bluuebunny/crossref_metadata_2025_split huggingface dataset:
Maintaining Safety Performance in the Context of High Drilling and Completion Activities - A Lesson Learnt from More than 2 Years without LTI
Authors: Therademaker Ricky , Siswanto Agus , Hidayat Ramadhan 
Published: October 2017

Abstract
Company operated 7 rigs during the period on 2011 – 2016. The drilling and completion operation are categorized as offshore activities by using submerge swamp and jack up rigs. Approximately 100 wells were drilled with 4 million man hours in average within a year. The challenges are the high proportion of direct involvement of human resources with equipment and materials, turnover of personnel and various educational background levels of the workers. In 2014, there were 11 recordable injuries where 4 of them are Lost Time Injuries (LTI). Based on the incident analysis, the root causes are mainly related to inadequate supervision and leadership.
In order to enhance and maintain the safety performance, there are two categories of intiative i.e. HSE culture / communication in order to maintain personnel awareness on safetyAudits and inspection in order to monitor and control the operation
The Rig Action List (RAL) is monitored to ensure no compliance and conformity issues. The Drilling Manager performs regular reviews planning, action lists, objectives and targets as part of the HSE Management System implementation.
Well Construction (WLC) Division reached 2.5 years without Lost Time Injury (LTI). The safety performance record is an outstanding result, considering the magnitude of the drilling operation on site.
How to Solve High Water Cut Well Problem in Mature Oil Field, Case Study: Application of Modified Completion Fluid Treatment in WW D-29, WW H-12, II A-22 Wells
Authors: Afi F. N. , Gunawan H. , Widiatmo R. , Waskito L. B. , Nugroho P. , Luthfan M. , Prayogo R. , Suryana A. 
Published: October 2017

Abstract
Dealing with mature offshore oilfield has complicated problems both surface and subsurface. In the reservoir condition high water cut wells make some bad impact in the production stages. Liquid handling facilities, tubing pipeline erosion, broken sand control, and high power consumption are several problem caused by high water cut wells. WW is an offshore oil field which has developed since 1990s with OOIP 758 MMBO. This reservoir was divided into several layer, 33 series is depleted reservoir with water injection since year 2000s (RF 23%) and 35 Series has strong water drive as its driving mechanism (RF 56%). Almost 85% of the oil wells is producing with water cut more than 97%. Increasing water cut or even watered out phenomenon was frequently happen during production stage, some of this problem was happen after well intervention such as after pump replacement. This paper will show the successful case of decreasing water cut significantly from WW D-29, WW H-12, II A-22.
Laboratory test was firstly done to check the compatibility test of the rock with modified completion fluid. This chemical was mainly works as phase change water control and oil stabilize well for completion fluid. It was pumped simultaneously with regular completion fluid (filtered drill water and additives). Killing well was mandatory procedure when shut in wells will be repaired. GGR team supported by Production and Workover Team did integrated study to choose the chemical and well selection based on some criteria.
WW D-29, WW H-12, and II A-22 are wells which have implemented modified completion fluid treatment. Those wells are produced from sandstone reservoir and drilled more than 10 years ago. During production period, water cut was significantly jumped due to several reason, such as pump replacement job, re-start up after the well trip off, etc. The result of the project were very excellent, WW D-29 (from 98% to 86%, gain +/− 180 bopd), WW H-12 (from 80% to 40%, gain +/− 250 bopd) and II A-22 (96% to 75%, gain +/− 130 bopd). These result give a lot of impact of increasing oil production in WW Field.
This paper will elaborate how to solve the problem in offshore mature oil field special case for high water cut wells using modification of completion fluid treatment. We have succeeded increasing oil reserves.
Integration of Casing Wear in Casing Design and Stress Analysis Workflow
Authors: Soong Alfred , Arriffin Muhammad Faris , Rosland Habil Akram 
Published: October 2017

