bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multiscale Analysis of Particle Size-dependent Steady Compaction Waves in Granular Energetic Materials
Authors: Zhang Xin-Ming , Wu Yan-Qing , Huang Feng-Lei 
Published: September 2015

Abstract
A multiscale model is used to analyze the compaction processes in granular HMX beds composed of different particle sizes (coarse particles, d=40 μm and microfine particles, d=4 μm). The localization strategy of Gonthier is extended to include changes in thermal energy induced by compression. The variation in yield strength caused by solid-liquid phase change is also considered. Analysis of the steady-state wave structure indicates that the compaction behavior of a porous material is dependent on particle size. For solid volume fraction φs < 0.88, the fine particle beds provide greater resistance to compaction than the coarse particle beds, and they propagate compaction waves that travel at faster speeds. When φs > 0.88, the physical state of the compacted bed has become very similar for the two materials. For subsonic compaction waves, the evolution of the grain temperature shows that large particles lead to large hot spots and high temperature and coarse particles are more shock sensitive at low shock pressures. For supersonic compaction waves, compression induced changes in thermal energy play an important role in localization strategy. It increases the localization sphere center radius. The dissipated energy is deposited over a larger localization volume so that the grain temperature near the intergranular contact surface is reduced significantly. The localization center radius further increases because of the decrease in the yield strength caused by solid–liquid phase change. Consequently, the peak grain temperature is reduced further.
Cavitation in Negative-pressure Microcapillary Devices with Tapered Constrictions: Experiment and Numerical Simulation
Authors: Yang Xing , Li Jiang , Chen Haosheng 
Published: September 2015

Abstract
Microcapillary devices with tapered constrictions were fabricated for the study of the features of the cavitation. The cavitation was induced by applying negative pressure at the outlet with opening the inlet to atmospheric pressure, and the experimental results show that the cavitation bubbles generated at the center of the tapered tip flow upstream and adhere on the wall near the orifice, which is explained by the recirculation flow according to the numerical simulation results. The desinent cavitation number keeps constant for a microcapillary device, and the device works in a negative-pressure system is more susceptible to the cavitation than that works in a positive-pressure system. In addition, the effect of the orifice size on the incipient cavitation number and the desinent cavitation number has been studied with five devices with different sizes of the orifices from 50 to 120 microns. Both the incipient and desinent cavitation numbers increase monotonely with the size of the orifice. These results may be helpful to the design of the geometries of the microfluidic devices for various applications.
ANALISIS DETERMINAN KEMISKINAN DI PROVINSI JAWA TENGAH
Authors: Puspita Dita Wahyu 
Published: September 2015

<p>This study aims to determine factors of poverty in the province of Central Java period 2008 to 2012. Central Java province was chosen because it has the second highest poverty level among 33 provinces in Indonesia. In this study, the factors that infl uence poverty are the numbers of population live in poverty, unemployment, Gross Regional Domestic Product (GDP) and literacy rate. The method used is the panel data regression. Panel data is the data that combines the time series and cross-section data. In this study, it is found that unemployment, GDP and total population have signifi cant aff ect on poverty in the province of Central Java.</p><p>Penelitian ini bertujuan untuk mengetahui determinan kemiskinan di provinsi Jawa Tengah periode 2008 sampai 2012. Dipilihnya Jawa Tengah karena dari 33 provinsi yang ada di Indonesia, Jawa Tengah merupakan provinsi dengan penduduk miskin terbanyak ke dua. Dalam penelitian ini faktor-faktor yang mempengaruhi kemiskinan di antaranya yaitu jumlah penduduk miskin, banyaknya pengangguran, Pendapatan Domestik Regional Bruto (PDRB) dan Angka Melek Huruf dan semua variable tadi dipilih periode 2008 sampai 2012. Metode penelitian yang digunakan yaitu metode regresi data panel. Data panel merupakan data yang menggabungkan antara data time series dan data cross-section. Dalam penelitian ini pula ditemukan bahwa pengaruh pengangguran, PDRB dan jumlah atau populasi penduduk Jawa Tengah signifi kan. Artinya berpengaruh pada kemiskinan di provinsi Jawa Tengah.</p>
THE EFFECT OF ALL-TRANS RETINOIC ACID (ATRA) AND ZINC SULPHATE SUPPLEMENTATION ON PERIODONTITIS
Authors: Hanafi Praptiwi 
Published: September 2015

