bluuebunny/crossref_metadata_2025_split huggingface dataset:
Olhar o passado onde ele (não) está: Araujo Porto-Alegre e a história do Brasil a partir de Portugal
Authors: Mollo Helena 
Published: March 2015

O presente artigo visa contribuir com as discussões sobre a historiografia da segunda metade do oitocentos no Brasil, e como as descobertas de campos do conhecimento, como a geologia e arqueologia, dinamizam a escrita da história. A chamada primeira geração romântica teve como desafio a organização de um novo espaço, e, diante da reorganização de vários campos de saber que tocavam o passado, viu-se a trabalhar com a história ombreando outros campos. No manuscrito intitulado História do Brasil, Manoel de Araújo Porto-Alegre anuncia uma ‘tradição partida’ que significava escrever sobre momentos mais distantes do que à primeira vista pareciam ser. Neste texto, objetiva-se compreender como a noção de passado longínquo utilizada por Porto-Alegre passa a ser uma noção válida para a constituição dos fatos históricos.
A historia magistra vitae e o pós-modernismo
Authors: Bastos Marques Juliana 
Published: March 2015

Pretendo neste artigo fazer uma proposta de crítica às abordagens mais recentes da Teoria da História, mormente de Reinhard Koselleck e Jörn Rüsen, mas também dos pós-modernos, que identificam uma ruptura radical entre modelos de historiografia da Antiguidade clássica e da modernidade. Partindo das reflexões preliminares de Arnaldo Momigliano sobre a questão, proponho identificar tanto as abordagens dos autores citados quanto as dos pós-modernistas como parte de um Zeitgeist que desconsiderou algumas premissas antigas da relação entre história, utilidade, verdade e exemplo, oferecendo uma ressignificação de tais relações nos tempos atuais.
História da historiografia como analítica da historicidade
Authors: De Araujo Valdei Lopes 
Published: March 2015

Neste artigo analiso os contornos teóricos da história da historiografia, desde suas possibilidades como uma subdisciplina acadêmica, sua evolução recente no contexto brasileiro até as vantagens e riscos de sua institucionalização. Tento ainda pensar o campo de fenômenos, a abertura do tempo histórico, que poderia fundamentar uma história da historiografia como analítica da historicidade. Argumento, a partir da definição de historicidade em Heidegger, que tal analítica poderia permitir uma ampliação substancial do escopo de uma história da historiografia como atividade de fronteira, capaz de contribuir para a recuperação de certa experiência da história.
Diálogos históricos e historiográficos: séculos XIX e XX
Authors: Naxara Marcia 
Published: March 2015

Procuro justapor as perspectivas de dois autores que, com pouco mais de um século de distância, apresentaram distintas preocupações quanto ao conhecimento do Brasil e a escrita de sua história: Henrique de Beaurepaire-Rohan (1812-1894) e Manoel Luiz Salgado Guimarães (1952-2010). Para o primeiro, conhecer o país, seu território e sua formação era necessário à construção da nacionalidade, considerando a relação entre o passado, o estudo do presente e as perspectivas de futuro então abertas à jovem nação. Para o segundo, fundamental era o estudo dos procedimentos historiográficos e o acompanhamento das discussões que envolveram a escrita da história de um “ponto de vista nacional” no Brasil do século XIX. Trata-se, portanto, de um exercício de aproximação (e afastamento) entre os objetivos do historiador de hoje, dedicado ao estudo de textos fundacionais em circulação no Instituto Histórico e Geográfico Brasileiro (IHGB); e os propósitos do historiador oitocentista, revelando, de certo modo, os caminhos do conhecimento histórico entre nós.
Uma parábola acadêmica: a jangada de Robert W. Fogel
Authors: Moura Filho Heitor Pinto de 
Published: March 2015

