the control group. Most importantly, results from the pseudo-word condition showed that in the svPPA group, the association between the morpheme and its meaning was not performed as readily and reliably as in the control group. These results support the involvement of semantic memory in morphological processing.
2008-09-01
of a given phase must interact ( Moho , 410, 660, etc.). We specify additional interfaces at levels within the Earth model that could potentially... Moho and other interfaces in the mantle down to, but not including, the 660-km discontinuity, thereby constraining the computed ray to bottom somewhere...REFLECTION M100 DIFFRACTION MOHO REFLECTION MOHO DIFFRACTION MOHO REFRACTION M150 REFRACTION M175 REFRACTION M200 REFRACTION M410 REFRACTION M660
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Jurandir Marcondes Ribas Filho
2009-06-01
Full Text Available RACIONAL: A síndrome de Ogilvie é condição clínica com sinais, sintomas e aparência radiológica de dilatação acentuada do cólon sem causa mecânica e pode complicar com rompimento da parede do cólon e sepse abdominal. O tratamento na maioria das vezes é cirúrgico. RELATO DO CASO: Paciente feminina, 49 anos, internada com queixa de dor abdominal e diarréia e apresentando-se confusa, desidratada, taquicárdica, dispnéica, temperatura de 38ºC, abdômen distendido, ausência de ruídos hidro-aéreos e toque retal com fezes pastosas. Estudo radiográfico mostrou padrão de pseudo-obstrução intestinal. A paciente evoluiu com parada de eliminação de gases e fezes e sinais de abdômen agudo infeccioso. Foi submetida à laparotomia com achado de ceco e transverso bastante dilatados e sem sinal de obstrução mecânica. Realizada colectomia subtotal com fechamento do coto distal e ileostomia terminal. CONCLUSÃO: Pensar nessa possibilidade diagnóstica e agir mais rapidamente é a única possibilidade de diminuir a morbimortalidade desses pacientes.BACKGROUND: The Ogilvie's Syndrome is a clinical condition with signals, symptoms and radiological appearance of large bowel swell without mechanical cause. This obstruction can complicate with disruption of the bowel and consequent evolution of abdominal sepse. The treatment is typically surgical. AIM: The aim of this work is report a case of Ogilvie's Syndrome. CASE REPORT: Feminine patient, 49 years-old, interned with a history of abdominal pain and diarrhea and presenting dehydratation, tachycardia , dyspnea, mental confusion, 38ºC of temperature, distended abdomen, absence of hydro-aerial noises and rectal touch with pasty excrements. The x-ray showed a standard of pseudo-intestinal obstruction. The patient evolved with stop of elimination of farts and excrements and signals of infectious acute abdomen. The laparotomy showed cecum and transverse very swelled without signal of
Pseudo-voluntary migration: the case of internal migration system in former Yugoslavia
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Damir Josipovič
2013-12-01
Full Text Available Migration theory has been dichotomised from several different analytical perspectives. The aim of this article is to view migration movements in a holistic scheme taking into account the geographical factors shaping migration patterns at both the point of origin and destination, rather than on the conceptualizations involving the built-in dualisms. The former Yugoslavia with its myriad of cases shows that migration has to be viewed without biased international or internal lenses. Furthermore, the author argues that the migration movements were instead part of a more or less organized system which tended to create circumstances, possibilities and/or impossibilities to migrate. In this way, instead of classifying migrations as either forced or voluntary, the concept of pseudo-voluntary migration movements was proposed. In changing the perspective in which migrations are view in this, the article draws extensively on the moorings theory developed by Bruce Moon. The author gives an updated framework for individual or small group migration analysis. The latter is supplemented by a set of variables and factors in order to make a further use possible at the level of international or internal migration. The author argues that the internal Yugoslav migration system between 1945 and 1991 should be viewed within a framework of potentially coerced, semi-coerced or ‘pseudo-voluntary migration’.
Pseudo-observations for "soft" bias correction aimed at multi-variable impact studies
Berg, Peter; Bosshard, Thoams; Yang, Wei
2017-04-01
Correcting biases in climate model simulations is likely to affect climate change signals, which is not necessarily justified. Observations have high uncertainty in themselves, and in the case of gridded observations they should be treated as models rather than an actual truth. One might, e.g., be better off by retaining small scale information from a climate model, rather than imposing that from interpolated gauge observations with some more or less sparse gauge network. For some variables, there are even too few gauges, such that a spatial grid is not supported. Keeping the model solution might then be a better approach than attempting to correct the climate model to spatially incorrect data. Here, we present a method for creating a pseudo-observational data set which retains small scale features from a core regional climate model simulation, while correcting larger scale features according to different gridded or purely gauge based data sets. Then, a set of regional climate projections are bias corrected toward the pseudo-observational data, and applied for an assessment of future fire risk for the forests of Sweden. The applied fire weather model takes daily precipitation and the 1200UTC value of temperature, wind and relative humidity, which makes it a sensitive system to different bias correction approaches.
Pseudo-hyperelastic model of tendon hysteresis from adaptive recruitment of collagen type I fibrils.
