bluuebunny/crossref_metadata_2025_split huggingface dataset:
Equilibrium and kinetic Si isotope fractionation factors and their implications for Si isotope distributions in the Earth’s surface environments
Authors: He Hong-tao , Zhang Siting , Zhu Chen , Liu Yun 
Published: January 2016

Abstract
Several important equilibrium Si isotope fractionation factors among minerals, organic molecules and the H4SiO4 solution are complemented to facilitate the explanation of the distributions of Si isotopes in Earth’s surface environments. The results reveal that, in comparison to aqueous H4SiO4, heavy Si isotopes will be significantly enriched in secondary silicate minerals. On the contrary, quadra-coordinated organosilicon complexes are enriched in light silicon isotope relative to the solution. The extent of 28Si-enrichment in hyper-coordinated organosilicon complexes was found to be the largest. In addition, the large kinetic isotope effect associated with the polymerization of monosilicic acid and dimer was calculated, and the results support the previous statement that highly 28Si-enrichment in the formation of amorphous quartz precursor contributes to the discrepancy between theoretical calculations and field observations. With the equilibrium Si isotope fractionation factors provided here, Si isotope distributions in many of Earth’s surface systems can be explained. For example, the change of bulk soil δ30Si can be predicted as a concave pattern with respect to the weathering degree, with the minimum value where allophane completely dissolves and the total amount of sesqui-oxides and poorly crystalline minerals reaches their maximum. When, under equilibrium conditions, the well-crystallized clays start to precipitate from the pore solutions, the bulk soil δ30Si will increase again and reach a constant value. Similarly, the precipitation of crystalline smectite and the dissolution of poorly crystalline kaolinite may explain the δ30Si variations in the ground water profile. The equilibrium Si isotope fractionations among the quadra-coordinated organosilicon complexes and the H4SiO4 solution may also shed light on the Si isotope distributions in the Si-accumulating plants.
Foreign body injuries in children
Authors: Jariwala Neha , Kratimenos Panagiotis , Eng David , Gaughan John , Koutroulis Ioannis 
Published: January 2016

Background and objectives:
Foreign body injury (FBI) is a considerable public health issue for children. Although the relationships of FBI with age, gender, and objects of injury have been studied, the extent to which other demographic factors influence FBI is unclear. We hypothesized that the risk for FBI increases with the number of children in the house-hold.

Design and settings:
This was a retrospective analysis of 223 patients aged 2—10 years who presented to the emergency department of an inner-city pediatric hospital and who were found to have FBI.

Patients and methods:
The guardians were contacted via phone to examine the associations of FBI with income, parental educational level, number of children in the household, and birth order while controlling with a matched population of 250 patients. Statistical analyses using frequencies and univariate and multivariate analyses were performed.

Results:
For each increase in the number of children, the risk of FBI increased 1.44-fold (OR = 1.442). With each increase in the number of caregivers, the risk of a FBI decreased 33% (OR = 0.673). With each increase in income category, the risk of a FBI decreased 59% (OR = 0.413).

Conclusion:
The results suggest that an increase in the number of children in a household is associated with a greater risk of FBI.
Molecular pathogenesis of long QT syndrome type 1
Authors: Wu Jie , Ding Wei‐Guang , Horie Minoru 
Published: January 2016

AbstractLong QT syndrome type 1 (LQT1) is a subtype of a congenital cardiac syndrome caused by mutation in the KCNQ1 gene, which encodes the α‐subunit of the slow component of delayed rectifier K+ current (IKs) channel. Arrhythmias in LQT1 are characterized by prolongation of the QT interval on ECG, as well as the occurrence of life‐threatening cardiac events, frequently triggered by adrenergic stimuli (e.g., physical or emotional stress). During the past two decades, much advancement has been made in understanding the molecular pathogenesis underlying LQT1. Uncovering the genotype‐phenotype correlations in LQT1 is of clinical importance to better understand the gene‐specific differences that may influence the propensity for developing life‐threatening arrhythmias under specific conditions. Elucidation of these mechanisms will also help to improve the diagnosis and management of this cardiac disorder based on gene‐specific considerations. This review describes the current medical consensus and recent developments regarding the molecular pathogenesis of LQT1 and provides a novel insight into the adrenergic regulation of this disease.
CORRELATIONS BETWEEN INSURANCE LINES OF BUSINESS: AN ILLUSION OR A REAL PHENOMENON? SOME METHODOLOGICAL CONSIDERATIONS
Authors: Avanzi Benjamin , Taylor Greg , Wong Bernard 
Published: January 2016