O livro Time on the Cross: The Economics of American Negro Slavery, de Robert W. Fogel e Stanley L. Engerman, alcançou grande fama como revolucionária interpretação da escravidão norte-americana, embora, à época, tenha sido detalhadamente criticado por especialistas em história econômica quantitativa. Cremos que citá-lo por seu pioneirismo nos estudos quantitativos da escravidão tenha-se tornado um “meme” acadêmico que não espelha adequadamente as contundentes críticas sofridas pelo livro nos anos seguintes ao seu lançamento. Este texto relembra o lançamento do livro e os debates subsequentes, no contexto ideológico e metodológico da época, discutindo as críticas, com o objetivo de relativizar a contribuição desses autores emcomparação com a dos demais estudiosos da escravidão.
História cultural e história do corpo na História Antiga alemã
Authors: Meister Jan B. 
Published: March 2015

O objetivo deste artigo é explicar as idiossincrasias da História Cultural como praticada na Alemanha – ou melhor, nos países de língua alemã – e chamar a atenção para alguns desenvolvimentos recentes no contexto dessa nova História Cultural entre historiadores alemães da Antiguidade no campo específico da história do corpo. São discutidas várias tendências da História Cultural. Primeiro, que os historiadores foram influenciados pela história da vida cotidiana, que foca em pequenas unidades e em diferentes aspectos da vida comum e não em grandes superestruturas da sociedade. Outra tendência é o crescente interesse de historiadores alemães em métodos e teorias derivados da antropologia cultural. Uma terceira tendência é o crescente interesse na
história feminista e especialmente na construção de papéis de gênero. Um caso especial nesse amplo campo da História Cultural é a história do corpo. De certo modo, essa área de especialização da história exemplifica todos os problemas e possibilidades da História Cultural.
Chemically-Induced Pressure Pulse: A New Fracturing Technology for Unconventional Reservoirs
Authors: Al-Nakhli Ayman R. 
Published: March 2015

AbstractThe huge resources of unconventional gas worldwide along with the increasing oil demand make the contribution of unconventional gas to be critical to the world economy. However, one of the major challenges that operators face to produce from unconventional resources is commercial stimulation technique that creates sufficient stimulated reservoir volume. Unconventional reserves trapped within very low permeability formations, such as tight gas, or shale formations, exhibit little or no production, and are thus economically undesirable to develop with existing conventional recovery methods. Such reservoirs require a large fracture network with high fracture conductivity to maximize well performance.One commonly employed technique for stimulating low productivity wells is multi-stage hydraulic fracturing, which is costly and typically involves the injection of high viscosity fluids into the well. Fracturing fluid by itself could form a damaging material for the fracture due to high capillary forces. Thus, additional needs exist for an economical method to enhance production within a tight gas formation.This paper discusses a new stimulation method to increase stimulated reservoir volume (SRV) around wellbore and fracture area, and therefore, improve unconventional gas production. The method entails triggering an exothermic chemical reaction in-situ to generate heat, gas and localized pressure sufficient to create fractures around the wellbore. In controlled experiment, chemical reactants were separately injected into core samples with a minihole and upon mixing inside the core, an exothermic chemical reaction occurred and the resultant heat and gas pressure caused macro-fractures. NMR-porosity imaging showed significant increase in macro pores throughout the core. Additionally Large scale experiments using cement blocks with a simulated wellbore cavity were performed. Once the wellbore was filled with the chemicals and upon introducing a triggering catalyst an in-situ chemical reaction took place which generated heat and gas with sufficient pressure to cause shear fractures in the surrounding rock. These experiments showed extensive fractured and shattered pieces and also provided preliminary design requirements for a field test. The chemical reactants then incorporated into a fracturing gel to simulate creating additional fractured from the main induced hydraulic fracture. The results were very encouraging and the generated high temperature and pressure caused the gel to break thus it is concluded that this technique effectively contribute to fracture cleanup in addition to creating required SRV. The experiments were very successful in proving the new concept of generating SRV in tight gas well and the developed stimulation technique is fairly easy to implement in the field.
Optimization of Well Trajectories and Wellhead Towers' Slots Allocation Through a Collaborative Well-Planning Approach
Authors: Marir Boualem , Mandel Christian , Al Jefri Ghassan , Torres Javier , Ferdian Salman 
Published: March 2015

