bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nivel de conocimientos y factores críticos auto-percibidos en la enseñanza del diseño de prótesis parcial removible por alumnos del quinto año de Estomatología
Authors: Revoredo-De Rojas Arturo 
Published: March 2016

El propósito del estudio fue identificar los factores críticos en la enseñanza relacionados con el nivel de conocimientos de alumnos del quinto año de estudios en diseño de prótesis parcial removible (PPR) al final del internado clínico de la Facultad de Estomatología de la UPCH. Se evaluó a 61 alumnos de la promoción 2005 al término de sus rotaciones del internado clínico. A cada uno se le entregaron cuatro modelos de yeso paralelizados de cada clasificación de Kennedy para diseñarlos, además de un cuestionario que sirvió para identificar los factores críticos percibidos por los alumnos en su enseñanza de diseño de PPR. El análisis de los datos se realizó mediante la inspección visual de tablas de distribución de frecuencias y gráficos y el coeficiente de correlación parcial. Se encontró que sólo un bajo porcentaje de alumnos diseña PPR adecuadamente y que este porcentaje tiene variaciones de acuerdo a la clasificación de Kennedy. Los alumnos percibieron que este bajo nivel de conocimientos de diseño de PPR pudo deberse factores críticos como la enseñanza de laboratorio en PPR, el número de profesores para las prácticas de laboratorio, la enseñanza teórica sobre PPR y la enseñanza clínica de PPR. No se encontró correlación entre el nivel de conocimiento y los factores críticos auto-percibidos por los alumnos en la enseñanza de diseño de PPR, sin embargo los resultados pueden permitir superar las debilidades que presentan los sílabos en el área de prótesis parcial removible.
Prótesis dental en el paciente anciano: aspectos relevantes
Authors: Almeida Erika Oliveira de , Silva Eulália Maria Martins da , Falcón Antenucci Rosse Mary , Freitas Junior Amílcar Chagas 
Published: March 2016

Para el paciente anciano la prótesis dental es una integradora familiar, social, mantenedora de la salud general y elevadora de la expectativa de vida. Algunos cambios fisiológicos, patológicos y funcionales que ocurren con los elementos dentales en la tercera edad pueden repercutir en el tratamiento protésico. La siguiente revisión de literatura destaca los aspectos fundamentales que deben ser considerados en el tratamiento protésico de pacientes ancianos. Se destacan las particularidades de la prótesis parcial removible, prótesis total removible, prótesis parcial fija y prótesis sobre implante, así como las indicaciones de higiene oral. Se concluye que el cirujano dentista debe discutir con el paciente la mejor alternativa de tratamiento para cada caso específico y elegir aquella opción más adecuada a la capacidad de higiene bucal del paciente.
Oclusión en prótesis total
Authors: Hidalgo-López Ivonne , Vilcahuaman-Bernaola Jhonny 
Published: March 2016

La elección de un tipo de oclusión en la elaboración de prótesis dentales, es un paso crítico en el tratamiento del paciente edéntulo. De ella dependerá la capacidad masticatoria del paciente, su comodidad y la preservación de su hueso alveolar. Son muchos los factores que determinan el establecimiento de una correcta oclusión. No es sólo la colocación de los dientes artificiales para que encajen unos con otros, sino un procedimiento lógico, estudiado, que logra de alguna manerarestaurar la habilidad masticatoria, la estética, fonación y más aún, la preservación de los tejidos de soporte del paciente. De esta forma el odontólogo debe poseer un amplio conocimiento de la fisiología y anatomía humana, de los distintos materiales dentales, de prótesis oral específicamente (Prótesis Total) y tener una habilidad manual, para que el resultado final sea más que satisfactorio.Existen varías teorías de oclusión para pacientes edéntulos, como las que se citarán en el presente trabajo.
Gas/Oil Relative Permeability Normalization: Effects of Permeability, Wettability, and Interfacial Tension
Authors: Jahanbakhsh Amir , Shahverdi Hamidreza , Sohrabi Mehran 
Published: March 2016

