bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Prevalence and Impact of Migraine and Severe Headache in the United States: Figures and Trends From Government Health Studies
Authors: Burch Rebecca , Rizzoli Paul , Loder Elizabeth 
Published: March 2018

Background and ObjectivesIn this targeted systematic review, we aimed to identify up‐to‐date prevalence estimates of migraine and severe headache in adults from population‐based US government surveys. Our goal was to assess the stability of prevalence estimates over time, and to identify additional information pertinent to the burden and treatment of migraine and other severe headache conditions.MethodsWe searched for the most current publicly available summary statistics from the National Health Interview Survey (NHIS), the National Hospital Ambulatory Medical Care Survey (NHAMCS), and the National Ambulatory Medical Care Survey (NAMCS). We extracted and summarized data from each study over time and as a function of demographic variables.ResultsThe prevalence and burden of self‐reported migraine and severe headache in the US adult population is high, affecting roughly 1 out of every 6 American and 1 in 5 women over a 3‐month period (15.3% overall [95% CI 14.75‐15.85], 9.7% of males [95% CI 9.05‐10.35] and 20.7% of females [95% CI 19.84‐21.56]). The prevalence has been remarkably stable over a period of 19 years. The prevalence of migraine or severe headache in 2015 was highest in American Indian or Alaska Natives (18.4%) compared with whites, blacks, or Hispanics, with the lowest prevalence in Asians (11.3%). There is a higher burden of migraine in those aged 18‐44 (17.9%), people who are unemployed (21.4%), those with family income less than $35,000 per year (19.9%), and the elderly and disabled (16.4%). Headache is consistently the fourth or fifth most common reason for visits to the emergency department, accounting for roughly 3% of all emergency department visits annually. In reproductive aged women, headache is the third leading cause of emergency department visits.ConclusionsSevere headache and migraine remain important public health problems that are more common and burdensome for women, particularly women of childbearing age, and other historically disadvantaged segments of the population. These inequities could be exacerbated if new high‐cost treatments are inaccessible to those who need them most.
Oxidation resistance of SiC nanowires reinforced SiC coating prepared by a CVD process on SiC‐coated C/C composites
Authors: Qiang Xinfa , Li Hejun , Zhang Nan , Liu Yunfan , Tian Song 
Published: March 2018

AbstractOxidation protective SiC nanowires‐reinforced SiC (SiCNWs‐SiC) coating was prepared on pack cementation (PC) SiC‐coated carbon/carbon (C/C) composites by a simple chemical vapor deposition (CVD) process. This double‐layer SiCNWs‐SiC/PC SiC‐coating system on C/C composites not only has the advantages of SiC buffer layer but also has the toughening effects of SiCNWs. The microstructure and phase composition of the nanowires and the coatings were examined by SEM, TEM, and XRD. The single‐crystalline β‐SiC nanowires with twins and stacking faults were deposited uniformly and oriented randomly with diameter of 50‐200 nm and length ranging from several to tens micrometers. The dense SiCNWs‐SiC coating with some closed pores was obtained by SiC nanocrystals stacked tightly with each other on the surface of SiCNWs. After introducing SiCNWs in the coating system, the oxidation resistance is effectively improved. The oxidation test results showed that the weight loss of the SiCNWs‐SiC/PC SiC‐coated samples was 4.91% and 1.61% after oxidation at 1073 K for 8 hours and at 1473 K for 276 hours, respectively. No matter oxidation at which temperature, the SiCNWs‐SiC/PC SiC‐coating system has better anti‐oxidation property than the single‐layer PC SiC coating or the double‐layer CVD SiC/PC SiC coating without SiCNWs.
Effects of interface bonding properties on cyclic tensile behavior of unidirectional C/Si3N4 and SiC/Si3N4 composites
Authors: Li Longbiao , Reynaud Pascal , Fantozzi Gilbert 
Published: March 2018