Abstract
Traditionally, geoscientists, drilling, reservoir, and facility engineers work separately on projects. The workflows between these disciplines are typically onerous, iterative, and time consuming because there is no common environment between roles. For offshore fields, the limited number of towers from which wells can be drilled make well planning a critical process for a successful development. Usually, planning is done on a well-by-well basis, which could introduce the potential for increased risks.
ADMA-OPCO has begun developing an offshore green field through drilling about 90 wells (duals and singles) from eight wellhead towers. The development scheme for this field is optimized per reservoir, five-spot water injection, natural depletion, and gas injection. For each tower, slots (injector vs. producers) and allocations have to be defined with high confidence and be communicated to surface project teams to start the design and engineering process. This exercise requires working all well trajectories (drillable wells that meet the statements of requirements). Early in the field-development process, the common practice is to do the well-profile work on a well-by-well basis, which takes a minimum of three to five days per well depending on well type and complexity.
This paper addresses a different approach that is used by ADMA-OPCO, which allowed for accelerating the planning process by integrating all stakeholders for the objective of reducing the working hours while optimizing the trajectories and taking into account all criteria and safety guidelines executed within a 3-D static-model environment.
As an outcome, more than 100 horizontal drains were successfully optimized, and slot allocations were defined for all towers within 20 working days (minimum of 380 days would be required if done on a well-by-well basis). A drilling footage of more than 20, 000 ft was saved after optimization. Additionally, the real collaborative value was seen in the integrated working sessions, resulting in an improved deliverable.
Global Optimization Strategies For Well Tests In Dual Porosity Reservoirs
Authors: Al-Nemer A.A. , Issaka M.B. , Awotunde A.A. , Al-Hashem H.S. 
Published: March 2015

Abstract
This study presents an investigation of the performance of multiple stochastic optimization algorithms in performing automatic type-curve matching for pressure transient well test analysis. The pressure transient responses of a vertical well in a dual porosity reservoir were generated. A synthetic reservoir model that shows all flow regimes for the model was created. Gaussian White Noise data was added to the typical response to imitate measured data. In addition to the Levenberg-Marquardt algorithm, four stochastic algorithms were used to estimate the reservoir model from the noisy data. These algorithms are Deferential Evolution, Particle Swarm Optimization, Local Unimodal Sampling and Many Optimizing Liaisons. Behavioral parameters of each algorithm were investigated by comparing the performance of recommended values in the literature. Each algorithm was run for 25 realizations. The results of the runs were ordered in terms of the best achieved result. The performance was compared by comparing the best 1st, 7th, 19th and 25th results of each algorithm.
The result showed that the algorithms performance is affected by the model and the unknowns. Differential Evolution algorithm showed the best performance in Dual Porosity Reservoir when Øm, λ, ω, skin, re & kf are the unknowns. All the other stochastic algorithms performed better than Levenberg-Marquardt optimization algorithm.
Impact of Perforation Tunnel Orientation and Length in Horizontal Wellbores on Fracture Initiation Pressure in Maximum Tensile Stress Criterion Model for Tight Gas Fields in the Sultanate of Oman
Authors: Briner Andreas , Chavez Juan Carlos , Nadezhdin Sergey , Alekseenko Olga , Gurmen Nihat , Cherny Sergey , Kuranakov Dmitry , Lapin Vasily 
Published: March 2015

Abstract
The goal of the present work is to simulate the effects of perforation misalignment on fracture initiation pressure (FIP). A 3D numerical model of the fracture initiation from a perforated wellbore in linear elastic rock is used to model FIP. This model is based on the boundary element method (BEM) and maximum tensile stress (MTS) criterion. Simulations enable studying FIP sensitivity to perforation orientation and finding the orientation that corresponds to the lowest FIP as well as the FIP change along the length and the circumference of the perforation tunnel. The data used were from different zones and blocks of a tight gas-bearing sandstone field in the Sultanate of Oman. Some practical applications of the study include the decisions on the type of perforation technique (i.e. abrasive jetting or explosive perforations), which greatly impact the economics of the fracturing treatments.
The Impact of Gas Adsorption and Composition on Unconventional Shale Permeability Measurement
Authors: Jin Guodong , Pérez Héctor González , Agrawal Gaurav , Khodja Mohamed R. , Ali Abdulwahab Zaki , Hussaini Syed Rizwanullah , Jangda Zaid Zaffar 
Published: March 2015