Summary
Relative permeabilities (kr) are crucial flow functions governing the fluid distribution within and production from petroleum reservoirs under various oil-recovery methods. To obtain these important reservoir parameters, conventionally, it is required to take rock samples from the reservoir and perform appropriate laboratory measurements. Although kr is expressed as a function of fluid saturation, it is now well-known that kr values are affected by pore structure and distribution, absolute permeability, wettability, interfacial tension (IFT), and saturation history. These rock/fluid properties often change from one region of the reservoir to another, but it would be impossible to perform kr measurements for all regions of a reservoir. Generally, performing experiments on a core with higher permeability is faster and easier than a low-permeability rock. Therefore, assuming all other parameters such as wettability, IFT, and displacement direction are the same for two rocks with different permeabilities, the question becomes how do we estimate the kr of a rock with lower permeability from available (measured) kr of a higher-permeability rock? How do we account for wettability and IFT differences? A normalization technique has been proposed to remove the effect of irreducible water and trapped saturations, which would be different under different conditions. The relative permeabilities can then be denormalized and assigned to different regions (rock types) of the reservoir on the basis of their own irreducible water and trapped saturations.
The objective of this study is to introduce a methodology to predict the gas/oil kr for new rock/fluid conditions (such as permeability, wettability, and IFT) by use of existing gas/oil kr data measured at different conditions. By use of measured data from coreflood experiments, we show that by applying an appropriate normalization technique one can adequately predict kr of rocks with different permeability and wettability conditions in two-phase gas/oil flow. However, the results show that the effect of IFT change cannot be captured by normalization techniques. To improve the methodology, a new hypothesis is introduced and proposed here on the basis of dynamic trap saturation. Finally, by use of our experimental data, we evaluate the validity of the Coats (1980) IFT scaling method. We demonstrate the shortcomings of the method and offer an improvement to its prediction.
Analytical Treatment of Pressure-Transient Solutions for Gas Wells With Wellbore Storage and Skin Effects by the Green's Functions Method
Authors: Sousa Emilio P. , Barreto Abelardo B. , Peres Alvaro M. 
Published: March 2016

Summary
Even when written in terms of a pseudopressure function, the diffusivity equation for flow of gases through porous media is, rigorously speaking, nonlinear because the viscosity-compressibility product is pseudopressure-dependent. However, several techniques and analysis procedures neglect such nonlinearity. A new methodology for constructing solutions for gas reservoirs through the Green's functions (GF) technique was recently proposed in the literature. Such methodology handles the viscosity-compressibility product variation rigorously, and it was applied to solve several gas-well test problems successfully. However, wellbore storage and skin effects were not considered yet by this new approach.
In this work, the GF technique is applied to obtain a new solution for an infinite, homogeneous, isotropic gas reservoir being produced through a single vertical well represented by a line-source with wellbore storage and skin. The solution, however, does not consider non-Darcy flow effects. Even though the wellbore storage introduces a new nonlinearity to an already nonlinear problem, this work presents two accurate approximate solutions compared with the results from a commercial numerical well-testing simulator.
This work also shows that the wellbore pseudopressure dimensionless solution is a function of the correlating groups CDexp(2S) and tD/CD, exactly similar to the way that wellbore dimensionless liquid solutions are. Liquid and gas dimensionless solutions under these correlating groups are not equal, though.
A Highly Effective Corrosion Inhibitor by Use of Gemini Imidazoline
Authors: Yang Jiang , Gao Liyang , Liu Xuan , Qin Wenlong , Yin Chengxian , Zhang Juantao 
Published: March 2016

Summary
Corrosion inhibitors are widely used to control corrosion under the sweet and sour environments in the oil and gas industry. More effective and environmentally friendly corrosion inhibitors need to be developed. This paper studies a new gemini imidazoline (GIM) corrosion inhibitor, in which two hydrocarbon chains and two head groups are linked by a rigid spacer. The GIM was synthesized through the reaction of oleic acid with triethylene tetramine at 2:1 molar ratio. The performance of the GIM on inhibition of carbon dioxide (CO2) corrosion was evaluated by linear polarization resistance in sparged-beaker testing. Rotating-wheel testing was performed to evaluate the film persistency of the test inhibitors. The results showed that corrosion inhibition of the GIM was more effective at lower concentration than that of conventional imidazoline. The mixture of GIM and fatty acid also showed better film persistency than conventional imidazoline. The emulsion tendency of the GIM was less than that of conventional imidazoline. The mechanism of the highly effective GIM was studied. It showed that GIM has much-higher surface activity than conventional imidazoline. The critical micelle concentration (CMC) of GIM is several times lower than that of conventional imidazoline. Hence, the new GIM corrosion inhibitor and its mixture give more-effective corrosion inhibition at low concentration; there is also a lesser environmental effect.
Advanced Modeling of Interwell-Fracturing Interference: An Eagle Ford Shale-Oil Study
Authors: Marongiu-Porcu Matteo , Lee Donald , Shan Dan , Morales Adrian 
Published: March 2016

