Hidden homogeneous extreme multistability of a fractional-order hyperchaotic discrete-time system: chaos, initial offset boosting, amplitude control, control, and synchronization

Fractional order maps are a hot research topic; many new mathematical models are suitable for developing new applications in different areas of science and engineering. In this paper, a new class of a 2D fractional hyperchaotic map is introduced using the Caputo-like difference operator. The hyperchaotic map has no equilibrium and lines of equilibrium points, depending on the values of the system parameters. All of the chaotic attractors generated by the proposed fractional map are hidden. The system dynamics are analyzed via bifurcation diagrams, Lyapunov exponents, and phase portraits for different values of the fractional order. The results show that the fractional map has rich dynamical behavior, including hidden homogeneous multistability and offset boosting. The paper also illustrates a novel theorem, which assures that two hyperchaotic fractional discrete systems achieve synchronized dynamics using very simple linear control laws. Finally, the chaotic dynamics of the proposed system are stabilized at the origin via a suitable controller

Experimental and Theoretical Investigation of Noise Effect in Centrifugal Fan Impeller

In this work a study was made in centrifugal fan blower to investigate the effect of impeller blade design on sound pressure level (SPL). Shroud and unshroud impeller of nine blades are used. The sound generation from flow inside the test rig at different positions was displayed by using spectral analyzer. The experiments were carried out in anechoic chamber with small holes in its walls, under ambient condition about (25-27) C ° to avoid the effect of temperature on the sound pressure level. The results showed that (SPL) decreased with the increase of distance from the source about (3-4)dB when distance varied about (0.8-1.06)m, and the (SPL) decreased with the decrease of velocity about (8-12)dB when velocity varied between (13000-2600) r.p.m., and when the velocity remain constant (SPL) increased with the increased of pressure about (7-15)dB when the pressure varied between (36-8)mbar. For the purpose of comparison, two types of impellers were tested under same conditions, the results showed that (SPL) increased when shroud used on the impeller. The mathematical results show good agreement with the experimental results. The study also concluded a spectral analysis of the noise generated using 1/3 octave band filter. The analysis showed that (SPL) increased with frequency range of (0.8-400) Hz. The maximum sound pressure level was appeared clearly in the frequency range between 200 – 400 Hz

Apport des SIG dans l’élaboration d’un plan d’aménagement anti-érosif : Cas du sous bassin de Bouguedfine (Zahrez Chlef, Algérie)

L’érosion des sols par la pluie et le ruissellement est un grave processus de dégradation du capital sol, entraînant un décapage de l’horizon superficiel, une baisse de son degré de fertilité et la détérioration des conditions de vie des paysans. L’aménagement des bassins versants est sans doute le moyen le plus efficace pour lutter contre ce phénomène. Le présent travail vise à démontrer l’intérêt que peut apporter un outil tel que le Système d’information Géographique (SIG) pour l’aménagement des bassins versants et à mettre en valeur les informations à caractère géographique déjà existantes, par la réalisation d’une carte globale de vulnérabilité du sous bassin versant de l’oued Bouguedfine au phénomène érosif en tenant compte les facteurs physico climatiques, responsables de l’érosion hydrique, tels que la pente, la pluviométrie, la lithologie, l’exposition des versants, l’occupation du sol ainsi que sa nature, en se basant sur l’analyse détaillée de la zone d’étude pour l’élaboration de la base de données. Les sites sensibles sont classés en 05 catégories, de la plus à la moins sensible, une stratégie d’intervention dans le sous bassin versant de l’oued Bouguedfine est contribuée (aménagement des cours d’eau et conservation des terrains en pente), en proposant un ensemble de techniques de protection. Mots-clés : Plan d’Aménagement de Protection,  SIG, érosion hydrique, Sous bassin de l’oued Bouguedfine, Algérie

Exploring the expectations, experiences and tensions of refugee patients and general practitioners in the quality of care in general practice.

