bluuebunny/crossref_metadata_2025_split huggingface dataset:
A two‐stage sampling for robust feature matching
Authors: Chou Chih‐Chung , Seo Young Woo , Wang Chieh‐Chih 
Published: February 2018

AbstractFor any visual feature‐based SLAM (simultaneous localization and mapping) solutions, to estimate the relative camera motion between two images, it is necessary to find “correct” correspondence between features extracted from those images. Given a set of feature correspondents, one can use a n‐point algorithm with robust estimation method, to produce the best estimate to the relative camera pose. The accuracy of a motion estimate is heavily dependent on the accuracy of the feature correspondence. Such a dependency is even more significant when features are extracted from the images of the scenes with drastic changes in viewpoints and illuminations and presence of occlusions. To make a feature matching robust to such challenging scenes, we propose a new feature matching method that incrementally chooses a five pairs of matched features for a full DoF (degree of freedom) camera motion estimation. In particular, at the first stage, we use our 2‐point algorithm to estimate a camera motion and, at the second stage, use this estimated motion to choose three more matched features. In addition, we use, instead of the epipolar constraint, a planar constraint for more accurate outlier rejection. With this set of five matching features, we estimate a full DoF camera motion with scale ambiguity. Through the experiments with three, real‐world data sets, our method demonstrates its effectiveness and robustness by successfully matching features (1) from the images of a night market where presence of frequent occlusions and varying illuminations, (2) from the images of a night market taken by a handheld camera and by the Google street view, and (3) from the images of a same location taken daytime and nighttime.
Chronic pain in the workplace: A diary study of pain interference at work and worker strain
Authors: Fragoso Zachary L. , McGonagle Alyssa K. 
Published: February 2018

AbstractChronic pain is both prevalent and one of the leading causes of work‐related disability. Somatic experiences of pain and pain interference with daily activities at work may lead to psychological distress and strain in workers. In accordance with the appraisal theory of stress, we proposed a model in which pain interference mid‐workday predicts negative affect and end‐of‐workday emotional exhaustion in workers who interact with customers. Further, we proposed that pain interference predicts variance in negative affect and exhaustion beyond somatic experiences of pain, based on our theoretical proposition that pain interference represents a secondary stress appraisal. Participants (N = 86 full‐time workers with chronic pain) completed 2 online surveys per day for 5 consecutive workdays. Results from multilevel path analysis supported our hypotheses; pain interference predicted both negative affect and end‐of‐day emotional exhaustion while controlling for somatic experiences of pain (pain severity). Further, pain interference indirectly predicted end‐of‐day emotional exhaustion via negative affect while controlling for somatic pain experiences. Results highlight the importance of pain interference as a stressor at work for individuals working with chronic pain and point to the need for effective interventions for this working population.
Query expansion based on statistical learning from code changes
Authors: Huang Qing , Yang Yangrui , Zhan Xue , Wan Hongyan , Wu Guoqing 
Published: February 2018

SummaryThesaurus‐based, code‐related, and software‐specific query expansion techniques are the main contributions in free‐form query search. However, these techniques still could not put the most relevant query result in the first position because they lack the ability to infer the expansion words that represent the user needs based on a given query. In this paper, we discover that code changes can imply what users want and propose a novel query expansion technique with code changes (QECC). It exploits (changes, contexts) pairs from changed methods. On the basis of statistical learning from pairs, it can infer code changes for a given query. In this way, it expands a query with code changes and recommends the query results that meet actual needs perfectly. In addition, we implement InstaRec to perform QECC and evaluate it with 195 039 change commits from GitHub and our code tracker. The results show that QECC can improve the precision of 3 code search algorithms (ie, IR, Portfolio, and VF) by up to 52% to 62% and outperform the state‐of‐the‐art query expansion techniques (ie, query expansion based on crowd knowledge and CodeHow) by 13% to 16% when the top 1 result is inspected.
Concise Review: Regulatory Influence of Sleep and Epigenetics on Adult Hippocampal Neurogenesis and Cognitive and Emotional Function
Authors: Akers Katherine G. , Chérasse Yoan , Fujita Yuki , Srinivasan Sakthivel , Sakurai Takeshi , Sakaguchi Masanori 
Published: February 2018