Abstract
An advanced stiff-string model used during casing wear simulation to evaluate the drillstring contact position at any given casing depth can reflect the actual downhole scenario more precisely. The model yields a more representative wall thickness reduction percentage along the casing string by estimating multiple groove positions at each cross section. The simulated casing wear severity is subsequently incorporated into tubular design calculations by amending critical dimensions for each stress criteria to represent the worn tubular operating limits. The integration process reduces the safety margin for the modeled loading conditions that the casing string is expected to withstand during the well's life cycle.
This paper highlights the different methodologies applied during casing wear simulation and discusses how to integrate the results into the casing design and stress analysis workflow to predict the critical failure mode for the investigated tubular string.
Trials of New Designs Lead to Optimized Bit Selection for Drilling through Hard Carbonates in South Mahakam
Authors: Fidiansyah Ardho , Noviasta Bonar 
Published: October 2017

Abstract
The intermediate phase on South Mahakam (SMK) field presented technical and economical challenges due to multiple bit runs, attributable to thick carbonates with Unconfined Compressive Strength (UCS) up to 30K psi. The typical phase is either 12-1/4" or 8-1/2", reaching 1600m long with 90% containing the carbonates. Initially, different configurations of 8-1/2" Polycrystalline Diamond Compact (PDC) bits with durability in mind were selected but failed to deliver performance with more than 1 run required. Poor post-run dull gradings were observed reflecting broken/worn out cutters, and even blades ring out.
A recent campaign on SMK introduced two new 12-1/4" bit designs. First, a Hybrid bit (Roller Cone – Fixed Cutter PDC) was selected following a positive global experience on hard formations. A second trial involved a PDC with a Conical Diamond Element profile in the secondary cutter row – aimed to deliver high loading point to fracture hard formations and ease drill out. Both designs managed to drill the section in 1 run and delivered record speed.
The Hybrid bit managed to deliver at an almost double Penetration Rate (14.9 m/hr) than previous runs. Its durability was however limited by the seal life of the Cone. During run, a real-time monitoring of parameters and Minimum Specific Energy (MSE) was performed to detect for failures. Despite the precautions, a seal was damaged and the bit was undergauged. A control trip was triggered eliminating the cost saved for drilling in 1 run.
Conversely, the PDC with secondary conical elements delivered higher performance (29.6 m/hr) with dull grading allowing for a re-run under the same conditions. The bit became the standard for SMK, continuously delivering the phase in 1 run, a saving of 5 days.
This paper will analyze the cause of the Hybrid bit damage and how parameters monitoring did not pick up failure signals. It will also highlight the success of the bit conical elements in terms of practicality and effectiveness for drilling hard carbonates in SMK.
Potential for recycling of suspended solids and nutrients by irrigation of tailwater from tailwater recovery systems
Authors: Omer A. R. , Moore M. T. , Krutz L. J. , Kröger R. , Prince Czarnecki J. M. , Baker B. H. , Allen P. J. 
Published: October 2017

AbstractWithin the Lower Mississippi Alluvial Valley, conservation practices are being utilized to mitigate nutrient loading to streams from agricultural landscapes. This study was conducted to determine the potential to use solids, phosphorus (P) and nitrogen (N) captured by tailwater recovery (TWR) systems for reuse onto production fields through irrigation applications. Seven TWR systems were assessed for seasonal changes in nutrient concentrations and application loads. Samples were collected every three weeks from 2013 to 2015 for seasonal analyses and weekly during the 2014 and 2015 growing seasons for nutrient load analyses. Water samples collected in spring contained greater concentrations of solids than samples collected in winter and summer. In addition, spring samples contained greater concentrations of nitrate–nitrite than samples collected in all other seasons, and spring samples also contained higher ammonium than summer and fall samples. Mean nutrient loads per hectare recycled onto the landscape for an irrigation season were 325.10 kg ha−1 solids, 0.86 kg ha−1 P, and 7.26 kg ha−1 N, with the N being 77% organic. TWR systems can be used to recycle solids, P and N onto agricultural landscapes through irrigation events; however, nutrient loads will not be sufficient to alter agronomic fertilizer recommendations.
Sorption of Cr, Pb, Cu, Zn, Cd, Ni, and Co to nano-TiO2 in seawater
Authors: Bożena Graca , Zakrzewska Danuta , Szymczycha Beata 
Published: October 2017