AbstractIn this paper, the effect of fiber/matrix interface bonding properties on the cyclic loading/unloading tensile stress−strain hysteresis loops of 2 different ceramic‐matrix composites (CMCs), ie, C/Si3N4 and SiC/Si3N4, has been investigated using micromechanical approach. The relationships between the damage mechanisms (ie, matrix multicracking saturation, fiber/matrix interface debonding and fibers failure), hysteresis dissipated energy and internal frictional damage parameter have been established. The damage evolution processes under cyclic loading/unloading tensile of C/Si3N4 and SiC/Si3N4 composites corresponding to different fiber/matrix interface bonding properties have been analyzed through damage models and interface frictional damage parameter. For the C/Si3N4 composite with the weakest fiber/matrix interface bonding, the composite possesses the lowest tensile strength and the highest failure strain; the hysteresis dissipated energy increases at low peak stress, and the stress−strain hysteresis loops correspond to the interface partially and completely debonding. However, for the SiC/Si3N4 composite with weak interface bonding, the composite possesses the highest tensile strength and intermediate failure strain; and the hysteresis dissipated energy increases faster and approaches to a higher value than that of composite with the strong interface bonding.
Quality, sensory and volatile profiles of fresh‐cut big top nectarines cold stored in air or modified atmosphere packaging
Authors: Cozzolino Rosaria , Cefola Maria , Pace Bernardo , Malorni Livia , Martignetti Antonella , Montemurro Nicola , Pellicano Mario Paolo 
Published: March 2018

SummarySolid‐phase microextraction (SPME) GC‐MS was used to investigate the volatile organic compound (VOC) profile of fresh‐cut ‘Big Top’ nectarine samples, stored in unsealed bags (AIR) or packed in active modified atmosphere (MAP) after 8 days of cold storage. Nectarine slices were also subjected to sensory and quality analysis after harvest and at the end of the storage. MAP preserved the overall quality, the appearance and the olfactory properties of nectarine slices during storage, while AIR samples showed symptoms of dehydration and browning. Sixty VOCs were identified in total in the headspace of the fresh nectarines and cold‐stored fruit slices samples. Principal component analysis performed on VOCs allowed to differentiate fresh nectarines from cold‐stored samples, with lactones and terpenes mainly related to fresh samples, and ester compounds positively correlated to AIR or MAP samples. Partial least square regression models allowed to identify a pool of VOC predictors of olfactory sensory descriptors.
Classification of wooden breast myopathy in chicken pectoralis major by a standardised method and association with conventional quality assessments
Authors: Dalgaard Line B. , Rasmussen Martin Krøyer , Bertram Hanne C. , Jensen Jens A. , Møller Hanne S. , Aaslyng Margit D. , Hejbøl Eva K. , Pedersen Jacob R. , Elsser‐Gravesen Dieter , Young Jette F. 
Published: March 2018

SummaryWooden breast (WB) abnormalities of broilers compromise the quality of fresh and processed meat. Yet, no standardised classification method for evaluating WB currently exists. We here provide a novel classification method to determine the severity of WB by palpation. Data were evaluated by one‐way anova. The classification method proved robust and reliable to classify broiler filets into three distinct categories (no, moderate and severe WB). This was supported by histological findings, demonstrating less muscle tissue in WB‐affected samples. Moreover, moisture content, resistance to compression, mobile water fraction, drip loss and cooking loss, as well as intramuscular and surface pH also increased with WB. Using the classification method, we demonstrated that severe WB increased the diversity of the endogenous microflora and promoted growth of Enterobacteriaceae. In conclusion, the presented classification method correlates with known meat quality traits and will be a valuable tool for future studies on WB.
Edible foxtail millet flour stabilises and retain the in vitro activity of blueberry bioactive components
Authors: Mak Kit‐Kay , Rathinasabapathy Thirumurugan , Sankaran Shanta , Kandasamy Murugesh , Ling Elaine Chan Wan , Balijepalli Madhu Katyayani , Sagineedu Sreenivasa Rao , Pichika Mallikarjuna Rao 
Published: March 2018

SummaryBlueberries, a functional food, are rich in bioactive polyphenols and anthocyanins. However, the shelf life is short and requires cold storage. This study provides evidence that edible foxtail millet flour (FMF) efficiently sorbs only blueberry bioactive components (polyphenols and anthocyanins) but not sugars, improves their stability and retains the activity. The concentration of blueberry polyphenols and anthocyanins sorbed to FMF ranged from 6 to 113 and 4 to 41 mg g−1, respectively. The concentration of bioactive components in one serving of blueberries (73 g) is equivalent to those present in 1.2 g of blueberry‐enriched foxtail millet flour (BFMF). The blueberry bioactive sorbed onto FMF remained stable for at least 16 weeks at 40 °C. BFMF eluates inhibited α‐glucosidase enzyme activity and scavenged the free radicals conferring that blueberry bioactive components in BFMF retained the activity. The sorption process described here provides a practical way of creating low glycemic protein‐rich edible flour enriched with plant bioactive compounds without sugars.
A Closed Immigration Country: Revisiting Japan as a Negative Case
Authors: Komine Ayako 
Published: March 2018

