bluuebunny/crossref_metadata_2025 huggingface dataset:
Validation of Produced Gas Rate Modelling in an Oil Reservoir with Very High CO2 Through Matching of Live Oil Coreflood
Authors: Mishra Sudhakar , Pandey Amitabh
Published: April 2019

Fatehgarh reservoirs in Aishwariya field, located in Barmer Basin of Rajasthan India, have very high CO2 content in reservoir fluid. A procedure was developed earlier to model the impact of reservoir CO2 on waterflood, polymer flood and ASP flood (Mishra and Pandey 2017, 2018) in this field. Another observation is that in such a system with very high amount of CO2, produced gas rate does not follow conventional trend. Conventionally, gas is dissolved in oil and produced gas is the gas released out from the oil. However, in a system like Aishwariya with very high amount of CO2 in dissolved gas, produced gas is the cumulative of gas released out from both liquid streams i.e., oil and water. Interestingly, gas can continue to produce even after no more oil is being produced from the system. A live oil coreflood was carried out to generate produced gas rate profile under Aishwariya reservoir conditions.

The objective of this work was to validate the modelling procedure developed to predict the produced gas rate in such a system with very high amount of CO2 in reservoir fluid.

A live oil coreflood experiment was carried out using 12 inches long Bentheimer core under Aishwariya reservoir pressure and temperature conditions. After saturating the core with live oil, the core was water flooded with brine for ~3.7 pore volumes. Produced gas volume was measured at different times so as to generate gas production profile.

Two different simulation techniques were used to simulate the experiment and match the gas production profile. First technique was using a compositional simulator with EOS based PVT while the other technique was using an "advanced processes simulator" modeling the component distributions based on partitioning coefficients. Both methods could successfully capture the production of gas from both liquid streams; oil and water and a reasonable match for the produced gas could be obtained.

The approach developed to simulate impact of CO2 on different aqueous based flooding processes in Aishwariya field was validated by matching the coreflood experiment carried out under actual Aishwariya reservoir conditions. It helped to confirm confidence in performance prediction of aqueous based flooding mechanisms planned in Aishwariya field despite the presence of significant amount of CO2.

The paper presents history match of unconventional produced gas profile of a coreflood carried out under Aishwariya field conditions with very high amount of dissolved CO2. The proposed method can be applied to estimate produced gas rate in other fields with very high amount of CO2 in reservoir fluid.
A Holistic Approach for Mitigation of H2S from Crude Oil and Gas in an Offshore/Remote Environment
Authors: Gupta M K , Sukanandan J N , Singh V K , Pawar A S , Deuri BUDHIN
Published: April 2019

In an offshore field, mitigation of H2S from natural gas itself is a big challenge. A situation where high H2S present in well fluid increases the challenges several fold to sweet both processed oil and gas. In a wellhead platform/remote location where manual intervention requirement is minimal, conventional process has several limitation such as space availability, load on structure, frequent monitoring etc., hence may not be suitable for mitigation of H2S from processed gas and oil.

In this work, an approach is adopted for sweetening of sour gas and sour crude in an optimum way, keeping offshore constraints in mind and without usage of rotating equipment's. An integrated simulation model is developed in Aspen HYSYS process simulator wherein well fluid from well manifold is processed in three phase oil and gas separator. The gas liberated from the separator is first sweetened in adsorption columns considering three bed systems unlike general usage of two. The oil is sweetened in an envisaged stripper column utilizing sweet gas from adsorption column as stripping gas. In this work, a three bed adsorption column is envisaged wherein 1st two column in used for sweetening of gas liberated from separator which consists of around 7500ppm H2S. Sour oil from the separator which contains around 2000 ppm of dissolved H2S is processed in a stripper column for mitigation of H2S dissolved in the oil. Sweet gas liberated from 1st two column of adsorber bed is used as stripping gas for oil sweetening. H2S liberated from stripper column is routed to the 3rd column for sweetening. After this gas from all the adsorber column is combined and routed to process platform along with the sweet oil. Analysis reveals that, this scheme can sweeten altogether both oil and gas to the desired H2S level without the need of any rotating equipment's and must be a suitable for remote location.

A holistic approach was taken for sweetening of oil and gas without the need of any rotating equipment's, & any chemicals, unlike the conventional method and hence can be suitably adopted for an offshore environment or at remote location where requirement of manual intervention is bare minimum.
Insights into the Relationship between Equivalent Circulation Density and Drilling Fluid Rheological Properties
Authors: Al-Hameedi Abo Taleb , Alkinani Husam H. , Dunn-Norman Shari , Amer Ahmed S.
Published: April 2019

Equivalent circulation density (ECD) management is a key factor for the successfulness of the drilling operations, especially when dealing with narrow mud-weight windows. Poor management of ECD can result in unsafe and/or inefficient drilling as well as an increase in drilling cost due to associated non-productive time (NPT). Different parameters can affect the ECD directly or indirectly including, but not limited to, wellbore geometry, cuttings, hole cleaning efficiency, flow rate, and rheological properties of the drilling fluid. However, the magnitude of the effect of each parameter is not well understood.

In this paper, a comprehensive statistical analysis using the correlation coefficient was conducted using real field data to investigate the effect of three controllable factors – solid contents (SC), yield point (Yp), and plastic viscosity (PV) – on ECD. Data from over 1000 wells drilled in thirteen oilfields in Iraq were collected, tested for outliers, and examined for normality to appropriately select the method of the analysis.

