bluuebunny/crossref_metadata_2025 huggingface dataset:
La flore du bassin lacustre miocène de Bés-Konak (Anatolie spetentrionale, Turquie)
Authors: Paicheler Jean-Claude , Blanc Charles P.
Published: September 2018

Le bassin lacustre de Bes-Konak est situé en Anatolie septentrionale, zone attribuée à la marge méridionale du continent européen. Ces dépôts continentaux, interstratifiés au sein des formations volcaniques du "Massif Galate d'Andésites" ont fourni un matériel paléontologique très riche.

Seuls les végétaux fossiles font l'objet de cette publication. Le grand nombre et la qualité de conservation des échantillons récoltés ont permis de mettre en évidence l'existence d'une flore très variée composée de plantes terrestres et aquatiques appartenant à plus de quatre vingts genres. L'étude systématique situe leur position dans l'échelle stratigraphique à l'oligo-Miocène et révèle les conditions climatiques et géographiques qui ont préludé à leur épanouissement.

Cette analyse met également en évidence la valeur relative des reconstitutions paléobiogéographiques et paléoclimatiques selon le matériel considéré (Pollens ou macroflore).
Miocene foraminiferal and calcareous nannoplankton assemblages from the Gulf of Suez region and correlation
Authors: El-Heiny Ihab , Martini Erlend
Published: September 2018

The analysis of samples belonging to the Nukhul, Rudeis, Kareem and Belayim Formations (Miocene age), collected from the south-western flank of the Gulf of Suez, yielded the establishment of the following foraminiferal biozones mentioned from bottom to top : Globigerinoides altiaperturus (N. 6), Globigerinoides trilobus trilobus (N. 7), Globigerinoides sicanus (N. 8), Praeorbulina glomerosa (N. 8), Orbulina suturalis-Globorotalia fohsi peripheroronda (N. 9-10) and Globorotalia siakensis (N. 11).

Calcareous nannoplankton assemblages in the Rudeis and Kareem Formations of the Gulf of Suez region can be placed in standard nannoplankton zones NN 3 (Sphenolithus belemnos zone) to NN 5 {Sphenolithus heteromorphus zone). Correlations with the Mediterranean, the Paratethys and northern Europe indicate well developed connections between these areas during the late Lower Miocene and the early Middle Miocene.
Bactéries des saumures et des sédiments des marais salants de Salin-de-Giraud (Sud de la France)
Authors: Cornée Annie
Published: September 2018

Une étude microbiologique a été entreprise sur les saumures libres et interstitielles et sur les sédiments dans le marais salant de Salin-de-Giraud afin d'estimer l'importance des populations bactériennes et les répercussions que leur activité peut avoir sur les processus sédimentologiques et diagénétiques dans un milieu qui semble à placer parmi les systèmes actuels les plus productifs en matière organique.

Dans les saumures libres, les bactéries hétérotrophes aérobies sont plus abondantes que dans l'eau de mer. On a noté une ten¬ dance à l'augmentation du nombre de bactéries avec les salinités croissantes. Au-delà de 250-300 g/1, les bactéries hétérotrophes halophiles sont remplacées par les hyperhalophiies qui présentent alors un développement considérable (106 à 107 germes/ml), ce qui correspond à une biomasse très importante. Dans les saumures interstitielles, les valeurs obtenues sont intermédiaires entre celles des saumures libres et celles trouvées dans les sédiments associés. Dans les tapis algaires (correspondant à des saumures dont la salinité est comprise entre 55 et 150 g/1), les différents groupes de bactéries sont abondants, en particulier dans la couche supérieure vivante de ces tapis. A partir de la précipitation du gypse (saumures à plus de 150 g/1), on note en général, dans les sédiments, une diminution des quantités de bactéries, probablement liée à l'abaissement de la production algale et donc de la matière organique disponible pour les bactéries. Sous les croûtes de gypse néanmoins, les bactéries restent abondantes précisément au niveau des couches organiques verte et rose à la base des cristaux. Du point de vue sédimentologique, les bactéries sulfato-réductrices sont intéressantes et leur liaison avec la destruction très rapide du gypse (quelques cm à 20 cm) paraît établie, suggérant un rôle de ces microorganismes dans ce phénomène. Ces résultats de culture ont été confirmés et complétés par des observations au M.E.B. qui ont permis de préciser la localisation et les rapports entre les bactéries et les différents éléments organiques et non organiques des sédiments.
De la mer au sel : les faciès superficiels des marais salants de Salin-de-Giraud (Sud de la France)
Authors: Geisler Dominique
Published: September 2018

Cette approche sédimentologique du marais salant de Salin-de-Giraud ne concerne que les dépôts superficiels liés à l'activité propre du salin. Ils sont abordés dans un ordre de salinité croissante : tapis algaires, dépôts gypseux et halitiques.

Une observation fine, voire nanoscopique, permet de cerner l'agencement séquentiel des phases sédimentaires : détritique, organique et chimique et à partir de là d'appréhender les mécanismes de dépôt pour lesquels l'assèchement hivernal presque total du salin, les mouvements des eaux introduisant des variations de salinité et les apports détritiques apparaissent comme les facteurs essentiels.

