bluuebunny/crossref_metadata_2025_split huggingface dataset:
An experimental study on tuning the consistency of NoSQL systems
Authors: Huang Xiangdong , Wang Jianmin , Yu Philip S. , Bai Jian , Zhang Jinrui 
Published: March 2017

SummaryThe eventual consistency model has been widely adopted in NoSQL systems. By tolerating weak consistency, these systems attain high throughput and availability while sustaining side effects on user experience and developer friendliness. Trading off consistency from latency has been a common consensus. An important but widely ignored problem is how to control the consistency of an existing system without the necessity of modifying the system implementation. In this paper, we present a systematic study on the client‐centric consistency of a NoSQL system, Cassandra, and disclose how the consistency can be substantially enhanced by tuning the system configurations when users use partial quorum settings. We use session guarantee as the consistency model and analyze the root cause of consistency violation, testifying that the length of the write queue is a reasonable indicator for consistency quantification. For inconsistency mitigation, we show through extensive experiments how the consistency is affected by the read and write processes of the system, and how the consistency can be improved by tuning system configurations. In particular, we provide developers with recommended configurations by changing the write thread number and the fine‐grained quorum setting for enhanced consistency control. Because consistency anomalies do not occur uniformly, we discuss how to stabilize the consistency by analyzing system logs.
A high output power and low phase noise GaN HEMT VCO with array of switchable inductors
Authors: Kao Hsuan‐Ling , Yeh Chih‐Sheng , Chiu Hsien‐Chin , Cho Cheng‐Lin , Cheng Chun‐Hu 
Published: March 2017

SummaryThis paper presents cross‐coupled voltage‐controlled oscillators (VCOs) involving array of switchable inductors (i.e., N = 1 and N = 2 switchable inductors) and implemented using gallium‐nitride high electron mobility transistors on Si substrate technology for worldwide interoperability for microwave access applications. Band selection and coarse frequency tuning were achieved using the array of switchable inductors, whereas fine tuning was controlled using varactors. Two bands were obtained using the one‐stage switchable inductor VCO operating in the ranges 3.41–3.57 GHz and 3.85–3.94 GHz. The VCO output power (Pout) was 21.8 dBm at 3.57 GHz from a 10‐V power supply. Four continuous bands were obtained using the two‐stage switchable inductors VCO operating in the range of 3.16–3.4, 3.25–3.64, 3.48–3.71 and 3.64–3.9 GHz, respectively. An additional band was generated by fine‐tuning the inductance through mutual coupling between the transmission line and one of the inductors. The proposed two‐stage switchable inductors VCO provided a 21% tuning range at frequencies ranging with a control voltage ranging from 12 to 20 V, a low phase noise of −123 dBc/Hz at a 1‐MHz offset from a 3.3‐GHz carrier and a Pout of 21 dBm at 3.5 GHz from a 10‐V power supply. Copyright © 2017 John Wiley & Sons, Ltd.
Attitudes toward orthorexia nervosa relative to DSM‐5 eating disorders
Authors: Simpson Courtney C. , Mazzeo Suzanne E. 
Published: March 2017

AbstractObjectiveA pattern of disordered eating involving a pathological fixation with healthy food consumption, labeled orthorexia nervosa (ON), has recently generated attention; however, research has not yet investigated perceptions of ON‐related behaviors. This study examined potential stigmatization of ON, compared with DSM‐5 ED diagnoses.MethodParticipants (N = 505) were randomly assigned to read a vignette depicting a woman with anorexia nervosa (AN), bulimia nervosa (BN), binge‐eating disorder (BED), or ON. They then answered questions about the individual depicted in the vignette. A series of MANOVAs investigated whether opinions and beliefs about the person depicted varied as a function of the disorder described in the vignette.ResultsIndividuals with ON were perceived as less likely to “improve with treatment” than individuals with BN, and less likely to “pull themselves together,” than individuals with BED. Individuals with ON and AN were viewed as “hard[er] to talk to” and more of a “danger to others” compared with individuals with BED. ON was viewed as less distressing, less likely to evoke sympathy, and more acceptable than the other disorders. Finally, “poor living choices” were perceived as contributing more substantially to ON. Participants' attributions of various personality characteristics did not differ based on ED diagnosis.DiscussionResults suggest that ON is viewed as less severe, more desirable, and more often the result of personal life choices. However, findings also imply that ON is associated with stigma, similar to DSM‐5 EDs. These negative attitudes might reinforce ON behaviors, and limit awareness of their potential complications.
Alternative state? Experimentally induced Fucus canopy persists 38 yr in an Ascophyllum‐dominated community
Authors: Menge Bruce A. , Bracken Matthew E. S. , Lubchenco Jane , Leslie Heather M. 
Published: March 2017