The results showed that all three parameters have a direct relationship with ECD, or in other words, increasing the values of these parameters will lead to increasing ECD values. However, the plastic viscosity effect showed the highest magnitude, or strongest relationship to ECD, while the yield point resulted in the lowest effect, or weakest relationship with ECD from among these three parameters. Therefore, it is crucial to pay close attention to the magnitude of PV and alter it accordingly.

Understanding the relationship between the drilling fluid rheological properties and ECD is vital for better ECD management in order to minimize the non-productive time and cost associated with ECD-related drilling problems.
Integration of 1D Geomechanics Modeling and High-Performance Water-Based Mud HPWBM System Design, Improving Cost-Effective Drilling of High-Angle Wells Through Cauvery Shale Sequence: A Case Study from Cauvery Basin, Offshore India
Authors: Saha Sankhajit , Gariya Bhuwan Chandra , Panda Debabrata , Perumalla Satya , Podder Tuhin , Thanvi Shrikant , Deshpande Chandrashekhar
Published: April 2019

Drilling through the thick shale sequence (Oligocene to Paleocene age) of Cauvery offshore showed severe wellbore instability in the past due to incompatible mud program that increased overall operational cost. While new high-angle sidetrack development wells had been planned, three major challenges need to be addressed. First, proper mud weight recommendation for preventing mechanical instability; second, introduction of a cost-effective mud system preventing time-sensitive failure; and finally, mitigating the environmental impact factor of the mud system.

Geomechanical modelling and Hole Stability analysis had been performed based on available dataset. An optimized mud weight (MW) program was developed based on the analysis. Considering the time-dependent failure characteristics of the shale and overall cost effectiveness, just modifying the mud weight does not address all of the challenges delineated above. Consequently, special "high-performance water-based mud system (HPWBM)" was designed instead of oil-based mud (OBM). This HPWBM was formulated based on the nature of shales encountered. While drilling, real-time geomechanics further facilitated controlled drilling conditions and optimized the mud program.

The well-based geomechanical model indicated a hydrostatic pore pressure gradient in the region. The relative magnitude of three principle stresses showed a normal fault stress regime and maximum horizontal stress (SHmax) azimuth appeared to be nearly aligned to the N-S direction. Hole Stability analysis showed that a minimum of 12 ppg mud weight was required to drill the 8½" section. The sidetrack holes had a maximum inclination of 75 to 77 degrees. Different polymers and bridging agents were added to prepare the customized HPWBM in order to address shale instability and formation damage due to overbalance. Real-time monitoring during drilling operation utilized logging while drilling (LWD) log data, drilling parameters and mud logging data to promote smooth drilling operations. Through systematic planning and execution, the high-angle sidetrack holes had been drilled with zero non-productive time (NPT) in terms of well bore stability. More than 50% cost reduction was achieved on the mud system.

An integrated solution that includes pre-drill geomechanics, HPWBM system design and real-time well monitoring helped to reduce the risks due to model uncertainties while drilling high angle wells through the thick shale section. This approach helped to reduce significant operational cost with an improved success rate.
Efficient Horizontal Wellbore Placement and Completion with Geosteering and Zonal Isolation in a Reservoir on Waterflood: A Case Study of Western Offshore, India
Authors: Kisku Sayanima , Santhosh Kumar R. , Dayal Har sharad , Chadha Harish Kumar , Srivastava Anil
Published: April 2019

Infill drilling is an integral part of brown field management for exploiting un-drained areas with good oil saturation. In a matured field on water-flood, the primary objective is optimized wellbore placement of infill wells in areas with better petro-physical characteristics, bypassing flooded region. It is also important to design a robust completion strategy to safeguard the longevity of these wells by curtailing produced water. This approach assists in dramatic increase in production by isolating water charged sections and thereby restricting rise in water production.

The use of advanced Logging-While-Drilling techniques during horizontal drilling provides an opportunity for effective well planning. Real-time Logging-While-Drilling instruments during directional drilling gives us the opportunity to acquire information pertaining to the reservoir in a single run. Interpretation from the real-time data acquisition boosts the planning during wellbore drilling.

This paper discusses a case study of a field in western offshore, India, which focuses on the applications of geosteering and the use of swell packers for zonal isolation to augment oil production. In this study, two wells have been deliberated where the real-time information has been extracted and included in the decision making process. The bottom-hole assembly used in this case, comprised standard Logging-While-Drilling services such as gamma ray, resistivity, neutron porosity, density and density imaging services and also formation pressure testing.

Since the field under study is a carbonate reservoir that has been on waterflood for the last twenty eight years, chances of early breakthrough of water in the infill wells has posed a high risk in spite of the presence of good bypassed oil saturation. Geosteering has enabled to restrict the horizontal section safely within the desired zone of better oil saturation and geological features, as interpreted from the Logging-While-Drilling data. Further isolation of suspected water bearing zones with swell packers have assisted in healthy well completion by diminishing chances of sharp rise in water cut in the infill wells.
Successful Geo-Steering in Complex Reservoir Lateral Changes, Dip Uncertainties and Low Resistivity Contrast with the Help of Distance to Boundary Measuring, Forward Modeling and Imaging Capabilities
Authors: Pathak Prateek , Sharma Ashish , Thar Hiten
Published: April 2019

Baker Hughes drilled one horizontal well for major Indian operating company in a, low resistivity contrast field, onshore India. The candidate field / basin is a proved petroliferous basin, located in the northeastern corner of India.

