bluuebunny/crossref_metadata_2025_split huggingface dataset:
A study of the validity and reliability of the questionnaire entitled “physicians' approach to and disclosure of medical errors and the related ethical issues
Authors: Mohammadi Mohammad , Larijani Bagher , Tabatabaei Seyed Mahmoud , Nedjat Saharnaz , Yunesian Masud , Sadat Nayeri6 Fatemeh 
Published: May 2019

Medical errors are among the major challenges that threaten patients’ health worldwide. The aim of this study was to design a valid and reliable questionnaire to investigate the status of medical error disclosure by physicians.
A preliminary questionnaire was developed based on the extracted results from 37 interviews with specialists. To test the validity of the questionnaire, 20 medical practitioners and medical ethics authorities were asked to evaluate the relevance and clarity of each item. To measure the instrument’s reliability (the intra-class correlation coefficient and Cronbach’s alpha), a test-retest study was conducted on 20 randomly selected physicians twice with a 2-week interval. Statistical analyses were performed using SPSS software version 20.
The overall relevance and clarity of the instrument, with an average approach, were measured at 97.22 and 94.03 percent respectively. The Cronbach’s alpha, which presents the internal consistency was satisfactory (0.70 - 0.79) for various domains of the questionnaire. The range of intra-class correlation coefficients for the items in all domains of the questionnaire was 0.76 to 1.00.
Regarding the validity and reliability of the questionnaire, it can be an appropriate instrument in the assessment and monitoring of the status of medical error disclosure by physicians.
Effect of Employee Demographic Characteristics and Family/Work Conflict on Organizational Commitment Among the Police Officers in Nakuru County, Kenya.
Authors: Kipkebut Dr. Dinah J. , Lekaram Esther 
Published: May 2019

This paper examines the demographic characteristics and related variables on family/work conflict among the Police Officers in Nakuru County, Kenya. The participants were from eight (8) Police Division and a simple random sample of 170 was derived from a total number of 278 Officers. The level of conflict that employees perceive between their working and personal lives on organizational commitment was based on their personal characteristics which included: gender, marital status, age, level of education, tenure and number of hours worked among the police officers. The report suggested that the biographical personal characteristics suggested that those who participated there were more male officers compared to the female gender. The results showed that more female police officers experienced more stress than men which spill into their work due to the multiple roles they play as wives, mothers, care givers, family career as well as employees. The results are discussed in terms of marital status, level of education, tenure of service and numbers of hours worked per day on how they influence organizational commitment among the police officers in Nakuru County, Kenya
DEVELOPING STUDENTS LEARNING ATTRIBUTES THROUGH COLLABORATIVE LEARNING BASED ON FLIPPED CLASSROOM
Authors: Suwito S , Hamdani Akhmad Faruq 
Published: May 2019

Educators and education practitioners should be able to respond educational shift by modify paradigm of learning in the classroom. The problem that frequently emerge were the lack of conceptual and practical understanding, experience sharing among the students, as well as spirit of collaboration in learning. The purpose of the study was to build and develop students’ learning character through collaborative learning based on flipped class. The study was done in the framework of lesson study, using three steps (plan, do, and see). The technical steps included socialization, identifying problem, designing learning process, implementation, evaluation and reflection, and follow up. The result showed that collaborative learning based on flipped classroom was effective in developing the spirit of cooperation, honesty, discipline, and openness as it prioritized on the ability to cooperate with the others. There were some obstacles regarding time and class size in conducting lesson study.
Keywords: Collaborative Learning, Flipped Classroom, Learning Attributes.

References
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Copyright (c) 2018 Geosfera Indonesia Journal and Department of Geography Education, University of Jember
This work is licensed under a Creative Commons Attribution-Share A like 4.0 International License
Advancing High-Temperature ESP Technology for SAGD Applications
Authors: Caridad Jose , Shang Song 
Published: May 2019

Abstract
A new high-temperature electric submersible pump (ESP) system was introduced in 2017 that is designed to address documented failure mechanisms and improve system reliability for steam-assisted gravity drainage (SAGD) operations at 250°C. A closed-loop product improvement workflow based on equipment dismantle, inspection and failure analysis (DIFA) has significantly driven high-temperature ESP technology development and reliability. In this paper, the authors discuss the unique closed-loop design workflow, present the new engineering features to address the identified failure modes, review field results and demonstrate the positive effects of the design modifications by comparing reliability trends based on nearly 150 field installations of the new generation equipment.
High-Speed High-Rate Slim ESP Development and Qualification Testing
Authors: Lastra Rafael , Xiao J. J. , Lee Woon , Radcliffe Alan 
Published: May 2019

