bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of effects of compressibility, geometric and flow parameters on the simulation of a synthetic jet behaviour
Authors: Bazdidi-Tehrani F. , Abouata A. , Hatami M. , Bohlooli N. 
Published: March 2016

ABSTRACTThe present paper focuses on a three-dimensional unsteady turbulent synthetic jet to assess the accuracy of a compressible simulation and some important parameters including the simulations of the actuator, cavity height and Reynolds number. The two-equationSST/k− ω turbulence model is used to predict the flow behaviour. Results show that the compressible simulation case is more accurate than the incompressible one and the dynamic mesh exhibits more reliable results than the mass flow inlet boundary in the compressible simulation. The compressible case displays a delay in the phase of instantaneous velocity for all three Reynolds numbers. Also, the maximum of mean velocity is less than the incompressible case. Moreover, an increase in the Reynolds number leads to an amplification of the peak of mean velocity magnitude. Finally, results demonstrate that a reduction in the cavity height regarding the compressible simulation case causes a reduction in the phase delay and rise in peak of instantaneous velocity magnitude.
An overview of flow control activities at Dassault Aviation over the last 25 years
Authors: Rosenblum J.-P. 
Published: March 2016

ABSTRACTIn France, the very first ideas on flow control were developed by Philippe Poisson-Quinton from the Office National d'Etudes et Recherches Aérospatiales (ONERA) in the 1950s. There was some renewal of this research topic in the early 1990s, first in the United States with scientists like Wygnanski and Gad-El Hak, and also in France at the initiative of Pierre Perrier from Dassault Aviation, who triggered a lot of research activities in this field both at ONERA and in the French National Centre for Scientific Research (CNRS) laboratories. The motivation was driven by the applications on Dassault Aviation military aircraft and Falcon business jets in order to contribute to the design, while facilitating performance optimisation and multi-disciplinary compromise. A few examples of flow control technologies, such as forebody vortex control, circulation control, flow separation control or boundary layer transition control using hybrid laminar flow control (HLFC), are presented to illustrate the applications and to explain the methodology used for the design of the flow control devices. The author also emphasises the current reaction of industry with respect to the integration of flow control technologies on an aircraft programme. The conclusion is related to the present status of the French research on this topic and to the next challenges to be addressed.
From “Occupy Central” to Democracy: Is a Referendum for Hong Kong Feasible and Desirable?
Authors: Lin Feng , Alati Daniel 
Published: March 2016

AbstractThis article seeks to utilize the existing literature on referendums to discuss the current situation in Hong Kong in order to make some theoretical and practical contributions to the field of constitutional studies. Theoretically, it attempts to situate and analyse Hong Kong’s current situation within Professor Tierney’s influential framework on constitutional referendums in order to further develop the constitutional theory in this area. Practically, it analyses, through comparative study, whether (and if so, how) referendums might provide a mechanism through which Hong Kong’s constitutional debate could productively move forward. It concludes by reiterating aspects of the Hong Kong experience that have aligned with, and further contributed to the constitutional theory on referendums and representative democracy. Moreover, it recommends that the Hong Kong Government begin consultations towards the tabling of legislation for a non-binding advisory referendum to be developed in accordance with the lessons learned from the jurisdictions discussed throughout the article.
Prototype Constitutional Supervision in China: The Lessons of the Hong Kong Basic Law Committee
Authors: IP Eric C. 
Published: March 2016

AbstractRecurrent proposals to establish a constitutional supervisory committee have been pertinaciously rejected in spite of widespread recognition of the Chinese Constitution’s ineffectiveness. And yet, the Hong Kong Basic Law Committee has long epitomized in practice a prototypic form of constitutional supervision. Vested with quasi-judicial competences, the Committee seemed destined for a central role under the “One Country, Two Systems” arrangement. The tight secrecy imposed on its proceedings and the suppression of its potential to act consistently and with a distinct identity have fatally undermined the Committee’s ability to modulate constitutional tensions by way of coordinating expectations of the Basic Law’s proper meaning. The experience of the Basic Law Committee reveals the recalcitrance of the Party-state toward constitutional interpretation by any specialized body, even one whose powers are heavily circumscribed and whose membership is tightly controlled.
Effects of side subsurface defects induced by CNC machine on the gain spatial distribution in neodymium phosphate glass
Authors: Wang Bingyan , Zhang Junyong , Shi Shuang , You Kewei , Zhu Jianqiang 
Published: March 2016