AbstractThis paper is concerned with dependency between business segments in the non-life insurance industry. When considering the business of an insurance company at the aggregate level, dependence structures can have a major impact in several areas of Enterprise Risk Management, such as in claims reserving and capital modelling. The accurate estimation of the diversification benefits related to the dependence structures between lines of business (LoBs) is crucial for (i) capital efficiency, as one should avoid holding unnecessarily high levels of capital, and (ii) solvency of the insurance company, as an underestimation, on the other hand, may lead to insufficient capitalisation and safety. There seems to be a great deal of preconception as to how dependent insurance claims should be. Often, presence of dependence is taken as a given and rarely discussed or challenged, perhaps because of the lack of extensive datasets to be publicly analysed. In this paper, we take a different approach, and consider how much correlation some real datasets actually display (the Meyers–Shi dataset from the USA, and the AUSI dataset from Australia). We develop a simple theoretical framework that enables us to explain how and why correlations can be illusory (and what we mean by that). We show with some real examples that, sometimes, most (if not all) of the correlation can be “explained” by an appropriate methodology. Two major conclusions stem from our analysis.
1.In any attempt to measure cross-LoB correlations, careful modelling of the data needs to be the order of the day. The exercise will not be well served by rough modelling, such as the use of simple chain ladders, and may indeed result in the prescription of excessive risk margins and/or capital margins.2.Such empirical evidence as examined in the paper reveals cross-LoB correlations that vary only in the range zero to very modest. There is little evidence in favour of the high correlation assumed in some jurisdictions. The evidence suggests that these assumptions derived from either poor modelling or a misconception of the cross-LoB dependencies relevant to the purpose to which they are applied.
Reputation as Social Control in Present China: Use, Misuse, Abuse, and Bankruptcy
Authors: ZHAO Bo 
Published: January 2016

AbstractAlthough reputation in general plays an effective role in social control in human communal life, this does not seem to work well in present-day China. This article discusses why “reputation as social control” malfunctions in Chinese society in view of the widespread reputation bankruptcy in various professions. Starting with China’s discredited milk industry, it analyses similar regulatory failures in the economic, judicial, academic, and political sectors, explaining the interplay between key institutions. It argues that such regulatory failures can largely be attributed to the use, misuse, and abuse of reputation as a means of social control by the Chinese Party State to maintain monopoly power in a much diversified society resulting from China’s rapid economic development and globalization. Based on the analysis of the Chinese circumstances, this article is also meant to contribute to the study of reputation as social control in general.
Democratic curiosity in times of surveillance
Authors: Huysmans Jef 
Published: January 2016

AbstractTaking my cue from feminist curiosity and literature on the everyday in surveillance studies, I am proposing ‘democratic curiosity’ as a tool for revisiting the question of democracy in times of extitutional surveillance. Democratic curiosity seeks to bring into analytical play the social and political power of little nothings – the power of subjects, things, practices, and relations that are rendered trivial – and the uncoordinated disputes they enact. Revisiting democracy from this angle is particularly pertinent in extitutional situations in which the organisation and practices of surveillance are spilling beyond their panoptic configurations. Extitutional surveillance is strongly embedded in diffusing arrangements of power and ever more extensively enveloped in everyday life and banal devices. To a considerable degree these modes of surveillance escape democratic institutional repertoires that seek to bring broader societal concerns to bear upon surveillance. Extitutional enactments of democracy then become an important question for both security and surveillance studies.
Symmetry breaking of azimuthal thermoacoustic modes: the UQ perspective
Authors: Bauerheim M. , Ndiaye A. , Constantine P. , Moreau S. , Nicoud F. 
Published: January 2016

