bluuebunny/crossref_metadata_2025_split huggingface dataset:
Le Master Migrations internationales, espaces et sociétés à Poitiers
Authors: Lessault David , Miranda Adelina , Lassailly-Jacob Véronique 
Published: May 2017

<p class="resume">Ce texte propose une synthèse des communications sur l’enseignement des migrations proposées au colloque des 30 ans de l’UMR Migrinter par Véronique Lassailly-Jacob sur les origines et l’histoire du Master à Poitiers (France), Pierre Kamdem sur la création d’un Master professionnel sur les relations « Migrations et développement » à Dschang (Cameroun) et Papa Sakho sur le développement du Master « Migrations Internationales, Développement et Relations Interculturelles » (MIRI) de Dakar (Sénégal). Ces trois interventions, complétées par les réflexions de David Lessault, responsable du Master « Migrations internationales, espaces et sociétés » (Poitiers) de 2013 à 2016 et Adelina Miranda, actuelle co-responsable avec Christophe Imbert, structurent le propos. Les auteurs soulignent les fondements théoriques et les grandes évolutions pédagogiques du Master migrations internationales de Poitiers et soulèvent finalement le défi et les difficultés actuelles de son internationalisation, notamment par le biais de coopérations universitaires avec des partenaires africains.</p>
Weak Factorizations of the Hardy Space H1(ℝn) in Terms of Multilinear Riesz Transforms
Authors: Li Ji , Wick Brett D. 
Published: May 2017

AbstractThis paper provides a constructive proof of the weak factorization of the classical Hardy space H1(ℝn) in terms of multilinear Riesz transforms. As a direct application, we obtain a new proof of the characterization of BMO(ℝn) (the dual of H1(ℝn)) via commutators of the multilinear Riesz transforms.
Numerical modeling of the 2013 meteorite entry in Lake Chebarkul, Russia
Authors: Kozelkov Andrey , Kurkin Andrey , Pelinovsky Efim , Kurulin Vadim , Tyatyushkina Elena 
Published: May 2017

Abstract. The results of the numerical simulation of possible hydrodynamic perturbations in Lake Chebarkul (Russia) as a consequence of the meteorite fall of 2013 (15 February) are presented. The numerical modeling is based on the Navier–Stokes equations for a two-phase fluid. The results of the simulation of a meteorite entering the water at an angle of 20° are given. Numerical experiments are carried out both when the lake is covered with ice and when it is not. The estimation of size of the destructed ice cover is made. It is shown that the size of the observed ice hole at the place of the meteorite fall is in good agreement with the theoretical predictions, as well as with other estimates. The heights of tsunami waves generated by a small meteorite entering the lake are small enough (a few centimeters) according to the estimations. However, the danger of a tsunami of meteorite or asteroid origin should not be underestimated.
The Brazilian Spring: Reconsidering Risk Assessment in Business and the Global Political Economy
Authors: Gouvea Raul , Kapelianis Dimitri , Montoya Manuel 
Published: May 2017

In June of 2013, Brazil saw a massive outbreak of public protests and demonstrations. The government‟s apathy in responding to demands for greater transparency and enhanced levels of public services, as well as increasing levels of corruption and opacity, lead to these public uprisings. This paper argued that emerging economies with a growing middle class, particularly those that do not pay heed to this emerging class and their needs, are bound to face “spring-type” events. Utilizing a case study “quadruple helix” framework, this paper conducted an institutional analysis of the Brazilian “Spring” movement. This analysis yielded a considerable set of descriptions that can enhance the way that “spring-type” events influence business, policy, and economic behavior. More specifically, this research contributed an institutional approach to scholarship on risk analysis and geo-political unrest, establishing new trajectories for future scholarship that places risk analysis in the context of international management and world political economy.
A giant soft tissue lesion of the male perineum: Unusual presentation of a cellular angiofibroma
Authors: Leung Kenneth , Ezekian Brian , Galeotti Jonathan , Cardona Diana , Blazer Dan G. 
Published: May 2017

