bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study and analysis of mechanical and viscoelastic behavior in flexure of laminated composites
Authors: Halimi Rafik , Bezzazi Boudjema , Bouda Ali Badidi , Abbou M'hamed Djelloul , Mimouni Oussama 
Published: October 2015

Abstract
In the present paper, seven laminated composites were the subject of an experimental study to determine their mechanical and viscoelastic properties by means of dynamic mechanical analysis in a bending configuration. The influence of the frequency, fiber type and fiber orientation on dynamic mechanical properties of different system composites were investigated. Carbon/epoxy laminates exhibit a great stiffness when fibers are oriented along the axis of the clamps, and the maximum modulus was reported for unidirectional carbon/epoxy laminate [08 plies] with 56.4 GPa. The glass transition temperature was found to decrease with the incorporation of fibers and increase with increased frequency. For the Kevlar/epoxy laminate, an increase of 12.5°C in glass transition temperature was observed. This is related to a better interfacial adhesion between epoxy matrix and Kevlar fibers.
Strong cellular lattices with nitro-carburized stainless steel hollow trusses
Authors: Dong Liang , Heuer Arthur , Kahn Harold , Li Zhen , Deshpande Vikram , Wadley Haydn 
Published: October 2015

Abstract
Collinear lattice structures have been fabricated from 304 stainless steel hollow tubes via an alternating collinear lay-up process followed by bonding using a vacuum brazing method. By varying the tube wall thickness from 50 to 203 μm, square and diamond lattice topologies with relative densities between 0.03 and 0.11 were manufactured in this way and their compressive mechanical responses were characterized. A low temperature nitro-carburization treatment was then performed on a second set of the collinear lattice cores at a temperature of 440°C for 20 h. The treatment created a thin (10 to 20 μm thick) extremely hard (∼12 GPa) surface layer on the interior and external surfaces of the hollow trusses. This significantly increased the compressive buckling resistance of individual trusses. Compressive strength enhancements (compared with untreated counterparts in the annealed (as brazed) condition) varied from 1.2 for thick walled tubes to 3.8 when the wall thickness was decreased to about twice the hardened layer depth. The moduli and strengths of all the lattices were found to increase with lattice relative density, and were well predicted by micromechanical models. The lowest relative density (thinnest wall) nitro-carburized hollow truss collinear lattice structures exhibited a specific compressive strength significantly higher than that of any other cellular metal reported to date. Nitro-carburized stainless steel collinear lattices therefore appear to be promising candidates for the cores of lightweight sandwich panels intended for elevated temperature and/or multifunctional applications.
Effect of sintering parameters on mechanical properties and microstructures of B4C/TiB2 ceramic composites
Authors: Sun Junlong , Liu Changxia , Li Bin , Wang Liangshen , Feng Baofu , Xie Zaiyu 
Published: October 2015

Abstract
B4C/TiB2 ceramic composites were fabricated using in-situ reaction and hot-pressing. The effects of sintering parameters on mechanical properties and microstructures of B4C/TiB2 ceramic composites are analyzed and discussed. Composites sintered at 1950°C for 60 min exhibited good mechanical properties. The relationship between bending strength and sintering parameters was similar to that between indentation fracture resistance and sintering parameters. The relationship between Vickers hardness and sintering parameters was consistent with that between relative density and sintering parameters. Analysis of microstructures indicated that the mechanical properties of B4C/TiB2 ceramic composites were affected by the porosity, interface bonding among grains, development of grains and fracture mechanism of the composites.
Novel Simulation Model of Non-Muscle Invasive Bladder Cancer: A Platform for a Virtual Randomized Trial of Conservative Therapy vs. Cystectomy in BCG Refractory Patients
Authors: Patel Sanjay , Dinh Tuan , Noah-Vanhoucke Joyce , Rengarajan Badri , Mayo Kevin , Clark Peter E. , Kamat Ashish M. , Lee Cheryl T. , Sexton Wade J. , Steinberg Gary D. 
Published: October 2015

