bluuebunny/crossref_metadata_2025 huggingface dataset:
Conflit intra-allemand sous-jacent au conflit franco-allemand : l’exemple de la S.A.C.M. (1914-1918) ?
Authors: Jeanvoine Luc
Published: May 2017

L’affaire de Graffenstaden (1912) peut être perçue comme un élément de tension supplémentaire entre la France et l’Allemagne menant à l’éclate­ment de la Première Guerre mondiale. Mais un second conflit se surimpose au premier, car la S.A.C.M. dont les usines allemandes se localisent à Graffenstaden et à Mulhouse est convoitée à la fois par les entrepreneurs d’Allemagne du sud et ceux de Rhénanie-Westphalie de sorte que sa liquidation en 1917 exacerbe encore ce conflit interne à l’Allemagne.
Quelles stratégies d’externalisation à moyen terme des compétences pour les entreprises de la fourniture de systèmes d’information au prisme de la criticité des compétences ?
Authors: Sanséau Pierre-Yves , Branchet Bénédicte
Published: May 2017

Cet article étudie le lien entre la criticité des compétences et leur externalisation, en fonction de leur nature, dans le domaine de la fourniture des systèmes d’information dans une perspective de moyen terme. Les résultats (analyse thématique de quinze entretiens) identifient des compétences critiques et des compétences périphériques externalisables. Ils suggèrent une nécessaire adaptation des gestions prévisionnelles des compétences et des formations.
La consécration du modèle de l’entité par les IFRS : perspectives critiques après un siècle d’évolution des modèles de consolidation des groupes
Authors: Pourtier Frédéric
Published: May 2017

Les IFRS sont basés sur le concept de l’entité cohérent avec la théorie écrite par Moonitz qui, le premier, a posé celle-ci comme un axiome pour les états consolidés, alors que les groupes étaient assimilés à des firmes avec succursales. Aujourd’hui, les groupes ont des frontières floues et souples, utilisant des artifices juridiques pour le contrôle de leurs revenus. Leur zone d’influence est plus grande que le périmètre de consolidation soulevant la question de savoir si les IFRS peuvent traduire cette réalité et saisir ses changements.
Comptabilisation de couverture sous IFRS 9 : apports et application au cas des dérivés carbone
Authors: Barneto Pascal , Rannou Yves , Ricci-Xella Nadine
Published: May 2017

IFRS 9 Instruments Financiers remplacera la norme comptable IAS 39 au 1 er Janvier 2018. Elle doit permettre aux sociétés européennes de mieux informer sur leurs stratégies de couverture au sein des états financiers en élargissant les critères d’enregistrement et en assouplissant les tests d’efficacité. Notre étude traite de la possibilité de tels apports et des modalités d’application d’IFRS 9 à partir des dérivés carbone, peu comptabilisés selon IAS 39.
La critique féministe profane en ligne de films et de séries télévisées
Authors: Breda Hélène
Published: May 2017

Cet article étudie un ensemble de discours critiques féministes publiés en ligne, dont l’objet est la fiction audiovisuelle. À travers l’examen de quelques critères analytiques qui structurent ces textes, ainsi que de stratégies de circulation des connaissances et des revendications, j’avancerai que les critiques à vocation militante de films et de séries télévisées sont des instruments de lutte sociopolitique, qui participent d’une praxis féministe. De par leur dimension pédagogique, à la faveur de réseaux élaborés sur le Net, ces critiques favorisent l’émergence et l’épanouissement de communautés interprétatives antisexistes. Ce faisant, elles permettent d’interroger la manière dont la fiction perpétue ou reconfigure des rôles genrés.
Migrations du travail et politiques publiques : vers une informalisation internationale du travail ?
Authors: Soussi Sid Ahmed
Published: May 2017

Cette étude comparative analyse le cas des politiques publiques canadiennes en matière de travail migrant temporaire au regard des principales tendances contemporaines caractérisant les migrations internationales du travail. Elle en examine les conséquences socioéconomiques sur la régulation de l’emploi et l’accès aux droits sociaux du travail à partir d’une analyse critique des politiques publiques canadiennes d’immigration et d’emploi. Cette étude se focalise d’abord, au niveau infranational, sur les incidences locales des principaux programmes canadiens de « travailleurs étrangers temporaires » et sur l’émergence d’une « zone grise » de l’emploi dans des espaces du travail qui, au Canada, ont toujours été étroitement encadrés par un modèle de relations du travail issu du New Deal clairement en rupture avec l’informalité grandissante affectant cette « zone grise ». Elle aborde ensuite, sur un niveau international, ces flux migratoires du travail dans la perspective de la division internationale du travail dont ces derniers s’imposent désormais comme une figure centrale et en souligne les conséquences en termes d’accès aux droits sociaux et de dérégulation du rapport salarial. La conclusion pose la question du rôle ambivalent de l’État dans la gestion de ces flux et de leurs incidences sur la formation de nouveaux espaces d’informalité du travail : une tendance internationale lourde.
Faire les marchés : commerçant·e·s à La Paz et à Roubaix
Authors: Marchand Véronique
Published: May 2017