Ciarletta, Pasquale; Dario, Paolo; Micera, Silvestro
2008-02-01
Understanding the functional relationship between the viscoelasticity and the morphology of soft collagenous tissues is fundamental for many applications in bioengineering science. This work presents a pseudo-hyperelastic constitutive theory aiming at describing the time-dependant hysteretic response of tendons subjected to uniaxial tensile loads. A macroscopic tendon is modeled as a composite homogeneous tissue with the anisotropic reinforcement of collagen type I fibrils. The tissue microstructure is considered as an adaptive network of fibrillar units connected in temporary junctions. The processes of breakage and reformation of active fibrils are thermally activated, and are occurring at random times. An internal softening variable and a dissipation energy function account for the adaptive arrangement of the fibrillar network in the pseudo-hyperelastic model. Cyclic uniaxial tensile tests have been performed in vitro on porcine flexor digital tendons. The theoretical predictions fit accurately the experimental stress-strain data both for the loading and the unloading processes. The hysteresis behavior reflects the improvement in the efficiency and performance of the motion of the muscle-tendon unit at high strain rates. The results of the model demonstrate the microstructural importance of proteoglycans in determining the functional viscoelastic adaptability of the macroscopic tendon.
Evaluation of esophageal intramural pseudo-diverticulosis using high-resolution manometry.
Aimi, Masahito; Mikami, Hironobu; Izumi, Daisuke; Okimoto, Eiko; Tada, Yasumasa; Mishiro, Tsuyoshi; Ishimura, Norihisa; Ishihara, Shunji; Kinoshita, Yoshikazu
2016-10-01
Esophageal intramural pseudo-diverticulosis (EIPD) is a rare disease characterized by multiple small flask-shaped pouches in the esophageal wall, with the predominant symptom of chronic progressive or intermittent dysphagia. However, its etiology and pathogenesis remain unknown. We present a case of EIPD evaluated with high-resolution manometry in a 75-year-old man with food impaction after eating beef, who came to our emergency department. The patient experienced similar episodes three times previously, though the cause was unknown. Computed tomography (CT) findings revealed diffuse wall thickness in the upper intrathoracic esophagus, while esophagogastroduodenoscopy showed multiple small depressions and several white plaque patches, and a barium meal esophagogram showed characteristic multiple small outpouching areas. From these findings, we diagnosed the patient with EIPD. In addition, high-resolution manometry revealed strong contractions in the distal esophagus. We started an administration of isosorbide dinitrate, because abnormal esophageal motility may have been causative of the condition and development of pseudo-diverticulosis. Thereafter, the patient had a good clinical course without food impaction. Elevated intra-esophageal luminal pressure caused by abnormal esophageal motility seems to be an important factor in the pathogenesis of EIPD in some cases.
Transformation of mode-2 internal solitary wave over a pseudo slope-shelf
Cheng, Ming-Hung; Hsieh, Chih-Min; Hsu, John R.-C.; Hwang, Robert R.
2017-09-01
Numerical simulations are performed to investigate the effect of wave amplitude in a numerical wave tank on the evolution of a convex mode-2 internal solitary wave (ISW) propagating over a pseudo slope-shelf. A finite volume method based on a Cartesian grid system is adopted to solve the Navier-Stokes equations using Improved Delayed Detached Eddy Simulation model for the turbulent closure. Numerical results reveal three types of waveform during wave generation on the flat bottom: (1) pseudo vortex shedding in the case of very large initial amplitude; (2) PacMan phenomenon in large amplitude; and (3) smooth mode-2 ISW for small amplitude. During wave propagation on the plateau, the first type of waveform induces a quasi-elevated mode-1 ISW; the second generates chaotic internal waves with significant reduction in amplitude; while the third renders a slightly deformed mode-2 ISW across the plateau. Moreover, the decrease in the magnitude of leading trough is more intense than that in the leading crest due to strong wave-obstacle interaction in the case of very large initial wave amplitude.
Pyrolytic oil of banana (Musa spp.) pseudo-stem via fast process
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Abdullah, Nurhayati; Sulaiman, Fauziah; Taib, Rahmad Mohd [School of Physics, Universiti Sains Malaysia, 11800 USM Pulau Pinang (Malaysia); Miskam, Muhamad Azman [Science and Engineering Research Centre, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang (Malaysia)
2015-04-24
This study was an attempt to produce bio-oil from banana pseudo-stem, a waste of banana cultivation, using fast pyrolysis technology. The compositions were determined and the thermal degradation behaviour of the raw material was analyzed using Perkin-Elmer Simultaneous Thermal Analyzer (STA) 6000. A 300 g/h fluidized bed bench scale fast pyrolysis unit, assembled with double screw feeders and cyclones, operating at atmospheric pressure, was used to obtain the pyrolysis liquid. The study involves the impact of the following key variables; the reactor temperature in the range of 450–650 °C, and the residence time in the range of 1.00–3.00 s. The particle size was set at 224-400 µm. The properties of the liquid product were analyzed for calorific heating value, pH value, conductivity, water and char content. The basic functional groups of the compositions were also determined using FTIR. The properties of the liquid product were compared with other wood derived bio-oil. The pyrolysis liquids derived from banana pseudo-stem were found to be in an aqueous phase.