Cellular angiofibromas (CAF) are rare, benign, soft tissue/stromal lesions first described by Nucci et al. in 1997. These masses are well circumscribed, typically small (< 6 cm), and occur mainly in the vulvar region in women and the inguinoscrotal region in men. We present a case of a 60-year-old male who was found to have a very large (20 cm × 13.5 cm × 6 cm) lesion occupying the deep pelvis bridging the pelvic outlet and involving the perineum. Because of diagnostic uncertainty and significant symptomatology, the mass was ultimately resected en bloc with the rectum and anus. Final pathology revealed a large multi-lobulated CAF. This tumor is the largest CAF reported in the literature to date. Furthermore, this mass involved the deep male pelvis with extension between two anatomic compartments which has not been previously described.
Vogt-Koyanagi-Harada syndrome: Experience in a Belgian university hospital and review of the literature
Authors: Sels Liza , Calster Joachim Van , Vanderschueren Steven , Henckaerts Liesbet 
Published: May 2017

Introduction: The Vogt-Koyanagi-Harada syndrome (VKHS) is rare in Europe. Bilateral panuveitis is the defining characteristic, but the disease can affect other tissues containing melanin, such as the inner ear, the meninges, and the skin. Therefore, patients may present not only to ophthalmologists, but also to internists, dermatologists, ENT-physicians and neurologists. Early and aggressive immunosuppressive treatment is necessary in order to prevent permanent visual loss or systemic complications.Objective: We retrospectively studied 12 patients diagnosed and treated in a specialized uveitis clinic in Leuven (Belgium) between 2005 and 2013, and we compared our data with literature.Results: The most common extra-ocular manifestations were neurological, with headache (100%) and lymphocytic meningitis (75%) as main findings. Tinnitus was present in 50%, and vertigo in 42%. Vitiligo was the most frequent dermatological manifestation and present in 42%. Uveitis recurred in 67% of patients with 1 to 4 relapses per patient and a median time to recurrence of 6 months (range 1-11). Normal visual acuity was seen in 75% of patients at the end of follow-up (5 to 60 months), but 3 patients had at least some degree of permanent visual impairment in at least one eye.Conclusion: VKHS is a rare, multisystem disorder, characterized by bilateral uveitis and variable neurologic, auditory and skin symptoms. A lumbar puncture increases the diagnostic yield. A fast diagnosis allows timely initiation of adequate therapy, and If treated correctly, VKHS has a favorable prognosis. It is unclear if initial intravenous therapy improves frequency and time to remission.
Comparing health workforce forecasting approaches for healthcare planning: The case for ophthalmologists
Authors: Ansah John P. , Koh Victoria , De Korne Dirk , Bayer Steffen , Pan Chong , Thiyagarajan Jayabaskar , Matchar David B. , Quek Desmond 
Published: May 2017

Health workforce planning is essential in the provision of quality healthcare. Several approaches to planning are customarily used and advocated, each with unique underlying assumptions. Thus, a thorough understanding of each assumption is required in order to make an informed decision on the choice of forecasting approach to be used. For illustration, we compare results for eye care requirements in Singapore using three established workforce forecasting approaches – workforce-to-population-ratio, needs based approach, utilization based approach – and a proposed robust integrated approach to discuss the appropriateness of each approach under various scenarios. Four simulation models using the systems modeling methodology of system dynamics were developed for use in each approach. These models were initialized and simulated using the example of eye care workforce planning in Singapore, to project the number of ophthalmologists required up to the year 2040 under the four different approaches. We found that each approach projects a different number of ophthalmologists required over time. The needs based approach tends to project the largest number of required ophthalmologists, followed by integrated, utilization based and workforce-to-population ratio approaches in descending order. The four different approaches vary widely in their forecasted workforce requirements and reinforce the need to be discerning of the fundamental differences of each approach in order to choose the most appropriate one. Further, health workforce planning should also be approached in a comprehensive and integrated manner that accounts for developments in demographic and healthcare systems.
Clinical, Research, and Public Health Implications of Poor Measurement of Vitamin D Status
Authors: Lucas Robyn M , Gorman Shelley , Black Lucinda , Neale Rachel E 
Published: May 2017