AbstractExperimental tests of the hypothesis that ecological communities can exist in “multiple stable states” are rare, and some argue, impossible, because of the unlikelihood that any system will meet the necessary criteria. These are that alternative states (1) are in the same location, (2) experience the same environment, (3) persist for multiple generations, (4) resist repeated perturbations, and (5) result from a pulse manipulation. In 1974, we initiated an experiment testing the ability of Ascophyllum nodosum‐dominated rocky intertidal communities to recover from complete canopy removal. Manipulations were monitored frequently for 5 yr after clearance and resurveyed again after a 35‐yr hiatus. After clearance, Ascophyllum was replaced immediately by another fucoid alga, Fucus spp, which continued to dominate the space through 1979 despite regular annual recruitment by Ascophyllum. Observations in 2009 revealed that Fucus spp. still dominated the cleared plots. Surveys in 2011 and 2013 demonstrated that Fucus persisted in experimental plots and Ascophyllum persisted in adjacent, unmanipulated plots. All criteria for testing an alternative state were met. Fucus persisted through multiple generations of both fucoids, a steady annual rain of recruits of both species, a high frequency of storm‐driven perturbations, and it resulted from a pulse manipulation. Likely mechanisms include poor Ascophyllum recruitment directly under the Fucus spp. canopy despite abundant recruitment in adjacent areas, self‐maintenance by Fucus spp. through high recruitment and fast growth, and recruitment facilitation of Fucus by the barnacle Semibalanus balanoides. Several lines of evidence indicate that other possible mechanisms including indirect facilitation of fucoids through predation on competitors (mussels), and positive or negative effects of littorine grazing, are unlikely. Although prior results in Maine suggested that the mussel Mytilus edulis was an alternative stable state, the new results suggest that Fucus spp. was the alternative state to Ascophyllum. During the nearly four decades of this experiment, a number of important species including fucoids, littorine grazers, and mussels all declined in abundance, most likely due to climate change. The presumed impact of climate change makes prediction of the long‐term response of this system difficult, but it already differs dramatically from its structure in the 1970s.
Zn2GeO4@C Core–Shell Nanorods as Highly Reversible Anode Materials for Lithium‐Ion Batteries
Authors: Chen Yifan , Lin Yangfan , Du Ning , Xiao Chengmao , Wu Shali , Zhang Yaguang , Yang Deren 
Published: March 2017

AbstractWe report the synthesis of Zn2GeO4 nanorods using a simple hydrothermal process. After the coating of a carbon layer by the thermal decomposition of acetylene gas, the Zn2GeO4@C core–shell nanorods were obtained. The as‐synthesized Zn2GeO4@C core–shell nanorods were used as anode materials of lithium‐ion batteries, which showed good cycling and rate performance. A highly reversible specific capacity of 718 mAh g−1 after 400 cycles was achieved at a current density of 400 mA g−1. The core–shell nanostructures and partially amorphous and porous nanostructures helped to alleviate the volume change and enhance the conductivity during the charge/discharge process, which may be responsible for the good performance.
Improving the robustness of the control volume finite element method with application to multiphase porous media flow
Authors: Salinas Pablo , Pavlidis Dimitrios , Xie Zhihua , Jacquemyn Carl , Melnikova Yulia , Jackson Matthew D , Pain Christopher C 
Published: March 2017

SummaryControl volume finite element methods (CVFEMs) have been proposed to simulate flow in heterogeneous porous media because they are better able to capture complex geometries using unstructured meshes. However, producing good quality meshes in such models is nontrivial and may sometimes be impossible, especially when all or parts of the domains have very large aspect ratio. A novel CVFEM is proposed here that uses a control volume representation for pressure and yields significant improvements in the quality of the pressure matrix. The method is initially evaluated and then applied to a series of test cases using unstructured (triangular/tetrahedral) meshes, and numerical results are in good agreement with semianalytically obtained solutions. The convergence of the pressure matrix is then studied using complex, heterogeneous example problems. The results demonstrate that the new formulation yields a pressure matrix than can be solved efficiently even on highly distorted, tetrahedral meshes in models of heterogeneous porous media with large permeability contrasts. The new approach allows effective application of CVFEM in such models.
A core avenue for transcultural research on dementia: on the cross‐linguistic generalization of language‐related effects in Alzheimer's disease and Parkinson's disease
Authors: Calvo Noelia , Ibáñez Agustín , Muñoz Edinson , García Adolfo M. 
Published: March 2017

