bluuebunny/crossref_metadata_2025 huggingface dataset:
The Relationship Between Smectite/ Illite Ratios and Diagenetic History of Sandstone Reservoir, Batu Ayau Formation, Upper Kutai Basin, East Kalimantan, Indonesia
Authors: Puji Astuti Tri Rani , Surjono Sugeng Sapto , Warmada I Wayan , Kusuma Didit Putra , Tsukada Yasumoto , Otake Tsubasa , Sato Tsutomu
Published: May 2016

The Middle – Late Eocene sandstones of Batu Ayau Formation have been examined for the potential as a reservoir based on subsurface data and outcrop samples taken along Ritan and Belayan's River. Petrographic study, XRD, SEM/EDS, porosity measurement, and quantitative determination of reservoir properties were carried out in this study. The sandstones are fine- to coarse-grained, moderately well to well sorted litharenite with subordinate lithic arkose, subarkose, sublitharenite and feldsphatic litharenite. The framework compositions of all sandstones are entirely quartz and plagioclase with trace amounts of K-feldspar and muscovite. The diagenetic processes include compaction, cementation, overgrowth of autigenic minerals (smectite), and dissolution due to alteration of feldspars. The SEM photomicrographs exhibit four types of cement such as mordenite, kaolinite, smectite and overgrowth quartz which are present over the entire samples. Quartz and kaolinite occur as pore-lining and pore-filling cements which locally developed as vermiform and accelerated the minor porosity loss due to pore-occlusion. Result of XRD analysis for the whole work are consistent with the qualitative result of petrographic analysis. Result of XRD analysis with ethylene glycol solvation for clay fraction (<2 µm) indicate a progressive alteration of smectite to illite. Based on the Watanabe's Diagram, the presence of smectite layers in interstratified illite/smectite continously decrease from 100% to 65% with increasing the burial depth. The result indicate that the paleotemperature for sandstone diagenesis around 60–90°C. This is interpreted to be the result of temperature controlled chemical compaction, i.e. transformation from smectite to illite, feldspar dissolution and quartz precipitation. The laboratory analysis as well as field data demonstrate the sandstones of Batu Ayau Formation were subjected to mesodiagenesis and result in good to tight ranges of porosity.
Using Seismic Attributes and Multiple-Point Statistics to Condition Facies Modelling of a Deepwater Turbidite Reservoir
Authors: Ronot Cyril , Ruelland Philippe
Published: May 2016

In the context of field appraisal in turbidite environment, with the excessive costs associated to deepwater drilling, well data is limited. High-quality 3D seismic data is a key driver for reservoir characterisation and modelling. Seismic volume attributes can be used to attempt a quantitative prediction of facies heterogeneities within the reservoirs. The present work develops a method for enhanced conditioning of geostatistical facies modelling to seismic attributes, thus combining techniques for a better representation of reservoir heterogeneities.

This methodology was developed on a deepwater turbidite field in conceptual phase of development. Only one well was drilled, and a seismic attribute cube of pseudo-Vclay (pseudo-volume of clay) is available. The main reservoir unit consists in a wide fairway containing erosive-constructive unitary stacked channels.

In classical approaches, sand proportions in the reservoir are derived from seismic attributes by calibration using well data. The idea behind the new method presented here is to calibrate the pseudo-volume of clay attribute to actual sand proportions using a training image, getting around the lack of extensive well data for calibration. The training image provides a conceptual target derived from sedimentological models for the statistical distribution of sand proportions in the reservoir. The outcome is a reservoir property of calibrated sand proportions that can be used as soft auxiliary data for facies modelling using multiple-point statistics.

Seven scenarios were designed to account for geological uncertainties, and multiple stochastic realizations were generated for each scenario. Connected oil volume inferred from well testing was used as the main controlling parameter for evaluating the resulting facies models. Scenarios considering high channel stacking and large channels came best at honouring dynamic data. Other scenarios with models presenting a connected volume too low in the fairway, if considered or proven realistic, puts into question the role of levees in the dynamic behaviour of the reservoir.

Introduction

In the context of field appraisal in deepwater turbidite environment, with the excessive costs associated to deepwater drilling, well data is limited. 3D seismic data of very good to excellent quality is a key driver for reservoir characterisation and picking geological bodies and architectures. These architectures are essential elements that in turn drive the facies and petrophysical modelling workflows.
Quantitative comparison of three spectral decomposition methods
Authors: Adams Donald C. , Markus David
Published: May 2016

Several time-frequency transform methods have been used for spectral decomposition of seismic data. Comparisons between methods have been largely qualitative with a focus on their relative time and frequency resolutions. Very little has been said about the fidelity of spectral decomposition results relative to the original data and the quantitative differences between methods. This paper provides some analysis of these issues as they relate to three decomposition methods, namely the S-transform (ST), Matching Pursuit (MP) and Empiric Mode Decomposition (EMD).

Our quantitative comparison made use of the following methods:Total energy of the trace vs. time-frequency transform – the ideal spectral decomposition will have total energy equal to the input signal.Marginal time and frequency conditions – the ideal spectral decomposition will satisfy the marginal conditions. The integral of the spectra over frequency will equal the instantaneous energy of the trace and the integral over time will equal the power spectra of the trace.