La confrontation de deux enquêtes ethnographiques sur les marchés menées l’une à La Paz, l’autre à Roubaix, illustre comment la question des rapports sociaux de sexe s’insère dans un ensemble complexe d’identifications ethniques, professionnelles et de genre qui prenne en compte la génération et le niveau d’instruction. À La Paz, les marchés sont occupés presque exclusivement par des femmes d’origine migrante souvent analphabètes et responsables du budget familial ; la masculinisation du commerce de rue à partir des années 1980 s’accompagne d’une volonté des femmes de préserver leur quasi-monopole. À Roubaix, on trouve une grande majorité d’hommes d’origine nord-africaine exclus du marché du travail salarié. Les femmes très minoritaires sont non diplômées et le plus souvent seules responsables du budget familial. Dans les deux cas, le marché se révèle être une forme de travail non salarié permettant l’émancipation des femmes vis-à-vis des hommes
Audre Lorde, l’ outsider . Une poétesse et intellectuelle féministe africaine-américaine
Authors: Hedjerassi Nassira
Published: May 2017

Cet article porte sur Audre Lorde, une poétesse et une figure emblématique de l’histoire des luttes et des pensées féministes et lesbiennes africaines-américaines du xx e siècle. Je cherche à comprendre à partir de son enfance et de sa jeunesse comment elle s’est construite comme intellectuelle, dans le contexte étatsunien marqué par un système ségrégationniste limitant l’accès des populations noires de manière générale – et des femmes noires en particulier – à un certain nombre de droits, à l’éducation, au travail (en particulier aux emplois qualifiés et aux professions intellectuelles supérieures). En m’appuyant sur un matériau (auto)biographique, je m’attache à éclairer son parcours de formation, le situant dans son contexte socio-historique, selon une grille de lecture articulant l’ensemble interconnecté des rapports sociaux à l’œuvre (classe, race, sexe).
Providing Undergraduate Nursing Students and the Community With an Opportunity to SMILE: Student Managed Initiatives in Lifestyle Education
Authors: Ward Louise , Ward Daniel
Published: May 2017

Background:

The SMILE:StudentManagedInitiative inLifestyleEducation program is an arts and health workshop that runs for 2 hours per day for 8 weeks. Health care students and community members are invited to participate. SMILE was developed to provide undergraduate nursing and health care students with an opportunity to practice and improve on their communication, group facilitation, and leadership skills. SMILE also provides community participants access to an arts and health education workshop.

Method:

The SMILE project was evaluated using a qualitative approach to identify effects to student and community participant learning.

Results:

The SMILE evaluation highlighted a key theme: Helping to Learn, Learning to Help. Students identified SMILE as an opportunity to learn how to help and community members recognized and valued their role in helping students learn.

Conclusion:

This article provides an overview of the SMILE program and report on the evaluation findings. [J Nurs Educ.2017;56(5):309–313.]
Confirmation of the presence of Ornithogalum umbellatum (Hyacinthaceae) in the Iberian Peninsula
Authors: Mercadal i Corominas Gabriel , Martínez Azorín Mario , Crespo Manuel B.
Published: May 2017

The study of plant material from three populations in northeastern Spain and southern France revealed the presence of O. umbellatum as a new record for the Iberian flora. Although this species had been cited in the Iberian Peninsula by various authors within the last two centuries, its presence in this territory could not been confirmed in recent years. A complete description is presented for O. umbellatum and an identification key is included to cover all species of Ornithogalum s. str. (O. subgen. Ornithogalum) of the Iberian Peninsula, as an amendment for their taxonomic treatment in Flora iberica.
Cytogenetic relationships within the Maghrebian clade of Festuca subgen. Schedonorus (Poaceae), using flow cytometry and FISH
Authors: Ezquerro-López David , Kopecký David , Inda Luis Á.
Published: May 2017

Festuca subgen. Schedonorus is a group of broad-leaved fescues, which can be divided into two clades: European and Maghrebian. We employed fluorescent in situ hybridization —FISH— with probes specific for 5S and 35S ribosomal DNA and genome size estimation using flow cytometry to shed light on the determination of possible parental genomes of polyploid species of the Maghrebian clade. Our results indicate that octoploid F. arundinacea subsp. atlantigena probably originated from crossing of the tetraploids F. arundinacea subsp. fenas —2n = 4x = 28— and F. mairei —2n = 4x = 28— followed by whole genome duplication. However, a large reconstruction of karyotype and genome downsizing has been revealed. Similarly, hexaploid F. arundinacea subsp. corsica presumably resulted from the interspecific hybridization of the diploid F. pratensis and tetraploid F. arundinacea subsp. fenas. Several scenarios on the origin of decaploid F. arundinacea var. letourneuxiana are discussed. This study contributed to our knowledge on the phylogeny of broad-leaved fescues and provided new information on the karyotypes —chromosome numbers, ploidy levels and numbers and positions of rDNA loci— using FISH and genome size estimations using flow cytometry in selected taxa of this important grass genus.
Description verbale du mouvement dans le cadre de la typologie talmienne – une évaluation au croisement de deux paradigmes : le cognitivisme et l’enactivisme
Authors: Barnabé Aurélie
Published: May 2017