ObjectiveLanguage is a key source of cross‐cultural variability, which may have both subtle and major effects on neurocognition. However, this issue has been largely overlooked in two flourishing lines of research assessing the relationship between language‐related neural systems and dementia. This paper assesses the limitations of the evidence on (i) the neuroprotective effects of bilingualism in Alzheimer's disease and (ii) specific language deficits as markers of Parkinson's disease.DesignFirst, we outline the rationale behind each line of research. Second, we review available evidence and discuss the potential impact of cross‐linguistic factors. Third, we outline ideas to foster progress in both fields and, with it, in cross‐cultural neuroscience at large.ResultsOn the one hand, studies on bilingualism suggest that sustained use of more than one language may protect against Alzheimer's disease symptoms. On the other hand, insights from the embodied cognition framework point to syntactic and action‐verb deficits as early (and even preclinical) markers of Parkinson's disease. However, both fields share a key limitation that lies at the heart of cultural neuroscience: the issue of cross‐linguistic generalizability.ConclusionRelevant evidence for both research trends comes from only a handful of (mostly Indo‐European) languages, which are far from capturing the full scope of structural and typological diversity of the linguistic landscape worldwide. This raises questions on the external validity of reported findings. Greater collaboration between linguistic typology and cognitive neuroscience seems crucial as a first step to assess the impact of transcultural differences on language‐related effects across neurodegenerative diseases. Copyright © 2017 John Wiley & Sons, Ltd.
Development of hybrid scaffolds with natural extracellular matrix deposited within synthetic polymeric fibers
Authors: Goyal Ritu , Vega Maria E. , Pastino Alexandra K. , Singh Shivani , Guvendiren Murat , Kohn Joachim , Murthy N. Sanjeeva , Schwarzbauer Jean E. 
Published: March 2017

AbstractA major challenge of tissue engineering is to generate materials that combine bioactivity with stability in a form that captures the robust nature of native tissues. Here we describe a procedure to fabricate a novel hybrid extracellular matrix (ECM)—synthetic scaffold biomaterial by cell‐mediated deposition of ECM within an electrospun fiber mat. Synthetic polymer fiber mats were fabricated using poly(desamino tyrosyl‐tyrosine carbonate) (PDTEC) co‐spun with poly(ethylene glycol) (PEG) used as a sacrificial polymer. PEG removal increased the overall mat porosity and produced a mat with a layered structure that could be peeled into separate sheets of about 50 μm in thickness. Individual layers had pore sizes and wettability that facilitated cell infiltration over the depth of the scaffold. Confocal microscopy showed the formation of a highly interpenetrated network of cells, fibronectin fibrils, and synthetic fibers mimicking a complex ECM as observed within tissues. Decellularization did not perturb the structure of the matrix or the fiber mat. The resulting hybrid ECM‐scaffold promoted cell adhesion and spreading and stimulated new ECM assembly by stem cells and tumor cells. These results identify a new technique for fabricating highly porous synthetic fibrous scaffolds and an approach to supplement them with natural biomimetic cues. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 2162–2170, 2017.
Wnt/β‐Catenin Signaling Activates Expression of the Bone‐Related Transcription Factor RUNX2 in Select Human Osteosarcoma Cell Types
Authors: Vega Oscar A. , Lucero Claudia M.J. , Araya Hector F. , Jerez Sofia , Tapia Julio C. , Antonelli Marcelo , Salazar‐Onfray Flavio , Las Heras Facundo , Thaler Roman , Riester Scott M. , Stein Gary S. , van Wijnen Andre J. , Galindo Mario A. 
Published: March 2017