Our analysis used a combination of synthetic and acquired traces and wedge models. The single trace and wedge model results suggest that the characteristics of the spectral decomposition change with the type of time-frequency transform used in the decomposition.ST wedge model conformed to the bandlimited spike interference model with spacing dependent spectral notches. The single trace marginal conditions were satisfied best with a resolution ratio near 1.4 at the cost of a little time resolution relative to a default resolution ratio of 1.0.MP wedge model did not have spectral notches and is negatively influenced by the greediness and path dependence of the process. The single trace marginal condition details however are best satisfied by MP.EMD wedge model spectrum was very sparse with an apparent relationship between the frequency of the components and the degree of tuning. The single trace marginal conditions satisfaction is variable and dependent on the model traces having satisfied the underlying assumptions.

We recommend the use of marginal condition analysis in parameter selection for spectral decomposition and to facilitate better products for quantitative analysis.

Introduction

Several time-frequency transform methods have been applied under the guise of spectral decomposition for the interpretation of seismic reflection data. Some examples of these methods are the short window Fourier transform, continuous wavelet transform, S-transform, MP, empiric mode decomposition, and quadratic time-frequency distributions. In this study we focused on the quantitative comparison of three methods: the S-transform, MP and empiric mode decomposition. The algorithms used in this study have been extensively tested and adjusted by the authors to minimize distortion and maximize energy conservation with the addition of appropriate scales, and application of additional signal processing techniques, beyond those discussed in the references.
Downhole Monitoring of Multicluster, Multistage Horizontal Well Fracturing with Fiber Optic Distributed Acoustic Sensing (DAS) and Distributed Temperature Sensing (DTS)
Authors: Sookprasong P A , Hurt Robert S , Gill Cooper Chance
Published: May 2016

Fiber optic distributed temperature sensing (DTS) and distributed acoustic sensing (DAS) have been used to monitor and diagnose the integrity of wellbores (leak detection, gravel-pack screen damage, formation subsidence), the performance of reservoirs and wells (production profile, injection profile), used for surveillance and communication networks for quite some time. Though still somewhat novel, the application of high-resolution fiber optic DAS and DTS during multistage hydraulic fracturing has increased in recent years.

This paper shares DAS and DTS images of fracture initiation, fracture propagation and fracture progression during fracturing treatments of multicluster (each stage), multistage horizontal tight-gas well. The images illustrate the dynamics pertaining to initiation, propagation and arrest of hydraulic fractures during simultaneous stimulation of multiple clusters. First, fracture initiation appears not only during early time, as expected, but late time initiation events may develop in seemingly dormant clusters. Second, propagation of multiple fractures can occur randomly within a cluster array. Third, dominate clusters are often observed during stimulation. Further, during the treatment cycle, the position of dominate cluster(s), within a given stage, may actually change.

Introduction

Placing the fractures where intended along the horizontal wellbores effectively and efficiently in each frac stage is a challenge when developing low-permeability and/or unconventional reservoirs. The plug-and-perf completion process is thought to enable and dictate multiple and simultaneous fracture initiation and propagation. However, accurate and reliable measurements and detection of fracture placement are difficult to accomplish. Some diagnostic tools to detect and identify the locations of the fractures include radioactive and chemical tracer surveys, microseismic monitoring, fiber optic distributed temperature sensing (DTS), and fiber optic distributed acoustic sensing (DAS). Each technology has advantages and disadvantages. Many of these applications can be used for monitoring, interpretation and diagnostic in real-time (or quasi-real-time) during the fracturing process with various degrees of accuracy. Several of these technologies can also be leveraged for monitoring and diagnostics during flow-back/production. Comparison and correlation of the interpretation and diagnostics between these applications should give better insights of fracture initiation, propagation, and progression with time.
Risk Analysis for Uncertainties Management of Integrated Production Optimisation and Field Potential Evaluation
Authors: Scaramellini Sara , Viadana Giorgio , Di Sarra Andrea , Cerri Paolo , Pellegrini Simone , Bianco Amalia , Masi Silvia
Published: May 2016

Production optimization of hydrocarbon fields is a complex task, due to the high number of processes involved and their synergy. It is therefore challenging to manage an integrated production system, comprising the reservoir and the production wells, the gathering system, and the process plant. The optimization process is driven by input data subjected to uncertainties due to variability, observational errors, and lack of up-to-date measurements. As a consequence, the aforementioned uncertainties are carried out through the simulation process up to final results.

This work presents a workflow for oil & gas production optimization under uncertainties, that is structured in three phases. In the first phase, the integrated optimization process with powerful evolutionary algorithms takes place. The result is an optimized field configuration characterized by a deterministic production increase in respect to the initial production. After having identified the uncertain input variables in the optimization process, a Monte Carlo simulation for the optimized field configuration is performed. In this second phase, the input data are modelled through statistic distributions, and the obtained result is a probabilistic distribution of the production increase. The third step is a detailed analysis of the system constraints to evaluate the behaviour of the optimized configuration. In addition, a methodology to choose an alternative setting of the production field, that allows to increase the system reliability, is presented.

The integrated workflow has been applied on a case study. The results obtained show that is extremely important to identify and quantify the uncertainties involved in a hydrocarbon production system for the evaluation of its potential production, and to verify the compliance with its constraints. Applying a configuration when a high degree of uncertainty is present may be hazardous and unsafe.

