bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fibbin With Poems Across the Curriculum
Authors: Bintz William P. 
Published: February 2010

This article uses fibbin (Fibonacci poems) as an instructional strategy to teaching reading and writing across the curriculum. It describes fibbin from a historical and mathematical perspective and discusses it as an adaptation of the famous Fibonacci sequence to teaching content area material (e.g. science, math, and social studies). This instructional strategy is described and samples of student work that resulted from these strategies are presented and discussed. Variations to this strategy and lessons learned from the whole experience are included.تستخدم هذه المقالة فيبن (الأشعار الفيبنية) كإستراتيجية تعليمية لتعليم القراءة والكتابة عبر المنهاج الدراسي. لذا تصف فبين من منظر تاريخي ورياضياتي وتناقشه من حيث أنه متكيف من السلسلة الفيبينية المشهورة المتعلقة بتعليم مواد مجال المحتوى (على سبيل المثال العلوم والرياضيات والدراسات الاجتماعية). وقد تمت وصفة هذه الإستراتيجية التعليمية وباتالي تم تقديم نماذج أعمال الطلاب التي نتجت عن هذه الإستراتيجيات ونقاشها. وانضمت في هذه المقالة تنوعات هذه الإستراتيجية والدروس المأخوذة من التجربة بأكملها.本文使用fibbin (斐波那契数列式诗歌)作为教学策略，教授跨学科课程的阅读与写作。文章从历史及数学的角度介绍这种斐波那契数列式诗歌，并详述fibbin如何改编自著名的斐波那契数列，用以教授学科内容知识(例如科学科、数学科、社会科）。本文加以说明这教学策略，并介绍及讨论以这教学策略施教所得出的学生习作样本。文中亦讨论这策略的一些变异及作者从整个教学经验所得的启示。Cet article utilise les fibbin (poèmes de Fibonacci) comme stratégie pédagogique pour enseigner la lecture et l'écriture selon le programme. Il présente les fibbin dans une perspective historique et mathématique et en débat en tant qu'adaptation de la célèbre suite de Fibonacci pour enseigner un contenu pédagogique (sciences, maths, histoire et géographie par exemple). On décrit cette stratégie pédagogique puis on présente et discute des exemples de travaux d'étudiants résultant de cette stratégie. On inclut des variantes de cette stratégie et on tire des leçons de l'expérience dans son ensemble.В статье описано, как применять “фибин” – стихотворение, построенное на числах Фибоначчи или, иными словами, на золотом сечении, – при обучении чтению и письму в контексте различных предметов (естественнонаучного и общественно‐социального циклов). Фибин рассматривается с исторической и математической точек зрения; подробно – с примерами из работ школьников – разбирается его обучающий потенциал. В статье также представлены разновидности предложенного метода и выводы, к которым авторы пришли после его применения на практике.Este artículo usa poemas de Fibonacci como una estrategia para enseñar a escribir en todas las materias. Describe el proceso desde perspectivas históricas y matemáticas, y lo presenta como una adaptación de la famosa secuencia Fibonacci para enseñar materias de contenido (por ejemplo, las ciencias, la matemática y las ciencias sociales). Se describe esta estrategia y se dan y discuten muestras de lo que hicieron los estudiantes. Se incluyen variaciones de esta estrategia y las lecciones aprendidas.
Offshore Automated Managed Pressure Drilling in Fractured Basement Granite Reservoir: Case study, Challenges and Solutions
Authors: Chakraborty Biswajit , Meghnani Manoj , Saravanakumar M. , Gupta Rashmi Priya , Chawla Deepanshu , Shaikh Abdul Mujeer , Boyce Graham R. 
Published: February 2010