The scope of work for this project involved integrating geological and open hole offset parameters to build a Geosteering model. Integrated data included a study of offset well data from the field, regional and local dip analysis from wellbore images, and a review of structural maps. Successful integration of these data helped to steer the well in the desired zone as per plan and make the best use of the data and to reduce uncertainties in Geosteering, drilling. Although high-quality 16-sector images commonly yield bedding dip, fracture and other geological information, this paper emphasizes how real-time reservoir navigation decisions was made using Geosteering modelling, real-time image processing, dip picking study etc.
Introduction to an Effective Workover Method to Repair Casing Leak
Authors: Singh Pratyush , Al-Yami Abdullah , Wagle Vikrant , Safran Ali
Published: April 2019

Wellbore integrity is very critical in oil and gas industry and needs to be maintained through the entire cycle of well's life. The most important item for well integrity is to set cement between two casings or between casing and formation. A good cement job provides isolation and protection for the well and a poor cement job can have cracks and allows corrosive fluids to migrate through micro channels.

Downhole casing repair is a common workover operations worldwide, especially in wells that have been producing over number of years. It is very challenging to control corrosive fluid migration which slowly corrodes casing and tubing over time. An innovative epoxy resin formulations has been developed and tested in the field to repair casing leaks which is extremely easy to handle and very economical. A cost-effective workover program can be developed and implemented depending on the severity of the leak.

The improved approach of using innovative resin can be used by mixing with cement blends to repair major casing damage and can also be used as standalone application to fix minor leaks. The system maintains extremely good rheological properties even when mixed with cement. The system has ability to withstand high differential pressure and is also resistant to acid, salts, hydrocarbons and most importantly various corrosive liquids. The precise application is determined by measuring the injectivity of the well. In the low injectivity wells, only epoxy resin solution will be spotted and repair the damaged casing. In the high injectivity wells, the chemical will be mixed with cement and completely seal the damaged zone. The chemical will enhance the mechanical properties of the cement and will be more resilient to extreme down-hole condition.

The paper will emphasize the added value and potential of the method in restoring the casing integrity. The paper will also discuss the laboratory test reports and application which will highlight effective and economical outcome.
Executing and Monitoring Cement Job Real Time
Authors: Al-Yami Abdullah S. , Aljardan Moaathe A. , Alshaikh Abrar A. , Gharbi Salem H.
Published: April 2019

Primary cementing operations rank among the more important events that occur during a well's lifetime. The cement sheath plays a critical role in establishing and maintaining zonal isolation in the well, supporting the casing and preventing external casing corrosion.

For many years, the industry has employed strategies to promote optimal cement placement results. These strategies, collectively known in the industry as good cementing practices. Job execution is the key to insure success of the job based on the designed.

New technology that give us optimum execution evaluation (OEE) has been developed to enhance cement job execution by overlapping the design parameter over with the execution parameter real time. The OEE technology significantly improves cementing operations, enabling operators to monitor, control, and evaluate cement placement in real time. OEE combines job design data with acquisition data from both the rig and the cementing equipment to provide a more accurate representation of the job as it is being run.

In this paper, we present the process that we completed with detailed operational setup to allow us to monitor and record all parameters related to the cement job execution and the work flow implemented to be able to evaluate the cement job design and execution to achieve the required objectives. This study is also setting the basis to establish development of real time automated cementing advisory system.
Recovery of an Offshore Platform Slot with Improved Mill Design & Technique
Authors: Gupta Arpit , Thomas Emil , Gupta Shubham
Published: April 2019

The success of a pilot milling operation is dependent on the mill design, adherence to correct milling parameters and precise location of stabilizing members in the bottomhole assembly (BHA), especially while milling through large casings such as 20 inch inside 30 inch conductor. This paper discusses the importance of correct mill design and stabilization of the BHA, along with field results from milling with under-gauged mill and stabilizers.

Pilot milling interventions to facilitate open-hole side-tracking can be very effective and cost-efficient, especially in cases where retaining the original borehole size is necessary for further workover operations, for example, when liner is milled for this purpose. Pilot milling is a suitable option where sidetracking with a whipstock is not viable, as when casing has collapsed, with internal diameter restrictions, or situations where irreparable surface damage to conductor pipe and casing have occurred due to corrosion. Such situations might result in losing an offshore platform slot, which is a huge cost to operators.

One such situation was encountered where 30 inch conductor pipe parted at the water line due to corrosion. Prolonged exposure to corrosion further led to 20 inch casing parting at the water line as well. Surface repairs were attempted but were unable to arrest annulus leakage. In order to recover the slot, an improved and specially designed pilot mill was used. A stabilized milling bottom-hole assembly with precise sizes and locations of stabilizers was incorporated. This new mill design resulted in milling 585.6 feet of 20 inch casing with an average rate of penetration (ROP) of 2.6 ft/hr. The new mill design resulted in good mill life and only two mill runs were made in the entire milling operation. Results of torque and drag simulations to study the bending stresses and torsional stresses on mill string components while milling are discussed. Catastrophic effects of using under-gauged mill and stabilizers were also examined.

This improved mill and stabilized bottom-hole assembly design offers optimum ROP, improved mill life, reduced surface vibrations and a fine metal cutting structure that eases metal debris handling at surface.
Integration of Drilling, Geology and Geophysical Data: Developing High Resolution Predrill Wellbore Stability Model for Ultra-Deepwater Field Development
Authors: Kumar Ashutosh , Dutta Jayanta , Bhardwaj Nitin , Gunasekaran Karthikeyan
Published: April 2019

The key objective of this study was to develop a high resolution wellbore stability model for planned highly inclined development wells of an ultra-deepwater field through integrating geological, geophysical, petrophysical and drilling data to design optimized drilling mud weight window.