Abstract
In this study, the role of nanoparticles in complex aqueous matrices such as the Baltic Sea was investigated in batch-mode experiments in which titanium dioxide nanoparticles (nano-TiO2) were tested for their ability to remove heavy metals (Cr, Pb, Cu, Zn, Cd, Ni, Co) from multicomponent spiked and non-spiked Baltic Sea water. The experimental data were analyzed using different isotherms (Langmuir, Freundlich, Dubinin–Kaganer–Radushkevich (DKR)) and models (pseudo-first-order and pseudo-second-order models, the double-exponential model, and the Weber–Morris model). The equilibria and kinetic investigations showed that metal sorption to nano-TiO2 occurs in a two-step, multilayer process and that there is strong competition for sorption sites. The results of the DKR isotherm and dilution experiment indicated weak electrostatic bonds, except for Pb. The distribution coefficient values (1.8 × 103 to 2.8 × 105 ml g−1) were consistent with the good sorbent properties of nano-TiO2 and supported the use of the particles in seawater purification technologies. However, metal-enriched nano-TiO2 may also act as an effective carriers of metals to marine sediments, which could increase their availability to benthic organisms.
Industrial wastewater treatment with a bioelectrochemical process: assessment of depuration efficiency and energy production
Authors: Molognoni Daniele , Chiarolla Stefania , Cecconet Daniele , Callegari Arianna , Capodaglio Andrea G. 
Published: October 2017

Abstract
Development of renewable energy sources, efficient industrial processes, energy/chemicals recovery from wastes are research issues that are quite contemporary. Bioelectrochemical processes represent an eco-innovative technology for energy and resources recovery from both domestic and industrial wastewaters. The current study was conducted to: (i) assess bioelectrochemical treatability of industrial (dairy) wastewater by microbial fuel cells (MFCs); (ii) determine the effects of the applied organic loading rate (OLR) on MFC performance; (iii) identify factors responsible for reactor energy recovery losses (i.e. overpotentials). For this purpose, an MFC was built and continuously operated for 72 days, during which the anodic chamber was fed with dairy wastewater and the cathodic chamber with an aerated mineral solution. The study demonstrated that industrial effluents from agrifood facilities can be treated by bioelectrochemical systems (BESs) with &gt;85% (average) organic matter removal, recovering power at an observed maximum density of 27 W m−3. Outcomes were better than in previous (shorter) analogous experiences, and demonstrate that this type of process could be successfully used for dairy wastewater with several advantages.
Pharmacogenetics of Angiotensin-Converting Enzyme Inhibitors in Patients with Alzheimer's Disease Dementia
Authors: de Oliveira Fabricio Ferreira , Chen Elizabeth Suchi , Smith Marilia Cardoso , Bertolucci Paulo Henrique Ferreira 
Published: October 2017

Background:
While the angiotensin-converting enzyme degrades amyloid-β, angiotensinconverting
enzyme inhibitors (ACEis) may slow cognitive decline by way of cholinergic effects, by increasing
brain substance P and boosting the activity of neprilysin, and by modulating glucose homeostasis
and augmenting the secretion of adipokines to enhance insulin sensitivity in patients with Alzheimer’s
disease dementia (AD). We aimed to investigate whether ACE gene polymorphisms rs1800764
and rs4291 are associated with cognitive and functional change in patients with AD, while also taking
APOE haplotypes and anti-hypertensive treatment with ACEis into account for stratification.

Methods:
Consecutive late-onset AD patients were screened with cognitive tests, while their caregivers
were queried for functional and caregiver burden scores. Prospective pharmacogenetic correlations were
estimated for one year, considering APOE and ACE genotypes and haplotypes, and treatment with
ACEis.

Results:
For 193 patients, minor allele frequencies were 0.497 for rs1800764 – C (44.6% heterozygotes)
and 0.345 for rs4291 – T (38.9% heterozygotes), both in Hardy-Weinberg equilibrium. Almost 94% of
all patients used cholinesterase inhibitors, while 155 (80.3%) had arterial hypertension, and 124 used
ACEis. No functional impacts were found regarding any genotypes or pharmacological treatment. Either
for carriers of ACE haplotypes that included rs1800764 – T and rs4291 – A, or for APOE4- carriers of
rs1800764 – T or rs4291 – T, ACEis slowed cognitive decline independently of blood pressure variations.
APOE4+ carriers were not responsive to treatment with ACEis.