Des corpus oraux sont évalués dans le cadre d’une expérience recrutant des locuteurs français et anglais, tous soumis à des contraintes sensorimotrices avant de décrire des scènes les incitant à employer des verbes qui manifestent la notion de mouvement. Se basant sur la typologie talmienne, le but du présent article consiste à évaluer les items verbaux employés par anglophones et francophones, verbes qui permettent de distinguer l’anglais en tant que langue à satellites du français en tant que langue à cadrage verbal. L’analyse des corpus démontre que l’appartenance typologique d’une langue ne se maintient pas une fois le discours installé en situation interactive, et dans un contexte dans lequel une variable non linguistique est prise en compte dans la réalisation des corpus examinés. L’étude des données linguistiques étant liée aux comportements kinesthésiques du sujet parlant, on envisage celui-ci enacter le monde, à défaut de le représenter. Par cette analyse, on ne considère pas la langue parlée par la dimension représentationnaliste qui sous-tend le cognitivisme. La langue est en revanche appréhendée par l’enactivisme qui offre un nouvel examen des données linguistiques.
Does Demographics Affect Purchase Frequency in Online Retail?
Authors: Kalia Prateek
Published: May 2017

This research determines whether association exist between the demographic characteristics of online shoppers, such as education, age, gender, monthly income, occupation, marital status and their online purchase frequency. Web survey has been applied to 308 customers of four most popular e-retailers in India, who have made at least one online purchase in past six months. Based on extensive literature review hypotheses have been developed for six demographic factors i.e. education, age, income, occupation, marital status and gender. A chi-square test has been deployed to check association between demographic factors and purchase frequency. Significant association has been found between two demographic variables i.e. gender, occupation and purchase frequency. Further, a chi-square post hoc test via standard residual method confirmed that purchase frequency of 1-3 times in past six months by student customers contributes significantly to significant omnibus chi-square statistic.
Path Pendeccentric Connectivity Indices: Detour Matrix Based Molecular Descriptors for QSAR/QSPR Studies, Part 2
Authors: Khatri Naveen , Madan A. K.
Published: May 2017

A pivotal role of tyrosine threonine kinase (TTK) has been established in tumor initiation, survival of genomically unstable and aneuploid cancer cells. In present study, path pendeccentric connectivity indices reported in part 1 of the manuscript were successfully applied for developing models for predicting TTK inhibitory activity of acetamide/carboxamide analogs. Diverse 2D and 3D molecular descriptors (MDs) were successfully utilized for developing models using artificial neural networks (ANN) and moving average analysis (MAA). The overall accuracy of prediction achieved for ANN and MAA based models was up to 96% for the training set and up to 92% during cross validation. The statistical utility of the said models was also evaluated through Matthews correlation coefficient, non error rate, sensitivity and intercorrelation analysis. Low IC50 values obtained for active ranges of the proposed MAA based models indicate the tremendous potential of said models for furnishing lead molecules for developing potent TTK inhibiting acetamide/carboxamide analogs.
Security and Verification of Server Data Using Frequent Itemset Mining in Ecommerce
Authors: Shaikh Zuber , Mohadikar Antara , Nayak Rachana , Padamadan Rohith
Published: May 2017

Frequent itemsets refer to a set of data values (e.g., product items) whose number of co-occurrences exceeds a given threshold. The challenge is that the design of proofs and verification objects has to be customized for different data mining algorithms. Intended method will implement a basic idea of completeness verification and authentication approach in which the client will uses a set of frequent item sets as the evidence, and checks whether the server has missed any frequent item set as evidence in its returned result. It will help client detect untrusted server and system will become much more efficiency by reducing time. In authentication process CaRP is both a captcha and a graphical password scheme. CaRP addresses a number of security problems altogether, such as online guessing attacks, relay attacks, and, if combined with dual-view technologies, shoulder-surfing attacks.
A Proposal for UTAUT Model Extension in the Virtual Learning Environments use as Presential Learning Support Context
Authors: Junior Ivo Pedro Gonzalez , Marques dos Santos Ernani
Published: May 2017

With the emergence of Virtual Learning Environments (VLE) in the educational context, the teaching forms are undergoing transformations, both for distance and presential learning. The growing use of VLE and the acceptance of this technology, its behavior and its success is directly related to its adoption by teachers and students. The technology adoption has been studied in recent decades, and many analysis models have been proposed. This study is based on the Unified Theory of Acceptance and Use of Technology model, that is an attempt at an assembly of constructs from other theories and models. However, this model still has not addressed gaps and not discussed issues when applied to some contexts. This article aims to propose an extension of UTAUT model for analysis of VLE adoption as support to presential learning, including new elements such as interactivity, monitoring and continuity of use.
Effects of Team Collaboration on Sharing Information Security Advice
Authors: Dang-Pham Duy , Nkhoma Mathews
Published: May 2017

Active sharing of information security advice among the employees has undeniable implications for developing a sustainable security environment. This research examines this topic from the network perspective, and focuses on the work relationships that promote sharing security advice. Exponential random graph modeling technique was employed to evaluate the relationship between team collaborative activities and sharing security advice. The findings revealed that those who share security advice also tend to give work- and IT-related knowledge. Moreover, employees who have similar tenure tend to exchange security advice with each other more. Furthermore, the network of sharing security advice is transitive and has a tendency to form separate clusters. Security managers are suggested to take into account the research findings to identify key employees who frequently share security advice in the workplace and devise appropriate strategies to manage them.
The Impact of the Internet on Values in India
Authors: Lane Vicki R. , Khuntia Jiban , Parthasarathy Madhavan , Hazarika Bidyut B.
Published: May 2017