Introduction: There have been no randomized controlled trials (RCTs) evaluating the clinical or economic benefit of mitomycin C intravesical therapy vs. radical cystectomy in patients with high-risk non-muscle invasive bladder cancer (NMIBC). We used the Archimedes computational model to simulate RCT comparing radical cystectomy versus intravesical mitomycin C (MMC) therapy to evaluate the clinical and economic outcomes for BCG-refractory NMIBC as well demonstrate the utility of computer based models to simulate a clinical trial. Methods: The Archimedes model was developed to generate a virtual population using the Surveillance Epidemiology and End Results database, other clinical trials, and expert opinions. Patients selected were diagnosed with NMIBC (<cT2 disease) who recurred or progressed despite BCG therapy and were randomized to 1) immediate radical cystectomy vs. 2) MMC induction intravesical therapy. Clinical (progression, overall survival, and disease specific survival) and economic outcomes were reported. Results: A total of 1300 virtual patients were evaluation. Progression to MIBC in the MMC treatment arm was 30% over the lifetime. Disease specific death at 5 years was 1.6% and 8.7% for the immediate cystectomy and MMC treatment arms respectively; while, overall death was 17.8% and 23.8% at 5 years. Over a 5-year period the average cost of immediate cystectomy was $64,675 vs $68,517 in the MMC arm. Conclusion: Immediate radical cystectomy after BCG failure for NMIBC has improved survival and is more cost-effective when compared to those undergoing MMC. Simulation of clinical trials using computational models similar to the Archimedes model can overcome shortcomings of real-world clinical trials and may prove useful in the face of current medical cost-conscious era.
Œdipe féminin et destins de l’Œdipe féminin
Authors: Vivès Jean-Michel , Leroy-Viémon Brigitte 
Published: October 2015

Dans son texte de 1931, « De la sexualité féminine », Freud souligne que l’attachement passionnel de la fille pour sa mère reste actif tout au long de la vie, ses motions pulsionnelles étant, dit-il, « incommensurables ». Freud compare ces deux temps de l’Œdipe féminin aux deux moments de l’histoire de l’Antiquité grecque : la culture mino-mycénienne venant être recouverte, en partie seulement, par la culture grecque. À partir de situations cliniques issues de cures et de personnages fictifs tels qu’Électre ou Salomé, les auteurs s’attachent à montrer comment ce premier attachement œdipien peut envahir le second temps, conduisant à obérer le devenir femme.
Le « continent noir ». La femme, la jouissance et la mort
Authors: Abelhauser Alain 
Published: October 2015

Pour Freud, rappelons-le, la femme prend figure d’énigme tant du fait de ce qu’elle est censée désirer que par la façon dont elle s’inscrit dans la construction œdipienne. Pour Lacan, la femme correspond à une inexistence logique. Mais elle témoigne aussi de la manière (difficile) dont s’articulent en elle deux formes de jouissance – la « jouissance Une » et la « jouissance Autre ». Ce qui conduit à distinguer de facto deux modes de traitement de la jouissance : sa limitation par le phallus et son issue par l’amour. De nombreuses situations cliniques mettent en lumière tel ou tel aspect de ces traitements, ou de leur éventuelle inefficacité. Mais parmi elles, il est certains maux – anorexies dites « mentales », « pathologies factices » – montrant plus particulièrement comment quelques femmes s’arrangent de la jouissance qui les encombre en dupant l’autre et surtout en mettant à mal leur corps. Ce qui correspond jusqu’à un certain point aux processus de la perversion. À ceci près que là où celle-ci achoppe, ces femmes, elles, donnent à l’Autre sa pleine consistance en le faisant advenir sous la forme de la mort, et font ainsi preuve du « sérieux » dont le pervers ordinaire est, lui, si singulièrement dépourvu.
Présentation d'ouvrage
Authors: Ré Virginie 
Published: October 2015

