bluuebunny/crossref_metadata_2025_split huggingface dataset:
Wave turbulence in a rotating channel
Authors: Scott Julian F. 
Published: February 2014

AbstractThis paper describes wave-turbulence closure and its consequences for rapidly rotating (i.e. small Rossby number) turbulence confined by two infinite, parallel walls perpendicular to the rotation axis. Expressing the flow as a combination of inertial waveguide modes leads to a spectral matrix, whose diagonal elements express the distribution of energy over modes and whose off-diagonal elements represent correlations between modes of different orders. In preparation for wave-turbulence closure, the flow is decomposed into two-dimensional and wave components. The former is found to evolve as if it were a classical, two-dimensional, non-rotating flow, but with wall friction due to Ekman pumping by the boundary layers. Evolution equations for the wave-component elements of the spectral matrix are derived using a wave-turbulence approach. Detailed analysis of these equations shows that, surprisingly, the two-dimensional component has no effect on wave-component energetics. As expected for wave turbulence, energy transfer between wave modes is via resonant triads and takes place at times $O(\varepsilon ^{-2})$ multiples of the rotational period, where $\varepsilon $ is the Rossby number. Despite playing no role in wave-mode energetics, the two-dimensional component produces decay of the off-diagonal elements of the spectral matrix on a time scale that is small compared with $O(\varepsilon ^{-2})$ rotation periods. There are thus three asymptotically distinct stages in the evolution of the turbulence in the limit of small Rossby number: the two-dimensional flow begins to evolve at the usual large-eddy turnover time scale ($O(\varepsilon ^{-1})$ multiples of the rotation period) and continues to develop thereafter. This is followed by decorrelation of different wave orders and finally evolution of the wave energy spectra due to resonant interactions.
Plasma alkylresorcinol concentrations, biomarkers of whole-grain wheat and rye intake, in the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort
Authors: Kyrø Cecilie , Olsen Anja , Bueno-de-Mesquita H. B(as). , Skeie Guri , Loft Steffen , Åman Per , Leenders Max , Dik Vincent K. , Siersema Peter D. , Pischon Tobias , Christensen Jane , Overvad Kim , Boutron-Ruault Marie-Christine , Fagherazzi Guy , Cottet Vanessa , Kühn Tilman , Chang-Claude Jenny , Boeing Heiner , Trichopoulou Antonia , Naska Androniki , Oikonomidou Despoina , Masala Giovanna , Pala Valeria , Tumino Rosario , Vineis Paolo , Mattiello Amalia , Peeters Petra H. , Bakken Toril , Weiderpass Elisabete , Åsli Lene Angell , Sánchez Soledad , Jakszyn Paula , Sánchez María-José , Amiano Pilar , Huerta José María , Barricarte Aurelio , Ljuslinder Ingrid , Palmqvist Richard , Khaw Kay-Tee , Wareham Nick , Key Timothy J. , Travis Ruth C. , Slimani Nadia , Freisling Heinz , Ferrari Pietro , Gunter Marc J. , Murphy Neil , Riboli Elio , Tjønneland Anne , Landberg Rikard 
Published: February 2014

Whole-grain intake has been reported to be associated with a lower risk of several lifestyle-related diseases such as type 2 diabetes, CVD and some types of cancers. As measurement errors in self-reported whole-grain intake assessments can be substantial, dietary biomarkers are relevant to be used as complementary tools for dietary intake assessment. Alkylresorcinols (AR) are phenolic lipids found almost exclusively in whole-grain wheat and rye products among the commonly consumed foods and are considered as valid biomarkers of the intake of these products. In the present study, we analysed the plasma concentrations of five AR homologues in 2845 participants from ten European countries from a nested case–control study in the European Prospective Investigation into Cancer and Nutrition. High concentrations of plasma total AR were found in participants from Scandinavia and Central Europe and lower concentrations in those from the Mediterranean countries. The geometric mean plasma total AR concentrations were between 35 and 41 nmol/l in samples drawn from fasting participants in the Central European and Scandinavian countries and below 23 nmol/l in those of participants from the Mediterranean countries. The whole-grain source (wheat or rye) could be determined using the ratio of two of the homologues. The main source was wheat in Greece, Italy, the Netherlands and the UK, whereas rye was also consumed in considerable amounts in Germany, Denmark and Sweden. The present study demonstrates a considerable variation in the plasma concentrations of total AR and concentrations of AR homologues across ten European countries, reflecting both quantitative and qualitative differences in the intake of whole-grain wheat and rye.
Insect emergence in relation to floods in wet meadows and swamps in the River Dalälven floodplain
Authors: Vinnersten T.Z. Persson , Östman Ö. , Schäfer M.L. , Lundström J.O. 
Published: February 2014

