bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modeling Realized Volatility Dynamics with a Genetic Algorithm
Authors: Qu Hui , Ji Ping 
Published: January 2016

AbstractThe heterogeneous autoregressive model of realized volatility (HAR‐RV) is inspired by the heterogeneous market hypothesis and characterizes realized volatility dynamics through a linear function of lagged daily, weekly and monthly realized volatilities with a (1, 5, 22) lag structure. Considering that different markets can have different heterogeneous structures and a market's heterogeneous structure can vary over time, we build an adaptive heterogeneous autoregressive model of realized volatility (AHAR‐RV), whose lag structure is optimized with a genetic algorithm. Using nine common loss functions and the superior predictive ability test, we find that our AHAR‐RV model and its extensions provide significantly better out‐of‐sample volatility forecasts for the CSI 300 index than the corresponding HAR models. Furthermore, the AHAR‐RV model significantly outperforms all the other models under most loss functions. Besides, we confirm that Chinese stock markets' heterogeneous structure varies over time and the (1, 5, 22) lag structure is not the optimal choice. Copyright © 2016 John Wiley & Sons, Ltd.
Numerical Study of the Aerodynamic Response and Energy Harvesting of Polyvinylidene Fluoride Piezoelectric Flags in a Uniform Flow
Authors: Song Rujun , Shan Xiaobiao , Xie Tao 
Published: January 2016

AbstractThe kinetic energy of airflow is renewable and exists everywhere. It can drive the piezoelectric energy harvester to vibrate, which can convert energy of airflow into electricity. This paper presents the constructive vibration modes of multi‐piezoelectric flags (MPF) for energy harvesting in a uniform flow. The aerodynamic response and energy harvesting of both the single piezoelectric flag (SPF) and the MPF are investigated by a 2D‐numerical method. This method is fully coupled fluid‐structure‐electric (FSE) by using the immersed boundary‐lattice Boltzmann method, Euler‐Bernoulli beam and the piezoelectric theory. As an application, the dynamic characteristics of the SPF at a stable state are described. As for the MPF, vortices shedding from the piezoelectric flag effect the vibration of surrounding flags. In‐phase vibration modes of the MPF, as the constructive vibration modes for the energy harvesting, can be obtained in tandem and side‐by‐side patterns. The vibration characteristics of the MPF are effected by the streamwise and spanwise gap distances. Multi‐times electrical energy can be achieved using the MPF compared with the SPF alone in a uniform flow.
Prediction skill and predictability of Eurasian snow cover fraction in the NCEP Climate Forecast System version 2 reforecasts
Authors: He Qiong , Zuo Zhiyan , Zhang Renhe , Yang Song , Wang Wanqiu , Zhang Ruonan , Riddle Emily E. 
Published: January 2016

ABSTRACTEurasian snow cover fraction (SCF) prediction is analyzed using the recently developed National Centers for Environmental Prediction (NCEP) Climate Forecast System version 2 (CFSv2) monthly retrospective forecasts for 1983–2009. The CFSv2 is generally capable of reproducing the observed Eurasian SCF seasonal cycle and climatology. This study focuses on the prediction skill and predictability of Eurasian SCF in snowmelt and snowfall seasons because the intensive variability occurs in the two seasons. The CFSv2 reasonably predicts the interannual variations, long‐term trend and leading pattern in snowmelt season several months ahead. In comparison with the snowmelt season, the CFSv2 shows a better prediction skill in climatological values but a worse skill in the interannual variability in snowfall season. In addition, the forecasted downward trend of SCF in the snowfall season is opposite to that in the observation. The biases of Eurasian SCF in the snowmelt and snowfall seasons are significantly related with those of temperature and precipitation in the CFSv2. The forecasted cooler and wetter atmosphere is suggestive of the overestimation of the mean SCF. Meanwhile, the underestimation in the variability of both temperature and precipitation in the CFSv2 may be the important factor for the underestimated variability of SCF, especially for the damped variability of SCF in the snowfall season. Generally, the CFSv2 shows a higher and more stable prediction skill after late‐1990s than before in the two seasons. The change in the initial condition in the CFSv2 and the observed SCF in late‐1990s might be the plausible reason for it.
Main features of large‐scale oceanic‐atmospheric circulation related to strongest droughts during rainy season in Brazilian São Francisco River Basin
Authors: Paredes Trejo Franklin , Brito‐Castillo Luis , Barbosa Alves Humberto , Guevara Edilberto 
Published: January 2016