This study describes a customized high resolution wellbore stability modelling process for development wells in ultra-deepwater setting, where shale and sandstone have different pore pressure and stress magnitudes. Un-calibrated and calibrated seismic velocities along with offset well data were used to generate the high resolution pore pressure model for the overburden shale section. Laboratory based geo-mechanical tests, petrophysical logs and offset well events were integrated for the estimation of sub surface stresses and rock mechanical properties for overburden shale and sandstone. Subsequently, separate wellbore stability model was built to estimate the shear failure gradient for overburden shale and sandstone.

This study suggests that the mud weight (MW) window in the overburden is primarily governed by two parameters – (i) sand-shale pressure equilibrium state, and (ii) stress anisotropy. The intervals where the sand and shale are not in pressure equilibrium state (i.e. shale pressure > sand pressure), the minimum MW requirement is defined by either pore pressure or shear failure gradient (SFG) of shale formation. Whereas, maximum limit is marked by fracture gradient of relatively less pressured sand formation. Therefore, in such intervals mud weight window becomes much narrower (~1 ppg) than those intervals where sand and shale is in pressure equilibrium (~1.6 ppg). This study also highlights the increase of minimum MW requirement (SFG) in some intervals having relatively higher stress anisotropy. The minimum MW requirement within the main reservoir section having thin intra-reservoir shale is controlled by the SFG of the sand formation, as strength is lower in the reservoir sand than intra-reservoir shale. Results show the importance of high resolution modelling in order to capture pressure uncertainty, thin sands, sand/shale pressure equilibrium state, stress anisotropy and its effects in defining the optimum mud weight window. Based on analysis, further risk zonation was done to highlights intervals prone to wellbore collapse and mud loss.

This paper illustrates how the integrated high resolution wellbore stability modeling would help in optimum mud weight planning for highly deviated / horizontal wells to minimize the drilling risks and non-productive time (NPT), especially for challenging field development settings (deepwater, ultra-deepwater, high stress, High pressure High temperature).
Las rutas posibles de los proyectos de innovación: un análisis de casos
Authors: Rosales Ch´avez Jonatan , Cruz L´opez Lucio , Dom´ınguez  Arce Dayan , Parra Castrillón José Eucario
Published: April 2019

El objetivo de este artículo es hacer un análisis sobre alternativas metodológicas de  los proyectos de innovación empresarial y social y la necesidad de su  alineación con estrategias generales de las organizaciones. Se exhibe un compendio conceptual  sobre tipologías, modelos y metodologías para  el desarrollo de innovaciones y se hace un análisis con base en unos casos de  proyectos fallidos: una solución de software para un problema de logística, una iniciativa de red de pequeñas cooperativas, un modelo de gestión del conocimiento y una propuesta de teletrabajo y e-learning para la educación. La situación problemática considera que hay dilemas sobre  las rutas de las innovaciones debido a perspectivas que las  ubican a veces como estrategia  para la competitividad cuando el ámbito es  empresarial o para agregar valor a los beneficios cuando es  social, pero también en otras ocasiones, como realizaciones con sentido esnobista para satisfacción de intereses personales o coyunturales. La reflexión  central es que los proyectos de innovación deben conjugar metodologías globales con realidades y protocolos específicos de sus contextos e independiente de su tipología, deben congregar a los interesados para consensos y aportes colaborativos.
Modelo cinemático del martillo de un molino de martillos operando sin carga empleando la mecánica de Lagrange
Authors: Gil Parra Sneider Alejandro , Espinosa Bedoya Albeiro
Published: April 2019

La mecánica de Lagrange permite modelar y simular las variables cinemáticas de máquinas, sistemas mecánicos o mecanismos complejos, su aplicación es general y se ha usado en máquinas agrícolas, robótica entre otros. En el caso del molino de martillos el foco se centra en el sistema tambor-martillo. Las características geométricas de los elementos del sistema y la velocidad de entrada fueron tomadas empleando instrumentos de medición. El modelado del sistema empleando la Mecánica de Lagrange permitió obtener ecuaciones diferenciales que describen la posición angular, velocidad angular y aceleración angular en función del tiempo y las variables conocidas. La evaluación numérica de estas mostró resultados acordes con las observaciones experimentales.
A felsőoktatás oktatóinak szakmai fejlődése: az oktatói identitás alakulása és a tanulás módjai
Authors: Kálmán Orsolya
Published: April 2019

