bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Comparison of Cessation Counseling Received by Current Smokers at US Dentist and Physician Offices During 2010–2011
Authors: Agaku Israel T. , Ayo-Yusuf Olalekan A. , Vardavas Constantine I. 
Published: June 2014

Objectives. We compared patient-reported receipt of smoking cessation counseling from US dentists and physicians. Methods. We analyzed the 2010 to 2011 Tobacco Use Supplement of the Current Population Survey to assess receipt of smoking cessation advice and assistance by a current smoker from a dentist or physician in the past 12 months. Results. Current adult smokers were significantly less likely to be advised to quit smoking during a visit to a dentist (31.2%) than to a physician (64.8%). Among physician patients who were advised to quit, 52.7% received at least 1 form of assistance beyond the simple advice to quit; 24.5% of dental patients received such assistance (P < .05). Approximately 9.4 million smokers who visited a dentist in 2010 to 2011 did not receive any cessation counseling. Conclusions. Our results indicate a need for intensified efforts to increase dentist involvement in cessation counseling. System-level changes, coupled with regular training, may enhance self-efficacy of dentists in engaging patients in tobacco cessation counseling.
An Innovative Fluid Pressure Transmission Pill Successfully Used During Managed Pressure Drilling Operations in an HTHP Environment
Authors: Ronæs Egil , Prebensen Ole Iacob , Mikalsen Renate , Taugbøl Knut , Syltøy Svein , Torvund Steinar 
Published: June 2014

Abstract
To successfully perform a Managed Pressure Drilling (MPD) operation in a high-temperature, high-pressure (HTHP) field offshore Norway, an innovative fluid technology was developed for well control purposes. The drilling fluid used in MPD mode had insufficient density for tripping operations. To balance the reservoir pressure when tripping, an isolation pill was spotted in the upper part, leaving dense fluid on top of the well and making the total hydrostatic pressure in the fluid column sufficient for well control.
This development pill enabled pressure to be transmitted to the bottom of a well by placing the pill in between a dense fluid on top of a less dense fluid. The design and properties of this pill made it possible to run test wireline logs and eventually a test liner run through the pill, and at the same time, maintain a pre-determined hydrostatic pressure to keep the well under control without externally applied pressure. In addition, the pill did not cause instability by interfacing different density fluids as this would have a dramatic impact on the hydrostatic pressure. One of the criteria was to displace the pill out of the well by using the circulating system only. As this paper describes, the pill stayed intact during the entire operation and displacement of the pill from the wellbore was performed successfully.
Another benefit observed was the lack of remedial treatment needed at surface when the pill was circulated out. As this was a solids-free pill, no additional treatment was required.
This paper describes in detail the development of the fluid pressure transmission pill and the purpose of using such a pill, including testing performed, and the final result of using the pill for the first time in a well exposed to open reservoir.
60 Days Ahead of Schedule—Reducing Drilling Risk at Valhall Using Computational Geomechanics
Authors: Kristiansen Tron Golder , Flatebø Roar Egil 
Published: June 2014

Abstract
The Valhall field is an over pressured, undersaturated Upper Cretaceous chalk reservoir located in the Norwegian sector of the North Sea. The reservoirs are consisting of weak chalk. The weak chalk results in significant reservoir compaction, exceeding 10 meters in places, and corresponding seafloor subsidence, exceeding 6 meters above the center of the field. Previous papers have documented the increasing drilling challenges in the shale overburden at Valhall due to the subsidence. This paper presents the computational geomechanics technology developed and implemented to assist drilling into the highly depleted and compacted crest from the new water injection platform at Valhall. The work is focusing on handling the stress changes occurring in the overburden above a compacting reservoir and not the more traditional situation associated with depleted induced fracture gradient changes in the reservoir itself. The technology is based on a history matched full field finite element based geomechanics model to calculate stresses, strains and displacements. The results are exported from the finite element model to GOCAD in order to do wellbore stability calculations using BP's Well Planning Toolkit (WPTK). In this environment one can also easily use supporting data as 4D seismic from the permanent Life of Field Seismic array at Valhall. The paper describes the process used for implementing and verifying the technology. By calculating the operational mud weight window over a high risk interval in the overburden a good correlation to historical non-productive time was found. The methodology is used in detailed well planning where only moving the well 50 meters in one direction can result in problem free drilling or challenges. The paper presents the first application of this technology on a new water injector delivered 60 days ahead of schedule with reduced costs at around 20 million USD and a potential train wreck avoidance of 60 million USD.
PVT Properties, Wettability and Capillary Forces in Unconventional Gas Reservoirs: Topics Rarely Visited
Authors: Lakatos I. , Bódi T. , Lakatos-Szabó J. , Szentes G. 
Published: June 2014