The proposed workflow is an important tool to evaluate the field potential under uncertainties, optimize production, improve operations and system reliability, and support the decision-making process.

Introduction

Oil and gas production optimization is a field of extreme importance, since oil demand is continuously increasing, and many reservoirs currently in production are experiencing a decrease in production rates. The high number of processes involved and the synergy between them make the optimization of hydrocarbon fields a very complex task. It is therefore of primary importance to manage the challenges associated with an integrated production system, comprising the reservoir and the wells, the gathering system, and the process plant.

In order to holistically optimise the production system the proposed integrated approach aims to combine subsurface models, surface production and engineering models in a single asset management tool.
MPFM Accuracy Enhancements in a Scale Precipitation Environment: Lessons Learned and Guidelines
Authors: Nasri Ahcene , Al-Amri Meshal Ali , Al-Isawi Waleed Abd , Al-Kadem Mohammad S
Published: May 2016

Scale precipitation is a common phenomenon that is a result of chemical reactions that usually occur during hydrocarbon production. It is one of the most common challenges in the oil and gas industry, especially for remote offshore fields. Scale crystals usually cause production losses due to the deposition of scale on the subsurface and surface of equipment and will damage instruments, reduce functionality and increase measurement uncertainties. Deposition of scale influences the performance of multiphase flow meters (MPFM) based on electrical impedance and gamma ray density measurements.

Several oil wells of an offshore field located in Arabian Gulf, which commenced its production in 2013 from a heavy oil column lying above a large water aquifer, faced scale build up. The field has encountered a period of water injection prior to its production startup to ensure that reservoir pressure is maintained. The fluid flow rate tests of these wells are conducted through MPFMs.

This paper presents the work performed, remedial actions and procedures implemented to maintain MPFM's measurement accuracy in a precipitation environment. This paper will also address the methodology for detecting scale deposition using MPFM measurements compared to scale laboratory detection experiments and water geochemical analysis. The paper will recommend the lessons learned of cleanup operations guidelines for affected MPFMs for calibration purposes.
Airborne Gravity Gradiometry for Rapid Mapping of Hydrocarbon Exploration Plays
Authors: Christensen Asbjorn N , Moore David , Dransfield Mark Helm
Published: May 2016

Introduction

Over the past decade the Airborne Gravity Gradiometer (AGG) has been applied to a range of hydrocarbon exploration plays in settings from Australia to the Americas. Case study examples will illustrate that fixed-wing and helicopter borne AGG, when combined with high-resolution magnetics and available 2D seismic profiles, provide the means to rapidly, efficiently and safely explore for a variety of hydrocarbon exploration plays, including basement structural traps, salt structures and carbonate reefs.

The AGG technology

The Airborne Gravity Gradiometer (AGG) was designed and built explicitly for airborne use by the FALCON project (van Leeuwen, 2000) and called the FALCON AGG. Since 2005, this technology has used fully digital electronics. The digital AGG is smaller and lighter than other gravity gradiometers, permitting its installation in smaller aircraft, particularly helicopters.

Improved airborne gravity data quality

AGG provides twenty times better spatial resolution [150m versus 3,000m], and five times less noise [0.15 mGal versus 1.0 mGal] than conventional Airborne Gravity (Dransfield and Christensen, 2013). With the advent of a helicopter borne system AGG surveys can now be conducted as draped surveys in rugged terrain and at lower flight speed than by fixed wing aircraft, translating into additional improvement in the lateral resolution of the AGG data [45m].

Rapid AGG data acquisition

The AGG system has been designed specifically for use in light aircraft and demonstrates minimum sensitivity to air turbulence. The system can operate in turbulent conditions and routinely acquires in excess of 4,000 line-km per week. This translates into very rapid data acquisition, when contrasted to ground-based gravity acquisition. Fernandez et al. (2010) published an AGG case study from Argentina, Figure 1. A ground gravity survey of similar resolution (300m by 150m gravity station spacing) would require ~70,000 ground gravity station, or nearly two years of ground crew field work. In contrast the AGG survey was completed in two months with no safety incidents.
Rock characteristics of oil-, condensate- and dry gas-producing wells of the unconventional Devonian Duvernay Formation, Canada
Authors: J. Wust Raphael A. , Cui Albert , Nassichuk Brent R. , Bustin R. Marc
Published: May 2016

