bluuebunny/crossref_metadata_2025_split huggingface dataset:
PAZFLOR Flexible Riser Diverless Bend Stiffener Fixation: Successful Innovation From Concept to Project Implementation
Authors: Decoret Laurent , Bastard Laurent , de Kerdanet Tegwen 
Published: August 2013

For the TOTAL E&P Angola (TEPA) PAZFLOR field development, the decision was taken at the tender stage to propose an innovative diverless Bend Stiffener Fixation system (BSF) to connect the flexible risers to the FPSO. Avoiding diving intervention was driven primarily in order to minimize weather downtime during this critical offshore installation phase.
Technip decided to develop its own system to retain full control of the design process and ensure it fulfilled all the installation constraint requirements. The patented system consists of a 3 part clamp activated by a hydraulic motor controlled from topside. An innovative disconnection device is used to release the riser pulling head once the bend stiffener is clamped to the I-tube. The development of the BSF was handled by an integrated team as a “project within the project”. From the start a robust design gate review process was applied to rapidly freeze the design of the system main components and enable the initial order placement of the long lead items. This was critical to ensure on time delivery to the FPSO Contractor. Extensive full scale testing was performed to ensure good reliability of all the system components. This testing enabled further optimization of parts of the system, particularly the items mounted on the risers to provide the maximum operability. Finally the involvement of the installation team from the onset ensured that robust installation procedures and operations were developed. The hook-up operations for the 21 risers was conducted safely with no weather downtime and with a riser connection cycle faster than planned.
This proves that implementation of innovative design solutions can be successfully managed from initial concept to final installation within a project environment, ultimately enabling faster hand over for first oil.
Reliability of Axially Loaded Jacket Pile
Authors: Ronold Knut O. , Bergan Jens , Arnesen Knut , Guttormsen Tom R. 
Published: August 2013

A reliability study of an axially loaded jacket pile in sand for prediction of the failure probability in compression is presented. The study is based on full probabilistic modelling of axial load and axial capacity by their respective probability distributions. A first-order reliability method (FORM) is used for probability calculations.
Results by three novel axial capacity models are given, viz. the so-called UWA, ICP and NGI methods specified in ISO19902. Results by a fourth artificial method, whose capacity prediction is taken as the average of the predictions by the three other methods, are also given. Method-specific model uncertainty factors are applied, calibrated by means of a data base for piles in sand reported by UWA.
Emphasis in this paper is on presentation of results of the reliability analyses and on various sensitivity studies including two different failure criteria. The results illustrate that the novel design methods predict pile capacity with significant variability. The data base used for validation of the new design methods may therefore be judged inadequate, and the need for more large scale test results seems imperative to ensure a consistent safety level when these methods are used in design.
Development of a Performance Assessment Model (PAM) for High Complexity Non-Conventional Reservoirs
Authors: Riaño Caraza Juan M. , Flores Avila Fernando S. , Faría Rojas Iván , Brito Rodríguez Luis E. 
Published: August 2013

Chicontepec is one of the areas with the largest volume of original oil in place in Mexico; however, after more than 30 years of operation, its development has been very limited due to the high geological complexity and low rock quality of their reservoirs. The reservoirs are found in layered sequences of sediments deposited in turbiditic environments which have suffered different degrees of diagenesis, there is a great level of vertical heterogeneity and a very limited level of lateral continuity. The permeability of the reservoir area is in the range of 0.1 to 5 md, depending on the location and degree of diagenesis, with this level of permeability most wells require hydraulic fracturing to be produced economically. The volume of oil originally in place according to the latest certifications is around 130 billion barrels, of which to this date have been produced 200 MMbls, which represents a current recovery factor of 0.15%.
In order to accelerate the development of reserves PEMEX has diversified efforts assigning some areas to other companies. This will provide greater ability to assess best practices and technologies. To evaluate the efforts of companies a performance assessment model was designed, which takes into account the integral complexity of each area to be fair in comparing the results obtained for the different areas. The aim of this paper is to describe the methodology used in the developing of the performance evaluation and integral complexity characterization models.
Dynamic Evaluation of Invasion and Backflow in Carbonate and Sandstone Reservoirs
Authors: Silveira Bruno O. , Moreno Rosangela B. Z. L. 
Published: August 2013