Abstract
Permeability determination of organic-rich shales is still a major challenge. Uncertainty in this estimate involves several factors. Two significant ones are the occurrence of gas adsorption which can severely limit gas transport in the pores and understanding the physical chemistry issues of the pore's surface area estimation when using various gases. In this study, we reported our experimental results of permeability measurement on several unconventional shale samples, and investigated the effect of gas type, pore pressure, effective stress and sample orientation on the measured permeabilities.
Permeability of shale samples is measured using the complex pressure transient technique. Three different gases, argon, nitrogen, and carbon dioxide, are used as permeating fluid through the samples. Experiments are conducted isothermally at various pore and confining pressures that maintain a constant net effective stress. Generally, samples have higher measured permeabilities when using nitrogen as pore fluid rather than using argon. The discrepancy was attributed to different adsorption potentials between argon and nitrogen: Argon has a similar sorption potential to methane while nitrogen's sorption potential is relatively weak. As expected, the measured permeability of all samples decreases when the pore pressure increases reflecting the reduction in the gas slippage effect. Samples from the same whole core display permeability anisotropy: Horizontal plugs cut parallel to bedding have a higher measured permeability, which is in the range of microdarcy, while the permeability of vertical plugs cut perpendicular to bedding is in the range of nanodarcy. This anisotropy behavior is believed to be caused by the fractures contained within the horizontal samples. The measured permeability is observed to decease with increasing effective stress acting on the samples. This reduction behaves differently: Permeability decreases very slowly when the increasing effective stress is resulted from the decrease of the pore pressure. The enhanced Klinkenberg effect due to the decreasing pore pressure compensates at least partly the permeability reduction resulting from increasing effective stress. However, permeability reduces dramatically when the effective stress increases because of the increasing confining pressure. In this case, the flow channels may be reduced or even closed, thus blocking the flow of gas.
Glacier dynamics near the calving front of Bowdoin Glacier, northwestern Greenland
Authors: Sugiyama Shin , Sakakibara Daiki , Tsutaki Shun , Maruyama Mihiro , Sawagaki Takanobu 
Published: March 2015

AbstractTo better understand recent rapid recession of marine-terminating glaciers in Greenland, we performed satellite and field observations near the calving front of Bowdoin Glacier, a 3 km wide outlet glacier in northwestern Greenland. Satellite data revealed a clear transition to a rapidly retreating phase in 2008 from a relatively stable glacier condition that lasted for >20 years. Ice radar measurements showed that the glacier front is grounded, but very close to the floating condition. These results, in combination with the results of ocean depth soundings, suggest bed geometry in front of the glacier is the primary control on the rate and pattern of recent rapid retreat. Presumably, glacier thinning due to atmospheric and/or ocean warming triggered the initial retreat. In situ measurements showed complex short-term ice speed variations, which were correlated with air temperature, precipitation and ocean tides. Ice speed quickly responded to temperature rise and a heavy rain event, indicating rapid drainage of surface water to the bed. Semi-diurnal speed peaks coincided with low tides, suggesting the major role of the hydrostatic pressure acting on the calving face in the force balance. These observations demonstrate that the dynamics of Bowdoin Glacier are sensitive to small perturbations occurring near the calving front.
Job Profiles of Biomedical Informatics Graduates
Authors: Ammenwerth E. , Hackl W. O. 
Published: March 2015

SummaryBackground: Biomedical informatics programs exist in many countries. Some analyses of the skills needed and of recommendations for curricular content for such programs have been published. However, not much is known of the job profiles and job careers of their graduates.Objectives: To analyse the job profiles and job careers of 175 graduates of the biomedical informatics bachelor and master program of the Tyrolean university UMIT.Methods: Survey of all biomedical informatics students who graduated from UMIT between 2001 and 2013.Results: Information is available for 170 graduates. Eight percent of graduates are male. Of all bachelor graduates, 86% started a master program. Of all master graduates, 36% started a PhD. The job profiles are quite diverse: at the time of the survey, 35% of all master graduates worked in the health IT industry, 24% at research institutions, 9% in hospitals, 9% as medical doctors, 17% as informaticians outside the health care sector, and 6% in other areas. Overall, 68% of the graduates are working as biomedical informaticians. The results of the survey indicate a good job situation for the graduates.Conclusions: The job opportunities for biomedical informaticians who graduated with a bachelor or master degree from UMIT seem to be quite good. The majority of graduates are working as biomedical informaticians. A larger number of comparable surveys of graduates from other biomedical informatics programs would help to enhance our knowledge about careers in biomedical informatics.
Le réseau ombrel : maillage entre un service associatif et un réseau périnatal
Authors: Mairesse Sylvie , Cardinael Sylvie , Dusol Élizabeth 
Published: March 2015