<em>The study executed to know the effect of ATRA and Zn supplementations to periodontitis rat collagen treated with tetracycline.The experimental study with factorial design used 54 Wistar adult male rat. Periodontitis was resulted from porphyromonas gingivalis inoculation. Tetracycline 90 mg/kg and the supplementations were given for 7 days. Nine groups sample were randomly allocated. The independent variables were supplementation of ATRA 10; 5 mg/kg, Zn 2.5; 1 mg/kg, and their combinations. Dependent variable was collagen status i.e degradation and synthesis, consecutively measured by mRNA MMP-2 and mRNA P1CP, using reverse transcriptase polymerase chain reaction. Control was periodontitis group receiving tetracycline. T-test, ANOVA, Post Hoc Duncan and least significant differences (LSD) were used. High dose ATRA 10 mg/kg and Zn 2.5 mg/kg supplementations consecutivetly degraded (0.25 x of control) and increased collagen synthesis (4 x of control). High dose ATRA and Zn combined supplementation gave no effect to collagen degradation, but increased synthesis (3 x of control). The effect of high dose ATRA and Zn combined supplementation on collagen synthesis was the nearest to healthy condition.</em><br /><br /><br />Penelitian ini bertujuan untuk mengetahui pengaruh suplementasi ATRA dan Zinc pada kolagen jaringan periodontium tikus periodontitis yang mendapat tetrasiklin. Studi eksperimental dengan desain faktorial dilakukan pada 54 tikus Wistar jantan dewasa. Periodontitis dihasilkan melalui inokulasi porphyromonas gingivalis. Tetrasiklin 90 mg/kg dan suplementasi diberikan selama 7 hari. Sembilan kelompok sampel terpilih secara alokasi acak. Variabel bebas adalah suplementasi ATRA 10; 5 mg/kg; Zn 2,5; 1 mg/kg; dan kombinasinya. Variabel tergantung adalah status kolagen meliputi degradasi dan sintesis, indikator mRNA MMP-2 dan mRNA P1CP, terukur dengan reverse transcriptase polymerizing chain reaction. Kontrol adalah kelompok periodontitis dan mendapat tetrasiklin. Analisis data menggunakan uji t, ANOVA, Post Hoc Duncan, dan LSD. Suplementasi dosis tinggi ATRA 10 mg/kg dan Zn 2,5 mg/kg berturut-turut mendegradasi (0,25 x kontrol) dan meningkatkan sintesis kolagen (4 x kontrol). Kombinasi suplementasi dosis tinggi ATRA dan Zn tidak berefek pada degradasi kolagen, tetapi meningkatkan sintesisnya (3 x kontrol). Suplementasi kombinasi dosis tinggi ATRA dan Zn memberikan sintesis kolagen paling dekat dengan keadaan sehat.
PENINGKATAN KADAR TIMBAL DARAH DAN MUNCULNYA PERILAKU ANTISOSIAL PENGRAJIN KUNINGAN
Authors: Marianti Aditya , Anies Anies , Abdurachim Henna Rya Sunoko 
Published: September 2015