Conclusion:
ACEis may slow cognitive decline for patients with AD, more remarkably for APOE4-
carriers of specific ACE genotypes.
Adnexal Masses in Premenopausal Reproductive Age Women
Authors: Liwan Henny , Hong Steve 
Published: October 2017

Background:
Adnexal masses in premenopausal women are common reason for referral
to OB-GYN. The etiologies vary from non-gynecologic to gynecologic. Once the mass is determined
to be gynecologic in its origin, the gynecologist needs to predict if the mass is more likely to
be benign or malignant which could lead to a diagnostic dilemma.

Objective:
This article reviews different histologic type of ovarian tumors, its epidemiology, clinical
presentation, imaging appearance and ovarian tumor markers. Familiarity with these patterns
will help the clinician narrow the differential diagnosis thus facilitating further management.

Results:
The incidence of malignancy increases with age. Vast majority of adnexal masses that are
ovarian in etiology, 90.5% are benign. The first line imaging is usually a pelvic ultrasound. There
are imaging characteristics that could assist in categorizing a mass as more likely to be benign or
suspicious for malignancy. Furthermore, there are tumor markers that are approved by FDA to be
used as tools to evaluate adnexal masses.

Conclusion:
Adnexal masses in the reproductive age group demonstrate the greatest histologic
variance that is mostly benign. Clinical judgement is important to predict if a mass is likely to be
benign or malignant based on risk factors, imaging appearances, and tumor markers. If suspicion of
malignancy is high, referral to a gynecologic oncologist is warranted as this may improve patient’s
survival.
Overview of the Chromatographic and Mass Spectrometry Analytical Methods for Determination of Lamivudine in Biological Fluids
Authors: Chen Xuwang , Bu Fanlong , Li Rong , Yuan Guiyan , Wang Yanyan , Wang Benjie 
Published: October 2017

Background:Lamivudine was approved by Food and Drug Administration of the United States for the treatment of both HIV and HBV infection, which has been widely used as monotherapy or a component of combination therapy in clinics in many countries and nationalities.Methods:In this paper, the recent chromatographic and mass spectrometry analytical methods for the determination of lamivudine individually or combination with other drugs simultaneously were presented. These methods were widely applied in pharmacokinetics studies, bioequivalence studies, therapeutic drug monitoring studies, cell and animal experiments.Conclusion:The review paper might provide references for determining lamivudine in biological fluids, the intracorporal process of lamivudine, and the clinical practice by monitoring plasma concentration of lamivudine in the future.
The Introduction of Emotion Coaching as a Whole School Approach in a Primary Specialist Social Emotional and Mental Health Setting: Positive Outcomes for All
Authors: Gus Licette , Rose Janet , Gilbert Louise , Kilby Ryan 
Published: October 2017

Background:This paper describes the impact upon well-being of pupils, staff, and families following the introduction of Emotion Coaching as a whole school approach.Objective:This paper’s objective is an attempt to redress the lack of published evidence about the use of Emotion Coaching in schools and to highlight how a school has been able to adopt a humanistic relational approach in a climate in which behaviorist principles are dominant in schools.Method:A case study approach using mixed methods was used. Data were examined from an outcomes model perspective where the benefits and changes intended from Emotion Coaching were the starting point. Perspectives from pupils, staff, and families were gainedviainterviews and structured questionnaires alongside quantitative measures of pupil academic progress and staff and pupil behavior.Results:Results indicate that Emotion Coaching improved the pupil’s ability to regulate their feelings and had a positive effect upon teacher-pupil relationships. Family-school relationships were supported by the school’s use of and modeling of Emotion Coaching with families and the ethos of attunement and non-judgemental interactions implicit in Emotion Coaching. Emotion Coaching promoted an increase in shared emotional language and trust. Shared emotional language and trust were key in the development of both teacher-pupil and family-school relationships. There was an improvement in well-being in that: rates of pupil restraint decreased, pupils made better than expected academic progress, staff absenteeism reduced, and families reported improved family life.Conclusion:We conclude that Emotion Coaching contributes to the promotion of sustainable, holistic improvement in wellbeing for pupils, school staff, and families.
How Are We Doing?: Family-School Relationships and Children With Reactive Attachment Disorder
Authors: Taft Raol J. , Schlein Candace 
Published: October 2017