ABSTRACTSevere droughts have caused serious impact on water supply and agriculture in São Francisco River Basin (SFRB), Brazil, especially during the rainy season. Observational evidence suggests that droughts in this region could be driven by some large‐scale ocean‐atmospheric patterns. This study provides a general description of linkage between the ocean‐atmospheric circulation patterns and the droughts during the rainy season (November–December), in the SFRB's upper sub‐basins. The NCEP reanalysis I and monthly gridded precipitation dataset of the Global Precipitation Climatology Centre from 1948 to 2010 were used. SPI was used as drought index. All analyses were performed in a domain that covered South America and southern‐tropical portions of the Atlantic and Pacific Oceans. Both the wind speed and vertical velocity fields at 200 hPa and specific humidity at 700 hPa were analysed. Results indicate that more extensive short‐duration droughts are linked to: (1) El Niño conditions highly concentrated inside the Niño 3.4 region; (2) ITCZ with a northernmost‐than‐normal position; (3) weaker‐than‐normal convective activity over the SFRB coupled to a weaker‐than‐normal upper‐level westerly jet stream. For decadal scale, the atmospheric anomalies patterns are best correlated to long‐duration extensive droughts than the oceanic anomalies patterns (r = −0.84 and −0.14, respectively). This suggests that droughts in SFRB are strongly dependent on large‐scale moisture transport and upper‐level atmospheric circulation.
Generalized B‐bar: unlocking multiple compliance modes of finite elements with stiff‐fiber anisotropy
Authors: Oberrecht S. P. , Krysl P. 
Published: January 2016

SummaryElement locking is often seen in homogenized models of elastic fiber‐reinforced materials, and splitting the material compliance into two separate terms isolates troublesome strain modes. Once isolated, the locking modes can be addressed with tailored integration schemes or the opportune introduction of field variables. The canonical application of this approach is seen in the dilatational‐deviatoric split used to treat so‐called ‘volumetric locking’. In the present work, we invoke the spectral decomposition of the material compliance to provide a generalized split. Doing so naturally parses the response into six independent strain modes, with varying propensity for locking. This split can be used to generalize fundamental techniques, such as selective reduced integration and the B‐bar method. This broadened approach works to remedy locking suffered by lower order finite elements used to discretize troublesome materials. Applying these generalized methods to achieve the dilational‐deviatoric split is trivial. However, the compliance spectrum's ability to naturally isolate stiff material response modes makes it a uniquely valuable tool for use on homogenized anisotropic materials. Applying the split, defined by only the first compliance mode, has given rise to the generalized methods, which have proven effective in unlocking finite element models of anisotropic materials. In the present work, the generalization is broadened to treat more than one constrained mode. While treating six modes is equivalent to simple reduced integration techniques, up to five compliance modes are now separated for advantageous treatment. However, some attention must be paid to the stability of the resulting finite element stiffness matrices. We focus here on the treatment of two principal compliance modes. These ‘two‐mode’ applications of the generalized B‐bar method are shown to be a more robust default treatment of linear hexahedral elements than is provided by classical selective reduced integration. This is achieved with a negligible computational overhead. A framework for assessing element stability is delineated, and commonly arising instabilities are analyzed. Copyright © 2016 John Wiley & Sons, Ltd.
Value within otolaryngology: Assessment of the cost‐utility analysis literature
Authors: Patel Krupa R. , Phillips David J. , Leibowitz Jason M. , Scognamiglio Theresa , Banuchi Victoria E. , Kuhel William I. , Kutler David I. , Cohen Marc A. 
Published: January 2016