Az oktatók mint tanárok szakmai fejlődése és tanulása kevéssé feltárt a hazai felsőoktatási kontextusban, pedig a tanulástanítás minőségének javítása egyre nagyobb figyelmet kap a nemzetközi térben. Jelen kvalitatív kutatás célja, hogy az oktatók oktatói önértelmezéseit és ezek változását, az oktatói identitáskonstrukciókhoz kötődő tanulási folyamatokat azonosítsa. Tizenkét, az oktatásra nyitott oktatóval készítettünk élettörténeti és kvalitatív tematikus interjút. Az oktatói mintaválasztásba négy területről (pedagógusképzés, állam- és jogtudományi, gazdaságtudományi, orvostudományi) kerültek be kezdő, tapasztalt és az oktatás területén vezetői gyakorlattal rendelkező, tapasztalt oktatók. Az élettörténeti interjúk kiegészültek az időszalag és a kritikus esemény technikájával. Mindezek alapján a narratív elemzés az oktatói élettörténetekben megjelenő identitáskonstrukciókat és ezekhez kötődő jellegzetes időszakokat azonosította, majd a mintázatokban megjelenő különbségeket vizsgáltuk meg a három oktatói csoport közt és azon belül is. Az eredmények azt mutatják, hogy a három oktatói csoport önértelmezései eltérő mintázatokat mutatnak: a kezdő oktatók önértelmezésében jelentős lépést jelent a hallgatóközpontú tanításra figyelő oktató, a tapasztalt oktatóknál a tudatos, pedagógiai megközelítéssel rendelkező oktató képének megjelenése, míg a vezetői gyakorlattal is rendelkező oktatók a tanulásközpontú, magukat is tanulóként értelmező oktatói önértelmezést emelték ki. Az oktatásfejlesztéshez kötődő feladatok és szerepek minden oktatói csoport számára önértelmezést alakító tényezőkként jelentek meg és lényeges tanulási folyamatokat is ösztönöztek. Eredményeinkkel hozzá kívánunk járulni a tanulásközpontú pedagógia és az oktatói önértelmezések árnyalt értelmezéséhez, valamint a támogatási lehetőségek megalapozott tervezéséhez.
Alteration of denitrifying microbial communities by redox mediators available at low temperature
Authors: Yuan Hongying , Li Yuanling , Zhang Xiaoya , Wang Xue , Wang Hongybin
Published: April 2019

Four sequential batch reactors (SBRs) containing synthetic sewage for denitrification were investigated in this study. Three of them had added one of the three redox mediators, which were anthraquinone-1,5-disulfonate (AQDS), 1,2-naphthoquinone-4-sulfonate (NQS), and 2-hydroxy-1,4-naphthoquinone (LAW), operated at 20 °C and 10 °C, and an additional one to serve as the control. Results showed that 10 °C inhibited denitrification to a considerable extent, but the addition of mediators increased the denitrification rate and efficiency. The total nitrogen removal efficiency increased in the presence of three different redox mediators (100 μmol/L), among which LAW express the best accelerating effectiveness at normal temperature and NQS at low temperature. This may be due to the growth of microorganisms, whose community compositions changed considerably when the different redox mediators were added. Therefore, Illumina MiSeq sequencing was used to identify the different microbial communities. Thauera was dominant at 10 °C (25.60%). Furthermore, the addition of mediators greatly promoted Thauera growth (31.11%–42.41%), especially LAW (42.41%). At 20 °C, Candidatus Competibacter (8.31%–9.59%) and Denitratisoma (6.33%–7.39%) were dominant. Thauera and Denitratisoma are denitrifiers. These results could improve understanding of the sewage biological process at low temperature.
The effect of the temperature distribution along the perimeter of the boundary on the the flow in the convective Rayleigh-Benard cell
Authors: Malyshev V.L. , Moiseeva E.F. , Moiseyev K.V.
Published: April 2019

This paper is devoted to the study of the natural convection of a viscous incompressible fluid in a two-dimensional cell with combined vertical and horizontal heating in symmetrical and asymmetrical cases; investigation of the dependence of the maximum speed and intensity of heat exchange on different heating regimes.
Capillary flows and self-assembly of porous hydrate structures
Authors: Amel’kin S.V. , Igoshin D.Ye.
Published: April 2019

A self-assembly model for porous hydrate structures is proposed, which takes into account the sequence of basic physical processes: hydrate growth on the surface of the aqueous solution, formation of islet structure, capillary flow, separation and transfer of secondary crystallization nuclei to the meniscus. The model was studied within the cellular automata method. A good correspondence between the results of the simulation and the experimental data is obtained.
Influences of Masticatory Function Recovery Combined with Health Guidance on Body Composition and Metabolic Parameters
Authors: Takeuchi Hiroaki , Terada Mika , Kobayashi Kazuko , Uraguchi Masahide , Nomura Yoshiaki , Hanada Nobuhiro
Published: April 2019

Background:

Tooth loss reduces masticatory function. Insufficient masticatory function causes an increase in carbohydrate intake while decreasing the intake of foods with a low Glycemic Index (GI) and high in protein, antioxidants, dietary fiber, vitamins, and minerals. Protein-energy malnutrition may lead to metabolic syndrome, frailty, and faster onset of Non-Communicable Diseases (NCDs). Individuals with tooth loss resulting in problematic eating habits require behavior modification and health guidance.

Objective:

This report aims to evaluate the influence of dental prostheses combined with health guidance on body composition and metabolic parameters.

Methods:

Data were collected from three subjects: Two with molar loss and one with edentulism. Masticatory function was restored in each subject through prosthodontic treatment. Masticatory performance was evaluated before and after the prosthodontic treatment by having the subjects chew a gummy jelly and measuring the glucose extraction. Questionnaires were used to assess food intake and lifestyle habits. Health guidance based on the results of the questionnaires was conducted simultaneously with the prosthodontic intervention. Body composition and blood pressure were measured and blood tests were performed at baseline and around 90 days after the first health guidance session.

Results:

Masticatory ability, body-mass index, basal metabolism standard value, body-fat percentage, and intake of certain nutrients improved in all cases. Blood pressure and hemoglobin A1c improved in two cases.