La réflexion sur les phénomènes « sectaires », généralement organisée autour de quelques notions qui présupposent le charlatanisme et l’escroquerie, échoue à saisir aussi bien les logiques qui animent ces mouvements que les questions qu’ils soulèvent quant à l’état du lien social dans nos démocraties libérales. Ce sont ces logiques que nous tenterons de discerner dans les linéaments du système délirant édifié par Claude Vorilhon, le leader du groupe. Nous découvrirons alors que ce mouvement, né d’un délire paranoïaque et situé à la croisée de la technoscience et du néolibéralisme, est en parfaite conformité avec les valeurs qui sous-tendent notre époque postmoderne.
LiuHua Oil/Gas Project: First Self-Developed Completion Campaign Using Subsea Horizontal Trees in South China Sea
Authors: Zhong Cheng , Xiaojun Mou , Zigang Sun , Kun Cheng , Wenyan Wu , Xiufu Yang 
Published: October 2015

LiuHua4-1 &LiuHua19-5 oil/gas fields are the first batch of Chinese self-developed projects using subsea production system in the Pearl River Marine Basin (PRMB) of South China Sea. We installed 10 sub-sea horizontal trees by a single hull vessel "HYSY708" and a semi-submersible "NH5" in the block, the completion execution phase was performed on Moored Mobile Offshore Drilling Units (MODU) with no prior experience in subsea completions from June 2011 to January 2014. Value creation activities were employed to raise the awareness and competence of the rig team to transform improvement opportunities into high performance goals.
This paper presents an integrated completion program developed and implemented for reservoir characterization and formation evaluation in South China Sea. Completion fluid and treatment fluid were carefully selected and tested for well-specific conditions. The program used a combination of various completion techniques such as material corrosion, hydrate prevention, subsea horizontal tree installation, work string design optimization, subsea canned dual ESP completion system, intelligent well completion, emergency response in complex condition, etc. The integrated completion programs were designed and modified to meet the project delivery timeline and cost constraints, while responding to the challenge of properly testing the oil/gas reservoir.
This paper also presents completion data analysis results and summarizes the encountered challenges and learned lessons from field operations. Specifically, we present field operation results and explain the key program elements.
The learned lessons and gained experiences from the field operation presented here provide valuable guidance for future deep-water oil /gas exploration and development operations.
From Design, Installation and Commissioning of an Electrically Trace Heated Integrated Production Bundle
Authors: Quenot C. , Carvalho C. , Hanonge D. , Fontes F. , Beça I. , Knapp S. , Condessa D. S. , Damno G. S. , Gonçalves W. P. 
Published: October 2015

Abstract
The Papa Terra oil field is located on the BC-20 Block in the Campos Basin - Brazil (110 kilometers away from Rio de Janeiro state coast) in a water depth of 1,200 meters.
The field is operated by Petrobras having Chevron as non-operator partner. Papa Terra has a crude oil with an API index between 14 and 17 degrees. The field is among one of the most complex subsea developments ever executed in Brazil with its first oil performed in 2013 and the production subsea facilities installation completed in 2014.
The proposed design for the subsea production system was the use of an Electrically Trace Heated Integrated Production Bundle (ETH-IPB), the 3rd generation of this field proven technology, which was successfully designed, manufactured and installed by Technip on previous West African projects. A total of 27 km of ETH-IPB riser and flowline as well as its own electrical and monitoring module have been designed, manufactured, installed and successfully commissioned for the Papa Terra project.
The core of the ETH-IPB is a 6" ID flexible pipe dedicated to production fluid. Around the core, the following components are distributed into a bundle layer:Heat tracing cables designed to provide active heating of the production fluid during warm up or after a shut-down.A Distributed Temperature Sensor (DTS) fiber optic system, deployed offshore into a stainless steel tube loop in order to provide temperature monitoring along the length of the riser and flowline system.Spacers, designed to protect the electrical cables and fiber optic tubes from mechanical loadings during installation and manufacturing.
The main aim of this paper is to describe the design of this production system, that was used for the first time in Brazil and which present a lot of innovations in several domains, due to overall length, thermal requirements, heating control and riser to flowline electrical connection on the seabed. Some results of the qualification program will be presented, in particular mechanical, bundle components, fatigue and thermal performance tests.
Finally, results of the field performance tests and operational feedback by Petrobras will be presented and discussed.
Productivity Index Dynamics: Coupling the Material Balance Equation With the Deconvolved Pressure Response
Authors: Kubota L. 
Published: October 2015