This work aims to compare the drilling fluid invasion and oil backflow in sandstone and carbonate samples in order to evaluate the influence of kind of rock in the formation damage and its interaction with the drilling tested fluid.
The tests were performed in sandstone and carbonate samples with similar gas absolute permeabilities and under a protocol test in steps that included preparation, characterization, multiphase flow, drilling fluid invasion and oil backflow.
During the work it was observed that carbonate samples were less water wet than sandstone samples. From the obtained results for longer samples was possible to follow the advancing front of the invading fluid with pressure observations along the core. The dynamic flow permitted to conclude that invasion in carbonate samples was faster than in sandstone. It was also observed that in carbonate samples the backflow presented a higher and faster productivity return when compared with sandstone results.
Evaluation on Explicit Coupling Between Reservoir Simulators and Production System
Authors: von Hohendorff Filho João Carlos , Schiozer Denis José 
Published: August 2013

Various methodologies to model the coupling of reservoirs and production systems have been applied in the oil industry in recent years due to the need to model properly the integrated solution of models that represent the flow of fluids through the reservoir to the surface.
These methodologies are used to solve the production forecast of multiple reservoirs, sharing production platforms with limited production e injection capacities ruled by complex production systems. They can be grouped into two basic types: implicit and explicit coupling methodologies.
Explicit methodology can be an efficient choice to integrate simulations because allows coupling adequate simulators to model the whole system and also to grant flexibility in study of well management alternatives. However, it is necessary to test this type of procedure to check the quality of the results. Therefore, a validation study of explicit coupling methodology is presented in this work where the production system is tested on common operating conditions during production and injection of fluids, verifying benefits and limitations of explicit methodology. Some methods for improving the explicit response are proposed and evaluated.
An example of application verifies the gain of flexibility in well prioritization by the group management obtained by use of an external methodology for reservoir simulator.
The explicit coupling, as implemented, has shown a satisfactory result for the integration between the simulators, honoring all operating constraints set in evaluation cases. Some correction methodologies are necessaries to obtain stabilized results.
New Design Analysis Procedure of Ultra Deepwater Drillships
Authors: Wang Xiaozhi , Hwang Jeong Heon , Yan Yuhai , Jeong Ho-hyun 
Published: August 2013

The technical challenges for the structural design of the new ultra deepwater generation of drillships are optimized hull designs that include greater functionality, flexibility and operational efficiency. Compared with traditional design, some drillship structural designs may not include crude oil storage capacity and the vessel is likely to have less deck area. In addition, they are generally free of equipment on deck and are more compact with an increased integrated hull and drilling system arrangement. This calls for a comprehensive and practical procedure for drillship structural design and verification.
This paper describes an advanced design and analysis procedure to address the strength and fatigue requirement which is applicable to all types of drillship structures. With the presumption of unrestricted service operations, the study evaluates structural strength of the drillship in different operating environments (e.g., transit, normal drilling, severe storm), under a variety of operating scenarios and transit conditions. Site-specific conditions with specified probabilities are considered for fatigue evaluation. The presented procedure includes initial prescriptive scantling assessment, comprehensive finite element strength assessment, fatigue assessment, strength and fatigue criteria.
Application of Parametric Surfaces in Contact Assessment Between Two Floaters in Side by Side Operations
Authors: de Menezes Fabio Gouveia Telles , Jacob Breno Pinheiro , Albrecht Carl Horst , Corrêa Fabrício Nogueira 
Published: August 2013

In front of the growing demand for natural gas, alternative solutions have been adopted to export the production to the several available markets. Conventional gas carriers have been converted to regasification units to operate close to the shore, treating the gas and delivering it to carriers which take the product to the shore. Side by side configurations for the gas transference by loading arms are common, and the reduce distance between the ships is the main challenge.
For such application a time domain simulation is demanded. Due to the close proximity between the ships, at each time step, their distance has to be calculated in order to predict eventual ship to ship or ship to fenders collisions.
When the ships are modeled by conventional meshes the interference analysis every time step is excessively time consuming, the use of parametric surfaces reduces the number of elements to be checked against each other and saves computational cost. The precision is also improved since the hull shapes are fully represented in comparison to the panel approximation provided by the meshing approach.
The contact verification plays a fundamental role for that type of analysis and the gains obtained by the parametric surfaces appliance are significant.
Large-Scale Analysis and Local Stress Assessment of Flexible Unbonded Pipes Using FEA
Authors: Edmans Ben , Alfano Giulio , Bahai Hamid 
Published: August 2013