Abstract
A2 well is a development well in a gas field discovered in the 1980s. This field is located in the offshore part of Southeast India. Prior to A2, the wells drilled in this field were tested with a significant sweet gas in the basement reservoir. The basement reservoir consists of a fractured granite formation with an estimated pore pressure of 9.22 ppg. Due to the presence of natural fractures in the reservoir, Automated Managed Pressure Drilling (MPD) technology was used to minimize loss of circulation and prevent substantial formation damage.
Automated managed pressure drilling technology is used to help manage bottomhole pressure (BHP) precisely between narrow margins of pore pressure and fracture gradient by the application of back pressure on the annulus at all times. The system is automated by the use of a realtime hydraulics model, which takes into account the realtime parameters and calculates the required back pressure to maintain bottomhole pressure during drilling, connections, tripping, and well control situations.
The paper describes the case study of the A2 well where automated MPD technology was used to safely drill the entire 8½-in. hole lateral section, which was difficult to support, and minimized any well control or drilling problems. The results show how MPD technology helped in delivering a successful well by eliminating drilling problems and controlling the flow rate of hydrocarbons to the surface while drilling, tripping and running the completion.
Finding Gas Using Underbalanced Drilling in a Tight Reservoir
Authors: Bowling John , Hazarika Raju , Skaloud Dieter 
Published: February 2010

Abstract
Deep Gas exploration wells in the Fahud Salt Basin located in North Oman were traditionally drilled with high mud weights. Due to this conventional drilling practice in low permeability reservoirs and inherent petrophysical measurement and sampling limitations, a high level of uncertainty remained as to the presence of producible (or commercial) gas. This resulted in an increased risk when the decision to complete, hydraulically fracture and production test was taken – or conversely, the well was abandoned. Often, even test results proved inconclusive, with a strong suspicion of impaired reservoir obscuring the true production potential. The well discussed here was the 12th well that penetrated a tight Paleozoic reservoir in the Fahud Salt Basin and stepped away from this work flow due to the high cost and low success rate for the previous 11 wells. Of the previous 11 wells, one well tested economic gas flow, four were marginally economic and 6 ultimately deemed inconclusive. In this well, the primary objective of the vertical pilot hole was to unambiguously identify mobile hydrocarbons. UBD was selected as the key technology to meet this goal. Once the objective was achieved in the pilot hole, the budget for drilling a lateral hole, with the aim to optimize production, could be more confidently released.
To drill this well underbalanced, by reducing the mud weight from 16 kPa/m to 10.1 kPa/m well site water, PDO management had to change their well control mindset and take on the risk of major borehole breakouts and stuck pipe. The result of confronting these two major risks was manageable well control and a largely in-gauge well bore, allowing high quality wireline logs in the pilot hole and LWD logs in the lateral section. Most importantly, the flow measured while drilling and during a short UBD production and build-up test in this well was the most direct and unequivocal reservoir evaluation available in any of the tight gas wells of North Oman. The technical success of this exploration project resulted in the planning of eight more underbalanced exploration wells on neighbouring prospects, some of them with even deeper reservoirs and more pressure uncertainties.
Understanding Multiphase Flow Modeling for N2 Concentric Nitrogen Injection Through Downhole Pressure Sensor Data Measurements While Drilling MPD Wells.
Authors: Beltran Juan C. , Lupo Corrado , Medina Leiro , Duno Hermogenes , Gallo Fernando , Tang Jose , Rojas Jimmy , Rodríguez Efraín , Melgares Hernán , Bedoya Jorge , Puerto Gustavo 
Published: February 2010

Abstract
Hydraulic modeling is a fundamental piece of any Managed Pressure Drilling operation using multiphase gasified drilling fluids. MPD Engineers rely on hydraulic flow modeling systems to predict equivalent circulating densities. Models also allow designing and manipulating hydraulic parameters such as gas/liquid ratios, pressures and flow rates to achieve desired conditions.
Therefore, the selection and calibration of the correct hydraulic model is critical for the success of any MPD Operation. The ECD calculation in an MPD operation is not the solely objective of using a complex modeling system. Today’s downhole drilling tools technology makes available a variety of sensors capable of measuring actual downhole pressure values. Prediction of flow behavior is also an important step that will increase the ability of monitoring and keeping efficient hole cleaning, cutting transport and heat transfer efficiency, which are critical for all multiphase drilling operations. Actual measurement of downhole equivalent circulating density becomes now a critical new calibration value to compare hydraulic models performance and approximation to reality.
This paper compares the two-phase hydraulic simulations results with the data gathered from a drillstring installed annular pressure sensor used while drilling a highly deviated well in a low pressure reservoir using nitrogen injection through concentric string technique in an MPD operation. This technique poses a series of new challenges for the MPD engineer that needs to predict hydraulic behavior created by the typical transient “U” tube effect caused by connections, trips and surveys in this kind of applications.
The paper details the model and calibration process, findings and best practices gathered from multiple runs, real time transmission and high definition memory data. Actual results and conclusions and also discussed and analyzed in depth for the benefit of any further concentric job applications associated with use of downhole pressure sensors.
Experiences from use of a Managed Pressure Drilling & ECD Management System during drilling of a challenging HPHT well
Authors: Rommetveit Rolv , Ødegård Sven Inge , Nordstrand Christine , Bjørkevoll Knut S. , Fjeldheim Mikkel , Håvardstein Stein T. 
Published: February 2010