In this study, the authors examine how the internet is changing two critical personal value dimensions of India's youth. Based on values theory, and using data that spans a decade from 2004-2014, they contend that time spent on the internet is an influential factor in changing self-enhancement and self-transcendence values. Given the tremendous increase in exposure to western products, ideals, and people-to-people interaction via internet connectivity (India has over 275 million internet users who communicate in the English language), the authors posit that young Indian consumers would adopt values associated with self-enhancement and individualism, forsaking self-transcendence related ideals. Data pertaining to the Rokeach value scales were collected in New Delhi, and the results support the notion that these values have indeed changed substantially in such a short amount of time, largely due to IT as opposed to other media vehicles such as TV, and print media. Implications of this noteworthy change in values due to the internet in a relatively short period are discussed.
Non-competitive ELISA with broad specificity for microcystins and nodularins
Authors: Akter Sultana , Vehniäinen Markus , Meriluoto Jussi , Spoof Lisa , Lamminmäki Urpo
Published: May 2017

Simple and cost-effective methods with sufficient sensitivities for preliminary screening of cyanobacterial toxins are in high demand for assessing water quality and safety. We have recently developed a highly sensitive and rapid time-resolved fluorometry based non-competitive immunoassay for detection of microcystins and nodularins. The assay is based on a synthetic broad-specific anti-immunocomplex antibody SA51D1 capable of recognizing the immunocomplex formed by a generic anti-Adda monoclonal antibody (mAb) bound to either microcystins or nodularins. Using the same antibody pair, here we describe a very simple and cost-efficient non-competitive ELISA test for microcystins and nodularins based on conventional alkaline phosphatase (AP) activity measurement. The recombinant SA51D1 single-chain fragment of antibody variable domain (scFv) was produced as a fusion with bacterial alkaline phosphatase in Escherichia coli. After one step affinity purification through His-tag, the scFv-AP fusion protein could directly be used in the assay. For the assay, toxin standard/sample, biotinylated anti-Adda mAb and the scFv-AP were incubated together for one hour on streptavidin-coated microtiter wells, washed and AP activity was then measured by incubating (1 h at 37 ˚C) with chromogenic substrate para-nitrophenylphosphate (pNPP). The assay was capable of detecting all the eleven tested toxin variants (microcystin-LR, -dmLR, -RR, -dmRR, -YR, LA -LY, -LF -LW, -WR, and nodularin-R) below WHO guide line value of 1 µg L-1. The detection limit (based on blank+3SD response) for microcystin-LR was ~0.2 µg L-1. The assay was verified using spiked (0.25 - 4 µg L-1 of microcystin-LR) tap, river and lake water samples with recoveries from 64 to 101%. The assay showed good correlation (r2>0.9) with four reference methods for its performance in detecting extracted intracellular microcystin/nodularin from 17 natural surface water samples. The described easy-to-perform assay has a high potential to be used in resource-poor settings as quantitative measurements can be obtained using a simple ELISA reader or easy-to-interpret qualitative results by visual readout. Based on the non-competitive format, the assay does not need any chemical toxin conjugates and offers robustness as compared to the currently available competitive format assays.
Review of 130 years of research on cyanobacteria in aquatic ecosystems in Serbia presented in a Serbian Cyanobacterial Database
Authors: Svirčev Zorica , Tokodi Nada , Drobac Damjana
Published: May 2017

The presence of toxic cyanobacteria in aquatic ecosystems in the territory of the Republic of Serbia was surveyed over a period of several decades. Increasing attention is being paid to some negative consequences that may be caused by these microorganisms. Information from available literary sources regarding the distribution and frequency of cyanobacteria and their toxins over a period of 130 years, together with the effects on humans and wildlife in aquatic ecosystems, were gathered and incorporated into a Serbian Cyanobacterial Database created for the CYANOCOST Action. This database encompasses information on 65 aquatic ecosystems, including rivers, lakes, ponds, canals, irrigation reservoirs, reservoirs used for drinking water supply and reservoirs used for other purposes. Cyanobacterial blooms were found in almost 80% of the investigated aquatic ecosystems. The analysis of the research showed the presence of more than 70 species, including blooms of 24 species from 13 genera. Five species of cyanobacteria: Microcystis aeruginosa, Aphanizomenon flos-aquae, Planktothrix agardhii, Microcystis flos-aquae and Planktothrix rubescens frequently formed blooms in the investigated waterbodies and cyanotoxins were also detected in some of them, which had certain negative effects. Here, we present an overview of data contained in the Serbian Cyanobacterial Database, concerning cyanobacterial distribution, cyanotoxin production and associated biological effects in different types of water bodies from the Republic of Serbia. Also, recent important and major cases of cyanobacterial blooming in reservoirs used for drinking water supply: at Vrutci and Ćelije, the Aleksandrovac irrigation reservoir, the Ponjavica River and Lake Palić, including systematic research on the Lake Ludoš and few fishponds are further described. It can be concluded that cyanobacteria and cyanotoxins are omnipresent in different water bodies throughout the Republic of Serbia. For these reasons it is imperative to continue with the monitoring of cyanobacteria and cyanotoxins, as well as to continuously supplement the established database with new information. The Serbian Cyanobacterial Database represents a treasury of information on cyanobacteria and their toxins, and as a model for other countries in the region and beyond. 
Toxic cyanobacteria and cyanotoxins in European waters – recent progress achieved through the CYANOCOST Action and challenges for further research
Authors: Meriluoto Jussi , Blaha Ludek , Bojadzija Gorenka , Bormans Myriam , Brient Luc , Codd Geoffrey A. , Drobac Damjana , Faassen Elisabeth J. , Fastner Jutta , Hiskia Anastasia , Ibelings Bastiaan W. , Kaloudis Triantafyllos , Kokocinski Mikolaj , Kurmayer Rainer , Pantelić Dijana , Quesada Antonio , Salmaso Nico , Tokodi Nada , Triantis Theodoros M. , Visser Petra M. , Svirčev Zorica
Published: May 2017

