bluuebunny/crossref_metadata_2025_split huggingface dataset:
On phase separation in systems of coupled elliptic equations: Asymptotic analysis and geometric aspects
Authors: Soave Nicola , Zilio Alessandro 
Published: May 2016

We consider a family of positive solutions to the system of

k

components

−\mathrm{\Delta }u_{i,\beta } = f(x,u_{i,\beta })−\beta u_{i,\beta }\sum \limits_{j \neq i}a_{ij}u_{j,\beta }^{2}\:\text{in }\mathrm{\Omega },

where

\mathrm{\Omega } \subset \mathbb{R}^{N}

with

N \geq 2

. It is known that uniform bounds in

L^{\infty }

of

\{\mathbf{u}_{\beta }\}

imply convergence of the densities to a segregated configuration, as the competition parameter

β

diverges to

+∞

. In this paper we establish sharp quantitative point-wise estimates for the densities around the interface between different components, and we characterize the asymptotic profile of

\mathbf{u}_{\beta }

in terms of entire solutions to the limit system

\mathrm{\Delta }U_{i} = U_{i}\sum \limits_{j \neq i}a_{ij}U_{j}^{2}.

Moreover, we develop a uniform-in-

β

regularity theory for the interfaces.
Frequency and Determinants of a Short-Interval Follow-up Recommendation after an Abnormal Screening Mammogram
Authors: Pelletier Eric , Daigle Jean-Marc , Defay Fannie , Major Diane , Guertin Marie-Hélène , Brisson Jacques 
Published: May 2016

Purpose After imaging assessment of an abnormal screening mammogram, a follow-up examination 6 months later is recommended to some women. Our aim was to identify which characteristics of lesions, women, and physicians are associated to such short-interval follow-up recommendation in the Quebec Breast Cancer Screening Program. Methods Between 1998 and 2008, 1,839,396 screening mammograms were performed and a total of 114,781 abnormal screens were assessed by imaging only. Multivariate analysis was done with multilevel Poisson regression models with robust variance and generalized linear mixed models. Results A short-interval follow-up was recommended in 26.7% of assessments with imaging only, representing 2.3% of all screens. Case-mix adjusted proportion of short-interval follow-up recommendations varied substantially across physicians (range: 4%-64%). Radiologists with high recall rates (≥15%) had a high proportion of short-interval follow-up recommendation (risk ratio: 1.82; 95% confidence interval: 1.35-2.45) compared to radiologists with low recall rates (<5%). The adjusted proportion of short-interval follow-up was high (22.8%) even when a previous mammogram was usually available. Conclusions Short-interval follow-up recommendation at assessment is frequent in this Canadian screening program, even when a previous mammogram is available. Characteristics related to radiologists appear to be key determinants of short-interval follow-up recommendation, rather than characteristics of lesions or patient mix. Given that it can cause anxiety to women and adds pressure on the health system, it appears important to record and report short-interval follow-up and to identify ways to reduce its frequency. Short-interval follow-up recommendations should be considered when assessing the burden of mammography screening.
Nonlandmark classification in paleobiology: computational geometry as a tool for species discrimination
Authors: Mike Joshua , Sumrall Colin D. , Maroulas Vasileios , Schwartz Fernando 
Published: May 2016

AbstractOne important and sometimes contentious challenge in paleobiology is discriminating between species, which is increasingly accomplished by comparing specimen shape. While lengths and proportions are needed to achieve this task, finer geometric information, such as concavity, convexity, and curvature, plays a crucial role in the undertaking. Nonetheless, standard morphometric methodologies such as landmark analysis are not able to capture in a quantitative way these features and other important fine-scale geometric notions.Here we develop and implement state-of-the-art techniques from the emerging field of computational geometry to tackle this problem with the Mississippian blastoid Pentremites. We adapt a previously known computational framework to produce a measure of dissimilarity between shapes. More precisely, we compute “distances” between pairs of 3D surface scans of specimens by comparing a mix of global and fine-scale geometric measurements. This process uses the 3D scan of a specimen as a whole piece of data incorporating complete geometric information about the shape; as a result, scans used must accurately reflect the geometry of whole, undamaged, undeformed specimens. Using this information we are able to represent these data in clusters and ultimately reproduce and refine results obtained in previous work on species discrimination. Our methodology is landmark free, and therefore faster and less prone to human error than previous landmark-based methodologies.
Adherence to Alternative Healthy Eating Index in relation to depression and anxiety in Iranian adults
Authors: Saneei Parvane , Hajishafiee Maryam , Keshteli Ammar Hassanzadeh , Afshar Hamid , Esmaillzadeh Ahmad , Adibi Peyman 
Published: May 2016