ABSTRACTOsteosarcoma is the most common malignant bone tumor in children and adolescents. Metastasis and poor responsiveness to chemotherapy in osteosarcoma correlates with over‐expression of the runt‐related transcription factor RUNX2, which normally plays a key role in osteogenic lineage commitment, osteoblast differentiation, and bone formation. Furthermore, WNT/β‐catenin signaling is over‐activated in osteosarcoma and promotes tumor progression. Importantly, the WNT/β‐catenin pathway normally activates RUNX2 gene expression during osteogenic lineage commitment. Therefore, we examined whether the WNT/β‐catenin pathway controls the tumor‐related elevation of RUNX2 expression in osteosarcoma. We analyzed protein levels and nuclear localization of β‐catenin and RUNX2 in a panel of human osteosarcoma cell lines (SAOS, MG63, U2OS, HOS, G292, and 143B). In all six cell lines, β‐catenin and RUNX2 are expressed to different degrees and localized in the nucleus and/or cytoplasm. SAOS cells have the highest levels of RUNX2 protein that is localized in the nucleus, while MG63 cells have the lowest RUNX2 levels which is mostly localized in the cytoplasm. Levels of β‐catenin and RUNX2 protein are enhanced in HOS, G292, and 143B cells after treatment with the GSK3β inhibitor SB216763. Furthermore, small interfering RNA (siRNA)‐mediated depletion of β‐catenin inhibits RUNX2 expression in G292 cells. Thus, WNT/β‐catenin activation is required for RUNX2 expression in at least some osteosarcoma cell types, where RUNX2 is known to promote expression of metastasis related genes. J. Cell. Biochem. 118: 3662–3674, 2017. © 2017 Wiley Periodicals, Inc.
Severity of nonalcoholic fatty liver disease on sonography and risk of coronary heart disease
Authors: Lee Sun Hwa , Yun Seong Jong , Kim Dong Hyeon , Jo Hyeon Hwan , Park Yong Sung 
Published: March 2017

ABSTRACTPurposeTo evaluate the relationship between nonalcoholic fatty liver disease (NAFLD) on sonography (US) and the risk of coronary heart disease (CHD) as well as the predictive value of US‐diagnosed NAFLD to determine intermediate/high CHD risk compared with as well as in combination on with NAFLD fibrosis score (NFS).MethodsThis retrospective study included 1,276 patients examined between November 2015 and August 2016. NAFLD was categorized as absent, mild, moderate, or severe based on liver‐to‐kidney echogenicity, visibility of intrahepatic vessel walls, and the diaphragm. The Framingham risk score (FRS) and NFS were used to predict CHD risk and hepatic fibrosis severity. Spearman correlation test, multivariate‐adjusted logistic regression analysis, and receiver operating characteristic curves were used for statistical evaluation.ResultsFRS increased as NAFLD severity increased, and US‐determined NAFLD severity and FRS were highly positively correlated (r = 0.683, p < 0.001). The odds ratios for intermediate/high CHD risk increased with increasing NAFLD severity. The predictive performance of US‐determined NAFLD severity for determining intermediate/high CHD risk in NAFLD patients was 0.738. There was no significant difference between US‐determined NAFLD severity and NFS in terms of identifying intermediate/high CHD risk (p = 0.88). However, the combination of US‐determined NAFLD severity and NFS significantly improved the ability to distinguish intermediate/high CHD risk compared with that of US‐determined NAFLD severity or NFS alone (p < 0.001 for both).ConclusionsUS‐determined NAFLD severity was well correlated with FRS and associated with the prevalence of intermediate/high CHD risk. The combination of US‐determined NAFLD severity and NFS may be useful for predicting CHD risk. © 2017 Wiley Periodicals, Inc. J Clin Ultrasound 45:391–399, 2017
Tweedie regression model: a proposed statistical approach for modelling indoor signal path loss
Authors: Hassine Aymen , Masmoudi Afif , Ghribi Abdelaziz 
Published: March 2017

AbstractIn this paper, we focused on the modelling of the signal path loss prediction by using the Tweedie regression model. The distance and the obstacles quantity between receiver and transmitter are chosen as explanatory regression variables. This enables us to compare it with the log‐normal shadowing model. The Tweedie regression model is a wide case of the generalized linear model with a Tweedie response distribution characterized by the unit variance function with power mean‐variance relationshipsμp,. We studied the asymptotic normality and the confidence interval of the predicted signal path loss. The performance of this model was studied using a real data sample to select the fitted regression model by varying the Tweedie parameterp. We illustrated our approach by considering an experimental study and using the bootstrap technique to select the appropriate Tweedie regression model. The experimental results showed that the proposed approach outperforms the prediction of signal path loss.
Effect of the type and level of hydration of alcoholic solvents on the simultaneous extraction of oil and chlorogenic acids from sunflower seed press cake
Authors: Scharlack Nayara K , Aracava Keila K , Rodrigues Christianne EC 
Published: March 2017