Conclusion:

Masticatory function recovery combined with health guidance was effective in preventing the onset or deterioration of NCDs in patients with masticatory dysfunction.
Use of 3D Imaging for Treatment Planning in Cases of Impacted Canines
Authors: Portelli Marco , Nucera Riccardo , Fastuca Rosamaria , Cicciù Marco , Lo Giudice Antonino , Militi Angela
Published: April 2019

Background:

The use of 3D imaging offers the possibility to improve diagnosis and treatment planning in several fields of dental science.

Objective:

The aim of this study is to evaluate the usefulness of 3D evaluation for surgical exposure treatment planning in cases of impacted canine.

Methods:

This retrospective study has been conducted on the clinical reports of twenty patients (11 F - 9 M) with a mean age of 15.4 years, affected by the impacted canine. Each patient underwent a CBCT exam (Hitachi MercuRay, Hitachi Medical Technology, Tokyo, Japan), in order to obtain sagittal, axial and coronal images and a 3D surface rendering. The images have been evaluated by 14 experts orthodontists who were divided into two groups. The first group first evaluates the bidimensional images and then the 3D images and the second group instead has done exactly the opposite. Each orthodontist has elaborated a treatment plan for the impacted canine correction with a specific indication about surgical exposure approach (Palatal-Vestibular) and orthodontic biomechanics.

Results:

The level of concordance in treatment planning of the 3D images evaluation and the bidimensional images was found to be greater in the second group of orthodontists. Moreover, in this group, the time spent for the treatment plan has been lower than in the first group (12 ± 3.32 min vs. 23 ± 2.53 min, p < 0.05).

Conclusion:

According to the results of the present study, it is possible to state that CBTC is fundamental for the diagnosis and treatment planning of impacted canine. However, further studies are necessary to confirm the greater reliability of 3D surface rendering compared to the bidimensional images.
Antibacterial and Antioxidant Activities of Nasturtium officinale Essential Oil on Food Borne Bacteria
Authors: Mahdavi Saman , Kheyrollahi Mojtaba , Sheikhloei Hossein , Isazadeh Alireza
Published: April 2019

Introduction:

The use of synthetic preservatives has been increasing in the food industry, and this leads to an increased incidence of gastrointestinal diseases and cancers in humans in the long run.

Aims & Objectives:

The aim of this study was to investigate the antibacterial and antioxidant activities of Nasturtium officinale essential oil on some important food borne bacteria.

Materials & Methods:

In this study, the antibacterial activity of N. officinale essential oil was evaluated on Staphylococcus aureus, Bacillus cereus, Escherichia coli and Salmonella enteric by microdilution method. Also, the antioxidant activity of this essential oil was evaluated by inactivating free radicals produced by 2,2-diphenyl-1-picrylhydrazyl (DPPH). Finally, the chemical compounds of the N. officinale essential oil were evaluated by gas chromatography- mass spectrometry (GC/MS).

Results:

The results showed that S. enteric and E. coli isolates had the most resistance and B. cereus isolates had the most susceptibility to N. officinale essential oil. The evaluation of antioxidant properties showed that in the same concentrations, the antioxidant effect of N. officinale was less than BHT. The obtained results from GC/MS showed that Phytol (30.20%) was the highest proportion and Megastigmatrienone 2 (0.18%) was the lowest proportion of essential oil.

Conclusion:

In general, the results of this study showed that N. officinale essential oil has an appropriate antibacterial activity against gram positive bacteria and can be used as a new antibacterial and antioxidant compound in the food industry.
The effect of tri hita karana culture in relationship between work stress and internal auditor performance
Authors: Aditya A.A. Gde Dwi , Kusuma Made Gede Wira
Published: April 2019

The purpose of this study was to obtain empirical evidence regarding the effect of work stress on auditor performance, and Tri Hita Karana's cultural ability to moderate the effect of work stress on auditor performance. The technique of determining the sample used is the nonprobability sampling method with a purposive sampling technique. The questionnaire is used as a method of data collection. The questionnaire is used as a method of collecting data sent to the internal auditors of Rural Banks (BPR). Of the 51 questionnaires distributed to all BPRs in Badung Regency, 43 questionnaires were feasible to analyze, with a questionnaire return rate of 94 percent and a questionnaire level that could be used at 84 percent. The hypothesis was tested at a 5 percent significance level using the Absolute Difference Value Test. The hypothesis was tested at a significance level of 5 percent using the Absolute Difference Value Test with the SPSS program. The output of the research instrument testing shows that the instrument has passed the validity and reliability test, and has fulfilled the classical assumption test requirements.
When All Else Fails, Listen to the Patient: A Viewpoint on the Use of Ecological Momentary Assessment in Clinical Trials
Authors: Mofsen Aaron M , Rodebaugh Thomas L , Nicol Ginger E , Depp Colin A , Miller J Philip , Lenze Eric J
Published: April 2019

A major problem in mental health clinical trials, such as depression, is low assay sensitivity in primary outcome measures. This has contributed to clinical trial failures, resulting in the exodus of the pharmaceutical industry from the Central Nervous System space. This reduced assay sensitivity in psychiatry outcome measures stems from inappropriately broad measures, recall bias, and poor interrater reliability. Limitations in the ability of traditional measures to differentiate between the trait versus state-like nature of individual depressive symptoms also contributes to measurement error in clinical trials. In this viewpoint, we argue that ecological momentary assessment (EMA)—frequent, real time, in-the-moment assessments of outcomes, delivered via smartphone—can both overcome these psychometric challenges and reduce clinical trial failures by increasing assay sensitivity and minimizing recall and rater bias. Used in this manner, EMA has the potential to further our understanding of treatment response by allowing for the assessment of dynamic interactions between treatment and distinct symptom response.
Informational Capability and the Development of Village Information System and Village Owned-Enterprises in Four Villages in Java
Authors: Pamungkas Arie Setyaningrum
Published: April 2019