Summary
To investigate interwell interference in shale plays, a state-of-the-art modeling workflow was applied to a synthetic case on the basis of known Eagle Ford shale geophysics and completion/development practices. A multidisciplinary approach was successfully rationalized and implemented to capture 3D formation properties, hydraulic-fracture propagation and interaction with a discrete-fracture network (DFN), reservoir production/depletion, and evolution of magnitude and azimuth of in-situ stresses by use of a 3D finite-element model (FEM).
The integrated workflow begins with a geocellular model constructed by use of 3D seismic data, publicly available stratigraphic correlations from offset-vertical-pilot wells, and openhole-well-log data. The 3D seismic data were also used to characterize the spatial variability of natural-fracture intensity and orientation to build the DFN model. A recently developed complex fracture model was used to simulate the hydraulic-fracture network created with typical Eagle Ford pumping schedules. The initial production/depletion of the primary well was simulated by use of a state-of-the-art unstructured grid reservoir simulator and known Eagle Ford shale pressure/volume/temperature (PVT) data, relative permeability curves, and pressure-dependent fracture conductivity. The simulated 3D reservoir pressure field was then imported into a geomechanical FEM to determine the spatial/temporal evolution of magnitude and azimuth of the in-situ stresses.
Importing the simulated pressure field into the geomechanical model proved to be a critical step that revealed a significant coupling between the simulated depletion caused by the primary well and the morphology of the simulated fractures within the adjacent infill well. The modeling workflow can be used to assess the effect of interwell interferences that may occur in a shale field development, such as fracture hits on adjacent wells, sudden productivity losses, and dramatic pressure/rate declines. The workflow addresses the complex challenges in field-scale development of shale prospects, including infilling and refracturing programs.
The fundamental importance of this work is the ability to model pressure depletion and associated stress properties with respect to time (time between production of the primary well and fracturing of the infill well). The complex interaction between stress reduction, stress anisotropy, and stress reorientation with the DFN will determine whether newly created fractures propagate toward the parent well or deflect away. The technique should be implemented in general development strategies, including the optimization of infilling and refracturing programs, child well lateral spacing, and control of fracture propagation to minimize undesired fracture hits or other interferences.
A Quantitative Investigation of the Fracture Pump-ln/Flowback Test
Authors: Plahn S. V. , Nolte K. G. , Miska S. 
Published: March 2016

Abstract
Fracture closure pressure is an important parameter for fracture treatment design and evaluation. The pump-in/flowback (PIFB) test is frequently used to estimate its magnitude. The test is attractive because bottomhole pressures during flowback develop a distinct and repeatable signature. This is in contrast to the pump-in/shut-in test where strong indications of fracture closure are rarely seen. Various techniques exist for extracting closure pressure from the flowback pressure response. Unfortunately, these procedures give different estimates for closure pressure and their theoretical bases are not well established.
We present results that place the PIFB test on a more solid foundation. A numerical model is used to simulate the PIFB test and glean physical mechanisms contributing to the response. Based on our simulation results, we propose an interpretation procedure which gives better estimates for closure pressure than existing techniques.
Application of a novel sampling bailer device for the analysis of dissolved methane concentrations in municipal wastewater during and following anaerobic treatment
Authors: Beale David J. , Muster Tim H. , Low Jason , Trickey Mark 
Published: March 2016