AbstractAnnual variation in flood frequency and hydroperiod during the vegetation season has ecological impacts on the floodplain biota. Although many insect groups may have a lower emergence during a flood event, it is poorly known how annual emergence of insects in temporary wetlands is related to the variation in hydrology. Between May and September, we studied the weekly emergence of 18 insect taxa over six consecutive years, 2002–2007, in six temporary flooded wetlands (four wet meadows and two forest swamps) in the River Dalälven floodplains, Central Sweden. We used emergence traps to collect emerging insects from terrestrial and aquatic parts of wet meadows and swamp forests. In all wetlands, the insect fauna was numerically dominated by the orders Diptera, Hymenoptera, Coleoptera and Homoptera. On a weekly basis, 9 out of the 18 insect taxa had lower emergence in weeks with flood than in weeks with no flood, whereas no taxon had a higher emergence in weeks with flood. Over the seasons, we related insect emergence to seasonal flood frequency and length of hydroperiod. The emergence of most studied taxa decreased with increasing hydroperiod, which suggests that emergence after floods do not compensate for the reduced emergence during floods. Only Culicidae and the aquatic Chironomidae sub-families Tanypodinae and Chironominae showed an increase in emergence with increasing hydroperiod, whereas Staphylinidae peaked at intermediate hydroperiod. We conclude that a hydroperiod covering up to 40% of the vegetation season has a significant negative effect on the emergence of most taxa and that only a few taxa occurring in the temporary wetlands are actually favoured by a flood regime with recurrent and unpredictable floods.
Effects of reproductive interference on the competitive displacement between two invasive whiteflies
Authors: Sun Di-Bing , Li Jie , Liu Yin-Quan , Crowder David W. , Liu Shu-Sheng 
Published: February 2014

AbstractReproductive interference is one of the major factors mediating species exclusion among insects. The cryptic species Middle East-Asia Minor 1 (MEAM1) and Mediterranean (MED) of the whitefly Bemisia tabaci complex have invaded many parts of the world and often exhibit niche overlap and reproductive interference. However, contrasting patterns of competitive displacement between the two invaders have been observed between regions such as those in USA and China. Understanding the roles of reproductive interference in competitive interactions between populations of the two species in different regions will help unravel other factors related to their invasion. We integrated laboratory population experiments, behavioural observations and simulation modelling to investigate the role of reproductive interference on species exclusion between MEAM1 and MED in China. In mixed cohorts of the two species MEAM1 always excluded MED in a few generations when the initial proportion of MEAM1 was ⩾0.25. Even when the initial proportion of MEAM1 was only 0.10, however, MEAM1 still had a higher probability of excluding MED than that for MED to exclude MEAM1. Importantly, we show that as MEAM1 increased in relative abundance, MED populations became increasingly male-biased. Detailed behavioural observations confirmed that MEAM1 showed a stronger reproductive interference than MED, leading to reduced frequency of copulation and female progeny production in MED. Using simulation modelling, we linked our behavioural observations with exclusion experiments to show that interspecific asymmetric reproductive interference predicts the rate of species exclusion of MED by MEAM1. These findings not only reveal the importance of reproductive interference in the competitive interactions between the two invasive whiteflies as well as the detailed behavioural mechanisms, but also provide a valuable framework against which the effects of other factors mediating species exclusion can be explored.
Assessment of DNA damage using cytokinesis-block micronucleus cytome assay in lymphocytes of dilated cardiomyopathy patients
Authors: SITARAMAN SNEHA , BABU K. THIRUMAL , BADARINATH ARS , PAZHANIMUTHU A , SARASWATHY RADHA 
Published: February 2014