AbstractThe Japanese government maintains that the country admits only skilled economic migrants. Its statistics tell a different story. Skilled and low‐skilled economic migrants are admitted in equal measure. The aim of this article is to explain the dissonance between the government's policy rhetoric and policy outcome by turning to policy output. To this end, I quantitatively analyse immigration admission channels for economic migrants, using Ruhs' Openness and Rights Indicators (2013). The main findings not only go against much of what we believe about Japan but helps us reach a more nuanced understanding of its immigration policies. I demonstrate that Japanese immigration admission policies have become more open towards de facto low‐skilled economic migrants over time and are more open to de facto low‐skilled economic migrants than to de jure skilled economic migrants. Instead of openness, the gains made by certain groups of de jure skilled economic migrants have been exclusive immigration privileges related to permanent residence and family sponsorship.
Impact of left atrial volume, sphericity, and fibrosis on the outcome of catheter ablation for atrial fibrillation
Authors: den Uijl Dennis W. , Cabanelas Nuno , Benito Eva M. , Figueras Rosa , Alarcón Francisco , Borràs Roger , Prat Susanna , Guasch Eduard , Perea Rosario , Sitges Marta , Brugada Josep , Berruezo Antonio , Mont Lluís 
Published: March 2018

AbstractIntroductionTo investigate the relation between left atrial (LA) volume, sphericity, and fibrotic content derived from contrast‐enhanced cardiac magnetic resonance imaging (CE‐CMR) and their impact on the outcome of catheter ablation for atrial fibrillation (AF).Methods and resultsIn 83 patients undergoing catheter ablation for AF, CE‐CMR was used to assess LA volume, sphericity, and fibrosis. There was a significant correlation between LA volume and sphericity (R = 0.535, P < 0.001) and between LA volume and fibrosis (R = 0.241, P = 0.029). Multivariate analyses demonstrated that LA volume was the strongest independent predictor of AF recurrence after catheter ablation (1.019, P = 0.018).ConclusionLA volume, sphericity, and fibrosis were closely related; however, LA volume was the strongest predictor of AF recurrence after catheter ablation.
COMPETITION AND MERGER ACTIVITY IN THE U.S. TELECOMMUNICATIONS INDUSTRY
Authors: Okoeguale Kevin , Loveland Robert 
Published: March 2018

AbstractIn this article we examine the U.S. telecommunications industry during a period of rapid deregulation to determine the effects of a deregulatory shock on industry competition and merger activity. We show that merger activity exhibits a clear wave‐like pattern, regardless of the listing status of the participants. Increased competition and IPO activity following deregulation increased cash‐flow volatility and probability of exit while the introduction of new technology increased dispersion of economic efficiency across the industry. These changes resulted in a significant increase in merger activity. Competition also played an important role in shaping “who buys whom?”
THE EFFECTS OF MUTUAL FUNDS ON M&A COMPENSATION
Authors: Bick Patty , Crook Matthew D. 
Published: March 2018

AbstractMotivated by shareholders’ interest in combating executive wealth expropriation through the merger and acqusition (M&A) process, we study how mutual funds influence firm behavior around an acquisition through votes against management proposals. We find that mutual funds reduce the chief executive officer's ability to extract rents during the M&A process by voting against management‐sponsored compensation proposals after the acquisition, thus lowering both excess compensation and increasing pay‐for‐performance sensitivity. Furthermore, mutual fund voting magnifies the impact on negatively performing firms and firms with a larger amount of the mutual fund's holdings in the firm.
Effects of Caps on Cost Sharing for Skilled Nursing Facility Services in Medicare Advantage Plans
Authors: Keohane Laura M. , Rahman Momotazur , Thomas Kali S. , Trivedi Amal N. 
Published: March 2018