Abstract
There is widespread concern about the high prevalence of vitamin D deficiency amid evidence to support that such a state may increase the risk of a wide range of adverse health outcomes. Estimating the prevalence of deficiency, as well as establishing linksto health outcomes, requires the accurate and precise measurement of 25-hydroxyvitamin D [25(OH)D] in serum or plasma. Accurate measurement of 25(OH)D underlies the definitions of vitamin D deficiency, insufficiency, and sufficiency and, thus, prevalence estimates. Imprecise measurement of 25(OH)D in epidemiological research can result in incorrect null findingsof associations with disease. When associations withdisease are found, the inaccuracy of measurement forestalls defining the absolute level of 25(OH)D thatis associated with increased risk. For the clinician,both inaccuracy and imprecision are problematic, because clinical care is most often based on a single measurement to define vitamin D status. New initiatives to develop a standard reference method and the assignment of “true” values to samples provide a solution to these problems. The use of standardized assays in large population studies will allow comparisons to be made between populations and over time that have not previously been possible and will improve our understanding of the role of vitaminD in health and disease.
Simplified 25-Hydroxyvitamin D Standardization and Optimization in Dried Blood Spots by LC-MS/MS
Authors: Makowski Andrew J , Rathmacher John A , Horst Ronald L , Sempos Christopher T 
Published: May 2017

Abstract
Previous studies have assessed vitamin D status based on the 25-hydroxyvitamin D [25(OH)D] concentration measured in samples from dried blood spots (DBSs). In 40 individuals participating in a clinical study, we compared 25(OH)D levels measured from DBSs and in serum using an LC-MS/MS reference procedure in collaboration with the Vitamin D Standardization Program. The main objective was to simplify and optimize current methods to produce an assay that can be used as a screening tool for 25(OH)D concentration assessment without derivatization. The DBS 25(OH)D levels, compared to serum concentrations, were found to have 101% accuracy overall, and the correlation coefficient (r) was 0.83 (P &lt; 0.0001), with a significant linear relationship. Free 25(OH)D and vitamin D binding protein (VDBP) were assessed in the serum samples for potential correlations to the DBS calculations: the levels of free 25(OH)D had moderate to strong correlation to DBS and serum concentrations, with r values of 0.67 (P &lt; 0.0001) and 0.76 (P &lt; 0.0001), respectively. VDBP and hematocrit had no significant correlation to either DBS or serum sample types, with r values &lt;0.1. In conclusion, the useof two DBSs and an increase in DBS sample size improved overall sample representation without the need for derivatization, and produced an accurate and robust method that can be used to screen 25(OH)D levels.
The Welfare Quality® assessment protocol: how can it be adapted to family farming dual purpose cattle raised under extensive systems in tropical conditions?
Authors: Hernandez A , Berg C , Eriksson S , Edstam L , Orihuela A , Leon H , Galina C 
Published: May 2017

AbstractFamily farming is still the main source of income for many people in the tropical regions of the world. At the same time, modern society is quickly becoming more aware of the welfare of animals for human consumption. The main objective of this study was to illustrate the need to modify certain aspects of the original Welfare Quality® (WQ) protocols developed by the EU-funded WQ project, under the conditions of small community farmers in the tropics. Thirty-four dual purpose farms in the State of Chiapas, Mexico, which had their main production focus on milk but for whom beef production was also of significant value, were evaluated utilising a merged version of the WQ protocols for dairy and beef cattle. Based on their average score, the farms obtained at least an acceptable level in each indicator of welfare. However, after merging indicators from the dairy and beef cattle protocols of WQ in order to adjust it to the prevailing conditions in the tropics, a number of sections are not applicable. This is particularly true of the section related to good housing, where most of the items do not apply due to the absence of infrastructure; the farms obtained a very high score in this section but further studies to verify whether this reflects an accurate assessment of the welfare status should be carried out. In general, the approach of the WQ protocol was useful, however certain aspects are quite different from the conventional intensive farming systems predominantly used in Europe and there is a need to implement a number of modifications.
Assessing dairy cow welfare at the beginning and end of the indoor period using the Welfare Quality® protocol
Authors: de Graaf S , Ampe B , Tuyttens FAM 
Published: May 2017