Abstract
Neural stem and progenitor cells continue to generate new neurons in particular regions of the brain during adulthood. One of these neurogenic regions is the dentate gyrus (DG) of the hippocampus, which plays an important role in cognition and emotion. By exploiting this innate neuronal regeneration mechanism in the DG, new technologies have the potential to promote resistance to or recovery from brain dysfunction or degeneration. However, a deeper understanding of how adult DG neurogenesis is regulated by factors such as sleep and epigenetic modifications of gene expression could lead to further breakthroughs in the clinical application of neural stem and progenitor cells. In this review, we discuss the functions of adult-born DG neurons, describe the epigenetic regulation of adult DG neurogenesis, identify overlaps in how sleep and epigenetic modifications impact adult DG neurogenesis and memory consolidation, and suggest ways of using sleep or epigenetic interventions as therapies for neurodegenerative and psychiatric disorders. By knitting together separate strands of the literature, we hope to trigger new insights into how the functions of adult-generated neurons are directed by interactions between sleep-related neural processes and epigenetic mechanisms to facilitate novel approaches to preventing and treating brain disorders such as depression, post-traumatic stress disorder, and Alzheimer's disease.
Head‐to‐head comparison of 18F‐FP‐CIT and 123I‐FP‐CIT for dopamine transporter imaging in patients with Parkinson's disease: A preliminary study
Authors: Lee Inki , Kim Jin Su , Park Joon Yeun , Byun Byung Hyun , Park Su Yeon , Choi Joon Ho , Moon Hansol , Kim Jung Young , Lee Kyo Chul , Chi Dae Yoon , Kim Kyeong Min , Lim Ilhan , Kang Joo Hyun , Ahn Soon Hyuk , Kim Byung Il , Ha Jeong Ho , Lim Sang Moo 
Published: February 2018

Abstract123I‐FP‐CIT and 18F‐FP‐CIT are radiotracers which are widely used to diagnose Parkinson's disease (PD). However, to our knowledge, no studies to date have made head‐to‐head comparisons between 123I‐FP‐CIT and 18F‐FP‐CIT. Therefore, in this study, 123I‐FP‐CIT SPECT/CT was compared with 18F‐FP‐CIT PET/CT in the same cohort of subjects. Patients with PD and essential tremor (ET) underwent 123I‐FP‐CIT SPECT/CT and 18F‐FP‐CIT PET/CT. Visual and semiquantitative analyses were conducted. The specific binding ratio (SBR) and putamen to caudate ratio (PCR) were compared between subjects who underwent 123I‐FP‐CIT SPECT/CT and 18F‐FP‐CIT PET/CT. Visual analysis showed that the striatal uptake of both radiotracers was decreased in the PD group, whereas striatal uptake was intact in the ET group. The SBR between 123I‐FP‐CIT SPECT/CT and 18F‐FP‐CIT PET/CT showed a positive correlation (r = .78, p < .01). However, the mean SBRs on 18F‐FP‐CIT PET/CT were higher than those on 123I‐FP‐CIT SPECT/CT (2.19 ± .87 and 1.22 ± .49, respectively; p < .01). The PCRs in these two modalities were correlated with each other (r = .71, p < .01). The mean PCRs on 18F‐FP‐CIT PET/CT were not significantly higher than those on 123I‐FP‐CIT SPECT/CT (1.31 ± .19 and 0.98 ± .06, respectively; p = .06). These preliminary results indicate that the uptake of both 123I‐FP‐CIT and 18F‐FP‐CIT was decreased in the PD group when compared with the ET controls. Visual analyses using both methods did not affect the diagnostic accuracy in this study. However, semiquantitative analysis indicated a better contrast of 18F‐FP‐CIT PET/CT relative to 123I‐FP‐CIT SPECT/CT.
Social or Commercial? Innovation Strategies in Social Enterprises at Times of Turbulence
Authors: Ramus Tommaso , La Cara Barbara , Vaccaro Antonino , Brusoni Stefano 
Published: February 2018