Lifespan assessment of flexible risers involves the evaluation of fatigue parameters, requiring accurate predictions of stresses and their variation in pipe components. For predicting the effect of complex three-dimensional nonlinear dynamics on component stress histories, multi-scale methods can combine generality of application with computational efficiency. In this paper, we describe the development of a two-scale computational homogenisation procedure linking a coarse-scale analysis model using specialised beam elements, and a detailed stress prediction model consisting of a pipe section with components modelled with shell elements and frictional contact interactions.
To use the procedure, the detailed model first functions as a virtual test rig, by which parameters of the global model may be determined. For detailed stress prediction, the global model is tested under the operating conditions of interest providing a set of generalised strains which are applied to the detailed model. The models are implemented in the general-purpose finite-element package Abaqus. As key aspects of the procedure, we show how generalised stresses and strains can be imposed on the detailed model uniformly without introducing spurious boundary effects and demonstrate how local stresses can be determined using strain data from the global model.
Comparison Behavior of Tensile Tests for GFRP Filament Wound Pipes With Two Different Sectional Areas Regarding High Temperature
Authors: Ortenzi Altibano , de Carvalho Jonas , Corvi Andrea 
Published: August 2013

In this work were compared two types of filament wound pipe specimens to know the variation in stress and strain regarding to the cross sectional area variation at 65° C according to the standards. The groups are named as G1 and G2, respectively with the G1 having 63.5mm of internal nominal diameter, and the G2 having 76.2mm. Both groups had 800mm of length, 3.5 mm of wall thickness and tabs laminated with 200 mm length. It was applied a monotonic load with a rate of 6.35 mm/minute. Three strain gages were positioned circumferentially and other three axially oriented at the specimen middle span.
The high temperature was controlled by thermo pairs and the thermal box was heated up to reach the test temperature. So the tests were carried out up to failure of the specimens. The results showed that the sectional area may affect the strain at higher temperatures above of 50 °C. It was also noted variations between both groups regarding their strength capacity, mainly at the serviceable limit state of loading, which was determined by the first lost of loading followed by any kind of possible damage — matrix cracking, delaminating or fiber fracture. It could be noted that for high pressure and severe conditions use, the serviceable limit state is the most appropriated level that one should consider when designing glass fiber reinforced polymer to use in pipelines and others offshore structures subjected to internal and external loading pressures.
Effective DQE (eDQE) for monoscopic and stereoscopic chest radiography imaging systems with the incorporation of anatomical noise
Authors: Boyce Sarah J. , Choudhury Kingshuk Roy , Samei Ehsan 
Published: August 2013

Purpose:Stereoscopic chest biplane correlation imaging (stereo/BCI) has been proposed as an alternative modality to single view chest x‐ray (CXR). The metrics effective modulation transfer function (eMTF), effective normalized noise power spectrum (eNNPS), and effective detective quantum efficiency (eDQE) have been proposed as clinically relevant metrics for assessing clinical system performance taking into consideration the magnification and scatter effects. This study compared the metrics eMTF, eNNPS, eDQE, and detectability index for stereo/BCI and single view CXR under isodose conditions at two magnifications for two anthropomorphic phantoms of differing sizes.Methods:Measurements for the eMTF were taken for two phantom sizes with an opaque edge test device using established techniques. The eNNPS was measured at two isodose conditions for two phantoms using established techniques. The scatter was measured for two phantoms using an established beam stop method. All measurements were also taken at two different magnifications with two phantoms. A geometrical phantom was used for comparison with prior results for CXR although the results for an anatomy free phantom are not expected to vary for BCI.Results:Stereo/BCI resulted in improved metrics compared to single view CXR. Results indicated that magnification can potentially improve the detection performance primarily due to the air gap which reduced scatter by ∼20%. For both phantoms, at isodose, eDQE(0) for stereo/BCI was ∼100 times higher than that for CXR. Magnification at isodose improved eDQE(0) by ∼10 times for stereo/BCI. Increasing the dose did not improve eDQE. The detectability index for stereo/BCI was ∼100 times better than single view CXR for all conditions. The detectability index was also not improved with increased dose.Conclusions:The findings indicate that stereo/BCI with magnification may improve detectability of subtle lung nodules compared to single view CXR. Results were improved with magnification for the smaller phantom but not for the larger phantom. The effective DQE and the detectability index did not improve with increasing dose.
Complete Genome Sequence of Cyanobacterial Siphovirus KBS2A
Authors: Ponsero Alise J. , Chen Feng , Lennon Jay T. , Wilhelm Steven W. 
Published: August 2013