The Devonian strata of the Western Canada Sedimentary Basin has a wealth of potential hydrocarbon source rocks including the unconventional Upper Devonian Duvernay Formation of the Woodbend Group, a prolific oil-producing formation that has fed into the overlying strata. The Duvernay Formation has seen investments of over $7 billion since 2010 for land rights, corporate acquisitions/divestures and drilling activity. The Kaybob area is currently the center of exploration and production in the play with over 100 wells drilled or licensed. Notable operators include Athabasca, Encana, Talisman, Shell, Chevron, Conoco Phillips, Husky and Celtic/Exxon. One of the pioneering wells at Kaybob South (Celtic et al. HZ 15-33-60-20W5) tested 2.1 mmcf/d of gas with 75 bbls/mmcf of 56° API condensate at a reservoir pressure of 63 MPA (~19 KPa/m pressure gradient). Exploration companies are touting GIP reserves ranging wildly from 45 to >200 bcf/section. Despite the positive initial production numbers, the Kaybob area has a complex geological and stratigraphic framework that needs to be understood. Thermal maturity of the organic matter in the Duvernay Formation ranges from immature in the eastern portion of the basin to dry-gas window in the west. Hence, location of each well is key to optimizing the production potential. Here we present new rock property data of wells along a transect from the oil-prone to the dry gas-prone area in the Kaybob area and compare the properties with the existing hydrocarbon production information. Rock composition, fabric, organic matter content and maturity as well as amount, distribution and size of pores and pore networks are evaluated. The data is displayed in a stratigraphic context and current production zones are highlighted. The discussion also integrates the thermal history and possible tectonic overprints of the area to evaluate the potential of developing production through the various thermal maturity zones and the possible hydrocarbon storage/flow of these rocks.
Productivity and partial budget analysis in wheat-rice sequences as influenced by integrated plant nutrition system and legume crops inclusion
Authors: Hossain Md Shakhawat , Sarkar MAR , Jahiruddin M , Chaki AK , Khan ASM MR
Published: May 2016

The experiments were carried out at the Regional Wheat Research Centre, Rajshahi of Bangladesh Agricultural Research Institute (BARI) for two consecutive years, 2009-10 and 2010-11 to evaluate the agro-economic productivity of Wheat-Rice cropping sequence as influenced by integrated plant nutrition system (IPNS) and inclusion of legume crops. The experiment comprised of four cropping sequences viz. Wheat-Mungbean- T. Aman rice, Wheat-Blackgram- T. Aman rice, Wheat-Sesbania- T. Aman rice and Wheat- Fallow- T. Aman rice; and six nutrient treatments viz. 100% recommended nutrient rates, IPNS with 3 t ha-1 poultry manure (PM), IPNS with 6 t ha-1 PM, IPNS with 5 t ha-1 cowdung (CD), IPNS with 10 t ha-1 CD and farmers practice (FP). It was carried out in a split-plot design assigning cropping sequences in the main plots and nutrient treatments in the sub-plots with three replications. For the IPNS, the 100% nutrient rates were adjusted with manure and fertilizers. Inclusion of mungbean in the Wheat-Rice cropping sequence showed higher production cost but it gave higher system productivity, gross return, gross margin, benefitcost ratio and production efficiency. This cropping sequence gave on an average 57% higher wheat equivalent yield (WEY) compared to the existing Wheat-Rice sequence followed by blackgram included cropping sequence. The IPNS based fertilizer and manure application had better yield performance, WEY, gross margin, gross return, benefit-cost ratio, production efficiency and land use efficiency as compared to 100% chemical fertilizers or FP. It is concluded that the Wheat-Mungbean-Rice cropping sequence with IPNS approach is a productive and profitable technology for crop cultivation.Bangladesh J. Agril. Res. 41(1): 17-39, March 2016
Field performance of BARI urea super granule applicator
Authors: Hoque MA , Karim MR , Miah MS , Rahman MA , Rahman MM
Published: May 2016

Field performance of BARI Urea Super Granule (USG) applicator was evaluated on BARI research stations (Gazipur, Pabna, and Barisal) and farmers field (Pabna, Barisal, Magura,Narshingdi,Jhenadah, Sirajgang, Rajbari and Jhalkathi) during the boro season of 2012-13. The applicator was tested with four treatments- application of USG by hand (165 kg/ha), application of USG by BARI USG applicator (165 kg/ha), application of prilled urea at USG rate (165 kg/ha) and application of prilled urea at farmers practice. In the farmers field, USG applicators were evaluated with the traditional broadcasting of granular urea. Similar yield of rice was obtained from machine and hand application of USG in all locations. Higher yield of rice was obtained from USG than granular urea. During field test, average field capacity and efficiency of the applicator were 0.138 ha/h and 81%, respectively. Considering custom hiring, the net income per year was Tk. 71750 and the payback period was 3 days. The price of the applicator is Tk. 3500.Bangladesh J. Agril. Res. 41(1): 103-113, March 2016
From the Editors (English)
Authors: Namli Elena
Published: May 2016

No abstract available.
Little Potential of Spring Wheat Genotypes as a Strategy to Reduce Nitrogen Leaching in Central Europe
Authors: Herrera Juan , Noulas Christos , Stamp Peter , Pellet Didier
Published: May 2016

Nitrogen (N) losses negatively impact groundwater quality. Spring wheat genotypes varying in N-fertilizer recovery were studied (by using lysimeters) for their potential to minimize NO3-N leaching during spring and summer, over a three-year period. Additionally, we examined to what extent root growth and NO3-N leaching explain the well-known difference found between apparent and isotopic N recovery. The genotypes were grown under low (2 g m−2) and high (27 g m−2) N fertilizer supply. On average, the apparent and isotopic recoveries of N fertilizer by wheat were 43% and 51%, respectively. The three genotypes varied in fertilizer N recovery but not in NO3-N leaching, which only accounted for 15% of the applied N fertilizer. The differences in N uptake, fertilizer N recovery and root growth among the genotypes were not associated with the leached NO3-N because root growth and N uptake were not well synchronized with NO3-N leaching. Already at stem elongation 70% to 98% of the season-long NO3-N leaching had already taken place. Thus, the ability to minimize in-season NO3-N leaching by using spring wheat genotypes with higher fertilizer N recovery was limited because maximum N leaching occurred in the early crop season.
A Novel Image Alignment Algorithm Based on Rotation-Discriminating Ring-Shifted Projection for Automatic Optical Inspection
Authors: Chen Chin-Sheng , Huang Chien-Liang
Published: May 2016