This review aims to summarise the outcomes of some recent European research concerning toxic cyanobacteria and cyanotoxins, with an emphasis on developments within the framework of the CYANOCOST Action (COST Action ES1105, Cyanobacterial Blooms and Toxins in Water Resources: Occurrence, Impacts and Management). State of the art research and management capabilities in Europe on cyanobacteria have benefitted from input from the pure and applied life sciences, the human and animal health sectors, water engineers, economists and planners. Many of these professional groups have been brought together and they interacted favourably within the framework of CYANOCOST.Highlights of the Action include phycological and ecological studies, development of advanced techniques for cyanotoxin analysis, elucidation of cyanotoxin modes of action, management techniques to reduce cyanobacterial mass development, and research on methods and practices for cyanotoxin removal during drinking water treatment. The CYANOCOST Action has had an active outreach policy throughout its lifetime, resulting in e.g. three handbooks, two special issues in scientific journals and activities in the social media. The many contact channels to end-users, including environmental and drinking water supply authorities, health professionals and the general public are described in this review.Furthermore, the authors have identified a number of gaps in knowledge. Proposed  directions for  future research in the field of toxic cyanobacteria and cyanotoxins are also discussed.
A revised look at Canada's landscape: glacial processes and dynamics
Authors: Paulen R C
Published: May 2017

Our understanding of the Laurentide Ice Sheet has been significantly improved by recent developments in theoretical models of ice sheets and ice dynamics, understanding of mechanisms of glacial erosion, transport and deposition, and mapping of glacial deposits
and drift composition. Theoretical models have increasingly accommodated diverse glaciological, physiographic and geological factors that can affect ice flow, and have been used to reinterpret the geological record in terms of glacial processes. The glacial system of North America is described at
scales from continental (thousands of square kilometres), to regional (hundreds of square kilometres), local (kilometres to tens of kilometres), and site-specific (hundreds of metres to kilometres). Drift prospecting is based on an understanding that indicators of economic mineralization recovered
from glacial deposits can be traced back to their original bedrock source. Geochemical, mineralogical and lithological methods employed in the exploration for mineral deposits in glaciated terrain requires knowledge of past glacial flow direction(s), means of entrainment, and variations in the
nature of glacial dispersal such as glacial sediment thickness, bedrock topography, bedrock erodibility, and basal glacial flow velocity gradient. Combined, this knowledge is used to determine the distance to the up-ice bedrock source from the identified down-ice dispersal train location. Over the
last two decades, drift prospecting in northern Canada has significantly improved through the continued development of ice sheets models, and the acquisition of empirical evidence for ice-flow patterns, drift composition and glacial history. Increased attention to the dynamic nature of glacial
dispersal centers and related ice-flow complexes has thus become increasingly important for mineral exploration in northern Canada.
Following kimberlite indicator minerals to source in the Chidliak Kimberlite Province, Nunavut
Authors: Pell J , Clements B , Grütter H , Neilson S , Grenon H
Published: May 2017

The discovery of diamond-bearing kimberlite within the Chidliak kimberlite province on Hall Peninsula, southern Baffin Island, Nunavut, is a classic example of the application of traditional diamond-exploration techniques in a glaciated terrain. To date, 64
kimberlite pipes have been discovered: 61 on the Chidliak project and three on the adjacent Qilaq project. The first discovery was made in 2008, making Chidliak the most recent kimberlite province discovered in Canada. Comprehensive kimberlite indicator mineral (KIM) classification and
interpretation techniques, including abrasion and geochemical analyses have played a significant role in these discoveries and have evolved over the course of the project.
Point Integral Method for Solving Poisson-Type Equations on Manifolds from Point Clouds with Convergence Guarantees
Authors: Li Zhen , Shi Zuoqiang , Sun Jian
Published: May 2017

Partial differential equations (PDE) on manifolds arise in many areas, including mathematics and many applied fields. Due to the complicated geometrical structure of the manifold, it is difficult to get efficient numerical method to solve PDE on manifold. In the paper, we propose a method called point integral method (PIM) to solve the Poisson-type equations from point clouds. Among different kinds of PDEs, the Poisson-type equations including the standard Poisson equation and the related eigenproblem of the Laplace-Beltrami operator are one of the most important. In PIM, the key idea is to derive the integral equations which approximates the Poisson-type equations and contains no derivatives but only the values of the unknown function. This feature makes the integral equation easy to be discretized from point cloud. In the paper, we explain the derivation of the integral equations, describe the point integral method and its implementation, and present the numerical experiments to demonstrate the convergence of PIM.
Characteristic Local Discontinuous Galerkin Methods for Incompressible Navier-Stokes Equations
Authors: Wang Shuqin , Deng Weihua , Yuan Jinyun , Wu Yujiang
Published: May 2017