Since its introduction in the late 19th century, symmetry breaking has been found to play a crucial role in physics. In particular, it appears as one key phenomenon controlling hydrodynamic and acoustic instabilities in problems with rotational symmetries. A previous paper investigated its desired potential application to the control of circumferential thermoacoustic modes in one annular cavity coupled with multiple flames (Bauerheimet al.,J. Fluid Mech., vol. 760, 2014, pp. 431–465). The present paper focuses on a similar problem when symmetry breaking appears unintentionally, for example when uncertainties due to tolerances are taken into account. It yields a large uncertainty quantification (UQ) problem containing numerous uncertain parameters. To tackle this well-known ‘curse of dimensionality’, a novel UQ methodology is used. It relies on the active subspace approach to construct a reduced set of input variables. This strategy is applied on two annular cavities coupled by 19 flames to determine its modal risk factor, i.e. the probability of an azimuthal acoustic mode being unstable. Since each flame is modelled by two uncertain parameters, it leads to a large UQ problem involving 38 parameters. An acoustic network model is then derived, which yields a nonlinear dispersion relation for azimuthal modes. This nonlinear problem, subject to bifurcations, is solved quasi-analytically. Results show that the dimension of the probabilistic problem can be drastically reduced, from 38 uncertain parameters to only 3. Moreover, it is found that the three active variables are related to physical quantities, which unveils underlying phenomena controlling the stability of the two coupled cavities. The first active variable is associated with a coupling strength controlling the bifurcation of the system, while the two others correspond to a symmetry-breaking effect induced by the uncertainties. Thus, an additional destabilization effect appear caused by the non-uniform pattern of the uncertainty distribution, which breaks the initial rotating symmetry of the annular cavities. Finally, the active subspace is exploited by fitting the response surface with polynomials (linear, quadratic and cubic). By comparing accuracy and cost, results prove that 5 % error can be achieved with only 30 simulations on the reduced space, whereas 2000 are required on the complete initial space. It exemplifies that this novel UQ technique can accurately predict the risk factor of an annular configuration at low cost as well as unveil key parameters controlling the stability.
Organisational-based self-esteem: A within country comparison of outcomes between Māori and New Zealand Europeans
Authors: Haar Jarrod M. , Brougham David 
Published: January 2016

AbstractThe present study investigates the influence of cultural differences on organisational-based self-esteem within New Zealand. A sample of 211 New Zealand European employees and 291 Māori (indigenous people of New Zealand) employees answered a range of questions on organisational-based self-esteem, job, and mood outcomes. Findings suggest that organisational-based self-esteem was directly associated with job satisfaction, organisational commitment, and organisational citizenship behaviours, as well as positive and negative affect. Relationships between variables were tested for each sample separately and for a combined sample. A comparison between the separate and combined samples was also investigated. The findings from this study suggest that organisational-based self-esteem has a greater influence on job outcomes and mood outcomes for Māori when compared with New Zealand Europeans. This could be because employment fulfils a basic need for self-determination. The present study suggests the implementation of tailored management policies to support cultural differences within New Zealand’s vibrant and diverse workforce.
DISTINGUISHING PERFECT SET PROPERTIES IN SEPARABLE METRIZABLE SPACES
Authors: MEDINI ANDREA 
Published: January 2016

AbstractAll spaces are assumed to be separable and metrizable. Our main result is that the statement “For every space X, every closed subset of X has the perfect set property if and only if every analytic subset of X has the perfect set property” is equivalent to b > ω1 (hence, in particular, it is independent of ZFC). This, together with a theorem of Solecki and an example of Miller, will allow us to determine the status of the statement “For every space X, if every Γ subset of X has the perfect set property then every Γ′ subset of X has the perfect set property” as Γ, Γ′ range over all pointclasses of complexity at most analytic or coanalytic.Along the way, we define and investigate a property of independent interest. We will say that a subset W of 2ω has the Grinzing property if it is uncountable and for every uncountable Y ⊆ W there exists an uncountable collection consisting of uncountable subsets of Y with pairwise disjoint closures in 2ω. The following theorems hold.(1)There exists a subset of 2ω with the Grinzing property.(2)Assume MA + ¬CH. Then 2ω has the Grinzing property.(3)Assume CH. Then 2ω does not have the Grinzing property.The first result was obtained by Miller using a theorem of Todorčević, and is needed in the proof of our main result.
VARIATIONS SUR UN THÈME DE ALDAMA ET SHELAH
Authors: MILLIET CÉDRIC 
Published: January 2016