Abstract
The unconventional gas reservoirs usually have extremely low permeability, small average pore sizes, and often absolute water-wet surface character. As a result, the residual water saturation and the critical capillary pressure needed to mobilize water from natural porous systems might also be unexpectedly high. Therefore, a detailed laboratory studies have been carried out with the aim at determining the detrimental effects of pore structure, wettability, capillary and imbibition forces, and permeability in tight sand gas and BCGA reservoirs. Based on experimental results, it was proved that the water was a natural blocking phase. Namely, the water may cause serious formation damaging hard to cure when the reservoirs were ever contacted with water. Hence, the operators definitely face with difficulties when water-based fluids are used in drilling, well completion, fracturing, and production technologies. Consequently, the physico-chemical considerations suggest that application of water-free fluids is recommended in any phases of field operations. Similar difficulties are arising in respect to gas transport in tight media. Since the mass transport is usually diffusion, the driving force of gas production should be treated with weaponry of physico-chemical approach and thermodynamic calculations. The paper to be presented will also focus on critical PVT problems of fluids saturating the reservoir space. It will be shown that gas/liquid equilibrium of some fluids (e.g. water and heavy hydrocarbons) and supercritical phase equilibrium of light hydrocarbons, CO2 and H2S may have significant influence on rate and composition of gas production. Thus, new paradigms and theoretical approach are necessary in the future, and further fundamental and applied research seems to be indispensable to develop novel recovery technologies for gas recovery from unconventional gas reservoirs.
Data Assimilation by Use of the Iterative Ensemble Smoother for 2D Facies Models
Authors: Zhang Yanhui , Oliver Dean S. , Chen Yan , Skaug Hans J. 
Published: June 2014

Summary
The ensemble Kalman filter (EnKF) and related ensemble-based smoothers are well-suited to history match reservoir models that are multivariate Gaussian. Estimating categorical variables such as facies types is much more difficult with the EnKF, especially when the variables have complex transitional dependencies. In a previous study, the EnKF was used for updating third-order Markov-chain models in one dimension with an efficient post-processing step to ensure that the posterior samples are constrained by the prior. The efficiency of the post-processing step depended on the use of an optimization algorithm (Viterbi algorithm) that is not directly applicable in higher dimensions.
In this paper, the post-processing step is carried out with a sequential noniterative optimization algorithm that readily extends to higher dimensions. An iterative ensemble-based data-assimilation method by use of Levenberg-Marquardt (LM) regularization—namely, LM ensemble randomized maximum likelihood (LM-EnRML)—is used to update reservoir properties to honor production data disregarding the categorical feature of the facies model. The ensemble of realizations updated with LM-EnRML is used to approximate the likelihood of the model variables given data, and bivariate transition probability functions are used to represent the joint probability of the prior facies model. At the post-processing step, the facies type at each gridblock is determined sequentially to maximize the posterior probability, given the approximate prior and likelihood. We demonstrate the approach by conditioning three binary-facies models with channel structure and a three-facies model of sand dunes to nonlinear observations. Our results show the updated facies models honor production data very well, and the transitions among facies are consistent with the prior model.
Inequalities and Means from a Cyclic Differential Equation
Authors: Herzog Gerd , Kunstmann Peer Chr. 
Published: June 2014