Abstract
Electrical Submersible Pumping (ESP) is the most suitable artificial lift method for producing high flow rates, however, there are shortcomings with the standard ESP technology in slim well applications. On the one hand, well production is often curtailed due to pump performance limitations and on the other hand, long strings and tight clearances make the current slim ESP systems more prone to failure when compared with larger diameter ESP applications.
This paper discusses the development and qualification of a new type of High-speed High-rate Slim ESP system that can be installed inside liners as small as 4 ½" and that is able to produce twice the rate of standard ESP technology. This new technology is also designed to increase both performance and reliability of the system.
There are many challenges associated with the development of an ESP able to produce high rates in small diameters; this paper discusses mechanical and hydraulic considerations and the evaluation of trade-offs between efficiency, rotational speed and production rate, among others. This paper also discusses the testing and qualification plan, as well as the results obtained during the factory acceptance testing phase.
ESP Technology Improvements in Peregrino Field
Authors: Castro Vinicius , Pastre Luiz , Marins Jean 
Published: May 2019

Abstract
Peregrino is a Brazilian offshore field which has been operated by Equinor since 2011. The fields crude oil viscosity ranges from 129 to 364 cp and the API gravity varies between 13° and 15° API. Electrical Submersible Pumps (ESP's) were selected as the Artificial Lift method to produce the heavy oil from Peregrino. The ESP equipment design has been modified throughout the years to address various failure modes, therefore improve system reliability by adapting customized solutions. This paper describes in detail the ESP application and solutions implemented in the field to overcome those challenges.
Every ESP string pulled from Peregrino is dismantled and inspected and this paper will discuss the routines used to conduct failure analysis and continuous improvement.
The main challenge with the ESP operations in Peregrino has been asphaltene precipitation in the seal sections and emulsion formation. Emulsion instabilities cause pressure, temperature and electrical current fluctuations, which increase stress in downhole equipment. This paper will discuss how the ESP equipment in Peregrino has been improved to meet the various challenges, an overview of the following equipment changes will be discussed:Packer penetratorPump diffusersESP MotorNew Seal construction
An overview of the ESP equipment reliability spanning the lifetime of Peregrino's operations will also be described in this paper.
Analyzing SAGD Producer Flow Instability and ESP Deterioration Using Dynamic Flow Simulations: A Field Case Study
Authors: Shang Song , Nascimento Carlos , Gomez Bustamante Nicolas , Graham John , Babatunde T. K. 
Published: May 2019

Abstract
High-temperature electric submersible pumps (ESPs) are the most commonly used artificial lift method in steam-assisted gravity drainage (SAGD) wells. While conceptually the SAGD process should provide a low-viscosity single-phase flow to the ESP system, changing pressures and temperatures associated with well drawdown create opportunities for introduction of free gas, water vapor, or both, resulting in multiphase flow regimes. This can often lead to wellbore flow instability and ESP performance deterioration.
An innovative approach to understanding ESP performance in multiphase flow conditions in SAGD production wells was developed by Shang, S. and Gomez-Bustamante, N. (2017), using well-specific fluid PVT characteristics to create the produced mixture's phase envelope. This analytical approach is able to identify phase boundaries, determine gas-water vapor volume fraction (GWVF), and predict flow regimes as a function of surface and downhole flowing measurements.
In this case study, the authors extend the modeling work done by Shang, S. and Gomez-Bustamante, N. (2017) with the objectives of constructing a wellbore model that includes the complex downhole completion, conducting transient analysis of the entire wellbore, analyzing slugging characteristics both upstream and downstream of the ESP, and ultimately providing operational recommendations to maximize well drawdown while maintaining wellbore stability.
Piloting a Cohelical-Axial Multiphase ESP Design in a Sandstone Reservoir Where Rod Pumping Failed
Authors: Dunn Patrick , Harris Dennis 
Published: May 2019

Abstract
Many McKittrick California wellbores are mature with a long reserve life. Original slotted liner gravel pack completions have eroded over time to pose a production threat. Sand enters the rod pumps and sticks the plungers. Additionally, conventional rod pumps on deep wells suffer more frequent rod parting events due to deviation and rod stretch, and CO2-mediated corrosion accelerates rod and tubing wear failures. The result is that rod pumps on this field's 3000+ feet deep, light oil sandstone wells have very poor reliability and require costly rig interventions to service. Enter the Cohelical-Axial Multiphase Pump (CHAMP) for ESP solution - a multiphase pump design to handle sand issues most centrifugal pumps cannot. Developed with assistance from Chevron Energy Technology Company through a joint industry project (JIP), the CHAMP-ESP is versatile to move high rate fluids with high sand/high gas/high viscosity content. This paper examines a case-study application to highlight the technical and economic challenges to keep these problematic old wells actively producing with the CHAMP-ESP concept. CHAMP and CHAMP-ESP are not trademarked names but rather acronyms created by the authors to facilitate understanding of the pump type and ESP system.
Formation of saponite by hydrothermal alteration of metal oxides: Implication for the rarity of hydrotalcite
Authors: Tao Qi , Zeng Qingjin , Chen Manyou , He Hongping , Komarneni Sridhar 
Published: May 2019