The processing method applied to the side surface is different from the method applied to the light pass surface in neodymium phosphate glass (Nd:glass), and thus subsurface defects remain after processing. The subsurface defects in the side surface influence the gain uniformity of Nd:glass, which is a key factor to evaluate the performance of amplifiers. The scattering characteristics of side subsurface defects were simulated by finite difference time domain (FDTD) Solutions software. The scattering powers of the glass fabricated by a computer numerical control (CNC) machine without cladding were tested at different incident angles. The trend of the curve was similar to the simulated result, while the smallest point was different with the complex true morphology. The simulation showed that the equivalent residual reflectivity of the cladding glass can be more than 0.1% when the number of defects in a single gridding is greater than 50.
Solute dispersion in pulsatile Casson fluid flow in a tube with wall absorption
Authors: Rana Jyotirmoy , Murthy P. V. S. N. 
Published: March 2016

The analysis of axial dispersion of solute is presented in a pulsatile flow of Casson fluid through a tube in the presence of interfacial mass transport due to irreversible first-order reaction catalysed by the tube wall. The theory of dispersion is studied by employing the generalized dispersion model proposed by Sankarasubramanian & Gill (Proc. R. Soc. Lond. A, vol. 333 (1592), 1973, pp. 115–132). This dispersion model describes the whole dispersion process in terms of three effective transport coefficients, i.e. exchange, convection and dispersion coefficients. In the present study, the effects of yield stress of Casson fluid ${\it\tau}_{y}$, wall absorption parameter ${\it\beta}$, amplitude of fluctuating pressure component $e$ and Womersley frequency parameter ${\it\alpha}$ on the dispersion process are discussed under the influence of pulsatile pressure gradient. In a pulsatile flow, the plug flow radius changes during the period of oscillation and it has an effect on the dispersion process. Even with the Casson fluid model also, in an oscillatory flow, for small values of ${\it\alpha}$, the dispersion coefficient $K_{2}$ is positive, but when the value of ${\it\alpha}$ is as large as 3, $K_{2}$ takes both positive and negative values due to the fluctuations in the velocity profiles. This nature becomes more predominant for ${\it\tau}_{y}$, $e$ and ${\it\beta}$. It is observed that initially, for small time, the amplitude and magnitude of fluctuations of $K_{2}$ becomes more rapid and increases with time but it decreases after certain time and reaches a non-transient state for large time. Like in the case of Newtonian model, double frequency period for $K_{2}$ is observed at small time for large values of ${\it\alpha}$ with the Casson model for blood. It is seen that critical time for which $K_{2}$ reaches a non-transient state is independent of ${\it\tau}_{y}$ and $e$ but is dependent on ${\it\alpha}$. It is also observed that the axial distribution of mean concentration $C_{m}$ of solute depends on ${\it\tau}_{y}$ and ${\it\beta}$. But the effect of $e$ and ${\it\alpha}$ on $C_{m}$ is not very significant. This dispersion model in non-Newtonian pulsatile flow can be applied to study the dispersion process in the cardiovascular system and blood oxygenators.
On turbulent particle fountains
Authors: Mingotti Nicola , Woods Andrew W. 
Published: March 2016

