bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cost‐efficient and network‐aware dynamic repartitioning‐based algorithms for scheduling large‐scale graphs in cloud computing environments
Authors: Heidari Safiollah , Buyya Rajkumar 
Published: July 2018

SummaryLarge amount of data that is generated by Internet and enterprize applications are stored in the form of graphs. Graph processing systems are broadly used in enterprizes to process such data. With the rapid growth in mobile and social applications and complicated connections of Internet websites, massive concurrent operations need to be handled. On the other hand, the intrinsic structure and the size of real‐world graphs make distributed processing of graphs more challenging. Low balanced communication and computation, low preprocessing overhead, low memory footprint, and scalability should be offered by distributed graph analytics frameworks. Moreover, the effects of network factors such as bandwidth and traffic as well as monetary cost of processing such large‐scale graphs and the mutual impact of these elements have been less studied. To address these issues, we proposed two dynamic repartitioning algorithms that consider network factors, affecting public cloud environments to decrease the monetary cost of processing. A new classification of graph algorithms and processing is also introduced, which will be used to choose the best strategy for processing at any operation. We plugged these algorithms to our extended graph processing system (iGiraph) and compared them with those supported in other graph processing systems such as Giraph and Surfer on Australian National Cloud Infrastructure. We observed that up to 30% faster execution time, up to 50% network traffic decline, and more than 50% cost reduction are achieved by our algorithms compared to a framework such as the popular Giraph.
Can we observe fuzzballs or firewalls?
Authors: Guo Bin , Hampton Shaun , Mathur Samir D. 
Published: July 2018

Abstract

In the fuzzball paradigm the information paradox is resolved because the black hole is replaced by an object with no horizon. One may therefore ask if observations can distinguish a traditional hole from a fuzzball. We give arguments for why the fuzzball structure should lie close to the horizon; i.e., it should be a ‘tight’ fuzzball. We find: (a) It is very difficult to reflect quanta off the surface of such a fuzzball, mainly because geodesics starting near the horizon radius cannot escape to infinity unless their starting direction is very close to radial. (b) If infalling particles interact with the emerging radiation before they are engulfed by the horizon, then we say that we have a ‘firewall behavior’. We consider several types of interactions, but find no evidence for firewall behavior in any theory that obeys causality. (c) Photons with wavelengths larger than the black hole radius can be
scattered off the emerging radiation, but a very small fraction of the backscattered photons will be able to escape back to infinity.
Understanding and Practices of Gynaecologists Related to Breast Cancer Screening, Detection, Treatment and Common Breast Diseases: A Study from India
Authors: Singh Gitika N. , Agarwal Aastha , Jain Vinod , Kumar Priti 
Published: July 2018

AbstractBackgroundThe knowledge of breast cancer risk factors and screening practices in a community is largely influenced by the practising gynaecologist in that area. We assessed the understanding and knowledge of gynaecologists about breast cancer: screening, risk factors, clinical signs, management and common benign breast diseases.MethodologyThis cross‐sectional study was carried out in Uttar Pradesh, India, from April to September 2017. One hundred and fifty‐two gynaecologists were assessed using a self‐designed and validated questionnaire to assess the knowledge of risk factors, clinical signs, screening practices and management of breast cancer as well as common benign breast diseases. Further, the results were compared based on their education: undergraduates (UGs; no residency experience in obstetrics and gynaecology) versus postgraduates (PGs; residency experience in obstetrics and gynaecology).Results67 and 82.2% of gynaecologists possess excellent to very good knowledge of risk factors and clinical signs of breast cancer, respectively. The knowledge of PGs seems to be better than UGs (p < 0.01). 84.9% participants were aware that breast cancer screening decreases breast cancer‐related mortality, and 61.2% considered CBE as most relevant screening investigation (66.1% PGs and 41.9% UGs; p = 0.04). 30.2% regularly offer breast cancer screening at their centre. 58.5% did not consider screening mammography as cost‐effective for their patients (57.9% PGs and 61.3% UGs; p = 0.72), and 41.4% considered it to be a time‐consuming process (39.7% PGs and 48.4% UGs; p = 0.38). 99.3% like to follow up a patient with familial breast cancer by themselves, and 0.7% like to refer them to specialist. 51.9% gynaecologists were convinced of breast conservation surgery (BCS) as a surgical option, however 51.3% feared leaving diseased breast behind.ConclusionDespite the knowledge regarding risk factors, clinical signs and treatment of breast cancer and benign breast diseases was found adequate amongst the gynaecologists, this did not apply to their clinical practice. Structured and continuous training of gynaecologists is needed to improve the outcome of patients with breast diseases in terms of better management and reference.
Paediatric Osteomyelitis in Fiji
Authors: Munshi Basharat , MacFater Wiremu , Hill Andrew G. , McCaig Eddie H. 
Published: July 2018