<p>Penelitian ini bertujuan mengkaji pengaruh peningkatan kadar timbal (Pb) darah terhadap munculnya perilaku antisosial pada pengrajin kuningan. Disain penelitian observasional analitik dengan studi cross sectional. Sampel terdiri dari 55 orang pengrajin kuni ngan, dengan kriteria inklusi pria atau wanita, minimal 17 tahun, telah bekerja di industri kuningan minimal 2 tahun, pendidikan minimal pernah SD. Hasil penelitian menunjukkan telah terjadi kontaminasi Pb di lingkungan kerja industri kuningan. Kadar Pb darah pengrajin yang melebihi nilai ambang batas40µg/dl mencapai 80%. Perilaku antisosial terukur masuk kategori sedang dan rendah. Terdapat hubungan linier antara kadar Pb darah dan perilaku antisosial dengan R2 0,353. Simpulan pajanan kronik Pb di lingku- ngan kerja industri kuningan menyebabkan peningkatan kadar Pb darah pengrajin dan berkontribusi memicu munculnya perilaku antisosial.</p><p> </p><p><em>This study aimed to examine the effect of increased Blood Lead Levels (BLL) results of the emergence of antisocial behavior in brass craftsmen. The research designs used the analytic observational with cross sectional study. The sample consisted of 55 brass craftsmen, male or female a minimum of 17 years old, has worked in the brass industry at least for 2 years, and at least has a degree in the elementary school level. The results showed that there has been a lead contamination in the environment of brass industry. BLL that exceed the threshold value (40 μg/dl) reached 80%. The antisocial behavior measured was in the category of medium and low. There was a linear relationship between BLL and antisocial behavior with R2 0.353. In conclusion, chronic lead exposure to the brass industry environment led to an increase to blood lead levels BLL in craftsmen contributed in the appearance of antisocial behavior.</em></p>
Practice-as-research: An example of the use of action research to link practice and theory in a case of Information Systems strategy development
Authors: Du Toit MJ , Lotriet Hugo 
Published: September 2015

The ability to link IS practice to a sound theoretical and scientific basis has been an ongoing endeavour for both IS practitioners
and researchers. This stems from the need of both practitioners and theorists to be able to ensure that the relationship between
practical knowledge and experience gained in the workplace can be grounded in theory with due consideration of the converse
requirement for theory to be based on practice. This paper provides an example of how Action Research (AR) was successfully
applied by a practitioner as method in a South African strategic IS management environment. The paper describes the specifics
of the process that was used and highlights various issues that had to be considered in this specific instance of use of AR as
method.
Assessing Macroscopic Dynamic Permeability Through Pressure and Noise Analysis
Authors: Aslanyan Arthur , Aslanyan Irina , Farakhova Rushaniya 
Published: September 2015

Abstract
One of the common applications of Pressure Transient Analysis and Pressure Pulse Testing is the evaluation of formation permeability that is referred to as dynamic permeability and is then used to calibrate permeability distribution from a geological model before running full-field flow simulations.
In practice, though, the correlation between permeability from pressure tests and that predicted from open-hole logs is often poor and does not provide consistent calibration because of many factors including poor core data, poor porosity-permeability, complex pressure transient responses and others. In many cases, inaccurate dynamic permeability values are due to misinterpretation of flowing thickness.
In this paper, we demonstrate how Spectral Noise Logging can pick the boundaries of actual flow units and enable the accurate determination of effective thickness to substantially improve the correlation between dynamic and open-hole permeabilities.
Modeling and History Matching of a Fractured Reservoir in an Iraqi Oil Field
Authors: Ali Diyar H. , Al-Jawad Mohammed S. , Van Kirk Craig W. 
Published: September 2015

Abstract
In recent years the interest in fractured reservoirs has grown. The awareness has increased analysis of the role played by fractures in petroleum reservoir production and recovery. Since most Iraqi reservoirs are fractured carbonate rocks. Much effort was devoted to well modeling of fractured reservoirs and the impacts on production. However, turning that modeling into field development decisions goes through reservoir simulation. Therefore accurate modeling is required for more viable economic decision. Iraqi mature field being used as our case study. The key point for developing the mature field is approving the reservoir model that going to be used for future predictions. This can be achieved via History Matching. The production of this field is mainly from fractures, and it showed unfavorable decline during the production life from 1952. Thus, well modeling is necessary for developing the field, including history matching.
This study employed a three-dimensional three-phase black-oil dual-porosity model by CMG-Builder/IMEX 2010 simulator using an Iraqi fractured, faulted reservoir model. History matching has been carried out to improve the model which was going to be used in the simulation study. Several modifications were required during the history matching, such as adjusting the vertical fracture permeability, the relative permeability, the aquifer properties, setting fault transmissibility, and the matrix and fracture compressibilities.
The results of the History matching showed excellent agreement between the simulation and the historical profile. Furthermore the recent validated data by history matching have been used for the Iraqi reservoir model by running the CMG/IMEX simulator.
Multi-scale Reservoir Characterisation from Pore Scale to Simulation Scale: Concepts and Workflows
Authors: Curtis Alan A. 
Published: September 2015