L’annonce du handicap provoque bouleversements et angoisses chez le parent. Les équipes médicales (réseau OMBREL) et les associations souhaitent améliorer cette approche et l’annonce en maternité. Partage et mutualisation sont des mots-clés qui montrent une volonté de tous pour faire avancer la cause. Il y a d’une part l’APEI Papillons blancs de Lille, association de parents et amis qui met en œuvre des solutions innovantes d’accompagnement pour tous les âges. D’autre part, un réseau périnatal (OMBREL) qui organise la prise en charge interétablissements. Depuis 2005, il intègre les praticiens de ville (sages-femmes, médecins, gynécologues, pédopsychiatres, psychologues, etc.) CAMSP, PMI et les associations des usagers comme l’APEI de Lille. Au fil des ans, un partenariat avec l’APEI s’est institué auprès des maternités du réseau pour une meilleure annonce du handicap mental, du suivi des parents et de l’enfant. Ce travail de collaboration en réseau augmente les chances d’insertion de l’enfant et de retour à une vie normale pour la famille. Cette réussite ouvre un avenir prometteur aux partenaires et devrait permettre d’aller plus loin dans les projets de soutien et d’acceptation de l’enfant « différent » en pré et postnatal.
Performation et surveillance du système financier
Authors: Walter Christian 
Published: March 2015

La surveillance du système financier doit inclure la prise en compte de l’impact des outils de gestion et en particulier ceux qui contiennent une représentation du risque. Véritable machinerie de la finance professionnelle, les outils de gestion transportant une représentation du risque ont un impact à la fois organisationnel (les procédures de contrôle), institutionnel (les normes de régulation internationale), technique (les méthodes d’évaluation) et cognitif (les manières de penser l’incertitude pour s’en prémunir). Le façonnage des activités financières par les outillages techniques et mentaux est appelé « performation » du système financier. Il est de première importance de mieux comprendre le rôle joué par la performation dans la crise financière de 2007-2008 pour se prémunir contre des crises futures. Classification JEL : B4, C4, G11, G20.
La nouvelle régulation bancaire microprudentielle : principes, incidences et limites
Authors: Pollin Jean-Paul 
Published: March 2015

Cet article se propose de présenter rapidement et d’évaluer les nouvelles dispositions du système de régulation micro-prudentielle, résultant des accords de Bâle III. On décrit d’abord les fondements et les grandes lignes de ces accords destinés à tirer les leçons de la crise financière. On cherche ensuite à en apprécier les coûts et avantages, d’un point de vue théorique puis empirique. Enfin on évoque trois questions qui devraient faire l’objet de traitements complémentaires pour permettre à la réforme d’atteindre sa pleine efficacité. Classification JEL : E42, F34, G01.
La dissolution du cœur de la D eutschland AG
Authors: Lantenois Christopher 
Published: March 2015

L’objet de cet article est d’examiner dans quelle mesure le « cœur » de la Deutschland AG – défini comme l’ensemble des participations croisées capitalistiques et humaines entre les principales institutions financières – s’est brutalement érodé cette dernière décennie. Puis nous analysons les conséquences sur le rôle des banques dans la gouvernance des sociétés industrielles cotées. Nous constatons que les institutions financières ont délaissé le rôle de Hausbank , cédant massivement leurs participations et désertant les conseils d’administration et les AG. L’article se décompose en trois parties. Après avoir relaté la mutation stratégique de la Deutsche Bank, nous quantifions empiriquement l’ampleur de la déstabilisation du « cœur » de la Deutschland AG . Nous réfléchissons enfin aux conséquences sur l’implication des banques dans la gouvernance de l’industrie. Classification JEL : G32, G34, G38, L14.