AbstractIntroductionOsteomyelitis can lead to significant morbidity and long‐term disability if early treatment is not initiated in a timely manner. For developing countries this can lead to a significant burden on the healthcare system. This study aims to describe the demographic variables, aetiology and outcomes of treatment and to calculate the incidence of paediatric osteomyelitis in Fiji. The micro‐organism profile and the outcomes for treatment were analysed.MethodsThis is a retrospective review of medical records of all paediatric patients presenting to hospitals in Fiji over a 5‐year period (2006–2010) with a diagnosis of osteomyelitis. Data were collected from the three divisional hospitals in Fiji (Colonial War Memorial Hospital, Lautoka Hospital and Labasa Hospital).ResultsTwo hundred and twenty patients were identified. An annual incidence of 18.1 cases/100,000 paediatric population was identified. The highest incidence was in the itaukei (ethnic Fijian) population (21 cases/100,000). Males were at a higher risk of developing osteomyelitis (20.8/105 vs. 10.7/105). Staphylococcus Aureus was identified in 86% of all positive blood and 81% of all positive pus cultures, and it was sensitive to cloxacillin in 100% of cases. The most common factor identified preceding the development of osteomyelitis was trauma (55%) followed by skin sepsis (32%). Fifty‐four per cent of the cases had chronic osteomyelitis, and the most common mode of presentation was in the form of an abscess (48%) followed by sinus/sequestrum (24%). The age group most commonly affected was between 5 and 9 years of age (19.6/105). Children with chronic osteomyelitis were more likely to require operative intervention in addition to antibiotics as compared to acute osteomyelitis (85 vs. 24%). The success rate of treating acute osteomyelitis was 92% compared to 61% for chronic osteomyelitis.ConclusionPaediatric osteomyelitis poses a significant problem in Fiji, especially in the male, ethnic Fijian population between 5 and 9 years of age. The chance of complete resolution after treatment of acute osteomyelitis is very good. Therefore, interventions aimed at early diagnosis and treatments are required.
Assessment of adolescent optimism: Measurement invariance across gender and race/ethnicity
Authors: Webber Kristina C. , Smokowski Paul R. 
Published: July 2018

ABSTRACTIntroductionOptimism is viewed as an important resource for resilience and is associated with various wellbeing outcomes, yet few measures of optimism have been validated for use with adolescents. The aim of this study was to (a) test the factor structure invariance of the School Success Profile Success Orientation scale across gender and four racial/ethnic groups and (b) estimate group‐level differences in optimism.MethodsData from a diverse sample of adolescents (N = 2063; mean 12.3 years; 52% female) from the southeastern United States were examined using multiple‐group confirmatory factor analysis. Models for configural, metric, and scalar invariance were tested using WLSMV estimation in Mplus.ResultsConfirmatory factor analysis supported the hypothesized one‐factor model and indicated scalar invariance across gender and the four racial/ethnic (i.e., African American, Caucasian, Hispanic/Latino, Native American) groups. Cross‐group comparisons of latent factor means indicated statistically significant differences in self‐reported optimism. Female respondents reported higher optimism than males. Among the four racial/ethnic groups, African American youth reported the highest optimism levels. Native American youth reported higher optimism than Caucasian and Hispanic/Latino youth.ConclusionsResults suggest the Success Orientation scale is appropriate for many assessment and evaluation purposes, including the assessment of optimism across gender and race/ethnicity and the investigation of substantive questions regarding cross‐cultural differences in adolescents' expectations of the future.
Interactions between eye movements and posture in children with neurodevelopmental disorders
Authors: Bucci Maria Pia , Goulème Nathalie , Dehouck Delphine , Stordeur Coline , Acquaviva Eric , Septier Mathilde , Lefebvre Aline , Gerard Christophe‐Loïc , Peyre Hugo , Delorme Richard 
Published: July 2018