AbstractWe consider a group G that does not have the independence property and study the definability of certain subgroups of G, using parameters from a fixed elementary extension G of G. If X is a definable subset of G, its trace on G is called an externally definable subset. If H is a definable subgroup of G, we call its trace on G an external subgroup. We show the following. For any subset A of G and any external subgroup H of G, the centraliser of A, the A-core of H and the iterated centres of H are external subgroups. The normaliser of H and the iterated centralisers of A are externally definable. A soluble subgroup S of derived length ℓ is contained in an S-invariant externally definable soluble subgroup of G of derived length ℓ. The subgroup S is also contained in an externally definable subgroup X ∩ G of G such that X generates a soluble subgroup of G of derived length ℓ. Analogue results are discussed when G is merely a type definable group in a structure that does not have the independence property.
Investigation into the acute effects of total and partial energy restriction on postprandial metabolism among overweight/obese participants
Authors: Antoni Rona , Johnston Kelly L. , Collins Adam L. , Robertson M. Denise 
Published: January 2016

AbstractThe intermittent energy restriction (IER) approach to weight loss involves short periods of substantial (75–100 %) energy restriction (ER) interspersed with normal eating. This study aimed to characterise the early metabolic response to these varying degrees of ER, which occurs acutely and prior to weight loss. Ten (three female) healthy, overweight/obese participants (36 (SEM 5) years; 29·0 (sem 1·1) kg/m2) took part in this acute three-way cross-over study. Participants completed three 1-d dietary interventions in a randomised order with a 1-week washout period: isoenergetic intake, partial 75 % ER and total 100 % ER. Fasting and postprandial (6-h) metabolic responses to a liquid test meal were assessed the following morning via serial blood sampling and indirect calorimetry. Food intake was also recorded for two subsequent days of ad libitum intake. Relative to the isoenergetic control, postprandial glucose responses were increased following total ER (+142 %; P=0·015) and to a lesser extent after partial ER (+76 %; P=0·051). There was also a delay in the glucose time to peak after total ER only (P=0·024). Both total and partial ER interventions produced comparable reductions in postprandial TAG responses (−75 and −59 %, respectively; both P<0·05) and 3-d energy intake deficits of approximately 30 % (both P=0·015). Resting and meal-induced thermogenesis were not significantly affected by either ER intervention. In conclusion, our data demonstrate the ability of substantial ER to acutely alter postprandial glucose–lipid metabolism (with partial ER producing the more favourable overall response), as well as incomplete energy-intake compensation amongst overweight/obese participants. Further investigations are required to establish how metabolism adapts over time to the repeated perturbations experienced during IER, as well as the implications for long-term health.
Colonization of Rhodnius prolixus gut by Trypanosoma cruzi involves an extensive parasite killing
Authors: FERREIRA ROBERTA CARVALHO , KESSLER RAFAEL LUIS , LORENZO MARCELO GUSTAVO , PAIM RAFAELA MAGALHÃES MACEDO , FERREIRA LUCIANA DE LIMA , PROBST CHRISTIAN MACAGNAN , ALVES-SILVA JULIANA , GUARNERI ALESSANDRA APARECIDA 
Published: January 2016