Abstract
A consistent framework for reservoir characterisation from the pore scale through to the reservoir simulation scale is presented. Concepts that clarify the characterisation problem are explained and the scales that are of most importance to applied reservoir characterisation are defined. Workflows are presented illustrating how both static and dynamic petrophysical properties may be moved from one scale to the next, and how the similarities and the differences in the procedures at each scale change are considered. Why a multi-scale approach involves more steps than just upscaling, as is often traditionally assumed, is explained and illustrations are given at various scales of what a comprehensive multi-scale approach entails. How the concept of model-prototype similitude can be used to overcome limitations in the characterisation workflow is introduced and then the details of its use to transfer saturation-dependent petrophysical properties to coarser scales are explained.
Developing Performance Estimates of the Heterogeneous Upper Sands of the Greater Burgan Field Using Part Field Models
Authors: Muhammad Y. , Ortegon L. R. , Ibrahim M. N. , Burman K. , Datta K. , Dashti L. , Bond D. J. 
Published: September 2015

Abstract
The Burgan Sand reservoir is the largest and most prolific reservoir in the Greater Burgan field in Kuwait. As development of this reservoir proceeds, greater attention is being paid to the more heterogeneous upper part of the reservoir, the Upper Burgan Sands, which contain significant, multi-billion barrel, resources. A conceptual Field Development Plan was developed to enable an assessment of performance under waterflooding.
Due to the complexity of the Upper Burgan Sands and the very large areal extent of the Greater Burgan field, it was considered impractical to model the reservoir in appropriate detail in the full field simulation model. An alternative modeling approach was adopted. This involved developing a number of part field geological models which were subsequently used to develop high resolution dynamic simulation models.
This paper describes the challenges of choosing an appropriate range of part field models that capture variation in geological characteristics and of hydrocarbon properties, conditioning these models to available dynamic data and accounting for the historical production.
Particular attention is paid to three problems. First, to rank the models in terms of key features that would be expected to govern reservoir performance. These included internal heterogeneity, average reservoir quality, connectivity to the underlying Middle Burgan Sands and variation in fluid properties. Second, to assign the selected models to represent different parts of the reservoir. Third, to ensure that historical performance, including water influx inferred from surveillance data, is accounted for in predicting future performance.
The estimates were determined by a hybrid formulation, combining an analytic and simulation approach, suited for rapid computations and multi-scenario generation. Simulation results of water-cut versus recovery have been integrated with standard analytic expressions for fully developed pattern waterfloods. Scenarios investigated include the determination of ultimate recovery, a phased out recovery according to production and sweep of lower intervals, sensitivities to drilling rate, and a waterflooding scheme prioritized on area production potential.
Based on the results from the part field models, performance estimates of the Upper Burgan Sands reservoir have been made. Volumes forecasts and associated well numbers have been predicted.
A new reservoir simulation and analytical formulation has been developed to enable rapid predictions of waterflood scenarios. The hybrid formulation has proved to be significantly faster, resulting in a much quicker turnaround time compared to a traditional simulation study.
Case study: Implementation of Waterflooding in Unconsolidated Thin Heterogeneous and Viscous Oil Sands in Romania. Integrated Approach
Authors: Chirkov Maxim , Gonzalez Jose 
Published: September 2015

Abstract
This paper presents the implementation of pattern water flood in a very complex field in Romania. It's a multilayer formation with thin 2-5 m highly permeable (up to 2 Darcy) unconsolidated sands and unknown fluid contacts. Additionally high mobility ratio (around 50) and unfavourable rock wettability complicate the water flooding process. Project considered different injection schemes like peripheral, line drive and pattern. Integrated approach includes depositional environment analysis, 3D seismic interpretation, acquisition of complex log to investigate current oil saturation, field injectivity tests, pilot water injection and intensive surveillance plan. Water injection is part of field redevelopment plan and will increase recovery factor by 7.3%.
Multi-Scale Rock Analysis for Improved Characterization of Complex Carbonates
Authors: Dernaika Moustafa , Uddin Yasir Naseer , Koronfol Safouh , Al Jallad Osama , Sinclair Gary , Hanamura Yasuaki , Horaguchi Keishi 
Published: September 2015