Background:Students with Reactive Attachment Disorder (RAD) might benefit academically, socially, behaviorally, and emotionally from the establishment of effective, collaborative partnerships between home and school. Enhanced family interactions with schools might prove to promote positive outcomes in both home and school settings.Objective:In this article, we examine the level and quality of home and school participation between parents of children with RAD and school professionals within the context of the principles of effective partnerships: communication, professional competence, respect, commitment, equality, advocacy, and trust.Method:This study employed a qualitative methodology utilizing the narrative inquiry research tradition. In particular, we employed a semi–structured interview method, which allowed us to ask clarifying questions, further probe specific responses, and provide participants with an opportunity to elaborate on their stories of experience if they so desired.Results:Using Turnbullet al.'s(2015) seven principles of effective partnership, data from this study indicated that for these parents, families were not allowed to participate as equal partners, if at all, in the educational process.Conclusion:Results suggested that interactions with education professionals were often non-productive or adversarial and family input was often ignored. Effective partnerships were minimal to non-existent.
Targeted identification of adverse events in coronary artery disease patients based on patient-reported outcomes
Authors: Heiskanen Jari , Tolppanen Anna-Maija , Martikainen Janne , Hartikainen Juha , Miettinen Heikki , Hippeläinen Mikko , Roine Risto P 
Published: October 2017

Aim:
Can focusing the adverse events search to patients with poor patient-reported outcome help in targeting adverse event detection?
Patients & methods:
Coronary artery revascularization patients of the Kuopio University Hospital from June 2012 to August 2014 categorized into those with clinically significant improvement (15D score change ≥0.015, n = 81) or deterioration (change ≥-0.015, n = 64) in post-intervention health-related quality of life.
Results:
Major complications (27 vs 9%, p = 0.004) or post-intervention infections (16 vs 5%, p = 0.031) were more common among those with deteriorated score. They also tended to have more cardiovascular (19 vs 9%, p = 0.071) and minor complications (16 vs 7%, p = 0.118).
Conclusion:
Patient-reported outcomes may potentially help in targeting the adverse events search so that a larger number of adverse events can be identified for efficient learning from them.
PERBEDAAN PENGARUH MODEL STUDENT TEAMS ACHIEVEMENT DIVISION (STAD) DAN NUMBERED HEADS TOGETHER (NHT) TERHADAP HASIL BELAJAR MATEMATIKA SISWA KELAS V SD
Authors: Halimah Nur 
Published: October 2017

<p>This study aimed to determine the significance of the influence differences between the use of Student Teams Achievement Division (STAD) model and Numbered Heads Together (NHT) model on the 5th grade mathematics learning outcomes in SD Negeri Sumberejo 01 and SD Negeri Sumberejo 02. The type of research used was a quasi experiment with an unpredictable Pretest Posttest design. The subjects of the study were students of grade 5 in SD N Sumberejo 01 as experimental class 1 and grade V SD N of Sumberejo 02 as experiment class 2. The variables in this study consisted of independent variables, namely Student Teams Achievement Division (STAD) model, Numbered Heads Together (NHT) model and dependent variable was learning outcome. Data collection was done by test technique. The data analysis technique used T test with <em>Independent T test Sample</em> applied to posttest value. Result of t test of posttest value of experiment group 1 and experiment group 2 showed that the value was in significance 0,019 ˂ 0,05, because the significance ˂ 0,05 hence Ho rejected and Ha accepted with conclusion there was significant difference between the model of STAD and NHT to the result of learning of mathematics at student grade 5 in SD Negeri Sumberejo 01 and SD Sumberejo 02. The significant difference in mathematics learning outcomes was supported by the difference average of two research samples, where the average of learning outcomes on the application of STAD learning model was 77.89, While the average of learning outcomes on the application of NHT learning model was 85.53. This meant that the learning treatment with NHT model has different significant impact compared to the STAD learning model on mathematics learning outcomes of grade 5 SD Sumberejo 01 and SD N Sumberejo 02 Semester II of 2016/2017academic year.</p><p><strong>Kata Kunci</strong> : <em>Student Teams Achievement Division</em> (STAD), <em>Numbered Heads Together </em>(NHT), Learning Outcomes, Mathematics, 5<sup>th </sup>grade primary school students</p>