ABSTRACT:In this study, we investigate how different internal and external stakeholders influence the innovation strategy of a social enterprise to adopt product, process, and partnership innovations that impact either social or commercial performance. Relying on survey data from a sample of work integration social enterprises, we find that in situations of turbulence, administrative leaders do not significantly influence the innovation strategy of a social enterprise. Instead, board members and external stakeholders seem to play a role. Our study contributes to strategic and business ethics research on social enterprises and, more broadly, to the literature that explores how business organizations combine social value creation and wealth generation.
The Epidemiology of Community Clostridium difficile Infection: A Five-Year Population-Based Study on the Bailiwick of Jersey, Channel Islands
Authors: Kumar Shankar , Chis Ster Irina , Pollok Richard , Muscat Ivan , Planche Timothy D. 
Published: February 2018

We studied healthcare-associated and community-associated Clostridium difficile infection (CDI) in Jersey, Channel Islands (2008–2012). The Island’s stable population has reliable denominator data, a clearly defined at-risk population, and healthcare contact that is easily followed. The vast majority of CDI cases had had recent healthcare contact, and true community-associated disease is extremely rare.Infect Control Hosp Epidemiol 2018;39:603–607
On triadic resonance as an instability mechanism in precessing cylinder flow
Authors: Albrecht Thomas , Blackburn Hugh M. , Lopez Juan M. , Manasseh Richard , Meunier Patrice 
Published: February 2018

Contained rotating flows subject to precessional forcing are well known to exhibit rapid and energetic transitions to disorder. Triadic resonance of inertial modes has been previously proposed as an instability mechanism in such flows, and that idea was developed into a successful model for predicting instability in a cylindrical container when departures from solid-body rotation are sufficiently small. Using direct numerical simulation and dynamic mode decomposition, we analyse instabilities of precessing cylinder flows whose three-dimensional basic states, steady in the gimbal frame of reference, may depart substantially from solid-body rotation. In the gimbal frame, the instability can be interpreted as resulting from a supercritical Hopf bifurcation that results in a limit-cycle flow. In the cylinder frame of reference, the basic state is a rotating wave with azimuthal wavenumber $m=1$, and the instability satisfies triadic-resonance conditions with the instability mode maintaining a fixed orientation with respect to the basic state. Thus, we are able to demonstrate the existence of two alternative but congruent explanations for the instability. Additionally, we show that basic states may depart substantially from solid-body rotation even with modest cylinder tilt angles, and growth rates for instabilities may be sufficiently large that nonlinear saturation to disordered states can occur within approximately ten cylinder revolutions, in agreement with experimental observations.
Between Anger and Engagement: Donald Trump and Black America
Authors: Towler Christopher C. , Parker Christopher S. 
Published: February 2018

AbstractHistory suggests that social movements for change are often met with powerful counter-movements. Relying upon movement counter-movement dynamics, this paper examines whether or not contemporary reactionary conservatism—in this case Donald Trump's candidacy in 2016, offers an opportunity for African-American mobilization. Today, the reactionary right presents a threat to racial progress and the black community as it has grown from direct opposition to the election of President Obama, immigration reform, and gay and lesbian rights. With conditions ripe for a movement in response to the right, we examine the mobilizing effect on African-Americans of the threatening political context symbolized by Donald Trump. If African-Americans are to retain political relevance beyond the Obama era, then black turnout will need to reach rates similar to the historic 2008 election. Using the 2016 Black Voter Project (BVP) Pilot Study, we explore African-American political engagement in the 2016 election, a time void of President Obama as a mobilizing figure. We find that African-Americans who hold strong negative opinions of Trump in 2016 voted at rates similar to the historical turnout of 2008, offering a possible strategy to mobilize blacks beyond Obama's presidency. Moreover, the threat that Trump represents significantly drives blacks to engage in politics beyond voting even after accounting for alternative explanations. In the end, Trump and the reactionary movement behind him offers a powerful mobilizing force for an African-American population that can no longer look toward the top of the Presidential ticket for inspiration.
Algebraic Limit Cycles on Quadratic Polynomial Differential Systems
Authors: Llibre Jaume , Valls Claudia 
Published: February 2018

AbstractAlgebraic limit cycles in quadratic polynomial differential systems started to be studied in 1958, and a few years later the following conjecture appeared: quadratic polynomial differential systems have at most one algebraic limit cycle. We prove that a quadratic polynomial differential system having an invariant algebraic curve with at most one pair of diametrically opposite singular points at infinity has at most one algebraic limit cycle. Our result provides a partial positive answer to this conjecture.
What Is Moral Relativism?
Authors: Wreen Michael 
Published: February 2018