AbstractObjectiveTo assess the characteristics and quality of cost utility analyses (CUA) related to otolaryngology within the CEA registry and to summarize their collective results.MethodsAll cost‐utility analyses published between 1976 and 2011 contained in the Cost‐Effectiveness Analysis Registry (CEA Registry) were evaluated. Topics that fall within the care of an otolaryngologist were included in the review regardless of the presence of an otolaryngologist author. Potential associations between various study characteristics and CEA registry quality scores were evaluated using the Pearson product moment correlation coefficient.ResultsSixty‐one of 2913 (2.1%) total CUA publications screened were related to otolaryngology. Eighteen of 61 (29.5%) publications included an otolaryngologist as an author. Fourteen studies agreed on the cost effectiveness of at least unilateral cochlear implantation and six of seven (85.7%) studies demonstrated the cost effectiveness of continuous positive airway pressure (CPAP) for obstructive sleep apnea (OSA). Forty‐six percent (28 of 61) of all manuscripts were published between 2008 and 2011. A more recent publication year was associated with a higher CEA registry quality score while the presence of an otolaryngologist author and journal impact factor had no significant correlation with the quality of the CUA.ConclusionBased on current evidence in the CEA registry, unilateral cochlear implantation for hearing loss and CPAP for OSA are both cost‐effective therapeutic interventions. Although CUAs in otolaryngology have increased in quantity and improved in quality in more recent years, there is a relative lack of CUAs in otolaryngology in comparison to other subspecialties.
Modelling gravity currents without an energy closure
Authors: Konopliv N. A. , Llewellyn Smith Stefan G. , McElwaine J. N. , Meiburg E. 
Published: January 2016

We extend the vorticity-based modelling approach of Borden & Meiburg (Phys. Fluids, vol. 25 (10), 2013, 101301) to non-Boussinesq gravity currents and derive an analytical expression for the Froude number without the need for an energy closure or any assumptions about the pressure. The Froude-number expression we obtain reduces to the correct form in the Boussinesq limit and agrees closely with simulation data. Via detailed comparisons with simulation results, we furthermore assess the validity of three key assumptions underlying both our as well as earlier models: (i) steady-state flow in the moving reference frame; (ii) inviscid flow; and (iii) horizontal flow sufficiently far in front of and behind the current. The current approach does not require an assumption of zero velocity in the current.
Dietary intake and food contributors of polyphenols in adults and elderly adults of Sao Paulo: a population-based study
Authors: Miranda A. M. , Steluti J. , Fisberg R. M. , Marchioni D. M. 
Published: January 2016

AbstractA comprehensive estimation of polyphenol intake is needed to gain a better understanding of the association between polyphenol-rich food intake and the potential effects of this intake on chronic diseases. The aim of this study was to estimate the intake of polyphenols and the major dietary contributors in the population of Sao Paulo. Data were obtained from the Health Survey-São Paulo (ISA-Capital 2008) and were reported for 1103 adults and elderly adults. Food intake was estimated by one 24-h dietary recall (24HR). Polyphenol intake was calculated by matching food consumption data from the 24HR with the polyphenol content in foods listed in the Phenol-Explorer database. The mean total intake of polyphenols was 377·5 (se15·3) mg/d. The main polyphenol classes were phenolic acids (284·8 (se15·9) mg/d) and flavonoids (54·6 (se3·5) mg/d). Intakes were higher in the elderly adults than in other adults (P<0·001) and higher in individuals with lower educational level (P=0·01) and current smokers (P=0·02). The main dietary contributors for total polyphenols were coffee (70·5 %), citrus fruits (4·6 %) and tropical fruits (3·4 %). Coffee was the major source of polyphenols, providing 266·2 (se16·5) mg/d, and contributed 92·3 % of the phenolic acids and 93·1 % of the alkylmethoxyphenols. These findings will be useful for assessing the potential role on health of polyphenols and specific polyphenol-rich foods, such as coffee, and enable a comparison with people from other countries.
The Influence of Overseas Business Associations on Law-making in China: A Case Study
Authors: Hui Elaine Sio-ieng , Chan Chris King-chi 
Published: January 2016