Abstract
We prove that the solution of the cyclic initial value problem u’k = 1/2 - uk/(uk+1 + uk+2) (k Z/nZ), u(0)= x is convergent to an equilibrium μ (x) (1,…,1), and study the properties of the function x → μ(x) and its relation to Shapiro’s inequality.
Crossed Product of a C*-Algebra by a Semigroup of Interactions
Authors: Kwaśniewski B. K. 
Published: June 2014

Abstract
The paper presents a construction of the crossed product of a C*-algebra by a commutative semigroup of bounded positive linear maps generated by partial isometries. In particular, it generalizes Antonevich, Bakhtin, Lebedev’s crossed product by an endomorphism, and is related to Exel’s interactions. One of the main goals is the Isomorphism Theorem established in the case of actions by endomorphisms.
Viscosity Approximation Methods for Nonexpansive Multi-Valued Nonself Mappings and Equilibrium Problems
Authors: Cholamjiak P. , Cholamjiak W. , Suantai S. 
Published: June 2014

Abstract
In this paper, strong convergence theorems by the viscosity approximation method for nonexpansive multi-valued nonself mappings and equilibrium problems are established under some suitable conditions in a Hilbert space. The obtained results extend and improve the corresponding results existed in the literature.
Common Fixed Point of Four Mappings Satisfying Implicit Generalized Weak Contractive Type Condition
Authors: Sedghi Shaban , Shobe Nabi , Abbas Mujahid 
Published: June 2014

Abstract
In this paper, common fixed point for four maps using an implicit contractive condition in a complete metric space is proved. Some periodic point results for such mappings are also obtained. These results extend and generalize several comparable results in the current literature.
Extended Weyl-Type Theorems for Direct Sums
Authors: Berkani M. , Kachad M. , Zariouh H. 
Published: June 2014

Abstract
In this paper, we study the stability of extended Weyl and Browdertype theorems for orthogonal direct sum S⊕T, where S and T are bounded linear operators acting on Banach space. Two counterexamples shows that property (ab), in general, is not preserved under direct sum. Nonetheless, and under the assumptions that Π0
α (T) ⊂σα(S) and Π0
α(S) ⊂σα(T), we characterize preservation of property (ab) under direct sum S⊕T. Furthermore, we show that if S and T satisfy generalized a-Browder’s theorem, then S⊕T satisfies generalized a-Browder’s theorem if and only if σSBF-+ (S ⊕T) = σSBF
-
+(S) ∪σSBF-+(T), which improves a recent result of [13] by removing certain extra assumptions.
Some Applications of Minimal Pγ -Open Sets
Authors: Khalaf Alias B. , Ibrahim Hariwan Z. 
Published: June 2014

Abstract
We characterize minimal P γ-open sets in topological spaces. We show that any nonempty subset of a minimal P γ-open set is pre P-open. As an application of a theory of minimal Pγ-open sets, we obtain a sufficient condition for a P-locally finite space to be a pre P γ-Hausdorff space
Rδ-Supercontinuous Functions
Authors: Kohli J. K. , Tyagi B. K. , Singh D. , Aggarwal Jeetendra 
Published: June 2014

Abstract
A new class of functions called ‘Rδ-supercontinuous functions’ is introduced. Their basic properties are studied and their place in the hierarchy of strong variants of continuity which already exist in the literature is elaborated. The class of Rδ-supercontinuous functions (Math. Bohem., to appear) properly contains the class of Rz-supercontinuous functions which in its turn properly contains the class of Rcl- supercontinuous functions (Demonstratio Math. 46(1) (2013), 229-244) and so includes all Rcl-supercontinuous (≡clopen continuous) functions (Applied Gen. Topol. 8(2) (2007), 293-300; Indian J. Pure Appl. Math. 14(6) (1983), 767-772) and is properly contained in the class of R-supercontinuous functions (Demonstratio Math. 43(3) (2010), 703-723).
Merkel's Nachsommermärchen?
Authors: Langenbacher Eric 
Published: June 2014