AbstractThe main aim of this paper is to advance, clarify, and defend a definition of relativism. On the definition, relativism does not contrast with absolutism, is not the same as pluralism, contrasts with universalism and nihilism, and is compatible with both moral objectivity and moral subjectivity. Advantages of the definition are noted, but the bulk of the paper is devoted to detailed discussions of the concepts that figure in the definition or are entailed by it. Such concepts include those of a moral code, of conflict between moral codes, and of a convention.
Shifts in positive and negative psychotic symptoms and anger: effects on violence
Authors: Coid Jeremy W. , Kallis Constantinos , Doyle Mike , Shaw Jenny , Ullrich Simone 
Published: February 2018

BackgroundChanges in positive and negative symptom profiles during acute psychotic episodes may be key drivers in the pathway to violence. Acute episodes are often preceded by fluctuations in affect before psychotic symptoms appear and affective symptoms may play a more important role in the pathway than previously recognised.MethodsWe carried out a prospective cohort study of 409 male and female patients discharged from medium secure services in England and Wales to the community. Measures were taken at baseline (pre-discharge), 6 and 12 months post-discharge using the Positive and Negative Syndrome Scale. Information on violence was obtained using the McArthur Community Violence Instrument and Police National Computer.ResultsThe larger the shift in positive symptoms the more likely violence occurred in each 6-month period. However, shifts in angry affect were the main driving factor for positive symptom shifts associated with violence. Shifts in negative symptoms co-occurred with positive and conveyed protective effects, but these were overcome by co-occurring shifts in anger. Severe but stable delusions were independently associated with violence.ConclusionsIntensification of angry affect during acute episodes of psychosis indicates the need for interventions to prevent violence and is a key driver of associated positive symptoms in the pathway to violence. Protective effects against violence exerted by negative symptoms are not clinically observable during symptom shifts because they are overcome by co-occurring anger.
IMPORTANCE OF CONTEXTUAL DATA IN PRODUCING HEALTH TECHNOLOGY ASSESSMENT RECOMMENDATIONS: A CASE STUDY
Authors: Poder Thomas G. , Bellemare Christian A. 
Published: February 2018

Objectives:Contextual data and local expertise are important sources of data that cannot be ignored in hospital-based health technology assessment (HTA) processes. Despite a lack of or unconvincing evidence in the scientific literature, technology can be recommended in a given context. We illustrate this using a case study regarding biplane angiography for vascular neurointervention.Methods:A systematic literature review was conducted, along with an analysis of the context in our setting. The outcomes of interest were radiation doses, clinical complications, procedure times, purchase cost, impact on teaching program, the confidence of clinicians in the technology, quality of care, accessibility, and the volume of activity. A committee comprising managers, clinical experts, physicians, physicists and HTA experts was created to produce a recommendation regarding biplane technology acquisition to replace a monoplane device.Results:The systematic literature review yielded nine eligible articles for analysis. Despite a very low level of evidence in the literature, the biplane system appears to reduce ionizing radiation and medical complications, as well as shorten procedure time. Contextual data indicated that the biplane system could improve operator confidence, which could translate into reduced risk, particularly for complex procedures. In addition, the biplane system can support our institution in its advanced procedures teaching program.Conclusions:Given the advantages provided by the biplane technology in our setting, the committee has recommended its acquisition. Contextual data were of utmost importance in this recommendation. Moreover, this technology should be implemented alongside a responsibility to collect outcome data to optimize clinical protocol in the doses of ionizing delivered.
Early Effects of Ionizing Radiation on the Collagen Hierarchical Structure of Bladder and Rectum Visualized by Atomic Force Microscopy
Authors: Kotova Svetlana L. , Timashev Peter S. , Belkova Galina V. , Kochueva Marina V. , Babak Ksenia V. , Timofeeva Victoria A. , Kiseleva Elena B. , Vasilieva Olga O. , Maslennikova Anna V. , Solovieva Anna B. 
Published: February 2018