AbstractThe Welfare Quality® (WQ) project developed protocols as international standards for farm animal welfare assessment. For dairy cattle, the WQ protocol may be performed any time during the indoor period when the herd has no access to pasture. However, timing of welfare assessments during the indoor period might influence the outcome, as pasture access influences many welfare aspects and such effects are likely to carry over to the beginning of the indoor period. In order to test this hypothesis, we assessed ten herds at both the beginning and end of the same indoor period. Assessment at the end of the indoor period resulted in a higher prevalence of the following welfare measures: severely lame cows, mild integument alterations, coughs per cow per hour, diarrhoea, and vulvar discharge. In addition, at the end of the indoor period, the mortality rate was higher and the Qualitative Behaviour Assessment (QBA) score was worse, but there were fewer cows with dirty udders and mean time to lie down was lower. This led to worse scores on the criterion and principle levels of WQ integration, but resulted in a lower welfare categorisation for one of the herds only. The better scores for several aspects of health and for the QBA at the beginning of the indoor period not only confirm the carryover of positive effects of access to pasture, but also imply a need for careful consideration of the timing and frequency of WQ assessments of herds that are housed outdoors for part of the year.
Mobile-Assisted Vocabulary Learning: A Review Study
Authors: Afzali Parichehr , Shabani Somayeh , Basir Zohreh , Ramazani Mohammad 
Published: May 2017

Mobile phones are becoming more acceptable toolkits to learn languages. One aspect of English language which has been subject to investigation in mobile assisted language learning (MALL) is vocabulary. This study reviewed some of the studies conducted in various contexts on the effect of MALL on vocabulary learning. We investigated some of the most prominent databases such as Science Direct, Wiley, Scopus and Oxford to find these studies; believing that this study can have pedagogical implications for future researchers and language teachers. We selected studies done in different countries such as Malaysia, Taiwan, Korea, China, Japan, Iran, Saudi Arabia, Turkey. Thirty studies were selected purposively in this way. Some of the main features of these studies are elaborated on in the discussion section. Pedagogical implications are discussed.
Diamagnetic depression observations at Saturn's magnetospheric cusp by the Cassini spacecraft
Authors: Jasinski Jamie M. , Arridge Christopher S. , Coates Andrew J. , Jones Geraint H. , Sergis Nick , Thomsen Michelle F. , Krupp Norbert 
Published: May 2017

AbstractThe magnetospheric cusp is a region where shocked solar wind plasma can enter a planetary magnetosphere, after magnetic reconnection has occurred at the dayside magnetopause or in the lobes. The dense plasma that enters the high‐latitude magnetosphere creates diamagnetic effects whereby a depression is observed in the magnetic field. We present observations of the cusp events at Saturn's magnetosphere where these diamagnetic depressions are found. The data are subtracted from a magnetic field model, and the calculated magnetic pressure deficits are compared to the particle pressures. A high plasma pressure layer in the magnetosphere adjacent to the cusp is discovered to also depress the magnetic field, outside of the cusp. This layer is observed to contain energetic He++ (up to ∼100 keV) from the solar wind as well as heavy water group ions (W+) originating from the moon Enceladus. We also find a modest correlation of diamagnetic depression strength to solar wind dynamic pressure and velocity; however, unlike at Earth, there is no correlation found with He++ counts.
Formation mechanisms of neutral Fe layers in the thermosphere at Antarctica studied with a thermosphere‐ionosphere Fe/Fe+ (TIFe) model
Authors: Chu Xinzhao , Yu Zhibin 
Published: May 2017