By combining the characteristic method and the local discontinuous Galerkin method with carefully constructing numerical fluxes, variational formulations are established for time-dependent incompressible Navier-Stokes equations in ℝ2. The nonlinear stability is proved for the proposed symmetric variational formulation. Moreover, for general triangulations the priori estimates for the L2–norm of the errors in both velocity and pressure are derived. Some numerical experiments are performed to verify theoretical results.
Efficient Numerical Solution of Dynamical Ginzburg-Landau Equations under the Lorentz Gauge
Authors: Gao Huadong
Published: May 2017

In this paper, a new numerical scheme for the time dependent Ginzburg-Landau (GL) equations under the Lorentz gauge is proposed. We first rewrite the original GL equations into a new mixed formulation, which consists of three parabolic equations for the order parameter ψ, the magnetic field σ=curlA, the electric potential θ=divA and a vector ordinary differential equation for the magnetic potential A, respectively. Then, an efficient fully linearized backward Euler finite element method (FEM) is proposed for the mixed GL system, where conventional Lagrange element method is used in spatial discretization. The new approach offers many advantages on both accuracy and efficiency over existing methods for the GL equations under the Lorentz gauge. Three physical variables ψ, σ and θ can be solved accurately and directly. More importantly, the new approach is well suitable for non-convex superconductors. We present a set of numerical examples to confirm these advantages.
Further Study on Errors in Metric Evaluation by Linear Upwind Schemes with Flux Splitting in Stationary Grids
Authors: Li Qin , Sun Dong , Liu Pengxin
Published: May 2017

The importance of eliminating errors in grid-metric evaluation for high-order difference schemes has been widely recognized in recent years, and it is known from the proof by Vinokur and Yee (NASA TM 209598, 2000) that when conservative derivations of grid metric are used by Thomas, Lombard and Neier (AIAA J., 1978, 17(10) and J. Spacecraft and rocket, 1990, 27(2)), errors caused by metric evaluation could be eliminated by linear schemes when flux splitting is not considered. According to the above achievement, central schemes without the use of flux splitting could fulfill the requirement of error elimination. Difficulties will arise for upwind schemes to attain the objective when the splitting is considered. In this study, further investigations are made on three aspects: Firstly, an idea of central scheme decomposition is introduced, and the procedure to derive the central scheme is proposed to evaluate grid metrics only. Secondly, the analysis has been made on the requirement of flux splitting to acquire free-stream preservation, and a Lax-Friedrichs-type splitting scheme is proposed as an example. Discussions about current study with that by Nonomura et al. (Computers and Fluids, 2015, 107) have been made. Thirdly, for half-node- or mixed-type schemes, interpolations should be used to derive variables at half nodes. The requirement to achieve metric identity on this situation is analyzed and an idea of directionally consistent interpolation is proposed, which is manifested to be indispensable to avoid violations of metric identity and to eliminate metric-caused errors thereafter. Two numerical problems are tested, i.e., the free-stream and vortex preservation on wavy, largely randomized and triangular-like grids. Numerical results validate aforementioned theoretical outcomes.
Combining Contrast Mining with Logistic Regression To Predict Healthcare Utilization in a Managed Care Population
Authors: Sheets Lincoln , Petroski Gregory , Zhuang Yan , Phinney Michael , Ge Bin , Parker Jerry , Shyu Chi-Ren
Published: May 2017

Background: Because 5% of patients incur 50% of healthcare expenses, population health managers need to be able to focus preventive and longitudinal care on those patients who are at highest risk of increased utilization. Predictive analytics can be used to identify these patients and to better manage their care. Data mining permits the development of models that surpass the size restrictions of traditional statistical methods and take advantage of the rich data available in the electronic health record (EHR), without limiting predictions to specific chronic conditions.

Objective: The objective was to demonstrate the usefulness of unrestricted EHR data for predictive analytics in managed healthcare.

Methods: In a population of 9,568 Medicare and Medicaid beneficiaries, patients in the highest 5% of charges were compared to equal numbers of patients with the lowest charges. Contrast mining was used to discover the combinations of clinical attributes frequently associated with high utilization and infrequently associated with low utilization. The attributes found in these combinations were then tested by multiple logistic regression, and the discrimination of the model was evaluated by the c-statistic.

Results: Of 19,014 potential EHR patient attributes, 67 were found in combinations frequently associated with high utilization, but not with low utilization (support>20%). Eleven of these attributes were significantly associated with high utilization (p<0.05). A prediction model composed of these eleven attributes had a discrimination of 84%.

Conclusions: EHR mining reduced an unusably high number of patient attributes to a manageable set of potential healthcare utilization predictors, without conjecturing on which attributes would be useful. Treating these results as hypotheses to be tested by conventional methods yielded a highly accurate predictive model. This novel, two-step methodology can assist population health managers to focus preventive and longitudinal care on those patients who are at highest risk for increased utilization.