AbstractRadiation therapy, widely used in the treatment of a variety of malignancies in the pelvic area, is associated with inevitable damage to the surrounding healthy tissues. We have applied atomic force microscopy (AFM) to track the early damaging effects of ionizing radiation on the collagen structures in the experimental animals’ bladder and rectum. The first signs of the low-dose radiation (2 Gy) effect were detected by AFM as early as 1 week postirradiation. The observed changes were consistent with initial radiation destruction of the protein matrix. The alterations in the collagen fibers’ packing 1 month postirradiation were indicative of the onset of fibrotic processes. The destructive effect of higher radiation doses was probed 1 day posttreatment. The severity of the radiation damage was proportional to the dose, from relatively minor changes in the collagen packing at 8 Gy to the growing collagen matrix destruction at higher doses and complete three-dimensional collagen network restructuring towards fibrotic-type architecture at the dose of 22 Gy. The AFM study appeared superior to the optical microscopy-based studies in its sensitivity to early radiation damage of tissues, providing valuable additional information on the onset and development of the collagen matrix destruction and remodeling.
Sensitivity and Likelihood of Residual Herbicide Carryover to Cover Crops
Authors: Palhano Matheus G. , Norsworthy Jason K. , Barber Tom 
Published: February 2018

AbstractResearch was conducted to evaluate the sensitivity of cover crops to a low rate of soil-applied herbicides and investigate the likelihood of herbicide carryover to fall-seeded cover crops following an irrigated corn crop. In the sensitivity study, herbicides were applied at a 1/16×rate (to simulate four half-lives) 1 d after cover crop planting, whereas for the carryover study residual herbicides were applied at a 2×rate at the maximum label corn height or growth stage and cover crops sown immediately after corn harvest. In the sensitivity experiment, atrazine, diuron, fluridone, fomesafen, metribuzin, pyrithiobac, and sulfentrazone reduced emergence of the leguminous cover crops Austrian winterpea, crimson clover, and hairy vetch. However, reduced biomass production of leguminous cover crops in the spring was only observed for atrazine, fluridone, and pyrithiobac. For rapeseed, atrazine, flumioxazin, fluridone, pyrithiobac, pyroxasulfone, sulfentrazone, and tembotrione reduced emergence, but biomass production was reduced only by atrazine and fluridone. Conversely, wheat, cereal rye, barley, oats, and triticale were not affected by soil-applied herbicides. Barley was the only cereal cover crop that showed biomass reduction due to the application of flumioxazin, fluridone, mesotrione,S-metalochlor, and sulfentrazone. In the carryover study, with the exception of crimson clover, Austrian winterpea, cereal rye, hairy vetch, rapeseed, and wheat showed no negative affect on biomass production following a 2×rate of postemergence-applied residual herbicide in corn.
AGO1 may influence the prognosis of hepatocellular carcinoma through TGF-β pathway
Authors: Wang Miao , Zhang Lyu , Liu Zeyang , Zhou Jiamin , Pan Qi , Fan Jia , Zang Rongyu , Wang Lu 
Published: February 2018

AbstractAGO1 is a major component of RNA-induced silencing complexes and plays a crucial role in solid tumors. The aim of our study was to investigate AGO1 functions in hepatocellular carcinoma (HCC). Using small interfering RNA, AGO1 functions were investigated in HCCLM3 cell lines. Cell proliferation, immigration, and invasion significantly decreased after AGO1 depletion using MTT, wound-healing, and transwell assay. The associated proteins in the epithelial–mesenchymal transition (EMT) and the activation of its signal pathways were measured using western blot. After AGO1 depleted, increased E-cadherin and decreased N-cadherin, Vimentin, Snail, and Zeb1 were founded. In its upstream pathway, the phosphorylation of ERK1/2(Thr202/Tyr204), Smad2(S425/250/255), and Smad4 were significantly inhibited. Meanwhile, inhibitor of ERK1/2(LY3214996) significantly inhibited the growth and migration of the AGO1 cells. The nuclear importing of Smad4 was blocked and furthermore, the transcription of Snail was also influenced for the decrease of combination between Smad4 and the promotor region of Snail. After Snail was overexpressed, the invasion of HCCLM3 cells was significantly rescued. Immunohistochemistry in tissue microarrays consisting of 200 HCC patients was used to analyze the associations between AGO1 expression and prognosis. Intratumoral AGO1 expression was an independent risk factor for overall survival (P = 0.008) and recurrence-free survival (P < 0.001). In conclusion, AGO1 may promote HCC metastasis through TGF-β pathway, and AGO1 may be a reliable prognostic factor in HCC.