ObjectivesTo evaluate a federal regulation effective in 2011 that limited how much that Medicare Advantage (MA) plans could charge for the first 20 days of care in a skilled nursing facility (SNF).DesignDifference‐in‐differences retrospective analysis comparing SNF utilization trends from 2008–2012.SettingSelect MA plans.ParticipantsMembers of 27 plans with mandatory cost sharing reductions (n=132,000) and members of 21 plans without such reductions (n=138,846).MeasurementsMean monthly number of SNF admissions and days per 1,000 members; annual proportion of MA enrollees exiting the plan.ResultsIn plans with mandated cost sharing reductions, cost sharing for the first 20 days of SNF care decreased from an average of $2,039 in 2010 to $992 in 2011. In adjusted analyses, plans with mandated cost‐sharing reductions averaged 158.1 SNF days (95% confidence interval (CI)=153.2–163.1 days) per 1,000 members per month before the cost sharing cap. This measure increased by 14.3 days (95% CI=3.8–24.8 days, p=0.009) in the 2 years after cap implementation. However, increases in SNF utilization did not significantly differ between plans with and without mandated cost‐sharing reductions (adjusted between‐group difference: 7.1 days per 1,000 members, 95% CI=–6.5–20.8, p=.30). Disenrollment patterns did not change after the cap took effect.ConclusionsWhen a federal regulation designed to protect MA members from high out‐of‐pocket costs for postacute care took effect, the use of SNF services did not change.
Determination of nursing students’ attitudes towards the use of technology
Authors: Terkes Nurten , Celik Ferya , Bektas Hicran 
Published: March 2018

AbstractAimThe use of technology is increasingly important in nursing education and practice. For this reason, it is necessary to determine the attitudes of nursing students towards technology.MethodsThis study was conducted with 508 nursing students. A personal information form that was prepared by the researchers and the Attitudes Toward Technology Scale were used as the data collection tools.ResultsThe mean score that was obtained by the nursing students from the Attitudes Toward Technology Scale was 61.53 ± 1.13. The Cronbach's alpha coefficient was found to be 0.90. There was a statistically significant difference between the sexes, using a computer, tablet, or laptop, using technology to reach health‐related information, and for professional development, using mobile applications related to drug information. There was also a statistical difference between using the Periscope and Scorpio accounts from social media and using Excel and PowerPoint from Microsoft programs.ConclusionNursing students are capable of technology‐based teaching, which can be expanded as a result.
Dispossession by neglect: Agricultural land sales in Southern India
Authors: Vijayabaskar M. , Menon Ajit 
Published: March 2018

AbstractActive land markets in the periphery of Chennai have resulted in large tracts of agricultural land being bought by non‐agricultural actors seeking returns primarily from speculation. We argue in this paper that the financialization of land and consequent spurt of agricultural land sales are central to what scholars have termed land grab. Recent literature on land grabs has focused primarily on processes of accumulation by dispossession and the coercive role of the state. Our contention is that land grabs more commonly occur due to the state underinvesting in agriculture, resulting in “dispossession by neglect” of especially marginal and small farmers. Dispossession by neglect better captures the fluid boundary between the coercive and voluntary in contemporary land grabs.
Outcomes following balloon mitral valvuloplasty in pregnant females with mitral stenosis and significant sub valve disease with severe decompensated heart failure
Authors: Ananthakrishna Pillai Ajith , Ramasamy Chandramohan , V Saranya Gousy , Kottyath Harichandrakumar 
Published: March 2018

BackgroundMitral stenosis may present with decompensated heart failure during pregnancy. Many patients do have advanced sub valve disease and present late with decompensated state. The outcomes of balloon mitral valvuloplasty (BMV) in such advanced sub valve disease with severe heart failure in pregnancy has not been specifically studied till now.MethodsA descriptive study looking at the immediate and long‐term outcomes of pregnant patients with MS who presented with severe heart failure and sub valve disease who had undergone BMV.ResultsNinety‐six patients were studied. The mean gestational age was 23.4 ± 10.9 weeks .Mean SpO2 was 89% at admission,17% were in cardiogenic shock and 33.33 were on mechanical ventilation. The mean Wilkin's score was 9.71 ± 2.1 and sub valve score was 3.3 ± 0.12. BMV was successful in 77 (80.2%) patients and failed in 19. In 5.2% cases, acute severe MR occurred. There were 11 maternal deaths (six in failed and five in success group). A successful obstetric outcome was seen in 71 patients in success (92%) and 11/19 (57%) in failed (P < 0.001). The obstetric outcomes were better in success versus failure group. Anova post hoc analysis showed sustained gradient reductions at 1 and 5 year follow‐up (P = 0.03) in success group.ConclusionsBMV offers substantial improvement in clinical outcomes among pregnant patients with MS and heart failure even with severe sub valve disease. The morality rate among failed was high at 31%. The obstetric outcomes were poor after a failed BMV. Outcomes following balloon mitral valvuloplasty in pregnant females with mitral stenosis and significant sub valve disease with severe decompensated heart failure.
Congruence effects of contingent reward leadership intended and experienced on team effectiveness: The mediating role of distributive justice climate
Authors: Carter Min Z. , Mossholder Kevin W. , Harris John N. 
Published: March 2018