Abstract
Modern wastewater utilities need to be able to measure and quantify the amount of methane from their treatment facilities in order to understand the potential energy that can be produced and the amount of methane being lost. This paper describes the application of a novel sampling bailer designed for the collection of wastewater samples that minimises methane losses. Samples collected during and following anaerobic treatment from a wastewater treatment plant using a novel sampling bailer were analysed using a previously optimised analytical method. Analysis of wastewater and anaerobic pond samples using current industry approaches resulted in dissolved methane concentrations ranging from 0.01 to 14.33 mg L−1. In comparison, the modified sampling protocol resulted in concentrations ranging from 0.08 to 18.73 mg L−1. The relative standard deviations (RSD%) of low level spikes (5.0 mg L−1 and 0.1 mg L−1 methane; n = 5) were found to be 2.3 and 10.3, respectively. Statistical analysis of the dissolved methane concentrations using the two different approaches demonstrated a significant difference in the recovered dissolved methane concentrations, indicating there is a greater methane recovery potential in wastewater treatment plants than previously realised, when collected using the novel sampling bailer and analysed following the optimised analytical protocol.
Walking Threads: A Memory and a Reflective Speculation Inspired by Gilles Deleuze and Fèlix Guattari
Authors: Schultis Brian 
Published: March 2016

In this short piece, Brian Schultis reflects on an experience of walking carrying a gold thread with four others in Aberdeen in Spring, 2014. Schultis first remembers the experience and then speculates at a possible theoretical interpretation. Following Gilles Deleuze and Felix Guattari, he describes the event becoming a component of a haecceity, and suggests that the embodied memory of such and individuation may be a way of thinking about intimacy.
Accounting Automation and Insight at the Speed of Thought
Authors: Drum Dawna M. , Pulvermacher Andrew 
Published: March 2016

ABSTRACT
Modern organizations are inundated with data, and they often struggle to organize it in an efficient and effective manner in order to get the most value from the data. The context of this case is, thus, situated in current business practice. Students are given large data files that were extracted from an enterprise system. They must use Microsoft Access and Excel to summarize and organize the data to create a dynamic profit and loss statement. Basic skills in Excel and general accounting knowledge are assumed, while Access knowledge is not assumed. The Teaching Notes provide solutions and are organized to allow instructors to provide minimal guidance or fully annotated directions.
Evaluation of mandibular volume classified by vertical skeletal dimensions with cone-beam computed tomography
Authors: Nakawaki Takatoshi , Yamaguchi Tetsutaro , Tomita Daisuke , Hikita Yu , Adel Mohamed , Katayama Koshu , Maki Koutaro 
Published: March 2016

ABSTRACT
Objective: To investigate the relationship between anteroposterior and vertical differences in maxillofacial morphology and mandibular volume.
Materials and Methods: Subjects comprised 213 Japanese adults (84 males and 129 females) who were divided into three groups based on mandibular basal arch (ANB) and Wits, measured in a cephalometric analysis: Class I (−1° ≤ ANB &lt; 4°,−1 mm ≤ Wits &lt; 0 mm), Class II (ANB ≥ 4°, Wits ≥ 0), and Class III (ANB &lt;−1°, Wits &lt;−1 mm). Subjects were also divided into three groups based on the mandibular plane angle (Mp), as follows: hypodivergent (Mp &lt; 23°), normodivergent (Mp  =  23–30°), and hyperdivergent (Mp &gt; 30°) groups. Mandibular volume was measured from cone-beam computed tomographic images that were analyzed using Analyze™ image processing software and compared among the three groups in each classification.
Results: No significant differences were noted in mandibular volume among Classes I, II, and III. An inverse relationship was found between mandibular volume and Mp, and a significant difference was noted in mandibular volume between the hypodivergent and hyperdivergent groups.
Conclusions: In addition to two-dimensional analysis, such as lateral cephalometry, three-dimensional information such as volume, provided by cone-beam computed tomography, contributes to a more detailed assessment of maxillofacial morphology.
Long-term Benefits of Intensive Glucose Control for Preventing End-Stage Kidney Disease: ADVANCE-ON
Authors: Wong Muh Geot , Perkovic Vlado , Chalmers John , Woodward Mark , Li Qiang , Cooper Mark E. , Hamet Pavel , Harrap Stephen , Heller Simon , MacMahon Stephen , Mancia Giuseppe , Marre Michel , Matthews David , Neal Bruce , Poulter Neil , Rodgers Anthony , Williams Bryan , Zoungas Sophia 
Published: March 2016

OBJECTIVE
The Action in Diabetes and Vascular Disease: Preterax and Diamicron MR Controlled Evaluation (ADVANCE) trial reported that intensive glucose control prevents end-stage kidney disease (ESKD) in patients with type 2 diabetes, but uncertainty about the balance between risks and benefits exists. Here, we examine the long-term effects of intensive glucose control on risk of ESKD and other outcomes.