AbstractThrough an investigation of the Shenzhen Collective Consultation Ordinance and the Guangdong Regulations on the Democratic Management of Enterprises, this article demonstrates how transnational capital in China deploys its associational power alongside its structural economic power to lobby and pressure the national and local governments to advance its own interests. In addition, building upon the ideas of Hall and Soskice about the varieties of capitalism, the authors have developed the concept of “varieties of transnational capital” to account for the differing positions of overseas business associations regarding the two laws. We find that these positions are shaped by two determining factors: a) where the associations are situated in global production chains, and b) the industrial relations model in their home countries.
Entre connecteur et modalisateur: à propos de quelques emplois de autant/façon de dire que
Authors: KUYUMCUYAN ANNIE 
Published: January 2016

RÉSUMÉAutant dire que établit une égalité de pertinence communicative entre deux énonciations. Peu usitée dans les systèmes comparatifs au sens strict, elle trouve son emploi dans des structures pseudo-paratactiques, entre deux énoncés. Précédé initialement d'un verbe modal, le marqueur fonctionne alors comme un connecteur destiné à articuler une relation discursive de « reformulation ». La « chute » du préfixe modal rend ce fonctionnement manifeste. Or une nouvelle variation semble intervenue récemment dans l'emploi de cette expression. Si ses emplois comme connecteur perdurent et semblent désormais stabilisés, ils semblent en effet marginalement céder devant un rôle de modalisateur.
Irradiation effects on antibody performance in the frame of biochip-based instruments development for space exploration
Authors: Baqué M. , Dobrijevic M. , Le Postollec A. , Moreau T. , Faye C. , Vigier F. , Incerti S. , Coussot G. , Caron J. , Vandenabeele-Trambouze O. 
Published: January 2016

AbstractSeveral instruments based on immunoassay techniques have been proposed for life-detection experiments in the framework of planetary exploration but few experiments have been conducted so far to test the resistance of antibodies against cosmic ray particles. We present several irradiation experiments carried out on both grafted and free antibodies for different types of incident particles (protons, neutrons, electrons and 12C) at different energies (between 9 MeV and 50 MeV) and different fluences. No loss of antibodies activity was detected for the whole set of experiments except when considering protons with energy between 20 and 30 MeV (on free and grafted antibodies) and fluences much greater than expected for a typical planetary mission to Mars for instance. Our results on grafted antibodies suggest that biochip-based instruments must be carefully designed according to the expected radiation environment for a given mission. In particular, a surface density of antibodies much larger than the expected proton fluence would prevent significant loss of antibodies activity and thus assuring a successful detection.
Modelling, simulation, and verification for detailed short‐circuit analysis of a 1 × 25 kV railway traction system
Authors: Chen Tsai‐Hsiang , Liao Rih‐Neng 
Published: January 2016

This study presents a modelling and simulation method for the analysis of short‐circuits in 1 × 25 kV railway traction systems (RTSs). First, the authors developed models of major components and a full‐scale model of a RTS. The component models developed in this study include a specific Le Blanc traction transformer and an overhead catenary system. The models are represented using corresponding coupling‐free equivalent circuits to facilitate implementation using software packages MATLAB®/Simulink®. The short‐circuit fault simulation of a RTS was conducted on a personal computer operating with MS Windows 7®. Field testing data was used to verify the simulation results. The modelling and simulation technology developed in this study provide a valuable reference for power engineers involved in the planning, design, and operation of a railway traction network.
Structural, linguistic and rhetorical features of the entrepreneurial pitch
Authors: Daly Peter , Davy Dennis 
Published: January 2016