ABSTRACT

We present the genome of a cyanosiphovirus (KBS2A) that infects a marine
Synechococcus
sp. (strain WH7803). Unique to this genome, relative to other sequenced cyanosiphoviruses, is the absence of elements associated with integration into the host chromosome, suggesting this virus may not be able to establish a lysogenic relationship.
Genome Sequence of Salmonella bongori Strain N268-08, a Rare Clinical Isolate
Authors: Marti Roger , Hagens Steven , Loessner Martin J. , Klumpp Jochen 
Published: August 2013

ABSTRACT

Salmonella bongori
is a close relative of the highly virulent members of
S. enterica
subspecies
enterica
, encompassing more than 2,500 serovars, most of which cause human salmonellosis, one of the leading food-borne illnesses.
S. bongori
is only very rarely implicated in infections. We here present the sequence of a clinical isolate from Switzerland,
S. bongori
strain N268-08.
Genome Sequence of the Food Spoilage Yeast Zygosaccharomyces bailii CLIB 213
T
Authors: Galeote Virginie , Bigey Frédéric , Devillers Hugo , Neuvéglise Cécile , Dequin Sylvie 
Published: August 2013

ABSTRACT

The ascomycetous yeast
Zygosaccharomyces bailii
is one of the most problematic spoilage yeasts in food and beverage industries, due to its exceptional resistance to various stresses. A better understanding of the molecular mechanisms underlying these stress resistance phenotypes might help develop strategies to improve food quality. Thus, we determined and annotated the genome sequence of the strain
Z. bailii
CLIB 213
T
(= CBS 680).
Draft Genome Sequence of Lactobacillus gasseri Strain 2016
Authors: Karlyshev Andrey V. , Melnikov Vyacheslav G. , Kosarev Igor V. , Khlebnikov Valentin C. , Sukhikh Gennady T. , Abramov Vyacheslav M. 
Published: August 2013

ABSTRACT

Different common factors contribute to the antagonistic properties of
Lactobacillus gasseri
toward various pathogens. However, there is strain-to-strain variation in the probiotic properties of this bacterium. The draft genome sequence of
L. gasseri
strain 2016 determined in this study will assist in understanding the genetic basis for such variation.
Complete Genome Sequence of a Very Virulent Porcine Epidemic Diarrhea Virus Strain, CH/GDGZ/2012, Isolated in Southern China
Authors: Tian Ye , Su Danping , Zhang Haiming , Chen Rui-ai , He Dongsheng 
Published: August 2013

ABSTRACT
The classical symptoms of porcine epidemic diarrhea (PED) are acute diarrhea and dehydration. The isolated porcine epidemic diarrhea virus (PEDV) CH/GDGZ/2012 strain was obtained from the feces of diseased pigs in 2012 in southern China. We report the complete genome sequence of strain CH/GDGZ/2012, which might be useful for better understanding the molecular characteristics of this virus.
Complete Genome Sequence of the Encephalomyelitic Burkholderia pseudomallei Strain MSHR305
Authors: Stone Joshua K. , Johnson Shannon L. , Bruce David C. , Detter J. Chris , Mayo Mark , Currie Bart J. , Gelhaus H. Carl , Keim Paul , Tuanyok Apichai 
Published: August 2013