Not once during the campaign—or actually over the whole course of theseventeenth Bundestag (2009-2013)—was it ever really in doubt that AngelaMerkel would continue as chancellor after the 22 September 2013 parliamentaryelection. Despite the vicissitudes of governing for eight years, mostin the midst of the financial and Euro crisis, she has achieved and sustainedsome of the highest approval ratings of any postwar German politician. Voterstrust Merkel as a good manager of the economy and an honest stewardand defender of German interests in Europe. Her carefully cultivated imageas a steady, reassuring, and incorruptible leader, coupled with her politicalacumen, ideological flexibility and, at times, ruthlessness—captured in thedueling monikers of Mutti Merkel and Merkelavelli1—are the keys to herprofound success.
Some causes of formation of colour during storage of hydrogen-peroxide bleached Norway spruce mechanical pulp
Authors: Enberg Sofia , Rundlöf Mats , Paulsson Magnus , Axelsson Patrik , Eriksen Øyvind , Engstrand Per 
Published: June 2014

Abstract
The discolouration of hydrogen-peroxide bleached Norway spruce mechanical pulp during storage in mill systems was studied and the contributions of process water, iron and dyes were evaluated over the visible spectrum. Washing of the pulp made it less sensitive to storage, possibly due to the removal of extractives, lignin-like substances, iron and pulp fines. Storage in white water gave extensive discolouration with a shoulder in the absorption spectrum at around 550- 650 nm. Most of the colour was associated with pulp fines or filler but some colour was also found in smaller fractions and in the water phase. The addition of ferric ions increased the light absorption coefficient during storage, initially at short wavelengths and then over the whole spectrum, but could not explain the increased absorption at 550-650 nm and could not be the only cause of the darkening in the mill system. A cationic basic violet dye gave a shoulder in the absorption spectrum similar to that in the mill system, but the absorption in this area did not increase during storage. Model calculations indicate that ferric ions together with violet and red dyes could explain a major part, but not all, of the colour observed in the mill system after storage. The darkening not accounted for at longer wavelengths and around 550-650 nm is suggested to be related to fines and fillers including dissolved and colloidal substances associated with these particles.
Radiation exposure of patients undergoing whole-body FDG-PET/CT examinations
Authors: Noßke D. , Leche U. , Brix G. 
Published: June 2014

SummaryAim: Reinvestigation of the radiation exposure of patients undergoing whole-body [18F]FDG-PET/CT examinations pursuant to the revised recommendations of the ICRP. Methods: Conversion coefficients for equivalent organ doses were determined for realistic anthropomorphic phantoms of reference persons. Based on these data, conversion coefficients for the effective dose were calculated using the revised tissue-weighting factors that account for the different radiation susceptibilities of organs and tissues, and the redefinition of the group ‘remainder tissues’. Results: Despite the markedly changed values of the equivalent organ doses estimated for FDG and of the tissue-weighting factors, the conversion coefficient for the effective dose resulting from FDG administration decreases only slightly by 10 %. For whole-body CT scans it remains even unchanged. Conclusion: The updated dose coefficients provide a valuable tool to easily assess the generic radiation risk of patients undergoing whole- body PET/CT (or PET/MRI) examinations and can be used, amongst others, for protocol optimization.
Seed source, seed traits, and frugivore habits: Implications for dispersal quality of two sympatric primates
Authors: Benítez‐Malvido Julieta , González‐Di Pierro Ana Ma. , Lombera Rafael , Guillén Susana , Estrada Alejandro 
Published: June 2014