We describe new experiments in which particle-laden turbulent fountains with source Froude numbers $20>Fr_{0}>6$ are produced when particle-laden fresh water is injected upwards into a reservoir filled with fresh water. We find that the ratio $U$ of the particle fall speed to the characteristic speed of the fountain determines whether the flow is analogous to a single-phase fountain ($U\ll 1$) or becomes a fully separated flow ($U\geqslant 1$). In the single-phase limit, a fountain with momentum flux $M$ and buoyancy flux $B$ oscillates about the mean height, $h_{m}=(1.56\pm 0.04)M^{3/4}B^{-1/2}$, as fluid periodically cascades from the maximum height, $h_{t}=h_{m}+{\rm\Delta}h$, to the base of the tank. Experimental measurements of the speed $u$ and radius $r$ of the fountain at the mean height $h_{m}$, combined with the conservation of buoyancy, suggest that $Fr(h_{m})=u(g^{\prime }r)^{-1/2}\approx 1$. Using these values, we find that the classical scaling for the frequency of the oscillations, ${\it\omega}\sim BM^{-1}$, is equivalent to the scaling $u(h_{m})/r(h_{m})$ for a fountain supplied at $z=h_{m}$ with $Fr=1$ (Burridge & Hunt, J. Fluid Mech., vol. 728, 2013, pp. 91–119). This suggests that the oscillations are controlled in the upper part of the fountain where $Fr\leqslant 1$, and that they may be understood in terms of a balance between the upward supply of a growing dense particle cloud, at the height where $Fr=1$, and the downward flow of this cloud. In contrast, in the separated flow regime, we find that particles do not reach the height at which $Fr=1$: instead, they are transported to the level at which the upward speed of the fountain fluid equals their fall speed. The particles then continuously sediment while the particle-free fountain fluid continues to rise slowly above the height of particle fallout, carried by its momentum.
Transcultural Aesthetics and Postcolonial Memory: the Practices and Politics of Remembering in Tan Twan Eng’sThe Garden of Evening Mists
Authors: Poon Angelia 
Published: March 2016

AbstractThe tension between the use of postcolonial memory to bear witness to the past and the aestheticization of memory lies at the center of Malaysian-born writer Tan Twan Eng’s second novel,The Garden of Evening Mists(2012), a work that features the Japanese occupation of Malaya during World War II and the postwar period of the Malayan Emergency. The main protagonist is a former judge named Yun Ling who, faced with the prospect of eventual memory and speech loss, is moved to record her past experiences including the time she was a prisoner of war interred and when she was an apprentice to the gardener, Aritomo. In this article, I examine the novel’s self-conscious musings about the nature of memory and the ways in which memory may be represented and preserved. Tan’s novel attempts to provide a meditation on the transcultural mediation and aestheticization of memory by deliberately intermingling and overlaying various cultural features, artistic traditions and ethno-cultural subjectivities when it comes to processes of remembering. The attempt to transculturally aestheticize memory is on one level a metafictional and ostensibly inclusive move to affirm the plurality of stories and multiple perspectives. Yet, this is undermined by the novel’s very strategies of aestheticization, which run the risk of making memory an artistic object so “precious” and rarefied as to counter the more avowedly political function of memory—that of bearing witness to history.
Flashes of Trading Intent at NASDAQ
Authors: Skjeltorp Johannes A. , Sojli Elvira , Tham Wing Wah 
Published: March 2016

AbstractWe use the introduction and subsequent removal of the flash-order functionality from NASDAQ as a natural experiment to investigate the impact of voluntary disclosure of trading intent on market quality. We find that flash orders significantly improve liquidity in NASDAQ. Furthermore, overall market quality improves (deteriorates) when flash functionality is introduced (removed). This result can be attributed to increased competition among liquidity suppliers across competing trading venues. Alternatively, flash orders attract responses from reactive traders immediately after the announcement, attracting more “hidden liquidity” and lowering risk-bearing costs for the overall market.
Implicit role of Cairns distributed ions and weak relativistic effects of electrons in the formation of dust acoustic waves in plasma
Authors: Kalita Bhaben Chandra , Kalita Rekha 
Published: March 2016

In this model of a dusty plasma, we have investigated dust acoustic waves consisting of electrons with weak relativistic effects, Cairns distributed cold ions and negatively charged mobile dust. Dust acoustic (DA) compressive and rarefactive solitons of various amplitudes are established. The parameter ${\it\beta}$ involved in Cairns distribution is related to the non-thermal parameter ${\it\alpha}$. However, the increase of ${\it\beta}$, which is independent of temperature, becomes instrumental for complete linear increase or decrease of the amplitudes of both the compressive and rarefactive relativistic solitons. Hence it is worthwhile to note that the increase of ${\it\beta}$ is solely due to the rest energy and not due to kinetic energy in this relativistic plasma. This is one of the most significant results of our investigation. Also, the flux of negative charges from the dust particles, together with the effect of the relativistic electrons, appears to balance the positive charges of Cairns distributed ions for nearly constant growth of amplitudes.
Understanding habitat selection of the Vulnerable wild yak Bos mutus on the Tibetan Plateau
Authors: Liang Xuchang , Kang Aili , Pettorelli Nathalie 
Published: March 2016