This paper proposes a novel image alignment algorithm based on rotation-discriminating ring-shifted projection for automatic optical inspection. This new algorithm not only identifies the location of the template image within an inspection image but also provides precise rotation information during the template-matching process by using a novel rotation estimation scheme, the so-called ring-shifted technique. We use a two stage framework with an image pyramid searching technique for realizing the proposed image alignment algorithm; in the first stage, the similarity based on hybrid projection transformation with the image pyramid searching technique is employed for quick selection and location of the candidates in the inspection image. In the second stage, the rotation angle of the object is estimated by a novel ring-shifted technique. The estimation is performed only for the most likely candidate which is the one having the highest similarity in the first stage. The experimental results show that the proposed method provides accurate estimation for template matching with arbitrary rotations and is applicable in various environmental conditions.
Cloning, Expression and Characterization of a Novel Fructosyltransferase from Aspergillus oryzae ZZ-01 for the Synthesis of Sucrose 6-Acetate
Authors: Wei Tao , Huang Shen , Zang Jie , Jia Chunxiao , Mao Duobin
Published: May 2016

A 1521 bp gene encoding for a novel fructosyltransferase from Aspergillus oryzae ZZ-01 (AoFT) has been amplified by RACE and TAIL PCR, and functionally overexpressed in Escherichia coli BL 21-CodonPlus (DE3)-RIL. The recombinant A. oryzae ZZ-01 fructosyltransferases (r-AoFT) was purified to homogeneity after Ni-NTA affinity and Superdex-200 gel filtration chromatography. SDS-PAGE analysis of the purified r-AoFT revealed a single protein band with an apparent molecular mass of 60.0 kDa. The r-AoFT enzyme exhibited its optimal activity at 55 °C and pH 5.5, and maintained about 63% of its activity even after 60 min of treatment at 60 °C. The addition of Mg2+ led to an increase in the activity of r-AoFT, whereas Zn2+, Cu2+ and Ni2+ led to a reduction in its activity. Six site-directed mutants of r-AoFT (D39A, D164A, E216A, N38L, S99A and Y282A) were constructed and characterized biochemically. The N38L, S99A and Y282A mutants had lower Km and higher Vmax values than the wild-type enzyme, highlighting their higher binding affinity for the substrates. These results therefore suggest that r-AoFT could be used for the enzymatic synthesis of Suc6A from sucrose and glucose 6-acetate.
Mechanisms of Specificity for Hox Factor Activity
Authors: Zandvakili Arya , Gebelein Brian
Published: May 2016

Metazoans encode clusters of paralogous Hox genes that are critical for proper development of the body plan. However, there are a number of unresolved issues regarding how paralogous Hox factors achieve specificity to control distinct cell fates. First, how do Hox paralogs, which have very similar DNA binding preferences in vitro, drive different transcriptional programs in vivo? Second, the number of potential Hox binding sites within the genome is vast compared to the number of sites bound. Hence, what determines where in the genome Hox factors bind? Third, what determines whether a Hox factor will activate or repress a specific target gene? Here, we review the current evidence that is beginning to shed light onto these questions. In particular, we highlight how cooperative interactions with other transcription factors (especially PBC and HMP proteins) and the sequences of cis-regulatory modules provide a basis for the mechanisms of Hox specificity. We conclude by integrating a number of the concepts described throughout the review in a case study of a highly interrogated Drosophila cis-regulatory module named “The Distal-less Conserved Regulatory Element” (DCRE).
Elevated Serum Titanium Level as a Marker for Failure in a Titanium Modular Fluted Tapered Stem
Authors: McAlister Ian P. , Abdel Matthew P.
Published: May 2016

Serum ion concentrations of cobalt and chromium are commonly used to monitor for the development of local metal reactions in metal-on-metal total hip arthroplasties, as well as dual-modular constructs. Although rarely used in clinical practice, elevated serum titanium levels have the ability to indicate a failure with contemporary revision constructs, such as with titanium modular fluted tapered (TMFT) stems. The authors report the case of a 64-year-old man with a TMFT stem after revision total hip arthroplasty for a dual-modular neck construct who had set screw disengagement with subsequent proximal body loosening. The patient's serum cobalt and chromium levels were normal, but he had a markedly elevated serum titanium level, indicating failure of the titanium modular junction. Implant failures at modular junctions in femoral components are well described. Although several different failure mechanisms have been defined, to the authors' knowledge this is the first reported failure of this particular TMFT stem. In addition, this is the first report describing the use of serum titanium levels in identifying a novel failure mechanism. With the popularity of this stem, surgeons should be aware that an elevated serum titanium level may aid in the diagnosis of this unique complication. [
Orthopedics.
2016; 39(4):e768–e770.]
Morphological alterations in the heart and aorta of rats treated with glucocorticoids
Authors: Dantas R. , Souza K. , Santos D. , Feitosa V. , Fioretto E. , Aires M. , Marçal A.
Published: May 2016