AbstractBACKGROUNDThe present study aimed to evaluate the replacement of hexane by alcoholic solvents in oil extraction from sunflower seed press cake. The use of ethanol and isopropanol has important advantages, including low toxicity and good operational safety. Thus, in the present study, solid‐liquid extractions were performed in a single stage from 60 to 90 °C and in consecutive extractions in three stages at 90 °C.RESULTSSolvent hydration negatively affected the extraction of oil but favored the extraction of chlorogenic acids (CAs), especially when ethanol was used. Regarding oxidative stability, the oils extracted using ethanol presented long induction times, which could be related to the high levels of not only CAs and tocopherols, but also phospholipids.CONCLUSIONAlcoholic solvents can be used for extraction to produce sunflower seed oil containing minor compounds that give it greater oxidative stability. In addition, the results obtained using hydrous ethanol showed that this solvent can yield defatted sunflower seed meal with a low content of CAs, enabling future use of the protein fraction. © 2017 Society of Chemical Industry
Isolation enhancement of compact dual‐wideband MIMO antenna using flag‐shaped stub
Authors: Katie Mohannad Obaid , Jamlos Mohd Faizal , Mohsen Alqadami Abdulrahman Shueai , Jamlos Mohd Aminudin 
Published: March 2017

ABSTRACTA compact dual‐wideband multiple‐input multiple‐output (MIMO) antenna with a size of 36 × 22 mm2 is proposed for portable systems. The proposed antenna consists of two identical monopole antenna elements (MA) which are placed on one side of the substrate. The ground plane with Flag‐shaped stub is placed on the other side of the substrate to reduce mutual coupling and enhance isolation between the antenna elements. It is found out that the Flag‐shaped stub introduced one more coupling path and this coupling path cancel out the original coupling between the MAs. The proposed antenna has two operating wideband of 2.5–2.85 GHz (lower band) and 4.82–6.1 GHz (upper band) owing to the slits and slots that are located besides Flag‐shaped stub. Those slits and slots generate certain resonances and simultaneously notched‐out the initial antenna's band. Combination technique of Flag‐shaped stub with slits and slots contribute to the isolation of better than 18 dB across the lower band and more than 20 dB at the upper band. Instead of good isolation at both bands and compact size, ECC of 0.05 leads the antenna suitability for MIMO multiple standards applications such as LTE, WLAN, WiMAX, and HIPERLAN. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1028–1032, 2017
Stitched transmission lines for wearable RF devices
Authors: Daniel Isaac H. , Flint James A. , Seager Rob 
Published: March 2017

ABSTRACTA novel stitched transmission line for wearable devices has been manufactured and tested to measure its scattering parameters from 0.04 to 4 GHz. The stitched transmission line which is 150 mm long consists of an inner conductor surrounded by a tubular insulating layer. For shielding purpose, the structure is stitched onto a denim material with a conductive thread with the aid of a novel manufacturing technique using a standard hardware. The S‐Parameters were investigated with three different stitch angles
through simulation and experiments, demonstrating that the stitched transmission line can work usefully and consistently from 0.04 to 4 GHz. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1048–1052, 2017
Dual band compact monopole antenna for ISM 2.4/5.8 frequency bands with bluetooth, Wi‐Fi, and mobile applications
Authors: Mondal Kalyan , Sarkar Partha Pratim 
Published: March 2017

ABSTRACTIn this work, a dual bands omnidirectional monopole antenna is proposed. A planer Y‐shaped patch is loaded on the top of the surface and a slot is loaded on the ground plane to obtained broadband. Rogers RT/duroid5880(tm) substrate is used with dielectric constant 2.2 and loss tangent 0.0009. The results of the proposed antenna for the variation of width and length of the ground plane are investigated. Two licensed free frequency bands at 2.4 GHz and 5.8 GHz are obtained for WiFi and Bluetooth application. The measured frequency bands of 2.3–2.52 GHz at 2.4 GHz and 4.22–10.30 GHz with two resonant frequencies at 4.96 and 8.36 GHz are obtained. The peak antenna gain of 4.6 dBi at 2.4 GHz is achieved. Simulation has been done using MOM base Ansoft designer software. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1061–1065, 2017