•Premise of the study:Frugivore selection of fruits and treatment of seeds together with seed deposition site are crucial for the population dynamics of vertebrate‐dispersed plants. However, frugivore species may influence dispersal quality differently even when feeding on the same fruit species and, while animals disperse some seeds, others simply fall beneath the parent plant.•Methods:In southern Mexico, we investigated to see if within‐species seed traits (i.e., length, width, weight, and volume) and germination success differed according to seed source. For five tropical tree species we obtained ingested seeds from two sources, howler monkey (Alouatta pigra) and spider monkey (Ateles geoffroyi) feces; and noningested seeds from two sources, the ground and tree crowns (with predispersed seeds used as control).•Key results:A principal components’ analysis showed that traits of seeds ingested by howler monkeys differed from other sources while seeds ingested by spider monkeys were similar to noningested seeds. Howlers consumed on average the larger seeds inAmpelocera hottlei,Brosimum lactescens, andDialium guianense. Both primate species consumed the smaller seeds inSpondias mombin, while no seed trait differences among seed sources were found inSpondias radlkoferi. For all five tree species, germination rate was greatest for seeds ingested by howler monkeys.•Conclusions:For the studied plant species, seed ingestion by howler monkeys confers higher dispersal quality than ingestion by spider monkeys or nondispersal. Dispersal services of both primate species, however, are not redundant and may contribute to germination heterogeneity within plant populations in tropical forests.
PET reconstruction artifact can be minimized by using sinogram correction and filtered back-projection technique
Authors: Jha Ashish Kumar , Purandare Nilendu C , Shah Sneha , Agrawal Archi , Puranik Ameya D , Rangarajan Venkatesh 
Published: June 2014

AbstractFiltered Back-Projection (FBP) has become an outdated image reconstruction technique in new-generation positron emission tomography (PET)/computed tomography (CT) scanners. Iterative reconstruction used in all new-generation PET scanners is a much improved reconstruction technique. Though a well-calibrated PET system can only be used for clinical imaging in few situations like ours, when compromised PET scanner with one PET module bypassed was used for PET acquisition, FBP with sinogram correction proved to be a better reconstruction technique to minimize streak artifact present in the image reconstructed by the iterative technique.
Simultaneous PET/MRI: Impact on cancer management-A comprehensive review of cases
Authors: Jena Amarnath , Taneja Sangeeta , Jha Abhishek 
Published: June 2014

AbstractThe metabolic mapping of malignancy in whole body in a single examination by PET/CT has gained widespread acceptance where the CT provides an anatomical correlate for the PET. MRI offers advantage over CT in providing better anatomical information owing to its high soft tissue resolution especially in brain, liver, neck, pelvis and bone marrow. Simultaneous PET/MRI is a new multimodal imaging modality that is expected to improve the diagnostic performance of imaging wherein better anatomical and metabolic information can be acquired at the same time and space during a single examination time. Also, MR attributes like diffusion, perfusion and spectroscopy may further add to its diagnostic potential. In this article, we present our initial experience in illustrated cases done with simultaneous PET/MRI and outline its potential for several clinical applications in oncology.
An indigenous model for learning ultrasound-guided interventions
Authors: Khera Pushpinder S , Keshava Shyamkumar N 
Published: June 2014

AbstractUltrasound-guided interventions require good hand-eye coordination with respect to probe control and needle orientation. We describe a method of making an ultrasound phantom for practice purpose using an edible jelly mixture. The phantom is easy to make, reproducible, cheap, and simulates in vivo target.
Intercostal artery pseudoaneurysm complicating corrosive acid poisoning: Diagnosis with CT and treatment with transarterial embolisation
Authors: Chalapathi Rao MV Chalapathi , Rathi Abhishek A , Reddy Sharath P , Sahu Sambit 
Published: June 2014

AbstractPseudoaneurysms of intercostal artery are very rare. All the published cases have been caused by trauma, either iatrogenic or otherwise. They can cause hemothorax, retroperitoneal hemorrhage or can present as pulsatile chest mass. Doppler ultrasound, contrast-enhanced CT and conventional angiogram can accurately diagnose this condition. All the reported cases have been treated by embolisation, stenting or surgery. We report an unusual case of intercostal artery pseudoaneurysm arising as a complication of corrosive poisoning presenting with hematemesis and treated by glue embolisation. The authors believe this to be the first case of intercostal artery pseudoaneurysm that is non-traumatic, complicating corrosive poisoning and presenting with hematemesis.