The productivity index (PI) conveys information on the reservoir productive capacity and can be measured during well tests. It is defined as the ratio of the production flowrate q and the pressure drawdown. As a result, the PI dynamic behavior is dominated by a transient period (henceforth referred to as transient PI) which is followed by a pseudo-steady state regime. This works deals with the former, since the latter is rarely witnessed during well tests.
Usually, the pressure drawdown employed in PI calculations is measured as the difference between a constant reservoir pressureand the downhole flowing pressure pwf(t). In this paper, it is shown that, by coupling the under-saturated material balance equation with the deconvolved pressure response ?pDEC (t) and its associated flowrate qDEC, it is possible to account for a time-varying average pressure . The algorithm is valid for reservoirs whose behavior during a well test is modelled by a closed geometry, but has not yet reached the pseudo-steady state flow regime.
Subsequently, a comparison will be drawn regarding the transient PI evaluated under a constant average pressure against the transient PI evaluated with a decreasing average pressure. We will also study the conditions where the assumption of constant reservoir pressure will lead to a reliable estimate of the transient PI. The procedure will, then, be applied to a field case, where the constant pressure assumption leads to a significantly undervalued PI.
The Contribution from an Operator's Global Subsea Hardware Standardization Program to 10K Subsea Hardware and Controls on Parque das Conchas (BC-10)
Authors: Freire de Carvalho Thiago Palmeira , Olijnik Luiz , Broderick Richard John , Labes Alan 
Published: October 2015

The Parque das Conchas field in Campos basin offshore Brasil is a phased ultra-deepwater heavy oil development tied to the Esp rito Santos floating, production, storage and offload (FPSO) vessel, moored at a water depth of 1,780-meters. The subsea system utilizes a subsea boosting and separation technology, enhanced recovery through water and gas injection, subsea sampling, enhanced vertical deepwater trees (EVDT), steel lazy wave catenary risers, and high voltage multiplexed electro-hydraulic steel tube umbilicals. During its nine year development since sanctioning, the professionals, installation contractors, commercial and contractual conditions have changed and played their role on the successful deployment of the subsea systems architecture. The project's successful track history to date is largely attributed to the development and consistent application of standardized subsea hardware throughout its three distinct and independently developed phases.This paper addresses the standardized features applied to the 10,000-psi (10K) rated subsea system components at BC-10: EVDT systems and tooling, including the upper completion tools which allowed deployment through either a subsea or surface blow-out preventer; completion and intervention riser systems on the lower riser package; retrievable flow modules and flow meters; production and injection jumper kits; manifolds; subsea boosting and separation; subsea control modules; umbilicals and subsea distribution hardware. This paper also addresses how these features fit within the operator's global subsea hardware standardization program, and provides examples on how continuous improvement, lessons learned and innovations are implemented in that program.
Analysis of Moored Tankers as a Diesel Hub
Authors: Ferreira M. D. , Azevedo A. 
Published: October 2015

Diesel oil provision to production and drilling offshore units employing the use of platform supply vessels (PSVs) raises some logistic difficulties regarding time spent in the available terminals by the PSVs during the diesel loading operation in order to access the terminal, follow the queue, load the diesel, and leave the terminal.
An alternative to this approach would be the mooring of a diesel tanker offshore and its use as a Hub, in order to dispatch oil to the PSV fleet. Following this new approach, Petrobras projected and installed some buoys, moored by a single line to a fixed point and capable of receiving available tankers with 16,000 ton of deadweight. It is desirable nowadays to improve the size of these ships, as there are larger ones available in the fleet to perform this job, or else they will be scrapped. The full scale and the numerical models of the behavior of these ships present fishtailing phenomenon, which gets worse when we increase the dimensions of the ships.
In order to model the behavior of these anchored tankers, the computer code Wamit was employed in the frequency domain, and through the use of impulse response functions, we accessed the ships behavior in waves in the time domain. The wind and current actions were represented by a Morison like formulation, using constant coefficients and assuming a force proportional to the relative velocity squared. The mooring lines were represented by a FEM truss model.
Results were obtained for three classes of ship: Petrobras Class 35, 43 and 47, which have 16,000, 38,000 and 40,000ton of deadweight capacity. The class 35 tankers are already being employed as a Diesel Hub for the PSVs. Based on the results presented herein a pilot test using a class 47 tanker is underway, with its position and motions fully monitored during the whole test, in order to compare its behavior with the numerical estimates.
A Case Study on the Implementation of an Acoustic Automatic Leak Detection Sonar (ALDS) in GoM and its Application to Current and Future Brazilian Fields
Authors: Brown G. , Fasham S. , Tomlinson P. , Crook R. 
Published: October 2015