We examined why congruence in contingent reward leadership (CRL) between leaders and teams can stimulate positive team processes and effectiveness. Specifically, our study explored the effect of congruence between perceptions of CRL intended by leaders and experienced collectively by team members. We hypothesized that team distributive justice climate serves as an emergent team state through which the positive effects of CRL congruence on team effectiveness occur. We found support for hypothesized congruence effects and discuss the implications of our findings as well as future research possibilities.Practitioner points

Our study demonstrates the benefits of getting leaders and teams to ‘see eye to eye’ on critical workplace perceptions such as CRL intended and experienced.

The study findings indicate that distributive justice climate underlies the process through which leader–team agreement on CRL intended and experienced influences team effectiveness.

Our study emphasizes the importance to examine CRL from the perspectives of both leaders and teams.

Our results suggest that organization HR specialists and line managers should work together in executing compensation strategies.
Translucency of Zirconia Ceramics before and after Artificial Aging
Authors: Walczak Katarzyna , Meißner Heike , Range Ursula , Sakkas Andreas , Boening Klaus , Wieckiewicz Mieszko , Konstantinidis Ioannis 
Published: March 2018

AbstractPurposeThe aging of zirconia ceramics (Y‐TZP) is associated with tetragonal to monoclinic phase transformation. This change in microstructure may affect the optical properties of the ceramic. This study examines the effect of aging on the translucency of different zirconia materials.Materials and Methods120 disc‐shaped specimens were fabricated from four zirconia materials: Cercon ht white, BruxZir Solid Zirconia, Zenostar T0, Lava Plus (n = 30 per group). Accelerated aging was performed in a steam autoclave (134°C, 0.2 MPa, 5 hours). CIELab coordinates (L*, a*, b*) and luminous reflectance (Y) were measured with a spectrophotometer before and after aging. Contrast ratio (CR) and translucency parameter (TP) were calculated from the L*, a*, b*, and Y tristimulus values. The general linear model (Bonferroni adjusted) was used to compare both parameters before and after aging, as well as between the different zirconia materials (p ≤ 0.05).ResultsCR and TP differed significantly before and after aging in all groups tested. Before aging, Zenostar T showed the highest and Lava Plus showed the lowest translucency. After aging, Cercon ht and Zenostar T showed the highest and BruxZir and Lava Plus the lowest translucency.ConclusionsAging reduced the translucency in all specimens tested. Furthermore, translucency differed between the zirconia brands tested. Nevertheless, the differences were below the detectability threshold of the human eye. The aging process can influence the translucency and thus the esthetic outcome of zirconia restorations; however, the changes in translucency were minimal and probably undetectable by the human eye.
Natural disasters and relief assistance: Empirical evidence on the resilience of U.S. counties using dynamic propensity score matching
Authors: Bondonio Daniele , Greenbaum Robert T. 
Published: March 2018

AbstractThis paper utilizes a novel dynamic propensity score matching approach for multiple cohorts of U.S. counties between 1989 and 1999 to examine local economy resilience to rare natural disasters. Affected counties are sorted based on disaster intensity and are carefully matched to similar counties that did not experience a disaster. A difference‐in‐difference estimator compares trends of affected counties’ postdisaster business establishments, employment, and payroll to counterfactual trends in the matched counties. All affected counties experienced short‐run drops in economic activity that was particularly noticeable in higher‐intensity disasters. In the longer run, less distressed counties returned to their estimated counterfactual trends, but counties with lower predisaster socioeconomic conditions still lagged in growth, particularly in cases of lower‐intensity disasters. Policymakers can use this information to better prepare responses to future disasters.