AbstractIn everyday life, our activities frequently involve the simultaneous performance of two or more tasks. Sharing attention between two concurrent tasks may result in a decrease in performance specifically among children with neurodevelopmental disorders. The objective of the study was to determine whether the influence of postural conditions (sitting condition, single task; standing condition, dual task) on eye movement performances on three visual tasks with high attentional load (visually‐guided saccade task, memory‐guided saccade task and fixation task) was different in children with neurodevelopmental disorders (attention deficit and hyperactive disorder, dyslexia, and high functioning autism spectrum disorder) when compared to typically developing children. One hundred and four children (26 per group, sex‐age‐ and IQ‐matched groups) were evaluated. We found that for the fixation task only, the three groups of children with neurodevelopmental disorders had poorer eye movements performances in the standing condition compared to the sitting condition while no such difference was found for typically developing children. We suggest that children with neurodevelopmental disorders have fewer attentional resources available for performing correctly oculomotor tasks with high attentional load leading to impairment of these tasks for maintaining a good level of postural stability.
How to Podcast in Archaeology
Authors: Amundsen Colin P. , Belmonte Cristina 
Published: July 2018

ABSTRACTThe problem for archaeologists doing public outreach could be that we do not know who our audience is. Marketing to just the public at large is an extremely broad approach filled with the pitfalls of not engaging enough of the public, so it might be necessary to first find out who within the general public would have the most interest in your discovery and then tailor your presentation to that audience. At the podcast Cooking with Archaeologists we are using digital media, social media marketing, and our experience from the business world to do just that. Podcasting has been a trial-and-error project filled with uncertainty and doubt, and for archaeologists engaged in public archaeology it might be a practical approach to reaching the public and a medium to build an engaged and interested audience. In this “how-to” article, we will reveal what we have learned from this exciting and somewhat demanding venture and suggest how podcasting is a democratizing venture that connects the public to archaeology and the archaeologist.
On concentration properties of partially observed chaotic systems
Authors: Paulin Daniel , Jasra Ajay , Crisan Dan , Beskos Alexandros 
Published: July 2018

AbstractIn this paper we present results on the concentration properties of the smoothing and filtering distributions of some partially observed chaotic dynamical systems. We show that, rather surprisingly, for the geometric model of the Lorenz equations, as well as some other chaotic dynamical systems, the smoothing and filtering distributions do not concentrate around the true position of the signal, as the number of observations tends to ∞. Instead, under various assumptions on the observation noise, we show that the expected value of the diameter of the support of the smoothing and filtering distributions remains lower bounded by a constant multiplied by the standard deviation of the noise, independently of the number of observations. Conversely, under rather general conditions, the diameter of the support of the smoothing and filtering distributions are upper bounded by a constant multiplied by the standard deviation of the noise. To some extent, applications to the three-dimensional Lorenz 63 model and to the Lorenz 96 model of arbitrarily large dimension are considered.
Spectral bounds in random graphs applied to spreading phenomena and percolation
Authors: Lemonnier Rémi , Scaman Kevin , Vayatis Nicolas 
Published: July 2018