AbstractEarlier studies have shown a protective association between adherence to healthy eating guidelines and mental disorders in Western nations; however, data in this regard are limited from the understudied region of Middle East. We examined the association between adherence to healthy eating guidelines, as measured by Alternative Healthy Eating Index (AHEI)-2010, and prevalence of anxiety and depression in a large sample of Iranian adults. In this cross-sectional study, data on dietary intakes of 3363 adult participants were collected using a validated dish-based 106-item semi-quantitative FFQ. Adherence to healthy eating was quantified using AHEI-2010, as suggested by earlier publications. The Iranian validated version of Hospital Anxiety and Depression Scale was used to assess anxiety and depression in study participants. Data on other covariates were gathered using a pre-tested questionnaire. Overall, the prevalence of anxiety and depression was 15·2 % (males 10·8 % and females 18·3 %) and 30·0 % (males 22·9 % and females 35·1 %), respectively. After controlling for potential confounders, those in the top quartile of AHEI-2010 had a 49 % lower chance of anxiety (OR 0·51; 95 % CI 0·35, 0·72) and a 45 % lower odds of depression (OR 0·55; 95 % CI 0·42, 0·72), compared with those in the bottom quartile. Stratified analysis by sex revealed that women in the highest categories of AHEI-2010 had a 49 % lower odds of having anxiety and depression, after adjustment for confounders, but no significant association was found in men. In addition, among individuals who were 40 years old or younger, those with high adherence to AHEI-2010 were 58 and 51 % less likely to have anxiety and depression, compared with those with less adherence. Adherence to healthy eating was inversely associated with a lower chance of anxiety and depression in Iranian adults. Prospective studies are required to confirm these associations in Middle-Eastern populations.
VARIABILITY IN SECOND LANGUAGE LEARNING
Authors: Tagarelli Kaitlyn M. , Ruiz Simón , Vega José Luis Moreno , Rebuschat Patrick 
Published: May 2016

Second language learning outcomes are highly variable, due to a variety of factors, including individual differences, exposure conditions, and linguistic complexity. However, exactly how these factors interact to influence language learning is unknown. This article examines the relationship between these three variables in language learners.Native English speakers were exposed to an artificial language containing three sentence patterns of varying linguistic complexity. They were randomly assigned to two groups—incidental and instructed—designed to promote the acquisition of implicit and explicit knowledge, respectively. Learning was assessed with a grammaticality judgment task, and subjective measures of awareness were used to measure whether exposure had resulted in implicit or explicit knowledge. Participants also completed cognitive tests.Awareness measures demonstrated that learners in the incidental group relied more on implicit knowledge, whereas learners in the instructed group relied more on explicit knowledge. Overall, exposure condition was the most significant predictor of performance on the grammaticality judgment task, with learners in the instructed group outperforming those in the incidental group. Performance on a procedural learning task accounted for additional variance. When outcomes were analyzed according to linguistic complexity, exposure condition was the most significant predictor for two syntactic patterns, but it was not a predictor for the most complex sentence group; instead, procedural learning ability was.
“Common Joys, Sorrows, Adventures, and Struggles”: Transnational Encounters in Amy Beach's “Gaelic” Symphony
Authors: GERK SARAH 
Published: May 2016