Introduction: The objective of this study was to analyze the morphological structure of the heart and aorta of rats treated with the synthetic glucocorticoid dexamethasone. Material and Methods: Male Wistar rats were divided into two groups: 08 control rats undergoing treatment with a 0.9% saline solution for 10 days and 08 rats treated for 10 days with dexamethasone (2mg/kg animal weight). Results: Histological analysis detected a mild cardiac hypertrophy and 15% reduction of collagen located in the aorta of animals treated with glucocorticoid when compared to the control group. Conclusion: We conclude that treatment with dexamethasone for a period of 10 consecutive days is able to promote morphological changes in the structure of the heart chamber and, impair morphological structure of aorta.
Construir, dibujar, viajar. Algunas notas complementarias sobre el dibujo como fin y como medio
Authors: Otxotorena Juan M.
Published: May 2016

Aún suenan en el aire los ecos del XV Congreso Internacional de Expresión Gráfica Arquitectónica, celebrado en Las Palmas de Gran Canaria en mayo de 2014. El encuentro se centró en la cuestión de ‘los dibujos de viaje en el ámbito de la arquitectura’. Y dio pie a una reflexión no poco interesante, llena de aportaciones relevantes relacionadas con su historia, su práctica y su enseñanza 1. Ahora bien: tal vez se impongan algunas precisiones significativas al respecto. Cabría destacar, por ejemplo, la necesidad de salir al paso de ciertas confusiones conceptuales y de lenguaje; y, en concreto, de identificar con precisión las hipotéticas ‘características diferenciales’ del dibujo como fin y como medio.
La representación gráfica del territorio granadino en los mapas topográficos del siglo XIX
Authors: García-Pulido Luis José
Published: May 2016

El espacio territorial que enmarca a la ciudad de Granada ha suscitado la admiración de cuantos lohan conocido a lo largo de la historia, tal y como lo manifiestan las numerosas descripciones y vistas conservadas. La ciudad se estableció estratégicamente en la zona de contacto entre las últimas estribaciones de Sierra Nevada y la amplia llanura aluvial que configura la Vega de Granada, siendo ambas partes indisociables del paisaje que la caracteriza. Hasta los avances cartográficos del siglo xix no empezaron a levantarse los primeros planos con rigor geométrico de este complejo territorio, surgiendo como documentos estratégicos para su control o para cuantificar su riqueza productiva. En este trabajo se analizan estas primeras planimetrías territoriales granadinas, algunas de ellas de carácter pionero, junto a los criterios de representación gráfica que contienen.
El uso del color. Variaciones en los tejidos de Anni Albers
Authors: Toral Ana
Published: May 2016

El concepto de ‘variación’ descrito por Josef Albers para el desarrollo de su metodología docente, y ampliado en su obra de referencia Interacción del color, se muestra ligado al proceso de construcción compositivo de la retícula textil de Anni Albers. Trabaja en un soporte rígido donde resulta físicamente imposible mezclar colores. Es por esta razón que la investigación en cuanto al color en el tejido que realiza Anni Albers utiliza recursos altamente estimulantes.
Carta de Ravello sobre los aspectos estructurales de la restauración monumental
Authors: Loggia Revista
Published: May 2016

Resumen no disponible
“Stand up, Fight Back”: Why the Attack on Public-Sector Workers Violates the First and Fourteenth Amendments
Authors: Block Megan M.
Published: May 2016

None
Jonathan Coopersmith, Faxed: The Rise and Fall of the Fax Machine. Baltimore: Johns Hopkins University Press, 2015. 320 pp. ISBN 978-1421415918
Authors: Choi Hyungsub
Published: May 2016

N/A
如何に貿易をすべき乎
Authors: Iida Kiro
Published: May 2016

N/A
From the Editor's Desk
Authors: Chaiklin Martha
Published: May 2016

N/A
支那の動亂と三井物産の三人男 Shina no doran to Mitsui Bussan no 3-nin otoko
Authors: Sarumen Kaja
Published: May 2016

N/A
Relationship between Acculturation Attitude and Translation of Culture-Bound Texts
Authors: Rafieyan Vahid
Published: May 2016

Acculturation attitudes, referred to as “sojourner reactions to adaptation into new language and cultural communities” (Culhane, 2004: 51), can be a predictor of translators’ level of intercultural competence during educational sojourns. Intercultural competence, defined as a “complex of abilities needed to perform effectively and appropriately when interacting with others who are linguistically and culturally different from oneself” (Fantini 2006: 12), can accordingly be a predictor of translation quality. To assess the actual relationship between acculturation attitude and quality of translation of culture-bound texts, the current study was conducted on 82 Iranian postgraduate students of Master of English translation at universities in England. The East Asian Acculturation Measure (EAAM), developed by Berry (2001), was adapted to assess translation students’ level of acculturation attitudes toward English culture. Some news excerpts adopted from the British Broadcasting Corporation (BBC) were also selected to assess the quality of translation of culture-bound texts. The analysis of Spearman rank order correlation (rho) revealed the significant positive relationship between acculturation attitude and quality of translation of culture-bound texts. The pedagogical implications of the findings suggested encouraging and providing language learners with opportunities to assimilate or integrate into the host country culture to be able to develop their intercultural competence to an optimal level.
Palabras inaugurales en XVIII Jormnada Universitaria de Desarrollo Científico (JUDC) de FAREM-Estelí
Authors: Rodríguez Pérez Máximo
Published: May 2016