AbstractA very challenging HPHT well has been drilled utilizing a Managed Pressure Drilling System comprised of an advanced ECD Management System with automatic decision support, and real time simulations using state-of-the art models. The System uses all available real time drilling data (surface and downhole) in combination with real time modelling to monitor and optimize the drilling process. Especially the dynamic well pressure and the allowable drilling window (pore / fracture pressures and well stability limits) are focused on. The information is used to visualize the wellbore in 3D in real time. It has been implemented in Total E&P Norge TASC (Total Activities Support and Collaboration) Center in Norway.The system is composed of the following elements: An advanced and fast integrated wellbore flow and thermal simulator modeling the thermohydraulics effects dynamically, and also the interaction between flow and temperature effects in real time.Automatic quality check and corrections of drilling data; making them suitable for processing by computer modelsReal time supervision of the drilling window using time based drilling data as well as drilling modelsDiagnostics of the drilling state and conditions. This is obtained from comparing model predictions with measured data.Automatic forward looking of the ECDA Virtual Wellbore, with advanced visualization of the downhole process.Data flow and computer infrastructureAmong the challenges during planning and drilling of this well have been: Very small window between pore and fracture pressure. RT ECD simulations were performed with an advanced hydraulic and thermal wellbore model, and automatic supervision of the margins versus pore and fracture limits was performed.Increased probability for instabilities in the tight window. Was mitigated by RT stability modeling during drilling.Uncertainties in pore pressure predictions. Was mitigated by updating predictions during drilling.Experiences from the drilling as well as use of the MPD System will be summarized and presented. The supervision and diagnosis functionalities have been useful in particular.
Flow Properties of Super Light Weight Completion Fluid for Perforation Cleanup During Underbalance Condition
Authors: Khalil Munawar , Jan Badrul Mohamed , Raman Abdul Aziz 
Published: February 2010

Abstract
In cased holes wells, perforation tunnels are the only passage for fluid flow from reservoir to the wellbore. By establishing a clean connection during perforation job, optimum well productivity could be achieved. However, perforation-induced formation damage is always observed along and around the perforation tunnel as the result of perforation. One of the best alternatives to avoid this damage is with the application of underbalanced perforation. During the last decades, such techniques have been developed to achieve underbalance condition prior to gun detonation. As an alternative to these techniques, novel completion fluid referred as super light weight completion fluid is formulated. The use of super light completion fluid shows that underbalance condition could be achieved easily without additional works, major cost, and special surface equipment. In other words, no new procedures and equipment are needed to handle the super light weight completion fluids. Field test based on the basic laboratory formulation showed that the application of the super light weight completion fluid in underbalanced perforation has markedly increased the hydrocarbon production. This paper presents the investigation of flow properties and its effect to the temperature of super light weight completion fluid. The experimental data were fitted to six different rheological models, namely Newtonian, Bingham, Casson, Ostwald-De-Weale, Herschel-Bulkley, and Mizhari-Berk. The results indicated that fluid rheological data is best represented by Mizhari-Berk model. On the other hand, the dependency of the fluid on temperature could be described by Arrhenius model since the calculated R-square was relatively high. The calculated activation energy value of the super light weight completion fluid is 3.5533 kcal·mol−1; indicating that the temperature is not significantly affecting the fluid properties.
MPD Candidate Identification: To MPD or Not To MPD
Authors: Nauduri Sagar , Medley George H. , Schubert Jerome J. 
Published: February 2010