Purpose– As mastering the two-minute entrepreneurial pitch is a key skill required of entrepreneurs and all those who have to sell an idea in a business context, the purpose of this paper is to analyse successful entrepreneurial pitches in order to provide practical pitch-related advice to entrepreneurs and to business school instructors developing pedagogical materials.Design/methodology/approach– As mastering the two-minute entrepreneurial pitch is a key skill required of entrepreneurs and all those who have to sell an idea in a business context, this paper aims to analyse successful entrepreneurial pitches in order to provide practical pitch-related advice to entrepreneurs and to business school instructors developing pedagogical materials.Findings– A ten-stage discourse framework was shown to underlie most pitches and typical linguistic exponents and rhetorical devices were identified. While there was a strong correlation between linguistic exponents and particular organisational stages, it was not possible to map the rhetorical strategies or tropes onto the organisational stages. The rhetorical framework provides a macro-structure to help entrepreneurs manipulate key content, whereas the linguistic framework highlights the salient grammatical, organisational, syntactic and lexical features of a successful pitch.Research limitation– The sample of entrepreneurial pitches analysed is too small to be totally representative of the entrepreneurial pitch in general. However, this in-depth multi-dimensional analysis provides initial research into the canonical features of the entrepreneurial pitch.Practical implication– This study provides an actionable, best practice, discoursal template for the entrepreneurial pitch together with the typical linguistic exponents and rhetorical features. The findings should sensitise entrepreneurs and instructors to salient macro- and micro-features of the entrepreneurial pitch.Originality value– To the authors’ knowledge, this is the first study that has been carried out that takes a multi-dimensional analysis approach (both rhetorical and linguistic/discourse analysis) to deconstruct the entrepreneurial pitch.
Social networks of Portuguese self-initiated expatriates
Authors: Pinto Luísa  Helena , Araújo Raquel Campos 
Published: January 2016

Purpose
– The purpose of this paper is to examine the social networks of Portuguese self-initiated expatriates (SIEs), in terms of composition, diversity and roles.

Methodology
– Semi-structured interviews with several Portuguese SIEs from diverse occupations and who were living and working in different locations were conducted, to explore the composition, diversity and roles performed by their social networks.

Findings
– The findings indicate that: first, surveyed Portuguese SIEs had both home and host social networks: while home networks fade over time, host networks were mainly work driven; second, most SIEs had an “anchor contact” prior to the relocation, which assisted in the decision to go abroad and the initial settlement; and third, surveyed Portuguese SIEs purposefully sough “fellow nationals” from a similar social status and background to get feedback and emotional support, while deliberately ignored Portuguese diaspora.

Originality/value
– Following the findings from this exploratory study, several research propositions are outlined highlighting the interactions between SIEs’ social networks at the destination and stereotypes toward their national origin. This study helps understand what shapes the formation of social networks among SIEs.
Haemophilia in a real‐world setting: the value of clinical experience in data collection
Authors: Dolan Gerry , Iorio Alfonso , Jokela Vuokko , Juusola Kristian , Lassila Riitta 
Published: January 2016

AbstractAt the 8th Annual Congress of the European Association for Haemophilia and Allied Disorders (EAHAD) held in Helsinki, Finland, in February 2015, Pfizer sponsored a satellite symposium entitled: ‘Haemophilia in a real‐world setting: The value of clinical experience in data collection’ Co‐chaired by Riitta Lassila (Helsinki University Central Hospital, Helsinki, Finland) and Gerry Dolan (Guy's and St Thomas’ Hospital, London, UK); the symposium provided an opportunity to explore the practical value of real‐world data in informing clinical decision‐making. Gerry Dolan provided an introduction to the symposium by describing what is meant by real‐world data (RWD), stressing the role RWD can play in optimising patient outcomes in haemophilia and highlighting the responsibility of all stakeholders to collaborate in continuous data collection. Kristian Juusola (Oulu University Hospital, Oulu, Finland) then provided personal experience as a haemophilia nurse around patient views on adherence to treatment regimes, and how collecting insights into real‐world use of treatment can shape approaches to improving adherence. The importance of elucidating pharmacokinetic parameters in a real‐world setting was then explored by Vuokko Jokela (Helsinki University, Helsinki, Finland). Finally, Alfonso Iorio (McMaster University, Hamilton, Ontario, Canada) highlighted the importance of quality data collection in translating clinical reality into scientific advances.