AbstractWith a thermosphere‐ionosphere Fe/Fe+ (TIFe) model developed from first principles at the University of Colorado, we present the first quantitative investigation of formation mechanisms of thermospheric Fe layers observed by lidar in Antarctica. These recently discovered neutral metal layers in the thermosphere between 100 and 200 km provide unique tracers for studies of fundamental processes in the space‐atmosphere interaction region. The TIFe model formulates and expands the TIFe theory originally proposed by Chu et al. that the thermospheric Fe layers are produced through the neutralization of converged Fe+ layers. Through testing mechanisms and reproducing the 28 May 2011 event at McMurdo, we conceive the lifecycle of meteoric metals via deposition, transport, chemistry, and wave dynamics for thermospheric Fe layers with gravity wave signatures. While the meteor injection of iron species is negligible above 120 km, the polar electric field transports metallic ions Fe+ upward from their main deposition region into the E‐F regions, providing the major source of Fe+ (and accordingly Fe) in the thermosphere. Atmospheric wave‐induced vertical shears of vertical and horizontal winds converge Fe+ to form dense Fe+ layers. Direct electron‐Fe+ recombination is the major channel to neutralize Fe+ layers to form Fe above ~120 km. Fe layer shapes are determined by multiple factors of neutral winds, electric field, and aurora activity. Gravity‐wave‐induced vertical wind plays a key role in forming gravity‐wave‐shaped Fe layers. Aurora particle precipitation enhances Fe+ neutralization by increasing electron density while accelerating Fe loss via charge transfer with enhanced NO+ and O2+ densities.
Spatial dependence of electromagnetic ion cyclotron waves triggered by solar wind dynamic pressure enhancements
Authors: Cho J.‐H. , Lee D.‐Y. , Noh S.‐J. , Kim H. , Choi C. R. , Lee J. , Hwang J. 
Published: May 2017

AbstractIn this paper, using the multisatellite (the Van Allen Probes and two GOES satellites) observations in the inner magnetosphere, we examine two electromagnetic ion cyclotron (EMIC) wave events that are triggered by Pdyn enhancements under prolonged northward interplanetary magnetic field quiet time preconditions. For both events, the impact of enhanced Pdyn causes EMIC waves at multiple points. However, we find a strong spatial dependence that EMIC waves due to enhanced Pdyn impact can occur at multiple points (likely globally but not necessarily everywhere) but with different wave properties. For Event 1, three satellites situated at a nearly same dawnside zone but at slightly different L shells see occurrence of EMIC waves but in different frequencies relative to local ion gyrofrequencies and with different polarizations. These waves are found inside or at the outer edge of the plasmasphere. Another satellite near noon observes no dramatic EMIC wave despite the strongest magnetic compression there. For Event 2, the four satellites are situated at widely separated magnetic local time zones when they see occurrence of EMIC waves. They are again found at different frequencies relative to local ion gyrofrequencies with different polarizations and all outside the plasmasphere. We propose two possible explanations that (i) if triggered by enhanced Pdyn impact, details of ion cyclotron instability growth can be sensitive to local plasma conditions related to background proton distributions, and (ii) there can be preexisting waves with a specific spatial distribution, which determines occurrence and specific properties of EMIC waves depending on satellite's relative position after an enhanced Pdyn arrives.
Pitfalls in modeling mantle convection with internal heat production
Authors: Korenaga Jun 
Published: May 2017

AbstractThe mantle of the Earth, and probably of other terrestrial planets as well, is heated from below and within. The heating mode of mantle convection is thus mixed heating, and it is also time dependent because the amount of heat‐producing isotopes in the mantle is steadily decreasing by radioactive decay and because the basal heat flux originating in the cooling of the core can vary with time. This mode of transient mixed heating presents its own challenges to the study of mantle convection, but such difficulties are not always appreciated in the recent literature. The purpose of this tutorial is to clarify the issue of heating mode by explaining relevant concepts in a coherent manner, including the internal heating ratio, the Urey ratio, secular cooling, and the connection between the thermal budget of the Earth and the geochemical models of the Earth. The importance of such basic concepts will be explained with some illustrative examples in the context of the thermal evolution of the Earth, and a summary of common pitfalls will be provided, with a possible strategy for how to avoid them.