Enfin, le gypse et la halite sont considérés d'un point de vue cristallogénétique et géochimique. L'étude de la croissance cristalline est principalement fondée sur la répartition des inclusions dans les cristaux. La géochimie du strontium dans le gypse et du brome dans la halite permet de mettre en évidence une relation étroite entre la distribution de ces éléments dans les cristaux et la salinité des saumures. L'analyse des fluides piégés dans les inclusions des halites montre leur représentativité des saumures génératrices des cristaux.
Les Vertébrés dévoniens de la nappe supérieure d'Antalya (Taurus Lycien occidental, Turquie)
Authors: Janvier Philippe
Published: September 2018

A vertebrate fauna, referred here to the Famennian, has been discovered in the red sandstone which forms the base of the Upper Antalya Nappe (Western Lycian Taurus), Turkey). This Fauna consists of placoderms (Ptyctodontida, Holonernatidae, Groenlandaspididae, Bothriolepididae, Phyllolepida), elasmobranchs («Cladodus»), acanthodians (Ischnacanthiformes), osteolepiforms (Megalichthyinae) and lungfishes (Dipterus , ? Oervigivia). The presence of phyllolepids indicates a relatively high stratigraphical position within the Upper Devonian for this locality. This placo-derm group is known only from the Famennian in Europe and North America, but may occur as early as the Givetian in Austra¬ lia.
Halocinèse et dispositifs d'extrusion de Trias dans l'Atlas saharien oriental (NE algérien)
Authors: Aoudjehane Mohamed , Bouzenoune Azzedine , Rouvier Henri , Thibieroz Jacques
Published: September 2018

La plupart des dispositifs extrusifs de l'Atlas saharien oriental présentent une morphologie en dôme percé à cœur triasique. Allongés NE-SW sur plusieurs kilomètres, ils sont flanqués à leurs extrémités par des périclinaux redressés de calcaires massifs bioclastiques à construits, d'âge albo-aptien. Sur les flancs latéraux de certains appareils s'individualisent une charnière antiforme aigiie et une synforme plus externe, toutes deux renversées sur les séries comprimées et déversées du Crétacé supérieur. L'allure en champignon à flancs renversés est ébauchée, à l'image du Slata et du Mesloula, avant le Vraconien transgressif, discordant, dont la base est marquée par un conglomérat à fragments de roches triasiques. L'orogenèse tertiaire finit de modeler ces dispositifs. Elle en exagère les extiavasions, lesquelles engendrent des contacts anormaux chevauchants et centrifuges et le déversement des formations post-albiennes. Dans le cœur des extrusions, les dissolutions intéressant le piston salifère central induisent des phénomènes de collapse qui pourraient expliquer les amoncellements de couverture cénomano-turonienne entourés de Trias. La tectogenèse tertiaire est, de plus, susceptible de compliquer la simplicité relative de ces dispositifs à mesure que l'on se rapproche de la zone des nappes, au Nord et au NW.

Les principales minéralisations à Pb-Zn et Fe sidéritique de l'Atlas saharien oriental sont localisées autour des diapirs. Elles sont portées par les formations carbonatées albo-aptiennes de l'enveloppe sédimentaire immédiate des extrasions. Elles sont ainsi, strictement contrôlées par les aires diapiriques, près des croisements diapirs-fossés. L'anatomie des dispositifs d'extrusion devient, de ce fait, un paramètre d'importance capitale pour la prospection minière dans cette partie de l'Atlas saharien oriental.
Relais d'accidents décrochants et structures héritées. Cas des structures plissées subméridiennes en Tunisie centro-orientale
Authors: Saadi Moussa , Turki Mohamed Moncef
Published: September 2018

L'analyse des structures associées aux relais d'accidents décrochants dans les régions d'Enfida, Sbikha, Ain Jelloula et Jebel Bargou (Tunisie centro-orientale) permet d'attribuer à la même phase de plissement les deux directions majeures caractérisant les axes de plis : la direction NE-SW, dite atlasique en Tunisie, et la direction subméridienne. C'est en effet, au Tortonien, lors de la phase atlasique, caractérisée par un raccourcissement NW-SE, que se sont développées ces deux directions axiales en relation avec le jeu de failles, de direction NI 20-140, agencées en un système de relais gauches dextres et des failles de direction N-S. La plate-forme de la Tunisie centro-orientale est soumise, depuis au moins le Crétacé inférieur, à l'influence de ces accidents NW-SE et N-S.
Analyse séquentielle d'un nouveau gisement de poissons fossiles du Messinien marin diatomitique : Masseria il Salto près de Caltagirone (Province de Catane, Sicile)
Authors: Gaudant Jean , Caulet Jean-Pierre , Di Geronimo Italo , di Stefano A. , Fourtanier Elisabeth , Romeo M. , Vénec-Peyré Marie-Thérèse
Published: September 2018

Un nouveau gisement de poissons fossiles est décrit dans le Messinien diatomitique des environs de Caltagirone (Province de Catane, Sicile). Pour la première fois est réalisée l'étude pluridisciplinaire d'un gisement fossilifère dont l'ichthyofaune est constituée pour près des 3/4 par des Myctophidae. Les diatomées, les foraminifères planctoniques et benthiques, les nannofossiles calcaires et les radiolaires sont examinés en même temps que l'ichthyofaune. Cette étude conduit à mettre en évidence des indices d'upwellings, ce qui confirme l'hypothèse avancée précédemment par le premier auteur pour expliquer la formation des gisements de poissons fossiles messi-niens dans lesquels les Myctophidae sont prédominants.
Biostratigraphie (Foraminifères) et contrôle tectono-sédimentaire du Crétacé supérieur dans la région de Mejez El Bab (Tunisie septentrionale)
Authors: Rami A. , Zaghbib-Turki Dalila , El Ouardi H.
Published: September 2018

Biostratigraphy (Foraminifera) and tectonic control in the Upper Cretaceous series of Mejez El Bab area (Northern Tunisia).

The biostratigraphical analysis of the Cretaceous series which out crops in the Mejez el Bab area (Northern Tunisia) is based on the Foraminifera distribution found into numerous sections taken in this area (Jebel Kechtilou, Sidi Mohamed Akermi, Jebel Bou Rahal). This analysis permits to precise chronostratigraphy of different beds and to prove some thickness and fades changes and sedimentary hiatus in these area cretaceous series,

The fades and thickness changes and the sedimentary hiatus would be linked to an active synsedimentary tectonics. The last one had structured the sedimentary substratum in horsts and grabens. In the first structures numerous sedimentary hiatus and thickness decrease are observed. In the second structures (grabens), the Vraconian-Coniadan series are thick, complete and continuous such as in Sidi Mohamed Akermi location ; there, we have recognized all biozona of the Vraconian up to Coniacian stage. However, in Jebel Bou Rahal and Kechtilou (Koudiat ed-Damous), the Vraconian-Coniacian series are thin and occur some sedimentary hiatus such as the Early and Middle Cenomanian, of the Late Turanian to Early Coniacian or only the Early Coniacian. These thickness decrease and sedimentary hiatus are underlined especially in some shoals limited by submeridian, N40 to N70 and N140 faults. Nevertheless, in Jebel Bou Rahal was developped intraformational breccia deposited during the Upper Cenomanian to the Middle Turanian.
Structure of West Timor (East Indonesia) along a north-south cross section
Authors: Villeneuve Michel , Harsolumakso A.H. , Cornée Jean-Jacques , Bellon Hervé
Published: September 2018

A structural pattern of the central part of West Timor has been constructed along a North-South geological transect from Wini to Kolbano. Two main tectonic events have been distinguished :

-thrusting of the allochton units over the Australian continental margin during the Oligocene. TTiis thrusting brought metamorphic, ophiolitic and volcano-sedimentary units of northern origin (allochton units) on top of the sedimentary formations which filled up the Australian passive margin (lower para-autochton units) ;

-collision beetwen a northern island arc and the previous Timor fore-arc units at the end of the Early Pliocene (around 3 Ma). This collisional tectonic event reworked the Oligocene structures (lower para-autochton and allochton units) and the Mio-Pliocene volcano-sedimentary formations (upper para-autochton units) and thus is responsible of the present imbricated structures ;

-alternating with the compressional periods, two tectonic extensio-nal periods have been evidenced. The first one is Late Oligocene or very Early Miocene, the second one is Upper Pliocene.

From the South to the North, imbricated sheets include parts of the para-autochton or allochton units. The thrusts separating the imbricated structures in the para autochton are rooted in one main decollement level, namely the Triassic to Early Jurassic black shales. The matrix of tectonic melanges in the sole of the allochton nappes is essentially made of the Late Cretaceous to Early Paleocene red calcilutites.

All the observations favour a "thin skin structure" above a "decollement zone" at least for the Northern allochthon and para autochthon blocks. A "horst and graben" structure below the "decollement zone" is proposed to explain the stratigraphie differences within the tectonics sheets.
Benthic foraminiferal assemblages from the Ombrone and Tiber deltas (Central Tyrrhenian Sea) : a premiminary comparison
Authors: Carboni M.G. , Bellotti Piero , Bergamin L. , Di Bella L. , Matteucci R.
Published: September 2018

Les assemblages de foraminifères benthiques des deltas de l'Ombrone et du Tibre (Mer Tyrrhenienne centrale) : comparaison préliminaire. Dans ce travail on a reporté les données préliminaires d'une recherche concernant les associations à foraminifères benthiques des deltas des fleuves Ombrone et Tibre (Mer Tyrrhénienne centrale). Les dix échantillons choisis pour représenter les zones étudiées ont été prélevés à des profondeurs comprises entre 11-154 m pour le delta de l'Ombrone et entre 10-150 m pour le delta du Tibre.

On a reconnu trois associations principales à foraminifères benthiques se référant à la variation de la profondeur et aux caractéristiques sédimentaires du fond.

Seulement les associations plus profondes sont semblables dans les deux deltas tandis que celles de l'habitat côtier indiquent, pour le delta de l'Ombrone, des conditions de stress écologique. En effet sont abondantes les espèces infaunales qui s'adaptent aux milieux peu oxygénés et avec beaucoup de matière organique. La présence de ces espèces qui vivent généralement sur les fonds plus profonds, peut s'expliquer par de longues périodes de circulation limitée des eaux due à la position géographique du delta de l'Ombrone. D'autres détails (l'énergie de la mer et les vents) confirment les différentes situations des deux deltas.
Typologie chimique des phosphates du gisement de Djemi-Djema -bassin de Djebel Onk (Algérie orientale)
Authors: Mezghache Hamid , Hani A.
Published: September 2018

Les minerais de phosphates contiennent des impuretés telles que les carbonates, la silice et la matière organique ainsi que certains éléments tel que l'uranium en tant que sous-produit qu'il convient d'éliminer. Afin d'en tenir compte dès l'exploitation et d'adopter la méthode d'enrichissement la plus appropriée, il est nécessaire d'établir la typologie chimique des minerais et leurs répartitions dans le sous-sol même.

Pour le gisement de phosphate de Djemi Djema qui est situé dans le bassin de Djebel Onk en Algérie orientale, cette typologie chimique a été faite à l'aide de traitements statistiques mono et multivariables des données chimiques (P2O5, CO2, CaO, MgO, Fe2O3, SiO2, Résidu Insoluble RI et U) des échantillons de carottes. Ces échantillons ont été prélevés dans la couche phosphatée principale qui a une épaisseur moyenne de 30 m et est située dans le Thanétien supérieur. Quatre principaux types de minerais ont été mis en évidence et localisés dans ce gisement. Sur la base de cette typologie, un essai de détermination de leurs exogangues a eu lieu. La relation de l'élément U avec les autres éléments dosés et sa répartition dans ces minerais ont été étudiées. Il en ressort que, dans trois types de minerais, cet élément se localise essentiellement dans la matière phosphatée et que dans le quatrième, il se localise principalement dans l'exogangue. Ces conclusions permettent de prévoir à quel niveau il peut y avoir une pollution par U : au niveau du complexe d'enrichissement lors de l'exploitation du type de minerai dont U est associé essentiellement à l'exogangue et au niveau des usines de transformation lorsque ce sont les trois autres types de minerais qui sont exploités.
TOWARDS CLUSTERS’ PERFORMANCE EVALUATION: THE SYSTEM OF INDICATORS
Authors: Razminienė Kristina , Tvaronavičienė Manuela
Published: September 2018

This paper is composed to specify the indicators identified by scholars used for cluster performance, efficiency or competitiveness assessment. Traditional bibliometric technique was chosen to identify the trends in cluster literature. Articles from the Web of Science database were selected according to the times they were cited which allowed systemizing the aspects of the research and making valuable observations. A system of indicators which should get the most attention in cluster research was com-posed identifying exceptionally important points to discuss and include in the following studies. In the national level clusters usually are not able to compare their performance for there is no system creat-ed to serve this purpose. The close analysis of the indicators of cluster performance would enable cluster evaluation tool formation for cluster performance evaluation in national level.
ASSESSMENT OF IMPACT OF FORMAT OF RETAIL INTERNATIONALIZATION ON CONSUMER ATTITUDE
Authors: Rudienė Elzė , Morkūnas Mangirdas , Skvarciany Viktorija
Published: September 2018

The format is one of the essential elements of retail internationalization process. In order to date, cus-tomer attitude about retail companies format entering the market and their possible impact upon consumers and standardization degree has not frequently been the object of investigation within the internationalisation of retail trade. Only by opening the subject of trade consumers and customers can find the solution of components of this element. The current paper explores consumer attitudes to retail format, revealed this element components and provide their evaluation methodology. The prac-tical significance of the current research is that it is a survey of consumer attitude to the company en-tering format the market in another country, which would enable a potential retail entrant to know the expectations of consumers and thus take appropriate decisions. The methodological basis for the pre-sent paper is an analysis of reference material on the internationalisation of retail trade examining cases of successes and failures of retail companies, exploring and understanding consumer expecta-tions and the ways to meet such expectations, as well as peculiarities of entering different markets. The authors interviewed Lithuanian consumers (more than 600) about the IKEA shopping centre be-fore its opening in Vilnius and one year after opening. Studies have confirmed that consumers have their attitudes of the IKEA shopping centre, as the format element.
MULTI-LAYERED MODEL OF E-LOGISTIC
Authors: Al Majzoub Mohamad , Davidavičienė Vida
Published: September 2018

Coordinating transactions among companies that allow the appropriate movement of goods, services, and information to consumers from suppliers effectively and efficiently still is hard to accomplish. There are many situations in which the logistic performance failed, frequently because of the difficul-ty of synchronising the business technological systems with the logistic processes, thereby yielding disastrous consequences. Thus causing the loss of time, money, and even certain companies could close and will be weeded out if they do not cope with application of e-logistics while performing their business. This article presents discussion of e-logistics and its application in e-commerce. The applica-tion of innovative solutions in logistics will yield posititve outcomes that will help improve the compa-ny’s overall performance. The consumer satisfaction by e-commerce will be taken in consideration, and in particular by e-logistic solutions. Such methods as literature review, synthesis and and compar-ison wil be employed.
CHOOSING THE MOST ECONOMICALLY ADVANTAGEOUS SOLUTION TO THE DECISION OF THE ISSUE
Authors: Keršulienė Violeta , Butkienė Jūratė
Published: September 2018

Countries in conflict, trying to make a resolution, encounter a decision process. Often, in practice deci-sions are made based on groundless rationalization, therefore it is commonly believed that it is experi-ence and intuition that are key to the decision making process. Since decisions in law are usually based on logical reasoning, taking into account conflict circumstances and facts, the success of this decision can be determined with mathematical calculation. In recent decades, as the boundries be-tween scholarly disciplines blur, new ones are formed, which are not entirely indepedent, but bring in new research methods. Law and economics is a clear example of this interdisciplinery relation. The law system impacts the economical atmosphere, therefore before taking decision in law, economical aspects must be evaluated. Striving to resolve the disputes between parties at work mathematical cal-culations are used in order to analyze the expected behaviour of each party. Guidance for parties having dispute is the most economically viable option for completing the dispute.
CONCEPTUAL NEW SERVICE DEVELOPMENT MODEL
Authors: Skačkauskienė Ilona , Radzevičienė Asta , Švogžlys Povilas
Published: September 2018

In order to stand out in a competitive environment, companies are forced to consider the develop-ment of new services. In the context of globalization changes, the development of new services is be-coming an effective tool for adapting to the changing needs of consumers through the introduction of technological innovations or management solutions. By using service development models, compa-nies create favourable environment for generating and selecting ideas, and can prepare more effec-tively for the deployment of a new service. After the critical evaluation of the new service develop-ment models, conceptual new service development model was formulated. The indicators of concep-tual new service development model were presented, also the unique features were highlighted. The results of this research revealed that new service development models are perceived as an unbroken cycle, that includes additional tasks for business subjects, consumers and company employees.
METHODS OF SERVICE QUALITY ASSESSMENT – PRELIMINARY RESULTS OF SURVEY FOR ENTERPRISES
Authors: Ingaldi Manuela
Published: September 2018

There are many service enterprises on the market, which offers different type of services practically every day. Quality assessment of such services is very difficult. There are many methods that can be used in such a situation, but it should be emphasized that in such researches customers’ opinions are usually used. The purpose of the paper is to present a survey on the use of methods of service quality assessment. In the paper preliminary results of the survey from point of view of the service enterprises are presented. The enterprises were asked to indicate what methods they used, what information they received thanks to such research, what happened to the obtained results and what problems they en-countered. Preliminary research was carried out between September and December 2017. The re-search will be continued throughout 2018. At the same time, the research is conducted from the point of view of the customers of such enterprises. The final results of the research will help the service en-terprises to choose right research method and can be used by various service companies.
INTEGRATED ASSESSMENT OF THE CREDIT POLICY EFFICIENCY
Authors: Vanchukhina Lyubov , Leybert Tatyana , Rudneva Yulia , Galeeva Nelli , Rogacheva Anastasia , Khalikova Elvira , Ciras Giedrius
Published: September 2018

The credit policy is a basis of receivables management. The competent combination of its parameters allows to increase a greater effect of commercial crediting applying by the company. The purpose of this study is to develop a methodology for assessing the effectiveness of various credit policy types: conservative, moderate and aggressive. The comparative analysis of three methods of assessment of the credit policy efficiency is carried out in the article: The NPV analysis, the valuation model based on the average daily margin and the model for assessing the impact of changes in the company’s credit policy. As a result, the technique of the full and quick estimate methods of the credit policy ef-ficiency, including calculation of individual, intermediate and integrated indicators are offered. The method is based on three groups of the indicators, reflecting the company credit policy efficiency in the following directions: quality receivables management, receivables costs maintenance and influ-ence on a company financial condition. The influence of each of the indicator and indicators groups when using different credit policy’s types were proved in the article and that allowed to transform them to a general integrated indicator. This technique allows to estimate in a complex and objectively efficiency of the credit policy operating in the company.
INFLUENCE OF MACROECONOMIC FACTORS ON STOCK PRICES IN POLAND – CROSS SECTION AND TIME SERIES ANALYSIS
Authors: Schabek Tomasz , Maknickienė Nijolė
Published: September 2018

The purpose of the study is to determine if the macroeconomic factors influence rates of returns from broad index of stocks in Poland. The study investigates stability of relation between macroeconomic and stock market variables in short and long time period. After running time series regressions we check if selected macro variables are still significant in cross-section of stock returns including control variables like price to book value, capitalization and momentum. The study is based on large sample of individual rates of returns and macroeconomic variables describing real sphere of the economy. Mine findings suggest that the short and long term relation is statistically and economically significant although not stable in the both analysed time horizons. Macroeconomic beta parameter (sensitivity to macro variables measure) is not significant in cross-sectional test proving that traditionally accepted variables (in our study only price to book-value and momentum) still better explain the expected re-turns.
The Rich Dynamics of Jupiter’s Great Red Spot from JunoCam: Juno Images
Authors: Sánchez-Lavega A. , Hueso R. , Eichstädt G. , Orton G. , Rogers J. , Hansen C. J. , Momary T. , Tabataba-Vakili F. , Bolton S.
Published: September 2018

We have used high-resolution images obtained with JunoCam onboard the Juno spacecraft during its close flyby of Jupiter on 2017 July 11, to study the dynamics of the Great Red Spot (GRS) at the upper cloud level. We have measured the horizontal velocity and vorticity fields using the clouds as tracers of the flow. We have analyzed a variety of cloud morphologies that serve to characterize different underlying dynamic processes. Long undulating dark gray filaments (2000–10000 km) circulate around the outer part of the vortex moving at high speed (∼120–140 m s−1) where mesoscale waves (wavelength 75 km) indicate stable conditions in this region. At mid distance from the center, a large eddy (radius ∼500 km) is observed in a region of intense horizontal wind shear whereas on the opposite side, compact cloud clusters with cell sizes of ∼50 km, indicative of shallow convection, are observed. The core of the GRS (∼5000 × 3000 km2) is turbulent where the circulation has weakly cyclonic and anticyclonic regions. This variety of phenomena occurs in the upper ammonia cloud layer and haze (thickness ∼20–50 km) that represents the top of a dynamical system with a much deeper circulation.
A High-resolution Mosaic of the Neutral Hydrogen in the M81 Triplet
Authors: de Blok W. J. G. , Walter Fabian , Ferguson Annette M. N. , Bernard Edouard J. , Hulst J. M. van der , Neeleman Marcel , Leroy Adam K. , Ott Jürgen , Zschaechner Laura K. , Zwaan Martin A. , Yun Min S. , Langston Glen , Keating Katie M.
Published: September 2018

We present a 3° × 3°, 105-pointing, high-resolution neutral hydrogen (H i) mosaic of the M81 galaxy triplet, (including the main galaxies M81, M82, and NGC 3077, as well as dwarf galaxy NGC 2976) obtained with the Very Large Array C and D arrays. This H i synthesis mosaic uniformly covers the entire area and velocity range of the triplet. The observations have a resolution of ∼20″ or ∼420 pc. The data reveal many small-scale anomalous velocity features highlighting the complexity of the interacting M81 triplet. We compare our data with Green Bank Telescope observations of the same area. This comparison provides evidence for the presence of a substantial reservoir of low-column density gas in the northern part of the triplet, probably associated with M82. Such a reservoir is not found in the southern part. We report a number of newly discovered kpc-sized low-mass H i clouds with H i masses of a few times 106
M
⊙. A detailed analysis of their velocity widths show that their dynamical masses are much larger than their baryonic masses, which could indicate the presence of dark matter if the clouds are rotationally supported. However, due to their spatial and kinematical association with H i tidal features, it is more likely that the velocity widths indicate tidal effects or streaming motions. We do not find any clouds that are not associated with tidal features down to an H i mass limit of a few times 104
M
⊙. We compare the H i column densities with resolved stellar density maps and find a star formation threshold around 3–6 × 1020 cm−2. We investigate the widths of the H i velocity profiles in the triplet and find that extreme velocity dispersions can be explained by a superposition of multiple components along the line of sight near M81 as well as winds or outflows around M82. The velocity dispersions found are high enough that these processes could explain the linewidths of damped-Lyα absorbers observed at high redshift.
The Correlation of Synthetic UV Color versus Mg ii Index along the Solar Cycle
Authors: Criscuoli Serena , Penza Valentina , Lovric Mija , Berrilli Francesco
Published: September 2018

UV solar irradiance strongly affects the chemical and physical properties of the Earth’s atmosphere. UV radiation is also a fundamental input for modeling the habitable zones of stars and the atmospheres of their exoplanets. Unfortunately, measurements of solar irradiance are affected by instrumental degradation and are not available before 1978. For other stars, the situation is worsened by interstellar medium absorption. Therefore, estimates of solar and stellar UV radiation and variability often rely on modeling. Recently, Lovric et al. used Solar Radiation and Climate Experiment (SORCE)/Stellar Irradiance Comparison Experiment (SOLSTICE) data to investigate the variability of a color index that is a descriptor of the UV radiation that modulates the photochemistry of planets’ atmospheres. After correcting the SOLSTICE data for residual instrumental effects, the authors found the color index to be strongly correlated with the Mg ii index, a solar activity proxy. In this paper, we employ an irradiance reconstruction to synthetize the UV color and Mg ii index with the purpose of investigating the physical mechanisms that produce the strong correlation between the color index and the solar activity. Our reconstruction, which extends back to 1989, reproduces very well the observations, and shows that the two indices can be described by the same linear relation for almost three cycles, thus ruling out an overcompensation of SORCE/SOLTICE data in the analysis of Lovric et al. We suggest that the strong correlation between the indices results from the UV radiation analyzed originating in the chromosphere, where atmosphere models of quiet and magnetic features present similar temperature and density gradients.
Multiple Rings in the Transitional Disk of GM Aurigae Revealed by VLA and ALMA
Authors: Macías Enrique , Espaillat Catherine C. , Ribas Álvaro , Schwarz Kamber R. , Anglada Guillem , Osorio Mayra , Carrasco-González Carlos , Gómez José F. , Robinson Connor
Published: September 2018

Our understanding of protoplanetary disks is rapidly departing from the classical view of a smooth, axisymmetric disk. This is in part thanks to the high angular resolution that (sub)millimeter observations can provide. Here, we present the combined results of Atacama Large Millimeter/submillimeter Array (ALMA) (0.9 mm) and Very Large Array (VLA) (7 mm) dust continuum observations toward the protoplanetary disk around the solar analog GM Aur. Both images clearly resolve the ∼35 au inner cavity. The ALMA observations also reveal a fainter disk that extends up to ∼250 au. We model our observations using two approaches: an analytical fit to the observed deprojected visibilities, and a physical disk model that fits the spectral energy distribution as well as the VLA and ALMA observations. Despite not being evident in the deconvolved images, the VLA and ALMA visibilities can only be fitted with two bright rings of radii ∼40 and ∼80 au. Our physical model indicates that this morphology is the result of an accumulation or trapping of large dust grains, probably due to the presence of two pressure bumps in the disk. Even though alternative mechanisms cannot be discarded, the multiple rings suggest that forming planets may have cleared at least two gaps in the disk. Finally, our analysis suggests that the inner cavity might display different sizes at 0.9 and 7 mm. This discrepancy could be caused by the presence of free–free emission close to the star at 7 mm, or by a more compact accumulation of the large dust grains at the edge of the cavity.
Soft Tissue Pathology Detected By Ultrasound Seem To Be Risk Factors for Painful Flare in Osteoarthritic Knee
Authors: Mosalem Douaa M. , Alghunaim Shothour M. , Shehab Diaa K. , Baqer Ayyoub B. , Alfeeli Aziz K. , Ahmed Mohieldin M.
Published: September 2018

BACKGROUND: To our knowledge, the importance of US findings, pain (brief pain inventory (BPI)) and disability in osteoarthritic knee (OA) pain patients remain uncertain.
AIM: The objectives are to evaluate the correlation of US findings, pain (brief pain inventory (BPI)) and disability in OA pain patients.
MATERIALS AND METHODS: Eighty - three patients with OA knee were divided into two groups. The first group was OA as symptomatic knee group and the second group was an asymptomatic control group. The maximum sagittal height of synovial fluid in 12 scans at 0, 30, 60 and 90 degrees flexion knee in 3 major recesses were measured.
RESULTS: There were a significant positive correlation between BPI Pain severity index, or BPI function interference index and a maximum height of effusion at 30-degree flexion angle in a supra-patellar recess in painful symptomatic knees. But, there was a significant negative correlation between BPI Pain severity index, and BPI function interference index and cartilage thickness in painful symptomatic knees.
CONCLUSION: The increase of maximum height of synovial effusion at different angles of knee and decrease of cartilage thickness associated with pain and disability in OA pain patients and are being predictors for pain severity and disability in OA pain patients.
The Effect of Pregnancy on Disease Activity in Patients with Psoriatic Arthritis
Authors: Berman Mark , Zisman Devy , Wollman Jonathan , Levartovsky David , Rimon Eli , Elkayam Ori , Paran Daphna
Published: September 2018

Objective.

To evaluate the effect of pregnancy on disease activity in psoriatic arthritis (PsA).

Methods.

This is a retrospective case series. Review of the medical files of all female patients followed at the PsA clinic of 2 medical centers identified those with at least 1 pregnancy during followup and 1 visit during or soon after pregnancy.

Results.

Twenty-five women with PsA (out of 107 women of reproductive age followed up in our PsA clinics) and 35 pregnancies were enrolled. Thirty-three pregnancies resulted in live healthy babies. In the whole group, there was no significant change in disease activity throughout pregnancy, while in 16 (48%) of pregnancies, patients worsened during the first postpartum year. In 15 out of 21 pregnancies, in which the women had been treated before conception with biologics, treatment was discontinued close to pregnancy or during the first trimester. Five of those 15 patients had been classified as having mild to severe PsA activity prior to pregnancy. That number increased to 8, 9, and 14 during the first and second trimesters and postpartum period, respectively. There was no significant change in degree of disease activity in 6 patients whose biologics were continued beyond the first trimester. Improvement in disease activity was observed during pregnancy among the nonbiologics-treated patients. Corticosteroids were initiated or the dosage was increased during 6 pregnancies, all involving patients whose biologics were stopped before pregnancy.

Conclusion.

Continuation of biologics therapy was associated with a low level of disease activity and a low probability of flare during pregnancy. Stopping treatment with biologics before pregnancy is associated with flare during pregnancy and the postpartum period.
Association of Medication Beliefs, Self-efficacy, and Adherence in a Diverse Cohort of Adults with Rheumatoid Arthritis
Authors: McCulley Caroline , Katz Patricia , Trupin Laura , Yelin Edward H. , Barton Jennifer L.
Published: September 2018

Objective.

Rheumatoid arthritis (RA) patients’ adherence to disease-modifying antirheumatic drugs (DMARD) is often suboptimal. We examined associations among medication beliefs, self-efficacy, and adherence to medications in RA.

Methods.

Data were from a longitudinal observational cohort of persons with RA. Subjects completed telephone interviews on self-reported adherence, self-efficacy, demographics, and the Beliefs about Medicines Questionnaire (BMQ), which assesses beliefs in necessity and beliefs about taking medication. Bivariate and multivariate logistic regression identified correlates of poor adherence to synthetic DMARD and prednisone as well as to biologic therapy, including medication concerns and necessity.

Results.

There were 362 patients who reported taking a synthetic DMARD and/or prednisone. Of these, 14% and 21% reported poor adherence to oral DMARD or prednisone, and biologics, respectively. There were 64% who reported concern about taking medicines, 81% about longterm effects, and 47% about becoming too dependent on medicines. In multivariate analyses, the BMQ necessity score was independently associated with better adherence to oral DMARD or prednisone (adjusted OR 0.61, 95% CI 0.41–0.91), while self-efficacy was associated with greater odds of poor adherence to oral medications (adjusted OR 1.23, 95% CI 1.01–1.59). Beliefs in medicines and self-efficacy were not associated with adherence to biologics.

Conclusion.

In a diverse cohort of patients with RA, stronger beliefs in the necessity of medication were associated with better adherence to oral DMARD or prednisone, while higher self-efficacy was associated with poor adherence. Providers can play important roles in eliciting patient beliefs about medications to improve adherence and ultimately health outcomes.
Zakaria Koné et les transformations des chasseurs dozos en Côte d’Ivoire
Authors: Hellweg Joseph , Médevielle Nicolas
Published: September 2018

Bien que les concepts de société civile et d’État indiquent des positions sociales alternatives s’ancrant dans des institutions et des comportements différents, l’histoire récente de la Côte d’Ivoire révèle leur commune appartenance à une stratégie politique unique. Cette stratégie consiste à osciller entre ces deux positions suivant les circonstances et opportunités se présentant. Aucun groupe, sans doute, n’illustre mieux ce scénario que celui des chasseurs initiés dozos , et plus particulièrement l’un des plus célèbres d’entre eux, Zakaria Koné, dont la carrière a connu de nombreux balancements entre ces deux positions. Koné et les dozos incarnent le modus operandi de la vie politique ivoirienne contemporaine.
Le boom de l’anacarde dans le bassin cotonnier du Nord ivoirien
Authors: Bassett Thomas J.
Published: September 2018

Le paysage agricole des régions de la savane ivoirienne est très différent aujourd’hui, comparé à il y a seulement vingt ans. Le changement le plus important a été l’expansion des vergers de noix de cajou et le déclin relatif de la superficie cotonnière. Cet article cherche à expliquer cette transformation agricole, en examinant la prise de décision des agriculteurs dans l’économie politique plus large de la Côte d’Ivoire et l’histoire du développement agricole de la région. Cette recherche combine des méthodes de recherche quantitatives et qualitatives à plusieurs échelles pour comprendre la dynamique de ce changement agraire. Les structures de marché contrastées et les prix à la production dans les secteurs du coton et de la noix de cajou expliquent en grande partie ce changement dans l’économie et les paysages agricoles.
Cinéma et audiovisuel en Côte d’Ivoire (2002-2018)
Authors: Boni Assié Jean-Baptiste
Published: September 2018

Si la majorité des films ivoiriens est destinée à la télévision, des réalisateurs visent à convertir leur production pour le grand écran. Ces productions, prisées du public, sont réalisées dans un contexte sociétal particulier. En 2008, en effet, ont été créés l’Office national du cinéma de Côte d’Ivoire et le Fonds de soutien à l’industrie cinématographique. Mais si la politique du ministère ivoirien de la Culture fait sens, elle n’en demeure pas moins tâtonnante et inaboutie. Résultat : un regard hâtif aurait tôt fait de conclure à l’immobilisme et même au recul de la production cinématographique en termes de quantité et de qualité. Pourtant, des films de bonne facture voient le jour, dans un univers dominé par le télévisuel. Cet essai dresse un état des lieux de la production cinématographique ivoirienne de 2000 à 2018.
L’histoire de vie, une recherche-action existentielle ?
Authors: Chaput-Le Bars Corinne
Published: September 2018

La méthodologie de l’histoire de vie a par essence des effets sur les acteurs qu’elle mobilise, et en particulier sur celles et ceux qui acceptent de confier leur récit aux chercheurs et que l’on appelle les narrataires. Une petite comparaison avec la recherche-action existentielle, telle que l’a théorisée René Barbier, depuis le niveau des objets à étudier jusqu’au degré de participation des acteurs, en passant par les effets de transformation sur eux et le monde, permet de l’inscrire pleinement dans la catégorie des recherches participatives. Depuis la préparation de cet article, René Barbier est décédé, le 18 septembre 2017, et nous voudrions ici lui rendre hommage.
Participatory action research in social work: towards critical reframing
Authors: Granosik Mariusz
Published: September 2018

Sujet : Qui est invité à participer ? D’ habitude, on adopte la thèse que dans les recherches participatives, on devrait inclure toutes les personnes intéressées, et l’ on souligne leur statut égal. En pratique, ils se divisent en chercheurs et les autres participants (Greenwood et al. , 1993 ; Chatterton, Fuller et Routledge, 2007). De plus, le choix des participants résulte de la problématisation relevant des discours courants, dominants (p.ex. intérêt grandissant des recherches sur les réfugiés). En effet, les recherches participatives se construisent, d’ un côté, sur des distinctions sociales bien établies opposant les académiciens et les « autres », et de l’ autre, sur un ordre changeant des discours sociaux et des politiques de justice, ce qui s’ inscrit dans la formule de « gouvernementalité » (Rose, 1999). D’ où des questions multiples au fondement de la recherche participative.
Taxe environnementale et incitations managériales dans un duopole mixte
Authors: Ouattara Kadohognon Sylvain
Published: September 2018

Cet article analyse la taxation des émissions de pollution sur un marché où une entreprise semi-publique est en concurrence avec une entreprise privée (nationale ou étrangère). Nous supposons que les propriétaires des firmes engagent un gestionnaire à qui ils délèguent les décisions de production et d’abattement de la pollution. Nous montrons que la politique environnementale est plus sévère dans le duopole mixte national que dans le duopole mixte international. De plus, parce qu’elle conduit à une augmentation de la quantité totale produite dans l’industrie, la délégation engendre une hausse de la taxe environnementale et dégrade la qualité de l’environnement. Par ailleurs, les gouvernements peuvent utiliser la politique environnementale comme un substitut à la privatisation.
Jewish identity, fan representation, and Yehuda Goldstein in the Potterverse
Authors: Krieger Deborah
Published: September 2018

The Harry Potter fan fiction "Goldstein," by Laazov, a long-running fic begun in November 2014 that remains uncompleted, centers on Anthony "Yehuda" Goldstein, a marginal character confirmed as Jewish by J. K. Rowling. This fan fic has led many Jewish fans to embrace him as the sole example of Jewish representation in the Potterverse. This analysis of "Goldstein" traces fan efforts regarding representation of marginalized identities and how these efforts have made it into the mainstream.
"The fanfiction reader: Folk tales for the digital age," by Francesca Coppa
Authors: Dubuisson Lorraine M.
Published: September 2018

Review of Francesca Coppa. The fanfiction reader: Folk tales for the digital age. Ann Arbor: University of Michigan Press, 2017. Hardcover, $75.00 (304p) ISBN 978-0-472-07348-1; paper $29.95 (304p) ISBN 978-0-472-05348-3; e-book $29.95.