Abstract
In this paper we derive nonasymptotic upper bounds for the size of reachable sets in random graphs. These bounds are subject to a phase transition phenomenon triggered by the spectral radius of the hazard matrix, a reweighted version of the adjacency matrix. Such bounds are valid for a large class of random graphs, called local positive correlation (LPC) random graphs, displaying local positive correlation. In particular, in our main result we state that the size of reachable sets in the subcritical regime for LPC random graphs is at most of order O(√n), where n is the size of the network, and of order O(n2/3) in the critical regime, where the epidemic thresholds are driven by the size of the spectral radius of the hazard matrix with respect to 1. As a corollary, we also show that such bounds hold for the size of the giant component in inhomogeneous percolation, the SIR model in epidemiology, as well as for the long-term influence of a node in the independent cascade model.
On mutations in the branching model for multitype populations
Authors: Chaumont Loïc , Nguyen Thi Ngoc Anh 
Published: July 2018

AbstractThe forest of mutations associated to a multitype branching forest is obtained by merging together all vertices in each of its clusters and by preserving connections between them. (Here, by cluster, we mean a maximal connected component of the forest in which all vertices have the same type.) We first show that the forest of mutations of any multitype branching forest is itself a branching forest. Then we give its progeny distribution and we describe some of its crucial properties in terms of the initial progeny distribution. We also obtain the limiting behaviour of the number of mutations both when the total number of individuals tends to ∞ and when the number of roots tends to ∞. The continuous-time case is then investigated by considering multitype branching forests with edge lengths. When mutations are nonreversible, we give a representation of their emergence times which allows us to describe the asymptotic behaviour of the latter, under certain conditions on the mutation rates. These results have potential relevance for emergence of mutations in population cells, particularly for genetic evolution of cancer or development of infectious diseases.
Understanding the Impacts of Maritime Disruption Transportation to Hospital-Based Acute Health Care Supplies and Personnel in Coastal and Geographically Isolated Communities
Authors: Errett Nicole A. , Tanner Alexa , Shen Xuesi , Chang Stephanie E. 
Published: July 2018

ABSTRACTObjectiveThis study aimed to identify maritime transportation disruption impacts on available health care supplies and workers necessary to deliver hospital-based acute health care in geographically isolated communities post-disaster.MethodsSemi-structured interviews were conducted with 25 key informants knowledgeable about the hospital-based acute health care supply chain and workforce emergency management plans and procedures in 2 coastal communities in British Columbia. These locations were accessed primarily through maritime transportation, including one urban center and one smaller, more remote community. Interview transcriptions were thematically analyzed.ResultsCritical vulnerabilities to hospital-based acute health care delivery due to a maritime transportation disruption identified include lack of information about the existing supply chain, lack of formal plans and agreements, and limited local supply storage and workforce capacity. Measures to decrease vulnerability and enhance system capacity can be fostered to enhance acute health care system resilience for these and other geographically isolated communities.ConclusionsA maritime transportation disruption has the potential to impact the availability of hospital-based health care supplies and health care personnel necessary to deliver acute health care in coastal communities post-disaster. Multisector engagement is required to address complex interdependencies and competing priorities in emergency response. Additional research and public-private collaboration is necessary to quantify potential impacts of maritime transportation disruption on the acute health care system. (Disaster Med Public Health Preparedness. 2019;13:440-448)
Recovering a hidden community beyond the Kesten–Stigum threshold in O(|E|log*|V|) time
Authors: Hajek Bruce , Wu Yihong , Xu Jiaming 
Published: July 2018