SummaryStudies on the extent of DNA damage are undertaken to elucidate the nature and causes of genomic instability in any syndrome or disease progression in human. In this study, cytokinesis-block micronucleus cytome (CBMN Cyt) assay was employed to evaluate the extent of chromosomal instability or DNA damage in lymphocytes of patients suffering from dilated cardiomyopathy (DCM), a serious cardiac muscle disorder. Effect of DNA damage on the disease was also assessed by analysis of mutations in cardiac Troponin C type I (TNNC1) gene. Blood samples were collected from 48 DCM patients and 48 age- and sex-matched controls from Vellore region of South India. Significantly high frequencies of micronuclei (MNi) and genomic damage such as nuclear buds (NBUDs) and nucleoplasmic bridges (NPBs) were observed in the patient group as compared with the control group (P < 0·001). Molecular analysis revealed that no mutations were found in the TNNC1 gene. It was observed that although there was a high frequency of DNA damage in the lymphocytes of the patients, no correlation between severity of the phenotype and the frequencies of MNi, NPBs and NBUDS could be established. Our study appears to be the first one in which chromosomal instability was estimated using CBMN Cyt assay for DCM patients. Studies with a larger population size may help in validating the use of genetic markers for establishing frequencies and type of DNA damage in DCM. It will also help in understanding the effect of DNA damage on this disease.
Prevalence and characteristics of diagnostic groups amongst 1034 patients seen in ENT practices for dizziness
Authors: Lüscher M , Theilgaard S , Edholm B 
Published: February 2014

AbstractObjective:To determine the prevalence and characteristics of various diagnostic groups amongst patients referred to ENT practices with the primary complaint of dizziness.Study design:A prospective, observational, multicentre study.Methods:Consecutive patients presenting with dizziness to the participating ENT practices were enrolled. Seven ENT specialists at three clinics participated.Results:Benign paroxysmal positional vertigo was diagnosed in 53.3 per cent of the 1034 study patients. Fifty-nine per cent of these experienced night-time awakening with dizziness, which was a significant proportion in comparison to the other diagnostic groups. Benign paroxysmal positional vertigo was the most frequent diagnosis in all age groups, including those over 70 years.Conclusion:In this study of patients referred to ENT for dizziness, benign paroxysmal positional vertigo was the dominant diagnostic entity, in all age groups and overall. All clinicians in contact with dizzy patients must consider benign paroxysmal positional vertigo, especially in the elderly.
Throwing Snowballs in France: Muslimsipahisof the Indian Army and Sheikh Ahmad's dream, 1915–1918
Authors: SINGH GAJENDRA 
Published: February 2014

AbstractThe arrival of Indiansipahis(or ‘sepoys’) to fight alongside soldiers of the British Expeditionary Force in France in October 1914 was both a victory and a source of concern for the British Raj. It proved to be the zenith of martial race fantasies that had been carefully codified from the 1890s, and birthed fears about the effects that Europe and the rapidly intensifying conflict on the Western Front would have upon the ‘best black troops in the world’. The situation resulted in the appointment of a special military censor to examine the letters sent to and from Indiansipahisand compile a fortnightly summary of Indian letters from France for the duration of the First World War. This paper investigates a portion of the letters contained in these reports. More particularly, it investigates the life of a single chain letter and the effect its chiliastic message had upon Muslim troops of the Indian Army during the First World War. As the letter was read, rewritten, and passed on, it served as a rejoinder to missionary efforts by theAhmadiyyaMovement, reinterpreted as a call for soldiers to purify their own bodies and oppose interracial sexual relationships, before, finally, being used as a critique of the British war effort against the Ottoman empire.
The role of elephantLoxodonta africanapathways as a spatial variable in crop-raiding location
Authors: Von Gerhardt K. , Van Niekerk A. , Kidd M. , Samways M. , Hanks J. 
Published: February 2014