RESEARCH DESIGN AND METHODS
Survivors, previously randomized to intensive or standard glucose control, were invited to participate in post-trial follow-up. ESKD, defined as the need for dialysis or kidney transplantation, or death due to kidney disease, was documented overall and by baseline CKD stage, along with hypoglycemic episodes, major cardiovascular events, and death from other causes.

RESULTS
A total of 8,494 ADVANCE participants were followed for a median of 5.4 additional years. In-trial HbA1c differences disappeared by the first post-trial visit. The in-trial reductions in the risk of ESKD (7 vs. 20 events, hazard ratio [HR] 0.35, P = 0.02) persisted after 9.9 years of overall follow-up (29 vs. 53 events, HR 0.54, P &lt; 0.01). These effects were greater in earlier-stage CKD (P = 0.04) and at lower baseline systolic blood pressure levels (P = 0.01). The effects of glucose lowering on the risks of death, cardiovascular death, or major cardiovascular events did not differ by levels of kidney function (P &gt; 0.26).

CONCLUSIONS
Intensive glucose control was associated with a long-term reduction in ESKD, without evidence of any increased risk of cardiovascular events or death. These benefits were greater with preserved kidney function and with well-controlled blood pressure.
Economics of Alternate Wetting and Drying Method of Irrigation: Evidences from Farm Level Study
Authors: Alam M Shahe , Islam MS , Salam MA , Islam MA 
Published: March 2016

Rice farmers investment on irrigation alone accounts the lion's share of total production cost. Alternate wetting & drying (AWD) method has emerged as a new technique of irrigation in Bangladesh as water saving irrigation technique. A study was undertaken with a view to verify the differences in water delivery, energy consumption and the relative economics of AWD method and conventional irrigation practice. Data were generated through sample survey in three production environments namely Kustia, Rangpur and Feni where field experiments were conducted to validate the AWD method. Data were generated using pre-designed questionnaire. Mainly descriptive statistics and partial budgeting technique were used in analyzing the data. The analysis revealed that on an average, the sample plots under AWD method required about 30% less water in growing MV Boro rice in all the study areas compared to conventional irrigation of maintaining continuous ponding water. The use of less irrigation was associated with the reduction of irrigation cost by 12 to 15% implying a clear advantage of AWD irrigation to the resource poor farmers. Almost 80% of the sample farmers in Kustia and Rangpur opined that the use of AWD method would also be conducive to increase MV Boro yield to some extent. Partial budget analysis further implied that use of AWD method would render an eventual profit of Tk 4224/ha for adopting the newly emerged irrigation technique instead of using the conventional irrigation.
Study on Arsenic Contamination in Soil and Water in Five-selected Agro Ecological Zone (AEZ) of Bangladesh
Authors: Mamun Md Nurul Huda-Al 
Published: March 2016

A research was carried out at the five different Agro-Ecological Zones (AEZ) of Bangladesh, viz. Tista Meander Floodplain (FP), High Ganges FP, Low Ganges FP, Active Ganges FP and Gopalganj-Khulna Bills during January 2001 to January 2002. The objectives were to assess the arsenic (As) concentration in the soil and water as well as to test tube well water samples and examines whether these exceed the acceptable limit of As. Water of shallow tube wells (STW) and soil samples were collected from ten sites under five AEZs of Bangladesh. Considerable number of water samples showed high contents of arsenic, which ranged from 0.032 to 203.9 ?g/l. Out of 428 water samples, 155 were found unsafe (>10-<50 ?g/l) and 78 were toxic (>50 ?g/l) for drinking purpose. However, out of 2648 soil samples collected from different Upazilas, only 4 samples collected from Chargat showed toxic level (>20 ?g/kg).