AbstractThe entire range of Managed Pressure Drilling (MPD) applications (Traditional, Advanced, and Expanded) has continued to progress in the last few years, thanks to technological advances in equipment, software, and processes, along with changes in approach to solve complex drilling problems. Even though the term “MPD” was first coined in 2003, several of its variations have been tested and used in the industry for a very long period of time, dating back to as early as the 19th century. Until now, several MPD wells have been drilled for purposes and objectives ranging from ‘fighting narrow pressure windows’ to ‘pore-pressure prediction’, more so in the last decade.However, the big question for any upcoming project always remains: “to MPD or not to MPD”. Even with all the advances in science and technology and increased availability of equipment and expertise, the industry still lacks a Candidate Identification Mechanism (CIM)/Candidate Selection Model (CSM) that is exclusively developed for MPD and its applications, and considers the engineering and economic aspects of the given project.A new MPD CIM described in this paper provides a basic tool that takes into consideration the available engineering data and determines if MPD is a solution for the given project/field/well. This MPD CIM is a result of constant interaction between the petroleum industry and the Petroleum Engineering research program at Texas A&M University (TAMU). The candidate selection model and software, which comprehensively explain the MPD CIM, are supported by an MPD wells database and the TAMU research thesis.
UBD or MPD: An Engineering Choice Based on Intent
Authors: Malloy Kenneth P. , Shayegi Sara 
Published: February 2010

Abstract
Often times reservoir and drilling engineers are faced with the decision on how best to construct a well to exploit zones of interest while seeking to avoid drilling problems that contribute to reservoir damage or cause loss of hole. The decision to pursue either Underbalanced Drilling (UBD) or Managed Pressure Drilling (MPD) operations is based on the intent of applying the most appropriate technology for the candidate well and entails either an acceptance of influx to the surface or avoidance of influx into the wellbore. Although there are some similarities in equipment utilization, it is a mistake to equate the two technologies as being the same. The merits of each technology will be described to aid in the decision-making process.
Simple Pricing Schemes for Pollution Control under Asymmetric Information
Authors: Kennedy Peter W , Laplante Benoit , Whittington Dale 
Published: February 2010

Abstract
Most policies for pricing pollution under asymmetric information proposed in the literature to date are rarely  if ever  used in practice. This is likely due to their complexity. We investigate the scope for using somewhat simpler policies that are more closely related to pricing schemes already used by regulators in many jurisdictions. These schemes have a discrete block pricing (DBP) structure whereby a given unit price for pollution is applied up to a specified level of pollution for any given polluter, and a higher unit price is applied to any pollution from that polluter above the specified level. If the same price schedule is applied uniformly to all firms, we call it UDBP. We derive the optimal UDBP schedule for any given number of price blocks. We also derive the optimal limiting case of the UDBP schedule (with an infinite number of price blocks) as a uniform linear increasing marginal price schedule (ULIMP). The optimal ULIMP scheme strikes a balance between the information-related benefits of increasing marginal prices on one hand, and an increase in aggregate abatement cost, due to the non-equalization of marginal abatement costs across firms, on the other. In particular, the optimal schedule is steeper with larger aggregate uncertainty about marginal abatement costs, and flatter with more observable heterogeneity across firms. We then compare our price schemes with those proposed by Weitzman (1978) and Roberts and Spence (1976).
Work‐related injuries among Hispanic construction workers—Evidence from the Medical Expenditure Panel Survey
Authors: Dong Xiuwen Sue , Men Yurong , Ringen Knut 
Published: February 2010

AbstractBackgroundAlthough a large number of Hispanic workers have entered the construction industry, few studies have estimated non‐fatal work‐related injuries for Hispanic construction workers at a national level. This study examines work‐related injury conditions among Hispanic construction workers and assesses disparities between Hispanic and white, non‐Hispanic workers.MethodsPooled data were analyzed from a large national population survey, the Medical Expenditure Panel Survey (MEPS), between 1996 and 2002. More than 7,000 construction workers were identified from the MEPS data including 1,833 Hispanic workers and 4,533 white, non‐Hispanic workers. Univariate and multivariate analyses were conducted using SAS‐callable SUDAAN.ResultsHispanic workers differ from white, non‐Hispanic workers in demographic and socioeconomic status. After controlling for major risk factors, Hispanic construction workers were more likely than their white, non‐Hispanic counterparts to suffer non‐fatal work‐related injury conditions (OR = 1.28, 95% CI: 1.00–1.64).ConclusionsThis study provides important evidence concerning Hispanic workers' safety on construction sites. Enhanced safety and health programs for Hispanic construction workers and improved occupational injury data systems are recommended. Am. J. Ind. Med. 53: 561–569, 2010. © 2010 Wiley‐Liss, Inc.
Lung cancer risk associated with occupational exposure to nickel, chromium VI, and cadmium in two population‐based case–control studies in Montreal
Authors: Beveridge Rachelle , Pintos Javier , Parent Marie‐Élise , Asselin Jérome , Siemiatycki Jack 
Published: February 2010