BACKGROUND: Refugees and asylum seekers arrive in the Australian community with complex health needs and expectations of healthcare systems formed from elsewhere. Navigating the primary healthcare system can be challenging with communication and language barriers. In multicultural societies, this obstacle may be removed by accessing language-concordant care. Emerging evidence suggests language-concordance is associated with more positive reports of patient experience. Whether this is true for refugees and asylum seekers and their expectation of markers of quality patient-centred care (PCC) remains to be explored. This study aimed to explore the expectations around the markers of PCC and the impacts of having language-concordant care in Australian primary healthcare. METHODS: We conducted semi-structured individual in-language (Arabic, Dari, and Tamil) remote interviews with 22 refugee and asylum seekers and 9 general practitioners (GPs). Interview transcripts were coded inductively and deductively, based on the research questions, using Thematic Analysis. Extensive debriefing and discussion took place within the research team throughout data collection and analysis. RESULTS: Community member expectations of markers of PCC are constantly evolving and adapting based on invisible and visible actions during clinical encounters. Challenges can occur in the clinical encounter when expectations are 'unsaid' or unarticulated by both community members and GPs due to the assumption of shared understanding with language concordant care. Expectations of what constitutes satisfactory, quality PCC are dynamic outcomes, which are influenced by prior and current experiences of healthcare. CONCLUSION: This study highlights the importance of understanding that language concordant care does not always support aligned expectations of the markers of quality PCC between community members and their GP. We recommend that GPs encourage community members to provide explicit descriptions about how their prior experiences have framed their expectations of what characterizes quality PCC. In addition, GPs could develop a collaborative approach, in which they explain their own decision-making processes in providing PCC to refugees and asylum seekers. PATIENT OR PUBLIC CONTRIBUTION: Bilingual researchers from multicultural backgrounds and experience working with people from refugee backgrounds were consulted on study design and analysis. This study included individuals with lived experiences as refugees and asylum seekers and clinicians as participants

Inferring causal molecular networks: empirical assessment through a community-based effort

Inferring molecular networks is a central challenge in computational biology. However, it has remained unclear whether causal, rather than merely correlational, relationships can be effectively inferred in complex biological settings. Here we describe the HPN-DREAM network inference challenge that focused on learning causal influences in signaling networks. We used phosphoprotein data from cancer cell lines as well as in silico data from a nonlinear dynamical model. Using the phosphoprotein data, we scored more than 2,000 networks submitted by challenge participants. The networks spanned 32 biological contexts and were scored in terms of causal validity with respect to unseen interventional data. A number of approaches were effective and incorporating known biology was generally advantageous. Additional sub-challenges considered time-course prediction and visualization. Our results constitute the most comprehensive assessment of causal network inference in a mammalian setting carried out to date and suggest that learning causal relationships may be feasible in complex settings such as disease states. Furthermore, our scoring approach provides a practical way to empirically assess the causal validity of inferred molecular networks

Inferring causal molecular networks: empirical assessment through a community-based effort

It remains unclear whether causal, rather than merely correlational, relationships in molecular networks can be inferred in complex biological settings. Here we describe the HPN-DREAM network inference challenge, which focused on learning causal influences in signaling networks. We used phosphoprotein data from cancer cell lines as well as in silico data from a nonlinear dynamical model. Using the phosphoprotein data, we scored more than 2,000 networks submitted by challenge participants. The networks spanned 32 biological contexts and were scored in terms of causal validity with respect to unseen interventional data. A number of approaches were effective, and incorporating known biology was generally advantageous. Additional sub-challenges considered time-course prediction and visualization. Our results suggest that learning causal relationships may be feasible in complex settings such as disease states. Furthermore, our scoring approach provides a practical way to empirically assess inferred molecular networks in a causal sense

Characterization of greater middle eastern genetic variation for enhanced disease gene discovery

The Greater Middle East (GME) has been a central hub of human migration and population admixture. The tradition of consanguinity, variably practiced in the Persian Gulf region, North Africa, and Central Asia1-3, has resulted in an elevated burden of recessive disease4. Here we generated a whole-exome GME variome from 1,111 unrelated subjects. We detected substantial diversity and admixture in continental and subregional populations, corresponding to several ancient founder populations with little evidence of bottlenecks. Measured consanguinity rates were an order of magnitude above those in other sampled populations, and the GME population exhibited an increased burden of runs of homozygosity (ROHs) but showed no evidence for reduced burden of deleterious variation due to classically theorized ‘genetic purging’. Applying this database to unsolved recessive conditions in the GME population reduced the number of potential disease-causing variants by four- to sevenfold. These results show variegated genetic architecture in GME populations and support future human genetic discoveries in Mendelian and population genetics

Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at root s = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb(-1). The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t (t) over bar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95 confidence level for the product of the production cross section and branching fraction sigma(gg -> X) B(X -> HH -> b (b) over barb (b) over bar) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with amass scale Lambda(R) = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV