bluuebunny/crossref_metadata_2025_split huggingface dataset:
Les interactions fiscales verticales à la lumière de la théorie des multiprincipaux
Authors: Lachet-Touya Florence 
Published: April 2012

Résumé Ce papier examine l’externalité verticale provenant de l’imposition d’une même base par des gouvernements aux territoires gigognes, phénomène récurrent observé dans la plupart des organiations étatiques et ayant fait l’objet d’un éclairage moins soutenu que celui de concurrence fiscale horizontale. Le modèle étudie un système comportant plusieurs niveaux de décideurs et utilise la théorie des multiprincipaux pour analyser l’optimalité du degré de taxe lorsque plusieurs autorités exercent leur pouvoir fiscal sur une même assiette imposable. Cette théorie permet en effet d’appréhender et de décrire les mécanismes de concurrence entre différents décideurs poursuivant des objectifs propres. Il ressort que le comportement non coopératif de collectivités appartenant à différents niveaux administratifs et partageant une même base fiscale conduit à une hausse du taux de taxation auquel cette base est soumise. Chacun néglige en effet la perte de recettes fiscales qu’il inflige aux autres niveaux de gouvernement etdéfinit donc une taxe supérieure à celle qui correspondrait au coût marginal social. Le taux final d’imposition excède celui qui résulterait de l’exercice par un seul décideur public de la politique fiscale à mettre en œuvre. Il apparaît en outre que la prise en compte d’une asymétrie d’information exerce un effet dépressif sur le niveau global d’imposition en conduisant chaque échelon à accorder une rente aux firmes, et donc à modérer sa pression fiscale, afin qu’elles révèlent leur information privéeet que puissent être mises en œuvre les politiques les plus proches d’un optimum social. Classification JEL : D72, D82, H23, H30, H32, H71, H77
Politique des dividendes et stabilité macroéconomique
Authors: Charles Sébastien 
Published: April 2012

Résumé Cet article évalue les effets d’une politique des dividendes endogène dans le cadre d’un modèle cambridgien de croissance et répartition. Dans cette optique, nous prenons en compte les interactions entre le taux de rétention et le niveau d’endettement et mettons en évidence les conditions de la stabilité macroéconomique. Ainsi, nous montrons que l’instabilité financière provient de comportements moins prudents de la part des gestionnaires, concernant le versement des dividendes. Enfin, quelques simulations numériques servent à illustrer les résultats précédents. Classification JEL : E12, E44, G35
Pratiques de régulation didactique en Éducation Physique et Sportive et place des savoirs techniques : illustration à travers une étude de cas
Authors: Boudard Jean-Marie , Robin Jean-François 
Published: April 2012

Résumé Cet article rend compte d’une recherche en didactique de l’Éducation Physique et Sportive (EPS). Il fait suite à un article (Boudard, 2011) présentant des résultats généraux à propos des pratiques de régulation didactique (RD) de cinq enseignants. Le but de chaque étude de cas est de décrire finement des pratiques de RD. Il s’agit notamment de décrire dans quelle mesure et comment sont mis en scène les savoirs à caractère technique. Dans cet article, nous présentons une étude de cas de façon plus approfondie : celle de « Franck », enseignant en lycée. La méthode croise des données issues d’observations et d’un entretien. Les résultats montrent que Franck s’engage de façon différenciée dans la RD, en fonction des contextes, tant en termes de fréquence que de contenu. Un résultat marquant est constitué par la faible représentation des savoirs techniques dans certains contextes. Ces résultats sont interprétés et discutés au regard de ces contextes et de la singularité professionnelle de Franck.
Stratégies de croissance de l'offre et différences statutaires : le cas des bases nautiques de la Côte d'Opale
Authors: Nicolas Lorgnier 
Published: April 2012

Résumé Si l’impact sociologique, économique et environnemental des loisirs sportifs de nature est l’objet d’un nombre de travaux grandissant, peu d’études s’attachent à expliquer les stratégies des entreprises qui constituent l’offre. Les rares contributions dans ce domaine analysent principalement les stratégies entrepreneuriales (Bouahouala, 2008 ; Bouhaouala & Chantelat, 2002 ; Paget, 2007 ; Paget, Mounet, & Guilhon, 2007) ou le management de la qualité (Chelladurai & Chang, 2000 ; Richet & Soulé, 2007 ; Shonk & Chelladurai, 2008 ; Thwaites, & Chadwick, 2005 ; Won et al. , 2008). Notre contribution étudie les stratégies des bases nautiques sous un angle plus traditionnel et jusqu’à présent inutilisé dans le sous-champ du tourisme sportif, celui du positionnement stratégique (Henderson, 1979 ; Porter, 1986). L’analyse qualitative de douze bases nautiques de la Côte d’Opale (Nord de France) nous permet alors de dégager cinq stratégies de croissance : 1) intégration verticale dans les métiers du nautisme ; 2) intégration horizontale dans un sport nautique ; 3) externalisation pour gérer les activités nautiques et touristiques ; 4) gestion d’un portefeuille d’activités ; 5) internationalisation et différenciation.
Bodies unbuilt in the dance-theater of Pina Bausch
Authors: de Souza Vieira Marcilio 
Published: April 2012

Résumé Les corps mûris dans la danse ont rendu possible la déconstruction de nombreux discours, une rupture de l’instrumentalisation et ont ouvert de nouveaux horizons pour la compréhension de la réalité plastique et complexe du corps. Ils ont été en outre l’objet d’innombrables réflexions épistémologiques, ontologiques, et esthétiques. Ils ont contribué à des débats au sein de l’Éducation physique et de l’Art en prenant en compte des questions complexes qui ont permis la mise en œuvre de recherches sur le sujet. L’une des plus importantes a été : comment agit un corps ? Ainsi, pour questionner la danse-théâtre de Pina Bausch mettant en scène des corps non conventionnels et ne correspondant pas aux standards habituels de beauté dans la danse, contribuant à la déconstruction des stéréotypes corporels et mettant en lien des dimensions inconciliables, l’un des objectifs du travail de recherche concernant la danse-théâtre a été d’étudier les éléments qui relient langage, danse, théâtre et corps esthétique. La méthodologie est fondée sur une analyse esthétique des corps au travers d’une liste d’images de la danse-théâtre de Pina Bausch.
Endoscopic management of gastroesophageal reflux disease in 2012: What works and what doesn′t
Authors: Triadafilopoulos George 
Published: April 2012

AbstractGastroesophageal reflux disease results primarily from the loss of an effective antireflux barrier, which forms a mechanical barrier against the retrograde movement of gastric contents. Multiple devices have been developed for the endoscopic treatment of GERD, using approaches such as sewing, transmural fasteners, endoscopic staplers, and thermal treatment. Devices that are currently commercially available for the endoscopic treatment of GERD in the US include: EndoCinch; EsophyX; Stretta. This article will highlight the endoscopic therapy of gastroesophageal reflux disease with focus on Stretta and EsophyX.
Chronic pancreatitis: The case for surgery
Authors: Ramesh H. 
Published: April 2012

AbstractTreatment of pain in chronic pancreatitis includes medical, endoscopic and surgical therapy. Medical treatment may involve the use of analgesics, pancreatic enzymes, antioxidants and removal of risk factors. However, a substantial number of patients do not experience pain relief with medical treatment, and those with local complications cannot be treated medically indefinitely. These require endoscopic or surgical therapy. Endoscopic therapy has involved the use of a) pancreatic sphincterotomy, b) stent placement, c) nasopancreatic drainage, d) pseudocyst drainage, e) extra corporeal shock wave lithotripsy (ESWL), and f) dilatation of strictures. The current options for surgical therapy include: a) partial pancreatic resections, b) extended pancreatic drainage procedures (which involve additional subtotal resection of the head or a deep coring out of the head, or c) pure pancreatic drainage procedures. In effect surgical procedures provide a more thorough drainage of the ductal system than pancreatic stent placement. This is especially true in the complex ductal arrangement of the head of the pancreas, where simple drainage of the duct or stent placement by endoscopy is unlikely to provide thorough drainage and relief of symptoms.
Endoscopic ampullectomy
Authors: Bourke Michael 
Published: April 2012

AbstractEndoscopic ampullectomy offers a minimally invasive method of effectively treating non-invasive neoplasms of the ampulla of Vater and surrounding peri-ampullary region with high success and relative safety. These lesions would otherwise require surgical intervention, including pancreatico-duodenectomy. However, major complications may occur and a careful assessment of the patients comorbidities and their ability to tolerate adverse events needs to be factored into the treatment decision. Careful staging, often multi-modality is required, particularly for extensive lesions. Complete en-bloc excision of the entire neoplasm should be the goal with conventional papillary adenomas. Large lesions with extra-papillary extension currently require extended piecemeal excision, however with meticulous technique, recurrence is uncommon in longterm follow up.
Robotics in gastrointestinal endoscopy
Authors: Ho Khek-Yu 
Published: April 2012

AbstractThe application of robotics in gastrointestinal endoscopy is a much anticipated technological advancement that is attracting an enormous amount of interest from innovators and end-users alike. Emerging robotics-enhanced endoscopy platforms for performance of various endoscopic interventional procedures are already in development and some are expected to be in the pipeline for commercialization in another few years’ time. In particular, the Master And Slave Transluminal Endoscopic Robot (MASTER) developed by a collaboration between the National University of Singapore and the Nanyang Technological University, Singapore is already in human trials for an endoluminal procedure, endoscopic submucosal dissection (ESD). The results on trials performed on five patients with early gastric neoplasia have demonstrated the feasibility and safety of using the system for such procedure, while also shortening the procedure time. This article will highlight the advantages of robotics innovations in gastrointestinal endoscopy, with the MASTER as an example, and explore some of the many possibilities for future applications of robotics-enhanced endoscopy.
Nanotechnology in gastrointestinal endoscopy: A primer
Authors: Jha Ashish Kumar , Goenka Mahesh Kumar , Nijhawan Sandeep , Rai Ramesh Roop , Goenka Usha , Suchismita Arya 
Published: April 2012

AbstractNanotechnology is the understanding, control of matter and development of engineered devices in nanometer range (1-100 nm). Nanoparticles have different physicochemical properties (small size, large surface area to volume ratio, and high reactivity) in comparison to bulk materials of the same composition. The nanotechnology has proved its usefulness in early diagnosis, proteonomics, imaging diagnostics and multifunctional therapeutics. Recent studies have shown its role in early diagnosis and targeted therapy of various gastrointestinal disorders such as hepatitis B virus and hepatitis C virus related liver disease, inflammatory bowel disease, gastric ulcer, and malignancy. Application of this technology appears promising in diagnostic and therapeutic endoscopy such as the endoscopic hemostasis of peptic ulcer bleeding, prevention of clogging of plastic stent and advance capsule endoscopy. This article will highlight the basic concepts of nanotechnology and its potential application in gastrointestinal endoscopy.
RESERVOIR ARCHITECTURE OF TURBIDITE SHEET SANDSTONES IN LATERALLY EXTENSIVE OUTCROPS, ROSS FORMATION, WESTERN IRELAND
Authors: Chapin M.A. , Davies P. , Gibson J.L. , Pettingill H.S. 
Published: April 2012

ABSTRACT
Outcrops of the Carboniferous Ross Formation, western Ireland, provide laterally extensive exposures of turbidite sheet sandstones. The Ross Formation is 65% sandstone and 35% silty mudstone; it overlies deepwater shale and underlies slumped, silty slope shales and cycles of shallow-water, deltaic sandstones and mudstones. Sediments were sourced from the southwest.
The Ross Formation comprises mostly sheet sandstones composed of mainly very fine-grained, classical turbidites with Bouma Sequences, averaging 1 foot (30 cm) in thickness. Bed-by-bed lateral correlations from long photo-mosaics and measured sections show that individual sheet sandstone beds in sand-rich zones are broadly lenticular, but amalgamate through erosion to form continuous sandy bedsets 3-20 feet (1-6 m) in thickness and thousands of feet (meters) in lateral extent. Sheet sandstone beds in muddier intervals are not amalgamated, but have longer bed lengths, and are less lenticular. Small, sand-filled channels less than 2000 feet wide (600 m) and less than 40 feet deep (12 m) are interspersed with the sheets, and sometimes contain sandstone beds that can be traced laterally out of the channels into overbank areas dominated by sheets.
Abundant lenticular bedding, trough cross-stratification and flute-shaped scours are present in sheet sandstones near to small, poorly-confined channels, implying channel-mouth deposition. Vertical sections are dominated by random bed thickness patterns and by similarity of facies associations throughout the thickness of the formation. The environment of deposition is interpreted as an aggradational, sand-rich fan within a rapidly subsiding basin, with small, coalescing mid-outer fan lobes with multiple shallow channels.
For reservoir classification, two types of sheet sandstones are differentiated: layered sheets and amalgamated sheets. Layered sheets usually display long bed lengths resulting in great lateral and poor vertical reservoir continuity. Amalgamated sheets display shorter bed lengths but long amalgamated bedset lengths, resulting in good lateral and poor to fair vertical reservoir connectivity. A high degree of log correlation between wells is more diagnostic of sheet architecture than is vertical log profile.
TURBIDITE SYSTEMS AND THEIR TEMPORAL AND SPATIAL DISTRIBUTION, DEEP GULF OF MEXICO BASIN
Authors: FENG JIANHUA , BUFFLER RICHARD T. 
Published: April 2012

ABSTRACT
A detailed seismic stratigraphic analysis of the deep Gulf of Mexico basin allows the subdivision of post mid-Cretaceous deep water clastic sediments into eighteen seismic sequences. Each sequence consists mainly of lowstand systems tracts bounded by regional correlative conformities, which are characterized by regionally extensive, continuous, high-amplitude reflections. A chronostratigraphic framework for the eighteen seismic sequences has been established by using seismic and well data.
Seismic facies analysis allows the identification of fifteen seismic facies and reveals diverse turbidite systems, suggesting equally diverse depositional processes operating in the deep Gulf of Mexico basin. Each sequence consists of several submarine fans, which were deposited along the margins of the deep basin and characterized by various turbidite systems, including sand-rich turbidite/lobe complexes, sand-rich mounded turbidite/lobe complexes, unchannelized turbidite systems, partially channelized turbidite systems, and channel/levee/overbank turbidite systems. Basinal low energy mud-rich turbidites and hemipelagic/pelagic sediments dominate the rest of the deep basin. The vertical occurrence of seismic facies reflects the progradational infill of the deep basin by submarine fans through time, as indicated by the successive appearance of unchannelized, partially channelized, and channel/levee/overbank turbidites systems.
The spatial distribution of submarine fan systems is closely related to the shifting in position of time equivalent shelf margin depocenters, suggesting the existence of sediment fairways across the continental slope.
SEQUENCE ARCHITECTURE OF EXPOSED LATE MIOCENE BASIN FLOOR FAN AND CHANNEL-LEVEE COMPLEXES (MOUNT MESSENGER FORMATION), TARANAKI BASIN, NEW ZEALAND
Authors: KING PETER R. , BROWNE GREG H. , SLATT ROGER M. 
Published: April 2012

A unique section through late Miocene basin floor fan, channel-levee complex, and prograding complex units of several lowstand systems tracts, occurs in the coastal region of north Taranaki, New Zealand. Strata dip gently and are superbly exposed in coastal cliffs as much as 200 m high. The overall succession exposed along the coast is progradational. The major controls on sedimentation were relative changes in sea-level (base-level changes), influenced by high rates of sediment supply. Broad intervals dominated by one or other lowstand systems tract component are identified in outcrop, and can be correlated into the subsurface using seismic reflection profiles and SP logs.
Exposed basin floor fan and channel-levee successions within the Mount Messenger Formation form the basis of the present study. Five distinct sequences are recognized. Relatively thick, fine-grained intervals constitute the upper portions of individual sequences. Paleobathymetric deepening trends and high gamma-ray counts have been recorded in some of these intervals. Sequence boundaries occur as erosional contacts.
The basin floor fan (lowstand fan) units comprise meterthick massive and convolute-bedded sandstone with minor mudstone, and thin-bedded massive sandstone, horizontal and ripple-laminated sandstone, and mudstone. More proximal early lowstand (basin floor fan equivalent) lithofacies include conglomerate and thick-bedded sandstone, within nested channels that erode as much as 30 m into underlying strata. Channels almost invariably occur above slumped intervals, and we suggest that retrogressive slumping created sea-floor topographic depressions within which the channels preferentially formed.
Channel-levee complexes are characterized by interleaving packages of thin-bedded siltstone and sandstone. Levee overbank siltstone is prevalent in lower, more distal parts of channel-levee complexes. In upper, more proximal parts, coalescing channelized units are common, and within these, welldeveloped Bouma sequences and climbing ripple-laminated sandstones are particularly distinctive.
Thick-bedded sandstones (basin floor fan) have lowest outcrop gamma ray values, of about 125 counts per second (cps). Sandstone gamma ray values generally range up to 180–190 cps, both in the basin floor fan and channel-levee lithofacies. Mudstone gamma ray counts are generally higher (up to 250 cps), though there is considerable overlap with sandstone values, particularly in thin-bedded lithofacies.
Sandstone permeabilities measured in outcrop are mainly in the range 100mD–800mD. Thick-bedded sandstones have the highest permeabilities, demonstrating a primary facies control on reservoir quality.
ARCHITECTURE OF A SAND-RICH FAN FROM THE TABERNAS SUBMARINE FAN COMPLEX, SOUTHEAST SPAIN
Authors: KLEVERLAAN KICK 
Published: April 2012

The Tabemas submarine fan complex is part of a late Miocene basin fill succession in SE Spain and includes three distinct turbidite systems. These systems are referred to as sand-rich system, mixed sand/mud system, and isolated channel system.
Isolated in mudstone, the overall geometry of the sand-rich system is rather well defined. The dominant stacking pattern is aggradational rather than progradational or retrogradational, and sediment accumulation occurred in a relatively small area. This points to a very localised and recurrent increase of accommodation space. The setting of the fan within a strike/slip dominated basin, and the point source tapping from a lithic arenitic provenance area may greatly favour a compact, aggradational architecture.
Mapping on a bed by bed basis suggests a considerable relief of the seabed, as can be concluded from the following observations. The bulk of the deposits are originating from high density turbidity currents and have intrinsic geometries with high thickness/width ratios: relatively narrow, well-defined accumulations.Abundant scour features at various scales, generally with high thickness/width ratios (narrow and deep).Syn-sedimentary deformations, such as slides, slumps and pressure ridges (“push-ups”), clastic intrusions, and progressive loading of the entire fan body in the underlying mud.
Interaction of above mentioned features and high density turbidites may constitute an additional factor favouring compact fan growth.
INTERNAL STACKING PATTERNS OF ANCIENT TURBIDITE SYSTEMS FROM COLLISIONAL BASINS
Authors: Mutti Emiliano , Davoli Giancarlo , Mora Stefano , Papani Lorenzo 
Published: April 2012

Abstract
The preliminary conclusions derived from the detailed study of some 25 ancient turbidite systems of collisional basins indicate that, at different hierarchical orders, basinward and landward shifts of sandy depositional zones and their related sediment transfer zones control the observed stacking patterns. Within each system, these zonal shifts produce a hierarchy of units which, from the smallest to the largest, include elementary facies tracts (EFTs), facies, facies associations and stages. EFTs, composed of a limited number of beds (generally less than 10), slack to form facies; facies stack to form facies associations; facies associations stack to form stages; and stages stack to form systems. In the latest stages of growth of some systems, the zones of sand deposition shift landward in adjacent delta or fan-delta complexes; in these cases, slope and basinal turbidite sedimentation may become essentially restricted to fine-grained sediments (channel-levee complexes or overbank wedges) which are more or less directly sourced by fluvial systems.
High-frequency, cyclic forestepping-backstepping episodes of basinal sand deposition are recorded within each system and its component stages by successions of beds (EFTs) and facies (facies associations) which commonly are expressed by m- to dam-thick units showing overall thinning-and fining-upward trends. These trends are thought to be related primarily to the frequency of gravity flows and to cyclic variations in their individual volume. The origin of these high-frequency cyclic variations is still poorly understood.
High-frequency cyclic stacking patterns can be recognized only on a case-by-case basis, through careful facies analysis and very detailed stratal correlation patterns. Locally, the stacking patterns of individual sandstone beds within EFTs or within sandstone facies composed of EFTs can be considerably modified by local depositional or structural relief, as well as by differential compaction.
Retrogressive slumps produced by failure of poorly consolidated sediment stored in oversupplied or tectonically unstable basin margins are likely to be one of the main causes for the high-frequency cyclicity observed in the early stages of development of many turbidite systems formed during periods of relative sea-level lowstand. The same type of cyclicity may be controlled by changes in shelfal accommodation and climate when slump scars are progressively reached by the deep-water extensions of prograding delta complexes during subsequent periods of relative sea-level rise.
Growing evidence suggests that in high-relief physiographic settings, high-frequency climatic changes can trigger catastrophic, subaerially derived gravity flows (Missoula type) which may directly enter adjacent deep-water basins, thus forming cyclically stacked turbidite systems. These systems and their bearing upon current sequence-stratigraphic models of deep-water siliciclastic sedimentation remain unexplored.