Citation: Sheets L, Petroski GF, Zhuang Y, Phinney MA, Ge B, Parker JC, Shyu C-R. Combining contrast mining with logistic regression to predict healthcare Appl Clin Inform 2017; 8: 430–446 https://doi.org/10.4338/ACI-2016-05-RA-0078
An Unusual Case of Total Anomalous Pulmonary Venous Connection in Pregnancy
Authors: Mehta Priyanka , Vishwanath Usha , Anitha M , Kandasamy Archana
Published: May 2017

Total anomalous pulmonary venous connection (TAPVC) is a rare congenital anomaly of the heart in which there is an absence of direct communication between the pulmonary veins and the left atrium, resulting in a mixture of oxygenated and deoxygenated blood in the right atrium. It is often associated with atrial septal defect or with transposition of great arteries, pulmonary atresia, truncus arteriosus, or single ventricle. The factors determining the severity are the severity of pulmonary venous obstruction and the restriction of interatrial communication. Uncorrected TAPVC rarely survives up to adulthood. Pregnancy in a patient with TAPVC is very rare unless surgically corrected in childhood. It often requires termination of pregnancy in first trimester as the heart cannot withstand the hemodynamic changes associated with pregnancy. We report a very rare case of pregnancy in a patient with uncorrected TAPVC, delivered successfully in our hospital without any complications.

How to cite this article

Kandasamy A, Vishwanath U, Anitha M, Mehta P. An Unusual Case of Total Anomalous Pulmonary Venous Connection in Pregnancy. J South Asian Feder Obst Gynae 2017;9(2):190-191.
Sonohysterography
Authors: Okamura Kunihiro , Murakami Takashi , Kimura Fuminori , Tsuji Shunichiro
Published: May 2017

Sonohysterography (SHG) is a simple, less invasive, and inexpensive technique using the transcervical injection of sterile fluid during ultrasonic examination. As SHG is very helpful for the diagnosis of congenital or acquired abnormalities of the uterus and tubal patency, it is indicated in patients with abnormal uterine bleeding, infertility, recurrent pregnancy loss, and so on. The SHG provides better definition of intracavitary lesions, such as endometrial polyp, submucous leiomyoma, and synechiae, than simple transvaginal sonography. Currently, SHG has become a standard test in gynecological outpatient facilities. Adequate training, careful operations, and thoughtful interpretations are required for safe procedure and accurate diagnosis.

How to cite this article

Murakami T, Kimura F, Tsuji S, Okamura K. Sonohysterography. Donald School J Ultrasound Obstet Gynecol 2017;11(1):69-75.
Management of a Case of Dropped Nucleus following Small Incision Cataract Surgery in a Patient with Thoracic Kyphoscoliosis and Review of Literature
Authors: Katoch Deeksha , Handa Sabia , Mandal Banashree
Published: May 2017

A curved spine accompanied by restricted neck motion poses a challenge for an ophthalmic surgeon, especially a vitreoretinal surgeon, who needs the patient’s eyes in a horizontal position to operate with the microscope. Literature is sparse with case reports of thoracic kyphoscoliosis for vitreoretinal surgery, although many reports are available for cataract surgery. We report a case of thoracic kyphoscoliosis and ankylosing spondylitis with dropped nucleus into the vitreous cavity following a complicated cataract surgery posted for pars plana vitrectomy, pars plana lensectomy, and phacofragmentation under general anesthesia and review the current literature of such case.

How to cite this article

Mandal B, Katoch D, Handa S. Management of a Case of Dropped Nucleus following Small Incision Cataract Surgery in a Patient with Thoracic Kyphoscoliosis and Review of Literature. Res Inno in Anesth 2017;2(1):21-23.
In vitro Studies on Antidiabetic Potential of New Dosage Forms of AYUSH 82
Authors: Setia M , Meena K , Madaan A , Srikanth Narayanam , Dhiman Kartar S , Sastry JLN
Published: May 2017

AYUSH 82 powder is an Ayurvedic antidiabetic formulation developed by the Central Council for Research in Ayurvedic Sciences (CCRAS), Ministry of AYUSH, Government of India. It comprises ingredients traditionally used for their beneficial effect in diabetes (Prameha/Madhumeha). The hypoglycemic effects of AYUSH 82 powder have been reported in diabetic subjects. In the current study, the antidiabetic potential of AYUSH 82 powder along with its two new dosage forms – AYUSH 82 mixture extract and AYUSH 82 compound extract- was investigated in vitro for elucidating mechanism of their action by possible α-amylase inhibitory property, insulindependent glucose uptake in skeletal muscle cell line (C2C12 myotubes), and effect on peroxisome proliferator-activated receptor gamma (PPAR-γ) activity.

All the three dosage forms of AYUSH 82 – powder, mixture extract, and compound extract – exhibited inhibition of α-amylase activity. AYUSH 82 mixture extract, however, demonstrated highest extent of inhibition in both methanolic (87.4%) and aqueous (48.2%) format. All the three dosage forms of AYUSH 82 also demonstrated an increase in insulin-dependent glucose uptake in C2C12 myotubes as compared with control. However, none of the test items (TIs) exhibited activation of PPAR-γ expression in tested ranges, indicating that antidiabetic potential of TIs may not be mediated via PPAR-γ activation. Results indicated that the new dosage forms of AYUSH 82 (mixture extract and compound extract) may be useful for making new dosage forms of AYUSH 82 as tablets/capsule, etc.
Global large-scale stratosphere–troposphere exchange in modern reanalyses
Authors: Boothe Alexander C. , Homeyer Cameron R.
Published: May 2017