AbstractBackgroundNickel, chromium VI, and cadmium have been identified as lung carcinogens in highly exposed cohorts. The purpose of this study was to examine the etiological link between lung cancer and these metals in occupations, that usually entail lower levels of exposure than those seen in historical cohorts.MethodsTwo population‐based case–control studies were conducted in Montreal, from 1979 to 1986 and from 1996 to 2001, comprising 1,598 cases and 1,965 controls. A detailed job history was obtained to evaluate lifetime occupational exposure to many agents, including nickel, chromium VI, and cadmium compounds.ResultsLung cancer odds ratios were increased only among former or non‐smokers: 2.5 (95% CI: 1.3–4.7) for nickel exposure, 2.4 (95% CI: 1.2–4.8) for chromium VI, and 4.7 (95% CI: 1.5–14.3) for cadmium. The metals did not increase risk among smokers.ConclusionsWhile excess risks due to these metal compounds were barely discernable among smokers, carcinogenic effects were seen among non‐smokers. Am. J. Ind. Med. 53:476–485, 2010. © 2010 Wiley‐Liss, Inc.
Carbon Nanomaterials in Biosensors: Should You Use Nanotubes or Graphene?
Authors: Yang Wenrong , Ratinac Kyle R. , Ringer Simon P. , Thordarson Pall , Gooding J. Justin , Braet Filip 
Published: February 2010

AbstractFrom diagnosis of life‐threatening diseases to detection of biological agents in warfare or terrorist attacks, biosensors are becoming a critical part of modern life. Many recent biosensors have incorporated carbon nanotubes as sensing elements, while a growing body of work has begun to do the same with the emergent nanomaterial graphene, which is effectively an unrolled nanotube. With this widespread use of carbon nanomaterials in biosensors, it is timely to assess how this trend is contributing to the science and applications of biosensors. This Review explores these issues by presenting the latest advances in electrochemical, electrical, and optical biosensors that use carbon nanotubes and graphene, and critically compares the performance of the two carbon allotropes in this application. Ultimately, carbon nanomaterials, although still to meet key challenges in fabrication and handling, have a bright future as biosensors.
Synthesis and antimicrobial activities of sulfonohydrazide‐substituted 8‐hydroxyquinoline derivative and its oxinates
Authors: Dixit Ritu B. , Vanparia Satish F. , Patel Tarosh S. , Jagani Chandresh L. , Doshi Hiren V. , Dixit Bharat C. 
Published: February 2010

AbstractLooking at the pharmacological importance of 8‐hydroxyquinolines and sulfonamides, in the present study, a novel bi‐dentate ligand 4‐amino‐N′‐[(8‐hydroxyquinoline‐5‐yl)methyl] benzenesulfonohydrazide (AHQMBSH) having above both moieties within a single molecular framework was synthesized by the reaction ofN‐acetamidobenzene sulfonohydrazide with 5‐chloromethyl‐8‐hydroxyquinoline hydrochloride. Its metal(II) oxinates were also prepared with Mn(II), Fe(II), Co(II), Ni(II), Cu(II) and Zn(II) salts. All the above compounds were investigated by physicochemical analyses, thermogravimetric analysis and spectroscopic techniques. Antimicrobial activities for the above prepared compounds were carried out using the agar‐plate method against various strains of bacteria (Staphylococcus aureus, Bacillus subtillis, Pseudomonas aerugionsa, Escherichia coli) and fungi (Aspergillus nigerandAspergillus flavous). The results show a significant increase in antimicrobial and antifungal activities of AHQMBSH compared with the parent 8‐hydroxyquinoline and sulfonamides. Copyright © 2010 John Wiley & Sons, Ltd.