AbstractShort-range elephantLoxodonta africanamovements were examined in a heterogeneous landscape mosaic of settlements, crop fields and remnant forest in the Caprivi Strip, Namibia. We explored the penetration of the landscape through the use of permanent pathways and determined the impact of pathway use on crop-raiding location. Pathways were linear, devoid of vegetation and maintained by repeated movement. Functional connectivity of pathways was not species-specific, and pathways were used by various species. Elephants travelled in single file at night and we recorded selective pathway use: females selected pathways away from settlements to access water, whereas males used pathways among settlements to launch crop raids. Proximity of raided fields to the nearest pathway was the only significant spatial variable explaining crop-raiding location. Bulls were responsible for all crop-raiding incidents. We conclude that (1) pathways were the most significant spatial variable influencing which fields were raided, (2) crop-raiding from pathways may maximize foraging efficiency by reducing time spent and distance travelled while foraging, (3) pathways may facilitate penetration of the matrix by connecting predictable resources (crops) with preferred shelter areas, crossing points at roads and preferred drinking spots, and (4) access to the Kwandu River is restricted by settlements, predictably resulting in human–elephant conflict. By highlighting the relevance of pathways for movement of elephants we show that an understanding of the use of pathways is important for land-use planning in conservation landscapes, specifically with regard to human–elephant conflict. We also argue for the need to more fully explore pathway occurrence and use at larger spatial scales.
Accounting for the low survival of the Critically Endangered northern bald ibisGeronticus eremitaon a major migratory flyway
Authors: Serra G. , Lindsell J. A. , Peske L. , Fritz J. , Bowden C. G. R. , Bruschini C. , Welch G. , Tavares J. , Wondafrash M. 
Published: February 2014

AbstractThe poor survival rate of immature northern bald ibisesGeronticus eremitaduring their first years spent outside the natal site is driving the last known wild colony of the migratory eastern population to extinction. To inform emergency conservation action for this Critically Endangered species we investigated the distribution range and behaviour of immature birds in passage and wintering areas, and the threats to which they are subject. We integrated recent satellite telemetry data with visual observations spanning 130 years. We assessed threats across the range, using satellite tracking and field surveys. Our results show that during the years before they return to the natal site in Syria, immature northern bald ibises reside away from the recently identified adult wintering site in the central Ethiopian highlands. They occur mainly across the northernmost 70–80% of the adult migratory range. Historical records suggest that immature birds spend more time along the western Arabian Peninsula now than in the past. This range shift exposes them for longer periods to threats, such as hunting and electrocution on power lines, which are absent from the wintering site used by adult birds. We suggest that other threatened and declining bird species sharing the same flyway probably face the same threats during migration.
searchUCSG: a fast coalition structure search algorithm for modular robot reconfiguration under uncertainty
Authors: Dutta Ayan , Dasgupta Prithviraj , Baca José , Nelson Carl 
Published: February 2014

SUMMARYWe consider the problem of dynamic reconfiguration by modular self-reconfigurable robots (MSRs) in the presence of uncertainty in their motion and the environment. Specifically, we consider the situation where the MSR is unable to continue its motion in its current configuration and needs to identify a new configuration among the existing modules, which would be the most configuration suitable for performing the robot's assigned task under the current circumstances. To address this problem, we propose a new data structure called an uncertain coalition structure graph (UCSG) that accommodates uncertainty in the MSR's motion and the environment, using a framework from cooperative game theory called the coalition structure graph. We then propose a new search algorithm calledsearchUCSGthat intelligently prunes nodes from the UCSG using a modified branch-and-bound technique. We have shown analytically that our algorithm is anytime, that is, if it terminates arbitrarily, it returns the best solution found thus far, which is guaranteed to be within a constant bound from the optimal solution. We have verified the performance of our algorithm experimentally in simulation and shown that it is able to find a solution that is within the worst bound of 80% of the optimal solution while exploring only half of the nodes in the UCSG. Our algorithm also takes lesser computation time than the existing algorithms (that do not model uncertainty) for solving similar problems. Finally, to verify the operation of our algorithm, we have implemented it to partition a set of mobile e-puck robots into clusters and shown how different number of robots and different robot motion uncertainty parameters affect the formed clusters.
Mechanical models and the mobility of robots and mechanisms
Authors: Talabă Doru 
Published: February 2014