Abstract. Stratosphere–troposphere exchange (STE) has important impacts on the chemical and radiative properties of the upper troposphere and lower stratosphere. This study presents a 15-year climatology of global large-scale STE from four modern reanalyses: ERA-Interim, JRA-55, MERRA-2, and MERRA. STE is separated into three regions (tropics, subtropics, and extratropics) and two transport directions (stratosphere-to-troposphere transport or STT and troposphere-to-stratosphere transport or TST) in an attempt to identify the significance of known transport mechanisms. The extratropics and tropics are separated by the tropopause break. Any STE occurring between the tropics and the extratropics through the tropopause break is considered subtropical exchange (i.e., in the vicinity of the subtropical jet). In addition, this study employs a method to identify STE as that which crosses the lapse-rate tropopause (LRT), while most previous studies have used a potential vorticity (PV) isosurface as the troposphere–stratosphere boundary. PV-based and LRT-based STE climatologies are compared using the ERA-Interim reanalysis output. The comparison reveals quantitative and qualitative differences, particularly for TST in the polar regions. Based upon spatiotemporal integrations, we find STE to be STT dominant in ERA-Interim and JRA-55 and TST dominant in MERRA and MERRA-2. The sources of the differences are mainly attributed to inconsistencies in the representation of STE in the subtropics and extratropics. Time series during the 15-year analysis period show long-term changes that are argued to correspond with changes in the Brewer–Dobson circulation.
Analysis of aerosol effects on warm clouds over the Yangtze River Delta from multi-sensor satellite observations
Authors: Liu Yuqin , de Leeuw Gerrit , Kerminen Veli-Matti , Zhang Jiahua , Zhou Putian , Nie Wei , Qi Ximeng , Hong Juan , Wang Yonghong , Ding Aijun , Guo Huadong , Krüger Olaf , Kulmala Markku , Petäjä Tuukka
Published: May 2017

Abstract. Aerosol effects on low warm clouds over the Yangtze River Delta (YRD, eastern China) are examined using co-located MODIS, CALIOP and CloudSat observations. By taking the vertical locations of aerosol and cloud layers into account, we use simultaneously observed aerosol and cloud data to investigate relationships between cloud properties and the amount of aerosol particles (using aerosol optical depth, AOD, as a proxy). Also, we investigate the impact of aerosol types on the variation of cloud properties with AOD. Finally, we explore how meteorological conditions affect these relationships using ERA-Interim reanalysis data. This study shows that the relation between cloud properties and AOD depends on the aerosol abundance, with a different behaviour for low and high AOD (i.e. AOD < 0.35 and AOD > 0.35). This applies to cloud droplet effective radius (CDR) and cloud fraction (CF), but not to cloud optical thickness (COT) and cloud top pressure (CTP). COT is found to decrease when AOD increases, which may be due to radiative effects and retrieval artefacts caused by absorbing aerosol. Conversely, CTP tends to increase with elevated AOD, indicating that the aerosol is not always prone to expand the vertical extension. It also shows that the COT–CDR and CWP (cloud liquid water path)–CDR relationships are not unique, but affected by atmospheric aerosol loading. Furthermore, separation of cases with either polluted dust or smoke aerosol shows that aerosol–cloud interaction (ACI) is stronger for clouds mixed with smoke aerosol than for clouds mixed with dust, which is ascribed to the higher absorption efficiency of smoke than dust. The variation of cloud properties with AOD is analysed for various relative humidity and boundary layer thermodynamic and dynamic conditions, showing that high relative humidity favours larger cloud droplet particles and increases cloud formation, irrespective of vertical or horizontal level. Stable atmospheric conditions enhance cloud cover horizontally. However, unstable atmospheric conditions favour thicker and higher clouds. Dynamically, upward motion of air parcels can also facilitate the formation of thicker and higher clouds. Overall, the present study provides an understanding of the impact of aerosols on cloud properties over the YRD. In addition to the amount of aerosol particles (or AOD), evidence is provided that aerosol types and ambient environmental conditions need to be considered to understand the observed relationships between cloud properties and AOD.
Long-path measurements of pollutants and micrometeorology over Highway 401 in Toronto
Authors: You Yuan , Staebler Ralf M. , Moussa Samar G. , Su Yushan , Munoz Tony , Stroud Craig , Zhang Junhua , Moran Michael D.
Published: May 2017

Abstract. Traffic emissions contribute significantly to urban air pollution. Measurements were conducted over Highway 401 in Toronto, Canada, with a long-path Fourier Transform Infra-Red Spectrometer (FTIR) combined with a suite of micrometeorological instruments, to identify and quantify a range of air pollutants. Results were compared with simultaneous in-situ observations at a roadside monitoring station, and with output from a special version of the operational Canadian air quality forecast model (GEM-MACH). Elevated mixing ratios of ammonia (0–23 ppb) were observed, of which 76 % were associated with traffic emissions. Hydrogen cyanide was identified at mixing ratios between 0 and 4 ppb. Using a simple dispersion model, an integrated emission factor of on average 2.6 g km−1 carbon monoxide was calculated for this defined section of Highway 401, which agreed well with estimates based on vehicular emission factors and observed traffic volumes. Based on the same dispersion calculations, vehicular average emission factors of 0.04, 0.36 and 0.15 g km−1 were calculated for ammonia, nitrogen oxide, and methanol respectively.