Undang-Undang Desa Indonesia No. 6 tahun 2014 mengamanatkan negara untuk memperlakukan desa sebagai subjek pembangunan melalui fasilitasi oleh pemerintah pusat. Fasilitasi semacam itu dicontohkan oleh pengembangan infrastruktur komunikasi dan teknologi informasi (TIK) yang berkenaan dengan prinsip-prinsip transparansi, akuntabilitas, dan partisipasi demokratis. Studi ini meneliti tiga isu utama tentang TIK untuk pembangunan pedesaan. Pertama, penerapan sistem informasi desa (SID) untuk mendukung layanan publik. Kedua, ekonomi kreatif penduduk desa dicontohkan dengan mendirikan 'perusahaan milik desa' (Bumdesa). Ketiga, memetakan potensi keunggulan serta kerentanan dalam implementasi SID dan Bumdesa. Studi etnografi melibatkan empat wilayah pedesaan di Jawa yang terdiri dari tiga desa di Provinsi Daerah Istimewa Yogyakarta, dan satu desa di Provinsi Jawa Timur untuk studi banding. Hasil penelitian ini menyimpulkan bahwa meskipun keempat desa telah menerapkan SID sehingga mampu menunjukkan profil lengkap desa di situs web mereka, orientasi TIK untuk pembangunan pedesaan hampir tidak ada. Masih ada perbedaan orientasi dalam memanfaatkan data desa antara penduduk desa, relawan desa, dan pemerintah desa. Ini terjadi karena kurangnya kapabilitas informasi. Kapabilitas informasi sangat berpengaruh dalam distribusi informasi dan partisipasi penduduk desa yang terlibat dalam pembangunan pedesaan khususnya dalam mengembangkan ekonomi kreatif berdasarkan sumber daya desa dan pengetahuan serta praktik yang secara khusus dimiliki penduduk desa.
Pactando con el diablo: problemas metodológicos y éticos de la investigación en contextos violentos
Authors: Ascensio Martínez Christian
Published: April 2019

Las recomendaciones extraídas del trabajo empírico pueden ser útiles para quienes pretenden incursionar en los temas de violencia e inseguridad y desean conocer algunas vicisitudes a las que se enfrentarán, y cómo otros investigadores han logrado atenuarlas o resolverlas. No hay duda de que, en contextos peligrosos, la observación directa implica riesgos latentes y evidentes a la integridad física y psicológica, pero también suele ser el método más adecuado cuando hay ausencia de datos duros y registros oficiales, precisamente por el control territorial, la desconfianza y las propias reglas informales de los grupos a estudiar, lo cual genera grandes obstáculos para el acercamiento y la duración del trabajo de campo. En consecuencia, en este artículo se expondrán algunas recomendaciones de carácter metodológico y ético para realizar un trabajo de campo en contextos violentos de manera efectiva, propositiva y, hasta cierto punto, segura. Para ello se recurrirá a la literatura especializada y a la experiencia del autor al realizar una investigación sobre pandillas en la Ciudad de México.
Romper los cercos del silencio
Authors: Montemayor Carlos
Published: April 2019

Prólogo al libro: Moya, Rodrigo (2004), Foto insurrecta, Ediciones El Milagro, México, 2004, pp. 9-11
La influencia del hábito lector en el empleo de internet: un estudio con jóvenes universitarios
Authors: Elche Larrañaga María , Yubero Jiménez Santiago
Published: April 2019

La universidad exige prácticas de búsqueda, obtención, evaluación, procesamiento e interpretación de la información en soporte digital, por lo que los estudianteshan de llegar a ser expertos decodificadores y lectores críticos, pero no basta con ser nativos digitales. Para aprovechar las potencialidades de la web 2.0 es imprescindible que se posea competencia lectora. A partir de los resultados de esta investigación, realizada con una muestra significativa de estudiantes provenientes de distintas universidades, se definen perfiles específicos del uso de internet vinculados con el hábito lector. Los datos revelan que los universitarios no explotan al máximo las posibilidades de desarrollo académico y de aprendizaje que les brinda internet. Sereafirma la necesidad de insertar la lectura en el proyecto académico-profesional, asumiendo las TIC como un instrumento esencial para el aprendizaje.
Producción científica española en literatura desde una perspectiva de género a través de Web of Science (1975-2017)
Authors: Haba-Osca Julia , Osca-Lluch Julia , González-Sala Francisco
Published: April 2019