Abstract
Community detection is considered for a stochastic block model graph of n vertices, with K vertices in the planted community, edge probability p for pairs of vertices both in the community, and edge probability q for other pairs of vertices. The main focus of the paper is on weak recovery of the community based on the graph G, with o(K) misclassified vertices on average, in the sublinear regime n1-o(1) ≤ K ≤ o(n). A critical parameter is the effective signal-to-noise ratio λ = K2(p - q)2 / ((n - K)q), with λ = 1 corresponding to the Kesten–Stigum threshold. We show that a belief propagation (BP) algorithm achieves weak recovery if λ > 1 / e, beyond the Kesten–Stigum threshold by a factor of 1 / e. The BP algorithm only needs to run for log*n + O(1) iterations, with the total time complexity O(|E|log*n), where log*n is the iterated logarithm of n. Conversely, if λ ≤ 1 / e, no local algorithm can asymptotically outperform trivial random guessing. Furthermore, a linear message-passing algorithm that corresponds to applying a power iteration to the nonbacktracking matrix of the graph is shown to attain weak recovery if and only if λ > 1. In addition, the BP algorithm can be combined with a linear-time voting procedure to achieve the information limit of exact recovery (correctly classify all vertices with high probability) for all K ≥ (n / logn) (ρBP + o(1)), where ρBP is a function of p / q.
General drawdown-based de Finetti optimization for spectrally negative Lévy risk processes
Authors: Wang Wenyuan , Zhou Xiaowen 
Published: July 2018

Abstract
For spectrally negative Lévy risk processes we consider a general version of de Finetti's optimal dividend problem in which the ruin time is replaced with a general drawdown time from the running maximum in its value function. We identify a condition under which a barrier dividend strategy is optimal among all admissible strategies if the underlying process does not belong to a small class of compound Poisson processes with drift, for which the take-the-money-and-run dividend strategy is optimal. It generalizes the previous results on dividend optimization from ruin time based to drawdown time based. The associated drawdown functions are discussed in detail for examples of spectrally negative Lévy processes.
Weighted least-squares estimation for the subcritical Heston process
Authors: du Roy de Chaumaray M. 
Published: July 2018

Abstract
We simultaneously estimate the four parameters of a subcritical Heston process. We do not restrict ourselves to the case where the stochastic volatility process never reaches zero. In order to avoid the use of unmanageable stopping times and a natural but intractable estimator, we use a weighted least-squares estimator. We establish strong consistency and asymptotic normality for this estimator. Numerical simulations are also provided, illustrating the favorable performance of our estimation procedure.
On the consistency of the spacings test for multivariate uniformity, including on manifolds
Authors: Henze Norbert 
Published: July 2018

Abstract
We give a simple conceptual proof of the consistency of a test for multivariate uniformity in a bounded set K ⊂ ℝd that is based on the maximal spacing generated by independent and identically distributed points X1, . . ., Xn in K, i.e. the volume of the largest convex set of a given shape that is contained in K and avoids each of these points. Since asymptotic results for the d > 1 case are only availabe under uniformity, a key element of the proof is a suitable coupling. The proof is general enough to cover the case of testing for uniformity on compact Riemannian manifolds with spacings defined by geodesic balls.
Abundance of liana species in an Amazonian forest of Brazil reflects neither adventitious root nor foliar sprout production
Authors: Piovesan Paulo Ricardo Rodrigues , Camargo José Luís Campana , Burnham Robyn Jeanette , Ferraz Isolde Dorothea Kossmann 
Published: July 2018

Abstract:Liana abundance and size have increased in neotropical forests. High vegetative reproductive capacity (clonality) may be the cause of high abundance in some liana species. Correlations between vegetative propagation capacity and (1) relative abundance of liana species, (2) rooting and foliar sprouting potentials of congeneric species, and (3) phylogenetic position were determined. Species selection was based on the relative abundance of lianas in ten 0.5-ha parcels in continuous forest within the Biological Dynamics of Forest Fragments Project (BDFFP), Brazil. Five individuals per species were replicated with seven cuttings per individual. Cuttings placed in moistened sand and coconut fibre were observed for 5 mo in a humid greenhouse. Survival percentage, rooting percentage, potential regeneration index and longest root length were determined per species. The two most abundant species (9.3% and 4.1% relative abundance) had low vegetative regeneration capacity, contrary to expectations. However, a significant, positive relationship between vegetative propagation and relative abundance of liana species whose relative abundances were <4% was found. Congeneric species showed no difference in vegetative propagation between rare and abundant species, except congeners of Machaerium. Vegetative reproductive capacity occurred in all major evolutionary lineages, but was highest in Fabaceae and Bignoniaceae, families of high abundance both locally and broadly across Neotropical forests.