The authors have developed an active acoustic Automatic Leak Detection Sonar (ALDS) designed to detect hydrocarbon leaks (mono and multi-phase oil and gas) at significant ranges, allowing coverage of wide areas from a single sensor. The system's single subsea sensor offers 360 degree continuous coverage providing automatic, robust detection and localisation of any leak, followed by an alert within tens of seconds of a leak developing.
This paper provides a case study of an experimental programme where the system was trialled in deep water (2000 m) at the Thunderhorse field in the US Gulf of Mexico. We will describe the principles of operation and theoretical performance of the system and compare this to the actual performance in-situ where simulated oil and gas releases were used to identify the system performance limits. Results will be provided for a simulated single phase oil leak of approximately 100 barrels a day and gas detection leaks of as little as 1 litre per minute. The trials include detections with subsea infrastructure (wellheads, manifolds etc.) between the leak location and the sensing head.
The results demonstrate the efficacy of active acoustic leak detection over ranges in excess of 600 m from the sensing point, as well as good discrimination of leaks against other acoustic targets resulting in an exceptionally low false alarm rate.
Finally learning points from the trials regarding the CONcept of OPerationS (CONOPS) for permanently deployed leak detection systems will be discussed with a description of how an active acoustic leak detection system can best be implemented in a variety of scenarios during the life of a field, from exploratory drilling through to production and decommissioning. Particular reference will be made to how this applies to already producing and planned Brazilian field devlopments addressing retrofit and new build requirements.
ALDS can be used as a regulatory tool but can also bring value to operators by identifying and enabling early intervention on the small leaks which often prefigure large hydrocarbon releases, reducing the likelihood major environmental damage and protecting reputation.
Successful Application of Drilling Optimization Methodology and Integrated Solutions in a Pre-Salt Well
Authors: Pinheiro Marcus , Carneiro Rafael , Lima Angelo 
Published: October 2015

Abstract
Improvement to the efficiency of pre-salt well delivery was achieved by implementing detailed planning with cross discipline teams who developed a complete vibration mitigation program that became indispensable in critical wells, such as the ones in Ultra Deep Water Pre-Salt. For this study, it was analyzed a critical well that was drilled in a pre-salt field in Brazil, with 1700m of salt section.
This paper discusses the development and deployment of a successful drilling optimization methodology and the application of new technologies and solutions to improve the drilling efficiency in a critical presalt well. The ability to rapidly analyze conditions and respond effectively was based on multiple solutions such as: engineering simulators and workflows, vibration mitigation through surface and downhole measurements, optimization of specific energy, use of a bit reamer and an anti-stall tool on BHA to attenuate torsional vibrations, applied fluid optimization, salt creep control, real time monitoring and integrated services.
For vibration mitigation improvement it was used a specific tool to attenuate torsional vibration downhole and the fast Fourier transform software, that analyses surface parameters every second and identify the torsional vibration faster than the downhole sensors. The Mechanical Specific Energy (MSE) concept was extremely important to identify any excess of energy input that could cause damage to the downhole tools and drill string. This concept also helped to identify formation changes (anhydrite and halite), very important for casing point (geo-stopping at basal anhydrite). The use of bit reamer also showed to be a very helpful tool to keep the well in gauge and avoid salt creeping near the bit. The "Profibus" protocol was implemented to permit a real time monitoring of the pilot hole and riserless sections.
The successful implementation of this methodology depended on the integration of disciplines and professionals involved setting a common goal for all stakeholders. This resulted in the salt section being drilled with high penetration rates in only one run, identifying every formation change and responding appropriately and the ability to stop in the desired section at the top of reservoir. As a result of the drilling optimization, the total depth was reached 60 days ahead of the planned time establishing a new benchmark for the pre-salt field.