La inauguración de una nueva Jornada Científica en nuestra Facultad, en este acto la número XVIII es siempre motivo de una profunda satisfacción.
Respuesta de crecimiento y floración de Tagetes erecta “San Diego” mediante la agregación de fertilización carbónica atmosférica bajo condiciones controladas Estación Experimental “El Limón”
Authors: Urrutia Josué
Published: May 2016

El establecimiento plantaciones ornamentales, cultivos agrícolas y plantaciones forestales pueden estar afectados por los cambios en el clima que conlleva a un estrés de los organismos y bajar los índices de producción. Este trabajo evalúa los beneficios del gas conocido como dióxido de carbono en su uso como fertilizante atmosférico y conocer sus efectos sobre el cultivo de la planta San Diego (Tagentes erecta). Para el establecimiento del ensayo se utilizaron las instalaciones de la Estación Experimental “El Limón” propiedad de la FAREM-Estelí/UNAN-Managua. Al evaluar los efectos de la fertilidad del CO2, se realizó dentro de microtuneles donde se hicieron las restricciones de este gas, se midió: el crecimiento de la planta en altura y diámetro basal, materia seca, índice de robustez y calidad. Se tomó como referencia la Evaluación del Indice de calidad de Dickson (1960). Los resultados demostraron que no existe diferencia sobre la altura y diámetro basal de las plantas, las dosis que sobre pasan los 400ppm de CO2 aumentan la materia seca de este cultivo ornamental, y esta se incrementa entre un 6 y 7%. Los índices de esbeltez y calidad indican que las plantas sometidas a 400ppm de CO2 son las que podrían sobrevivir mejor en condiciones de climas adversos al ser establecidas en campo.
Representation of Males and Females in Myanmar Culture through a Selection of Myanmar Literary Works in English
Authors: Yi Tin Moe
Published: May 2016

In Myanmar, although men and women have equal rights under the customary law, conservative cultural belief prevents to enjoy these rights between men and women. Therefore men are still superior and women are subordinate in Myanmar society. To reach a better understanding of whether equality exists between men and women in Myanmar society, a particular type of literary work which is reflection of Myanmar culture can be explored. Therefore, Myanmar short stories, written originally in English by Myanmar author Daw Khin Myo Chit and the selection of Myanmar short stories written originally in Myanmar by various kinds of Myanmar authors but translated into English by Myanmar writer Ma Thanegi, are chosen to be investigated. The aim of the present study is to investigate the way in which males and females are represented in Myanmar short stories which reflect Myanmar culture. Gender analysis by Khurshid, Gillani, and Hashmi (2010) is conducted to analyze the data. The quantitative and qualitative methods were used to analyze short stories. It is found that the data found in Daw Khin Myo Chit’s short stories and Ma Thanegi’s translated works were the same. The results showed that there is no significant difference between males and females except occupational roles. It can also be observed that in analyzing Myanmar short stories, although women play the important roles as equal as men in most cases, women are still inferior rather than men according to Myanmar culture and Myanmar tradition.
The Malaya Patriotic Fund Poster Stamp: Developing a Literature Review
Authors: Daud CMILT Dazmin
Published: May 2016

The purpose of this paper is to provide a perspective view pertaining to Malaya Patriotic Fund Poster Stamp which had been used in Malaya during the World War II period. It focuses on the developing a pool of information concerning the denomination, illustration, dimension, color, perforation and design details of the stamps from two main newspapers between the periods of 1939 and 1940. The objective of this study is to arrange and group information about the stamps using content analysis. This study deals with the qualitative approach to this poster stamp in developing a literature review. The findings show that 11 articles from the two newspapers matched with objective of the study. The findings are considered to create a roadmap to design a detail study for exploring Malaya Patriotic Fund Poster in the context of British Colony and World War II.
High Quality - Low Computational Cost Technique for Automated Principal Object Segmentation Applied in Solar and Medical Imaging
Authors: Hayajneh Sofyan M. A. , Rashad AbdulRahman , Saraereh Omar A. , Al hazaimeh Obaida
Published: May 2016

The objective of this paper is to introduce a fully computerized, simple and low-computational cost technique that can be used in the preprocessing stages of digital images. This technique is specially designed to detect the principal (largest) closed shape object that embody the useful information in certain image types and neglect and avoid other noisy objects and artifacts. The detection process starts by calculating certain statistics of the image to estimate the amount of bit-plane slicing required to exclude the non-informative and noisy background. A simple closing morphological operation is then applied and followed by circular filter applied only on the outer coarse edge to finalize the detection process.  The proposed technique takes its importance from the huge explosion of images that need accurate processing in real time speedy manner. The proposed technique is implemented using MATLAB and tested on many solar and medical images; it was shown by the quantitative evaluation that the proposed technique can handle real-life (e.g. solar, medical fundus) images and shows very good potential even under noisy and artifacts conditions. Compared to the publicly available datasets, 97% and 99% of similarity detection is achieved in medical and solar images, respectively. Although it is well-know, the morphological bit-plane slicing technique is hoped to be used in the preprocessing stages of different applications to ease the subsequent image processing stages especially in real time applications where the proposed technique showed dramatic (~100 times) saving in processing time.
Correlation Analysis between Maximal Clique Size and Centrality Metrics for Random Networks and Scale-Free Networks
Authors: Meghanathan Natarajan
Published: May 2016