Abstract
The evaluation of carbonate reservoirs is a complex task because of the inherent heterogeneities that occur at all length scales. Rock properties may be defined differently at different scales and this introduces a challenge in capturing heterogeneity in a single rock volume. Heterogeneities at smaller length scales must be upscaled into larger scale volumes to better predict reservoir performance. The objective in this study is to define carbonate rock types at multiple scales and then upscale those rock types and associated properties to the whole core level.
Representative core plugs were selected in a heterogeneous reservoir interval based on statistical distribution of litho-types in the core. The litho-types were described by porosity and mineralogy variations along the core length using advanced dual energy XCT imaging. Plug-scale rock types were defined on the basis of petrophysical data and geological facies. High-resolution micro to nano XCT images were integrated in the rock typing scheme. Those rock types were upscaled to the whole core level by linking the core litho-types to the plug data.
The core litho-types (porosity and mineralogy) gave good representation of the whole core heterogeneity and were reliable for selecting representative samples. This allowed establishing the link between plugs and whole cores and hence upscaling rock type information to the whole core scale. The high-resolution digital images emphasized the different pore geometries in the samples and improved the definition of the rock types. Accurate porosity and permeability logs were derived along the core length and gave very good match with the plug data. Multi-scale porosity-permeability trends were investigated and found to have direct impact on the determination of upscaled permeability log at the whole core level.
The paper presents an advanced and quick tool for representative sample selection and statistical core characterization in heterogeneous reservoirs. The identified rock types at multiple scales provided new insights into carbonate heterogeneity and gave upscaling options for rock types and petrophysical data. The upscaled rock types at the whole core level enhance the prediction of dynamic imbibition data along the reservoir column for improved reservoir performance.
Regional Stress Rotation in Arabia; Implications for Hydrocarbon E&P in Abu Dhabi, UAE
Authors: Sirat Manhal 
Published: September 2015

Abstract
The main objective is to unravel the development of the fracture system within the hydrocarbon fields in the Onshore of Abu Dhabi, where an alternative understanding of the fracture system development in association with the counterclockwise rotation of the regional causative stress throughout the geologic time is introduced in this paper.
Manifestation of the tectonic history of Arabia in the UAE is demonstrated by both folding represented by gentle and open folds comprising most of Abu Dhabi's hydrocarbon structural traps and a brittle deformation represented by a fracture system comprising long en echelon seismic faults and several joint and vein sets. The most dominant, tens of kilometers long seismic faults in the Cretaceous rocks of Abu Dhabi are the N75W and N45W oriented faults, which have been considered so far as conjugate strike-slip faults. It is argued here whether these two seismic fault sets, which appear in many instances as conjugate sets, have been really developed coevally by a single tectonic event when the SHmax was approximately at 120°? The current understanding that these faults are strike-slip faults despite the absence of extensive horizontal displacements along them as shown on different time-slices is also discussed. Seismic attribute analysis and interpretation, outcrop analogs and fracture description from logs and FMIs reveal that this fracture system might have been developed in a more complicated manner than reported in different publications.
It is proposed here that the N75W seismic faults have been developed first as tensile fractures shortly prior to folding when SHmax oriented approximately at 120°. The N45W seismic faults have been developed at a later stage possibly as splay faults by reactivation/ branching from the preexisting N75W when the SHmax was approximately oriented E-W. This has occurred by a continuous counterclockwise rotation of the causative SHmax stress from Cretaceous to present. A periodic strike-slip movement along deep-seated basement faults could also have developed many structural features in the sedimentary cover including several hydrocarbon fields in the Onshore of Abu Dhabi.
The implications of the drift of the causative stress with geologic time from ∼120° to E-W, NE-SW and finally to NNE-SSW include its effect in reactivating the preexisting fracture system, tilting folds, and control fluid charge and movement within Abu Dhabi petroleum system. The significance of the results is the impact on exploration, production and field development plans. In the exploration of the new plays, both leads with their fractures can be predicted once the direction of the paleo-causative stress can be defined. In production and filed development planning, predicting the fracture system would help better production with appropriate well placement.