AbstractWe tested a series of hypotheses on drivers of habitat selection by the Vulnerable wild yak Bos mutus, combining distribution-wide sighting data with species distribution modelling approaches. The results indicate that climatic conditions are of paramount importance in shaping the wild yak's distribution on the Tibetan Plateau. Habitat selection patterns were seasonal, with yaks appearing to select areas closer to villages during the vegetation-growing season. Unexpectedly, our index of forage quantity had a limited effect in determining the distribution of the species. Overall, our results suggest that expected changes in climate for this region could have a significant impact on habitat availability for wild yaks, and we call for more attention to be focused on the unique wildlife in this ecosystem.
The influence of risk factors associated with captive rearing on post-release survival in translocated cirl buntings Emberiza cirlus in the UK
Authors: Fountain K. , Jeffs C. , Croft S. , Gregson J. , Lister J. , Evans A. , Carter I. , Chang Y. M. , Sainsbury A. W. 
Published: March 2016

AbstractPopulation decline resulting from agricultural intensification led to contraction of the range of the cirl bunting Emberiza cirlus in the UK to a small area of south Devon. As part of the UK Biodiversity Action Plan for the species, a project to re-establish a population in suitable habitat in Cornwall was undertaken during 2006–2011, in which chicks were removed from the nest in Devon, hand-reared and then delayed-released. The survival of the birds to four time points in the year after release was analysed in relation to the effect of rearing factors, using a multivariable logistic regression model. Individuals with higher body weight at capture were more likely to survive to 1 January and 1 May in the year following release, and individuals released in June and July were more likely to survive than those released in August. Individuals released in 2006 and 2011 had a higher survival rate than those released during 2007–2010. Timing of capture, time spent at each stage in captivity, medication and the detection of parasites in the brood had no significant effect. Immunosuppressive disease, weather factors and predator activity may have led to some of the observed differences in survival. This analysis provides evidence with which to plan future translocation projects for cirl buntings and other passerine birds.
Hybrid intensity-modulated radiation therapy (IMRT) simultaneous integrated boost (SIB) technique versus three-dimensional (3D) conformal radiotherapy with SIB for breast radiotherapy: a planning comparison
Authors: Smith Shayne K. , Estoesta Reuben P. , Kader Jaraad A. , Martin Darren , Claridge-Mackonis Elizabeth R. , Toohey Joanne M. , Carroll Susan L. 
Published: March 2016

AbstractAimThis study aims to compare conventional simultaneous integrated boost (SIB) planning technique with a hybrid SIB intensity-modulated radiation therapy (IMRT) technique with varying open tangent to IMRT field dose ratios. Furthermore, we investigated which of the dose ratios proves the most favourable as a class solution across a sample.MethodsIn total, 15 patients with conventional SIB treatment plans were re-planned with hybrid SIB IMRT technique using three differing open field:IMRT dose ratios, that is, 80:20, 70:30 and 60:40. Plans were compared using dosimetric comparison of organs at risk (OARs) and homogeneity and conformity indexes across target structures.ResultsAll hybrid plans reduced dose maximums and showed a reduction of high doses to both lungs but increased lower doses, that is, V5, with similar results discovered for the heart. Contralateral breast dose was shown to decrease V5 and V1 measures by hybrid arms, whereas increasing the V2. Left anterior descending artery dose and non-irradiated structures were reduced by all hybrid arms. The homogeneity and conformity increased across all hybrid arms. Qualitative assessment of all plans also favoured hybrid plans.FindingsHybrid plans produced superior dose conformity, homogeneity, reduced dose maximums and showed an improvement in most OAR parameters. The 70:30 hybrid technique exhibited greater benefits as a class solution to the sample than conventional plans due to superior dose conformity and homogeneity to target volumes.
Application of Transcranial Electric Stimulation (tDCS, tACS,	tRNS)
Authors: Paulus Walter , Nitsche Michael A. , Antal Andrea 
Published: March 2016