SUMMARYMobility is a fundamental parameter of mechanisms expressing in a qualitative manner their kinematic and dynamic properties. The mobility formulae presented in literature take into consideration some of the structural entities, such as bodies, joints, constraints, closed loops, and space characteristics; however, the specific mechanical model that has traditionally been at the origin of the mobility criteria themselves is incompletely specified and, even then, only implicitly. In this paper, we propose a classification of the mobility criteria based on the known dynamic models. While all known mobility criteria have been associated with a specific dynamic model, some particular, less used dynamic models (like natural coordinates and multi-particle models) suggested new mobility criteria models. The associated mechanical model for each category of mobility criteria allows a qualitative assessment of the kinematic and dynamic sets of equations to be formulated in later stages of analysis. A simple multi-loop mechanism is taken as an example just to illustrate the mobility calculation and qualitative assessment of the kinematic and dynamic models in each case. Based on the proposed classification of the mobility formulae, an assessment is made with particular regard to their applicability to overconstrained mechanisms.
Geographical diversity in seasonality of major diarrhoeal pathogens in Bangladesh observed between 2010 and 2012
Authors: DAS S. K. , BEGUM D. , AHMED S. , FERDOUS F. , FARZANA F. D. , CHISTI M. J. , LATHAM J. R. , TALUKDER K. A. , RAHMAN M. M. , BEGUM Y. A. , FARUQUE A. S. G. , MALEK M. A. , QADRI F. , AHMED T. , ALAM N. 
Published: February 2014

SUMMARYThe study aimed to determine the geographical diversity in seasonality of major diarrhoeal pathogens among 21 138 patients enrolled between 2010 and 2012 in two urban and two rural sites in Bangladesh under the surveillance system of the International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b). Distinct patterns in seasonality were found for rotavirus diarrhoea which peaked in winter across the sites (December and January) and dipped during the rainy season (May) in urban Dhaka, August in Mirpur and July in Matlab, equated by time-series analysis using quasi-Poisson regression model. Significant seasonality for shigellosis was observed in Dhaka and rural Mirzapur. Cholera had robust seasonality in Dhaka and Matlab in the hot and rainy seasons. For enterotoxogenicEscherichia coli(ETEC) diarrhoea, clearly defined seasonality was observed in Dhaka (summer). Understanding the seasonality of such pathogens can improve case management with appropriate therapy, allowing policy-makers to identify periods of high disease burden.
Locating an ice-covered Antarctic landfill using ground magnetometry
Authors: Freidman Benjamin L. , Camenzuli Danielle , Lackie Mark 
Published: February 2014

AbstractAt former Antarctic research stations, legacy waste often remainsin situand concealed by ice. Consequently, the location, characteristics and potential environmental impact associated with legacy waste remains poorly documented. This study applies ground magnetometry to map the spatial extent of the landfill at the abandoned Wilkes Station. Magnetic anomalies indicate that the landfill extends north-west to south-east and is close to, and perhaps prograding into, the ocean. The landfill is characterized by large magnetic variations of > 1500 nT with asymmetrical magnetic anomalies which suggest variable orientations of material and random dumping. Magnetic susceptibilities > 0.02SI units beyond the landfill area reveal elevated magnetic properties of the basement geology. However, a contrast in anomaly shape reliably distinguishes large anomalies generated by landfill material. Surface and subsurface melt streams (observed at the shoreline) flowing from the survey area suggest elevated potential for metal contamination of the nearshore and marine environment. The survey demonstrates a cost-effective and non-invasive method for gathering information to guide the clean up of landfills beneath ice.
Partially Observed Boolean Sequences and Noise Sensitivity
Authors: AHLBERG DANIEL 
Published: February 2014

Let ${\mathcal H}$ denote a collection of subsets of {1,2,. . .,n}, and assign independent random variables uniformly distributed over [0,1] to the n elements. Declare an element p-present if its corresponding value is at most p. In this paper, we quantify how much the observation of the r-present (r>p) set of elements affects the probability that the set of p-present elements is contained in ${\mathcal H}$. In the context of percolation, we find that this question is closely linked to the near-critical regime. As a consequence, we show that for every r>1/2, bond percolation on the subgraph of the square lattice given by the set of r-present edges is almost surely noise sensitive at criticality, thus generalizing a result due to Benjamini, Kalai and Schramm.