AbstractAmy Beach's “Gaelic” Symphony is the most prominent nineteenth-century American expression of Irishness in music. Despite the reference to another country in its title, the work has largely been interpreted via the lens of American nationalism. Its historiography reflects the immense interest in national style in nineteenth-century American music scholarship. This article initiates a discussion about nineteenth-century American composers’ engagement with the world beyond their own national borders. It explores the “Gaelic” Symphony's transnational dimensions, which engage largely with two groups: concert music composers and the Irish diaspora. Regarding the former, the article illuminates nuances of intertextuality in Beach's style. It revises the historical narrative surrounding the “Gaelic” Symphony as a response to Antonín Dvořák's “New World” Symphony, finding multiple additional models for Beach's work. The “Gaelic” Symphony is positioned instead as a representation of concert music styles that valued cosmopolitan approaches and judged composers on the skill with which they consciously blended multiple streams of influence. Regarding the latter category of the Irish, the article contextualizes the symphony within a revival of Irish cultural practices taking place in the 1890s, revealing how constructions of Irishness in the symphony reflect Gaelic revival values and respond to social tensions between Boston's Irish-American community and the city's upper class.
Implementing Mindfulness-Based Cognitive Therapy (MBCT) as mindfulness skills courses offered as an adjunct to individual therapy: a feasibility and effectiveness study of mixed staff and patient groups in secondary care
Authors: Hortynska Kamila , Masterson Ciara , Connors Lesley , Geary Lesley , Winspear Richard 
Published: May 2016

AbstractThere is growing evidence regarding the effectiveness of mindfulness-based interventions offered to diagnostically diverse groups of participants. This study examined the feasibility and effectiveness of adapted Mindfulness-Based Cognitive Therapy (MBCT) groups offered to NHS patients in a secondary-care Psychology and Psychotherapy Service. The group was run as an adjunct to individual therapy and accepted referrals from all therapists in the service, so participants had experienced a range of therapeutic approaches prior to attending the group. The nine groups run during the project also included staff participants, as part of a capacity-building strategy. Results indicate high levels of acceptability, with low drop-out rates. Standardized outcome measures were used to examine the effectiveness of the group, and patient participants demonstrated improvements which were statistically significant. Qualitative feedback from group participants and referrers was positive. The findings support implementation of MBCT as part of a package of psychological therapy interventions. Further research regarding this form of MBCT is discussed.
Matching relations for optimal entanglement concentration and purification
Authors: Kong Fan-Zhen , Xia Hui-Zhi , Yang Ming , Yang Qing , Cao Zhuo-Liang 
Published: May 2016

AbstractThe bilateral controlled NOT (CNOT) operation plays a key role in standard entanglement purification process, but the CNOT operation may not be the optimal joint operation in the sense that the output entanglement is maximized. In this paper, the CNOT operations in both the Schmidt-projection based entanglement concentration and the entanglement purification schemes are replaced with a general joint unitary operation and the optimal matching relations between the entangling power of the joint unitary operation and the non-maximal entangled channel are found for optimizing the entanglement in- crement or the output entanglement. The result is somewhat counter-intuitive for entanglement concentration. The output entanglement is maximized when the entangling power of the joint unitary operation and the quantum channel satisfy certain relation. There exist a variety of joint operations with non-maximal entangling power that can induce a maximal output entanglement, which will greatly broaden the set of the potential joint operations in entanglement concentration. In addition, the entanglement increment in purification process is maximized only by the joint unitary operations (including CNOT) with maximal entangling power.
Analysis of serum immune markers in seropositive and seronegative rheumatoid arthritis and in high-risk seropositive arthralgia patients
Authors: Chalan Paulina , Bijzet Johan , van den Berg Anke , Kluiver Joost , Kroesen Bart-Jan , Boots Annemieke M. H. , Brouwer Elisabeth 
Published: May 2016