Abstract. Low-intensity transcranial electrical stimulation (tES) techniques are a group of noninvasive brain stimulation approaches, where currents are applied with intensities ranging between 0.4 and 2 mA through the human scalp. The most frequently used tES methods are transcranial direct current (tDCS), alternating current (tACS), and random noise stimulation (tRNS). These methods have been shown to induce changes in cortical excitability and activity during and after the stimulation in a reversible manner. It was observed that while anodal and cathodal tDCS acts on the membrane potentials by depolarizing or hyperpolarizing them, tACS probably modifies cortical oscillations. tRNS, that is a special form of tACS, might act through affecting the signal-to-noise ratio in the brain. Currently, an exponentially increasing number of studies have been published regarding the effects of tES on physiological processes and cognition. The aim of this review is to summarize the basic aspects of tES methods.
Water electrolysis on La1−xSrxCoO3−δ perovskite electrocatalysts
Authors: Mefford J. Tyler , Rong Xi , Abakumov Artem M. , Hardin William G. , Dai Sheng , Kolpak Alexie M. , Johnston Keith P. , Stevenson Keith J. 
Published: March 2016

AbstractPerovskite oxides are attractive candidates as catalysts for the electrolysis of water in alkaline energy storage and conversion systems. However, the rational design of active catalysts has been hampered by the lack of understanding of the mechanism of water electrolysis on perovskite surfaces. Key parameters that have been overlooked include the role of oxygen vacancies, B–O bond covalency, and redox activity of lattice oxygen species. Here we present a series of cobaltite perovskites where the covalency of the Co–O bond and the concentration of oxygen vacancies are controlled through Sr2+ substitution into La1−xSrxCoO3−δ. We attempt to rationalize the high activities of La1−xSrxCoO3−δ through the electronic structure and participation of lattice oxygen in the mechanism of water electrolysis as revealed through ab initio modelling. Using this approach, we report a material, SrCoO2.7, with a high, room temperature-specific activity and mass activity towards alkaline water electrolysis.
Rotational manipulation of single cells and organisms using acoustic waves
Authors: Ahmed Daniel , Ozcelik Adem , Bojanala Nagagireesh , Nama Nitesh , Upadhyay Awani , Chen Yuchao , Hanna-Rose Wendy , Huang Tony Jun 
Published: March 2016

AbstractThe precise rotational manipulation of single cells or organisms is invaluable to many applications in biology, chemistry, physics and medicine. In this article, we describe an acoustic-based, on-chip manipulation method that can rotate single microparticles, cells and organisms. To achieve this, we trapped microbubbles within predefined sidewall microcavities inside a microchannel. In an acoustic field, trapped microbubbles were driven into oscillatory motion generating steady microvortices which were utilized to precisely rotate colloids, cells and entire organisms (that is, C. elegans). We have tested the capabilities of our method by analysing reproductive system pathologies and nervous system morphology in C. elegans. Using our device, we revealed the underlying abnormal cell fusion causing defective vulval morphology in mutant worms. Our acoustofluidic rotational manipulation (ARM) technique is an easy-to-use, compact, and biocompatible method, permitting rotation regardless of optical, magnetic or electrical properties of the sample under investigation.
Imaging multicellular specimens with real-time optimized tiling light-sheet selective plane illumination microscopy
Authors: Fu Qinyi , Martin Benjamin L. , Matus David Q. , Gao Liang 
Published: March 2016

AbstractDespite the progress made in selective plane illumination microscopy, high-resolution 3D live imaging of multicellular specimens remains challenging. Tiling light-sheet selective plane illumination microscopy (TLS-SPIM) with real-time light-sheet optimization was developed to respond to the challenge. It improves the 3D imaging ability of SPIM in resolving complex structures and optimizes SPIM live imaging performance by using a real-time adjustable tiling light sheet and creating a flexible compromise between spatial and temporal resolution. We demonstrate the 3D live imaging ability of TLS-SPIM by imaging cellular and subcellular behaviours in live C. elegans and zebrafish embryos, and show how TLS-SPIM can facilitate cell biology research in multicellular specimens by studying left-right symmetry breaking behaviour of C. elegans embryos.