<span style="font-size: 10.5pt; font-family: 'Times New Roman','serif'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;" lang="EN-US">The high-level contribution of this paper is a comprehensive analysis of the correlation levels between node centrality (a computationally light-weight metric) and maximal clique size (a computationally hard metric) in random network and scale-free network graphs generated respectively from the well-known Erdos-Renyi (ER) and Barabasi-Albert (BA) models. We use three well-known measures for evaluating the level of correlation: Product-moment based Pearson's correlation coefficient, Rank-based Spearman's correlation coefficient and Concordance-based Kendall's correlation coefficient. For each of the several variants of the theoretical graphs generated from the ER and BA models, we compute the above three correlation coefficient values between the maximal clique size for a node (maximum size of the clique the node is part of) and each of the four prominent node centrality metrics (degree, eigenvector, betweenness and closeness). We also explore the impact of the operating parameters of the theoretical models for generating random networks and scale-free networks on the correlation between maximal clique size and the centrality metrics.
Robust Content-Based Digital Image Watermarking Scheme in Steerable Pyramid Domain
Authors: Jamali Khadija , Aroussi Mohamed El , Hossaini Azz El Arab El , Mbarki Samir , Wahbi Mohammed
Published: May 2016

<span style="font-size: 10.5pt; font-family: 'Times New Roman','serif'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;" lang="EN-US">In the digital world in which we are living, the intellectual property protection becomes a concern especially with the proliferation of files transfer over networks. The ability to access data such as text, images, video, and audio has become quicker and easier for people with little to no knowledge of technology. In this paper, a robust watermarking scheme based on the original image content is proposed and simulated. Steerable pyramid transform is used as an embedding domain to its good spatial-frequency characteristics, and its wide applications in the image/video coding standards. The embedding process aims to insert some information in a digital document to identify its owner later. This process requires the original image to be protected and the watermark image related to the image’s owner. It needs also a threshold value used by Sobel-Feldman operator to extract the original image features. The embedding of the watermark image is performed in high frequency components of the original image. Experimental evaluation demonstrates that the proposed watermarking scheme is able to withstand a variety of attacks and at the same time provide good visual quality of the watermarked image.
Hopf-bifurcation Limit Cycles of an Extended Rosenzweig-MacArthur Model
Authors: Joshua Eno E. , E. Madubueze Chinwendu , T. Akpan Ekemini
Published: May 2016

In this paper, we formulated a new topologically equivalence dynamics of an Extended Rosenzweig-MacArthur Model. Also, we investigated the local stability criteria, and determine the existence of co-dimension-1 Hopf-bifurcation limit cycles as the bifurcation-parameter changes. We discussed the dynamical complexities of this model using numerical responses, solution curves and phase-space diagrams.
Análise do conforto térmico humano no outono-inverno em Santa Maria-RS: uma abordagem em escala local e regional / Analysis of human thermal comfort in the fall-winter in Santa Maria - RS: local to regional level approach
Authors: Gobo João Paulo Assis , Galvani Emerson
Published: May 2016

A presente pesquisa avaliou as condições de conforto térmico humano em ambientes externos na cidade de Santa Maria, Rio Grande do Sul, com base na dinâmica atmosférica regional para anos-padrão classificados como mais chuvoso, menos chuvoso e habitual, em meses representativos de outono e inverno. Para tal, utilizou-se da base de dados climáticos do Instituto Nacional de Meteorologia (INMET), sob a qual procedeu-se a construção do banco de dados, no qual foi atribuído o índice de Temperatura Efetiva com Vento (TEv). Verificou-se que os sistemas atmosféricos atuantes exercem expressiva influência sobre as situações de conforto térmico humano em Santa Maria nos meses representativos de outono e inverno, sobrepondo-se aos efeitos dos atributos geográficos tais como a altitude, a continentalidade e a marítmidade.

Palavras–chave: conforto térmico humano, dinâmica atmosférica, anos-padrão.

 

 

Abstract

This study evaluated the human thermal comfort in the Rio Grande do Sul state in Santa Maria city, based on regional atmospheric dynamics for years classified as standard rainier, less rainy and customary in representative months of fall and winter. Thus, was used the weather data base of the National Meteorological Institute (INMET) under which It was carried out to construct the database, where it was assigned the Effective Temperature Wind index (TEv). It was found that the active weather systems exert significant influence on human thermal comfort conditions in Santa Maria. This happens on representative months of autumn and winter, overlapping the effects of the geographical attributes such as altitude, continentality and marítmidade Keywords: human thermal comfort; atmospheric dynamics; standard years.

Keywords: human thermal comfort, atmospheric dynamics, standard years.