AbstractPresence of autoantibodies precedes development of seropositive rheumatoid arthritis (SP RA) and seropositive arthralgia patients (SAP) are at risk of developing RA. The aims of the study are to identify additional serum immune markers discriminating between SP and seronegative (SN) RA, and markers identifying high-risk SAP. Sera from SAP (n = 27), SP RA (n = 22), SN RA (n = 11) and healthy controls (n = 20) were analyzed using the Human Cytokine 25-Plex Panel. Selected markers were validated in independent cohorts of SP RA (n = 35) and SN RA (n = 12) patients. Eleven of 27 SAP developed RA within 8 months (median follow-up time, range 1–32 months), and their baseline serum markers were compared to 16 non-progressing SAP. SAP and SP RA patients showed a marked overlap in their systemic immune profiles, while SN RA showed a distinct immune profile. Three of 4 markers discriminating between SP and SN RA (IL-1β, IL-15 and Eotaxin, but not CCL5) were similarly modulated in independent cohorts. SAP progressing to RA showed trends for increases in IL-5, MIP-1β, IL-1RA and IL-12 compared to non-progressing SAP. ROC analysis showed that serum IL-5 most accurately discriminated between the two SAP groups (AUC > 0.8), suggesting that baseline IL-5 levels may aid the identification of high-risk SAP.
Phase-reference monitoring in coherent-state discrimination assisted by a photon-number resolving detector
Authors: Bina Matteo , Allevi Alessia , Bondani Maria , Olivares Stefano 
Published: May 2016

AbstractPhase estimation represents a crucial challenge in many fields of Physics, ranging from Quantum Metrology to Quantum Information Processing. This task is usually pursued by means of interferometric schemes, in which the choice of the input states and of the detection apparatus is aimed at minimizing the uncertainty in the estimation of the relative phase between the inputs. State discrimination protocols in communication channels with coherent states also require the monitoring of the optical phase. Therefore, the problem of phase estimation is relevant to face the issue of coherent states discrimination. Here we consider a quasi-optimal Kennedy-like receiver, based on the interference of two coherent signals, to be discriminated, with a reference local oscillator. By means of the Bayesian processing of a small amount of data drawn from the outputs of the shot-by-shot discrimination protocol, we demonstrate the achievement of the minimum uncertainty in phase estimation, also in the presence of uniform phase noise. Moreover, we show that the use of photon-number resolving detectors in the receiver improves the phase-estimation strategy, especially with respect to the usually employed on/off detectors. From the experimental point of view, this comparison is realized by employing hybrid photodetectors.
Universal quantum correlation close to quantum critical phenomena
Authors: Qin Meng , Ren Zhong-Zhou , Zhang Xin 
Published: May 2016

AbstractWe study the ground state quantum correlation of Ising model in a transverse field (ITF) by implementing the quantum renormalization group (QRG) theory. It is shown that various quantum correlation measures and the Clauser-Horne-Shimony-Holt inequality will highlight the critical point related with quantum phase transitions and demonstrate nonanalytic phenomena and scaling behavior when the size of the systems becomes large. Our results also indicate a universal behavior of the critical exponent of ITF under QRG theory that the critical exponent of different measures is identical, even when the quantities vary from entanglement measures to quantum correlation measures. This means that the two kinds of quantum correlation criterion including the entanglement-separability paradigm and the information-theoretic paradigm have some connections between them. These remarkable behaviors may have important implications on condensed matter physics because the critical exponent directly associates with the correlation length exponent.
Tunable Picosecond Laser Pulses via the Contrast of Two Reverse Saturable Absorption Phases in a Waveguide Platform
Authors: Tan Yang , Chen Lianwei , Wang Dong , Chen Yanxue , Akhmadaliev Shavkat , Zhou Shengqiang , Hong Minghui , Chen Feng 
Published: May 2016

AbstractHow to enhance the optical nonlinearity of saturable absorption materials is an important question to improve the functionality of various applications ranging from the high power laser to photonic computational devices. We demonstrate the saturable absorption (SA) of VO2 film attributed to the large difference of optical nonlinearities between the two states of the phase-transition materials (VO2). Such VO2 film demonstrated significantly improved performance with saturation intensity higher than other existing ultrathin saturable absorbers by 3 orders due to its unique nonlinear optical mechanisms in the ultrafast phase change process. Owing to this feature, a Q-switched pulsed laser was fabricated in a waveguide platform, which is the first time to achieve picosecond pulse duration and maintain high peak power. Furthermore, the emission of this VO2 waveguide laser can be flexibly switched between the continuous-wave (CW) and pulsed operation regimes by tuning the temperature of the VO2 film, which enables VO2-based miniature laser devices with unique and versatile functions.
HIV infection results in metabolic alterations in the gut microbiota different from those induced by other diseases
Authors: Serrano-Villar Sergio , Rojo David , Martínez-Martínez Mónica , Deusch Simon , Vázquez-Castellanos Jorge F. , Sainz Talía , Vera Mar , Moreno Santiago , Estrada Vicente , Gosalbes María José , Latorre Amparo , Margolles Abelardo , Seifert Jana , Barbas Coral , Moya Andrés , Ferrer Manuel 
Published: May 2016