Se realiza un estudio comparativo desagregado por sexos de la producción científica en literatura de los investigadores que trabajan en instituciones españolas. Se han identificado 806 autores que han publicado algún trabajo de literatura en revistas indexadas en la WoS hasta el año 2017, analizando comparativamente su productividad y patrones de colaboración considerando la variable sexo. El 55.51 % de los autores identificados fueron hombres frente a un 44.49 % de mujeres. Los resultados muestran que entre los grandes productores del ámbito de la literatura predominan los hombres. Entre los productores moderados (2-5 trabajos), el 50.36 % de los autores identificados fueron hombres frente a un 49.64 % de mujeres. Aunque predominan los trabajos realizados individualmente, como sucede en otras disciplinas científicas, se observa que hay un aumento de los trabajos realizados en colaboracióna lo largo del tiempo, y aquellos en los que participan entre 3 o 4 autores están realizados por grupos formados por hombres y mujeres. Como conclusión se podría indicar que en la literatura española todavía no existe una igualdad de género, especialmente cuando se considera la élite de la investigación. Resulta fundamental profundizar y seguir realizando estudios que evalúen la evolución y tendencias de forma desagregada por sexos para acometer las medidas correctoras necesaria que permitan alcanzar la igualdad de género.
Hemangiopericitoma meníngeo
Authors: Aguiar Paulo Henrique , Godinho Fabio , Figueiredo Eberval Gadelha , Miura Flávio Key , Rotta José Marcus , Freitas Alexandre Bruno Raul , Maria Alexandre , Soglia Jean Roberto , Joaquim Marcos Augusto Stavale
Published: April 2019

Os autores apresentam 7 casos de pacientes portadores de hemangiopericitomas meningeos (HPM), operados no Hospital das Clínicas da Universidade de São Paulo (HCFMUSP) de 1990 a 1997 Aspectos relativos ao quadro clinico, anatomia patológica e terapêutica são discutidos, com ênfase na necessidade de embolização pré-operatória e na complementação terapêutica com radioterapia.
Malformação arteriovenosa dural
Authors: Lucas César De Paula , Prandini Mirto Nelson , Bonatelli Antonio De Pádua
Published: April 2019

Foram estudados, retrospectivamente, casos de malformação arteriovenosa dural (MAVD) obtidos da literatura mundial. Com esse propósito, foram revisados os arquivos da litratura mundial com esse propósito, foram revisados os arquivos da Biblioteca Regional de Medicina (BIREME) e Medine publicados anteriormente a 31 de dezembro de 1997. O objetivo deste estudo foi compreender a história natural das MAVDs, Identificando a melhor alternativa terapêutica oferecida na literatura. Adicionalmente, aspectos relacionados relacionados à etiologia à fisiopatogenia, ao quadra clínico, à classificação e as características angiográficas foram igualmente estudados e avaliados. O padrão de drenagem venosa, incluindo a presença de trombose venosa sinusal, drenagem venosa leptomeníngea e aneurisma venoso displástico, foi relacionado com o valor preditivo para hemorragia intracraniana. As MAVDs foram divididas, quanto à localização, em fossa posterior, fossa média, seio cavernoso, seio sagital superior – convexidade, seio transverso-signóide, incisura do tentório e forame magno. As várias modalidades de tratamento oferecidas pela literatura foram estudadas com intuito de definir a meljor opção terapeutica capaz de promover uma cura clínica e angiográfica para as MAVDs de deversas localizações.
Osteoma nasofronto-orbitário associado com mucocele e abscesso cerebral
Authors: Vialogo Josué Guimarães Granha , Dias Vanderson Glerian , Padula Maria Carolina , Leite Livio Viana de Oliveira
Published: April 2019

Os autores apresentam o caso de um paciente de 17 anos com esteoma dos seios paranasais, envolvendo a junção do seio frontal e teto da órbita esquerda. Houve expansão do esteoma, inferiormente, para o seio etmoidal, lateralmente, para a órbita e, superiormente, para o seio frontal, com erosão da tábua interna, alcançando a cavidade craniana e resultando em grande abscesso frontal esquerdo. Geralmente, ascomplicações são isoladas, mas, nesse caso, a lenta expansão do osteoma causou alterações orbitárias, nasais e cerebrais. Os aspectos clínicos, radiológicos, cirúrgicos e cosméticos dessa rara tríade (osteoma, mucocele e abscesso cerebral) sãodiscutidos. O diagnóstico prévio e correto dessas lesões é crucial para se evitar um tratamento extremamente agressivo desta doença benigna, pois a maioria das lesões tumorais nesta região é maligna e requer tratamento mais radical. O tratamento desse caso requereu abordagem simultânea do absccesso cerebral e das complicações orbitrárias e nasais do osteoma, com reconstrução do anel orbitrário superior esquerdo e da fossa anterior do crânio. Discutimos a técnica cirúrgica, indicações e vantagens, de acordo com princípios de cirurgia craniofacial e de base do crânio na abordagem desse paciente.
Plasmocitoma de crânio
Authors: Amantéa Andréa Vieira , Damasceno Rogério , Neto Aziz Rassi , Stávale João Norberto
Published: April 2019

Os autores relatam caso de um paciente do sexo masculino com quadro de progressivo crescimento de tumoração frontal direita. Submetido à resseção cirúrgica completa da lesão, mostrou o anatomopatológico tratar-se de plasmocitoma. Doença rara, o plasmocitoma solitário do crânio corresponde a menos de 1% das neoplasias plasmocitárias sem disseminação sistêmica. Nosso trabalho visa à abordagem de vários aspectos desse raro tumor, enfatizando o trataemnto realizado e revisando a literautra.
Redação do artigo de revisão
Authors: Gusmão Sebastião Silva , Silveira Roberto Leal
Published: April 2019

Descrevem-se as orientações básicas para redação do artigo científico, tipo revisão, por meio da análise das diferentes partes ou seções desse tipo de trabalho. Abordam-se, também, o estilo da linguagem científica e os meios de pesquisa bibliográfica.