SUMMARYTrypanosoma cruzi, the etiological agent of Chagas disease, is ingested by triatomines during their bloodmeal on an infected mammal. Aiming to investigate the development and differentiation of T. cruzi inside the intestinal tract of Rhodnius prolixus at the beginning of infection we fed insects with cultured epimastigotes and blood trypomastigotes from infected mice to determine the amount of recovered parasites after ingestion. Approximately 20% of the ingested parasites was found in the insect anterior midgut (AM) 3 h after feeding. Interestingly, a significant reduction (80%) in the numbers of trypomastigotes was observed after 24 h of infection suggesting that parasites were killed in the AM. Moreover, few parasites were found in that intestinal portion after 96 h of infection. The evaluation of the numbers of parasites in the posterior midgut (PM) at the same periods showed a reduced parasite load, indicating that parasites were not moving from the AM. Additionally, incubation of blood trypomastigotes with extracts from R. prolixus AMs revealed that components of this tissue could induce significant death of T. cruzi. Finally, we observed that differentiation from trypomastigotes to epimastigotes is not completed in the AM; instead we suggest that trypomastigotes change to intermediary forms before their migration to the PM, where differentiation to epimastigotes takes place. The present work clarifies controversial points concerning T. cruzi development in insect vector, showing that parasite suffers a drastic decrease in population size before epimastigonesis accomplishment in PM.
IMAGES OF QUANTUM REPRESENTATIONS OF MAPPING CLASS GROUPS AND DUPONT–GUICHARDET–WIGNER QUASI-HOMOMORPHISMS
Authors: Funar Louis , Pitsch Wolfgang 
Published: January 2016

We prove that either the images of the mapping class groups by quantum representations are not isomorphic to higher rank lattices or else the kernels have a large number of normal generators. Further, we show that the images of the mapping class groups have non-trivial 2-cohomology, at least for small levels. For this purpose, we considered a series of quasi-homomorphisms on mapping class groups extending the previous work of Barge and Ghys (Math. Ann. 294(1992), 235–265) and of Gambaudo and Ghys (Bull. Soc. Math. France 133(4) (2005), 541–579). These quasi-homomorphisms are pull-backs of the Dupont–Guichardet–Wigner quasi-homomorphisms on pseudo-unitary groups along quantum representations.
Constraining X-ray-Induced Photoevaporation of Protoplanetary Disks Orbiting Low-Mass Stars
Authors: Punzi Kristina M. , Kastner Joel H. , Rodriguez David , Principe David A. , Vican Laura 
Published: January 2016

AbstractLow-mass, pre-main sequence stars possess intense high-energy radiation fields as a result of their strong stellar magnetic activity. This stellar UV and X-ray radiation may have a profound impact on the lifetimes of protoplanetary disks. We aim to constrain the X-ray-induced photoevaporation rates of protoplanetary disks orbiting low-mass stars by analyzing serendipitous XMM-Newton and Chandra X-ray observations of candidate nearby (D < 100 pc), young (age < 100 Myr) M stars identified in the GALEX Nearby Young-Star Survey (GALNYSS).
First Results from the Disk Eclipse Search with KELT (DESK) Survey
Authors: Rodriguez Joseph E. , Pepper Joshua , Stassun Keivan G. 
Published: January 2016

AbstractUsing time-series photometry from the Kilodegree Extremely Little Telescope (KELT) exoplanet survey, we are looking for eclipses of stars by their protoplanetary disks, specifically in young stellar associations. To date, we have discovered two previously unknown, large dimming events around the young stars RW Aurigae and V409 Tau. We attribute the dimming of RW Aurigae to an occultation by its tidally disrupted disk, with the disruption perhaps resulting from a recent flyby of its binary companion. Even with the dynamical environment of RW Aurigae, the distorted disk material remains very compact and presumably capable of forming planets. This system also shows that strong binary interactions with disks can also influence planet and core composition by stirring up and mixing materials during planet formation. We interpret the dimming of V409 Tau to be due to a feature, possibly a warp or perturbation, lying at least 10 AU from the host star in its nearly edge-on circumstellar disk.
eROSITA - Nearby Young Stars in X-rays
Authors: Robrade J. 
Published: January 2016

AbstractX-ray surveys are well suited to detect, identify and study young stars based on their high levels of magnetic activity and thus X-ray brightness. The eROSITA instrument onboard the Spectrum-Roentgen-Gamma (SRG) satellite will perform an X-ray all-sky survey that surpasses existing data by a sensitivity increase of more than an order of magnitude. The 4 yr survey is expected to detect more than half a million stars and stellar systems in X-rays.