AbstractImbalances in gut bacteria have been associated with multiple diseases. However, whether there are disease-specific changes in gut microbial metabolism remains unknown. Here, we demonstrate that human immunodeficiency virus (HIV) infection (n = 33) changes, at quantifiable levels, the metabolism of gut bacteria. These changes are different than those observed in patients with the auto-immune disease systemic lupus erythaematosus (n = 18) and Clostridium difficile-associated diarrhoea (n = 6). Using healthy controls as a baseline (n = 16), we demonstrate that a trend in the nature and directionality of the metabolic changes exists according to the type of the disease. The impact on the gut microbial activity and thus the metabolite composition and metabolic flux of gut microbes, is therefore disease-dependent. Our data further provide experimental evidence that HIV infection drastically changed the microbial community and the species responsible for the metabolism of 4 amino acids, in contrast to patients with the other two diseases and healthy controls. The identification in this present work of specific metabolic deficits in HIV-infected patients may define nutritional supplements to improve the health of these patients.
Superparamagnetic Properties of Hemozoin
Authors: Inyushin M. , Kucheryavih Yu. , Kucheryavih L. , Rojas L. , Khmelinskii I. , Makarov V. 
Published: May 2016

AbstractWe report that hemozoin nanocrystals demonstrate superparamagnetic properties, with direct measurements of the synthetic hemozoin magnetization. The results show that the magnetic permeability constant varies from μ = 4585 (at −20 °C) to 3843 (+20 °C), with the values corresponding to a superparamagnetic system. Similar results were obtained from the analysis of the diffusion separation of natural hemozoin nanocrystals in the magnetic field gradient, with μ = 6783 exceeding the value obtained in direct measurements by the factor of 1.8. This difference is interpreted in terms of structural differences between the synthetic and natural hemozoin. The ab initio analysis of the hemozoin elementary cell showed that the Fe3+ ion is in the high-spin state (S = 5/2), while the exchange interaction between Fe3+ electron-spin states was much stronger than kBT at room temperature. Thus, the spin dynamics of the neighboring Fe3+ ions are strongly correlated, lending support to the superparamagnetism.
Integrin CD11b attenuates colitis by strengthening Src-Akt pathway to polarize anti-inflammatory IL-10 expression
Authors: Hu Xiang , Han Chaofeng , Jin Jing , Qin Kewei , Zhang Hua , Li Tianliang , Li Nan , Cao Xuetao 
Published: May 2016

AbstractInterleukin-10 (IL-10) plays a central role in regulation of intestinal mucosal homeostasis and prevention of inflammatory bowel disease (IBD). We previously reported that CD11bhi regulatory dendritic cells (DCs) can produce more IL-10 and CD11b can negatively regulate Toll-like receptors (TLRs)-induced inflammatory responses in macrophages. However whether CD11b and its signaling can control autoimmunity via IL-10 production remains unclear. Here we found that CD11b deficient (Itgam−/−) mice were more susceptible to dextran sulfate sodium (DSS)-induced colitis, with more tumor necrosis factor α (TNF-α) while less IL-10 production. CD11b inhibited nuclear factor-kappa B (NF-κB) while promoted activator protein 1 (AP-1) activation through activating sarcoma oncogene (Src), leading to decreased TNF-α while increased IL-10 production. Src interacted with and promoted c-casitas B lineage lymphoma proto-oncogene (c-Cbl)-mediated degradation of the inhibitory subunit p85 of phosphatidylinositol 3-kinase (PI3K). Importantly, Src inhibitor dasatinib aggravated DSS-induced colitis by decreasing IL-10 while increasing TNF-α in vivo. Therefore, CD11b promotes IL-10 production by activating Src-Akt signal pathway. An axis of CD11b-Src pathway is important in balancing homeostasis of TLR-induced pro-inflammatory and anti-inflammatory responses.