ABSTRACT

We describe the complete genome sequence of
Burkholderia pseudomallei
MSHR305, a clinical isolate taken from a fatal encephalomyelitis case, a rare form of melioidosis. This sequence will be used for comparisons to identify the genes that are involved in neurological cases.
Draft Genome Sequences of Five Strains of Lactobacillus acidophilus, Strain CIP 76.13
T
, Isolated from Humans, Strains CIRM-BIA 442 and CIRM-BIA 445, Isolated from Dairy Products, and Strains DSM 20242 and DSM 9126 of Unknown Origin
Authors: Falentin Hélène , Cousin Sylvie , Clermont Dominique , Creno Sophie , Ma Laurence , Chuat Victoria , Loux Valentin , Rüdiger Pukall , Bizet Chantal , Bouchier Christiane 
Published: August 2013

ABSTRACT

Lactobacillus acidophilus
is a natural inhabitant of mammalian gastrointestinal systems and is used in dairy and pharmaceutical products. Five draft genome sequences, covering 1,995,790 nucleotides (nt) on average, are divided into 19 to 34 scaffolds covering 1,995 to 2,053 genes. The draft genome sequences were compared to the sequence of the
L. acidophilus
NCFM dairy strain.
Draft Genome Sequences of Vibrio cholerae O1 ElTor Strains 2011EL-301 and P-18785, Isolated in Russia
Authors: Kuleshov Konstantin V. , Vodop'ianov Sergey O. , Markelov Mikhail L. , Dedkov Vladimir G. , Kermanov Anton V. , Kruglikov Vladimir D. , Vodop'ianov Alexey S. , Pisanov Ruslan V. , Mazrukho Alexey B. , Shipulin German A. 
Published: August 2013

ABSTRACT

We report the draft whole-genome sequences of two
Vibrio cholerae
O1 strains, the environmental toxigenic strain 2011EL-301 and the clinical nontoxigenic strain P-18785, both isolated in Russia. Some basic data comparing the two against the GenBank repository are provided.
Draft Genome Sequences of Lactobacillus equicursoris CIP 110162
T
and
Lactobacillus
sp. Strain CRBIP 24.137, Isolated from Thoroughbred Racehorse Feces and Human Urine, Respectively
Authors: Cousin Sylvie , Loux Valentin , Ma Laurence , Creno Sophie , Clermont Dominique , Bizet Chantal , Bouchier Christiane 
Published: August 2013

ABSTRACT

We report the draft genome sequences of strain

Lactobacillus equi
cursoris

CIP 110162
T
, isolated from racehorse breed feces, and
Lactobacillus
sp. strain CRBIP 24.137, isolated from human urine; the two strains are closely related. The total lengths of the 116 and 62 scaffolds are about 2.157 and 2.358 Mb, with G+C contents of 46 and 45% and 2,279 and 2,342 coding sequences (CDSs), respectively.
Hospital care of children with a cleft in England
Authors: Fitzsimons Kate J , Copley Lynn P , Deacon Scott A , van der Meulen Jan H 
Published: August 2013

ObjectiveTo analyse hospital admissions in the first 2 years of life among children with cleft lip and/or palate in England.DesignAnalysis of national administrative data of hospital admissions.SettingNational Health Service hospitals.PatientsPatients born alive between 1997 and 2008 who underwent surgical cleft repair.Outcome measuresNumber of admissions, including the birth episode, and days spent in hospital were examined. Children were analysed according to cleft type and whether or not they had additional congenital anomalies.Results10 892 children were included. In their first 2 years, children without additional anomalies (n=8482) had on average 3.2 admissions and 13.2 days in hospital, which varied from 2.6 admissions and 9.2 days with cleft lip to 4.7 admissions and 19.7 days with bilateral cleft lip and palate (BCLP). Children with additional anomalies (n=2410) had on average 6.7 admissions and 51.4 days in hospital, which varied from 6.4 admissions and 48.5 days with cleft palate to 8.8 admissions and 67.5 days with BCLP. The mean number and duration of cleft-related admissions was similar in children without (1.6 admissions and 6.4 days) and in those with additional anomalies (1.5 admissions and 8.5 days). 35.2% of children without additional anomalies had at least one emergency admission, whereas the corresponding figure was 67.3% with additional anomalies.ConclusionsThe burden of hospital care in the first 2 years of life varied according to cleft type and presence of additional anomalies. However, cleft-specific hospital care did not differ between children with and without additional anomalies.