AbstractConversion of hydrotalcite (Ht) to saponite was observed by hydrothermal alkaline alteration of metal oxides. The conversion was through a pathway of hydration-dissolution-precipitation. It involved several critical steps, including the construction of Ht from metal oxides, dissolution of Al3+ from Ht, condensation of metasilicate anions with Ht, and finally crystallization of saponite. The condensation was favored by relatively low Mg/Al ratios of Ht, along with high concentrations of Al3+ and silicate oligomers in the environment, resulting in highly crystalline saponite. The latter conversion was greatly accelerated by the isomorphous substitution of Al3+ for Si4+ in silicate oligomers. The substitution generated the extra negative charge and led to the aforementioned condensation with Ht surface, thereby promoting the formation of saponite TOT layers. During the process, CO2 is an indispensable component. Initially intercalated as CO32− to form Ht, CO2 was subsequently eliminated from the solid phase, and saponite formed when the layer charge was reversed. Thus, this study presents a novel formation mechanism of saponite from metal oxides via hydrotalcite and contributes to a better understanding of the crystallization, chemical stability, and transformation of Ht to saponite. The results are also relevant to evaluating metal availability and carbon cycling on the surface of the Earth.
ANTI-CANCER POTENTIAL OF POLYSACCHARIDE ISOLATED FROM METHANOLIC EXTRACT OF TINOSPORA CORDIFOLIA STEM BARK
Authors: LUDAS ANTONY , INDU SABAPATHY , HINDUJA SEKAR , NIRMALA ANTHONISAMY KUMARI , RAJALAKSHMI MANIKKAM 
Published: May 2019

Objective: The exploration of the anticancer potential of polysaccharide isolated from the methanolic extract of Tinospora cordifolia (T. cordifolia) stem bark against breast cancer in DMBA-induced female albino Wistar rat models were examined by various hematological parameters.
Methods: Analysis of Red blood cell (RBC), White blood cell (WBC) and platelet level, Tumor markers Carcino Embryonic Antigen (CEA) and Cancer Antigen 15.3 (CA 15.3) in the serum, was done in the normal, cancer and compound treated rats using specific kits. Histological studies were performed to examine the changes in the tissue morphology and cell patterns in breast tissue.
Results: The decreased levels of RBC, WBC and platelets in 7,12-Dimethylbenz [a] anthracene (DMBA)-induced breast cancer (Group III) animals were revived to the normal conditions in polysaccharide treated breast cancer (Group IV) animals as that of normal (Group I). The level of tumor markers CEA and CA 15.3, was found elevated in serum of DMBA-induced breast cancer groups (Group III) when compared to their levels in the normal groups (Group I) whereas polysaccharide treatment (Group IV) prevented this rise in the levels of tumor markers. The histological studies on the breast tissue samples of all the groups showed the appropriate features where the normal (Group I) animals were characterized with normal cells uniformly arranged without any change in orientation and morphology, DMBA-induced cancer (Group III) animals showed an improper orientation of cells arranged as glandular structures, as nest, or cords of various sizes or as solid sheets foci of necrosis in some areas with margins infiltrating, pushing, circumcised or mixed and the polysaccharide treated (Group IV) animals showed results resembling that of the normal (Group I) animals.
Conclusion: Thus, polysaccharide is proved as an effective chemo preventive agent against breast cancer.
THE INFLUENCE OF AERATED DRINKS ON THE BLOOD PRESSURE AND HEART RATE OF YOUNG ADULTS
Authors: Shetty Somashekar , DASS NITHYA ANTHONY 
Published: May 2019

Objective: To study the relationship of aerated drink (soft drink) consumption on the blood pressure and heart rate of student population.
Methods: 50 medical students (25 male and 25 female) volunteered to participate in this study. The blood pressure and heart rate of the student was taken and recorded as initial blood pressure (pre-test, control). The student was then given 250 ml of aerated drink. After 20 min* the blood pressure (BP) and heart rate of the student was taken once again (post-test) and the reading was recorded.
Results: The statistical analysis suggest that, there was 0.88±0.10 mm/Hg increase in the mean arterial pressure, subsequent to the consumption of the aerated drink in the male student population and 2.85±0.18 mm/Hg in the female student population. Similarly, 0.76±0.03 beats/minute increase in the heart rate in male population and 1.2±0.05 beats/minute was observed in female population.
Conclusion: In our study aerated drink have not shown a significant effect on mean arterial pressure and heart rate in both males and females. Chronic consumption may have the effect on mean arterial pressure and heart rate but random consumption may not have significant effect.
THE IMPROVEMENT OF BETULIN-3, 28-DIPHOSPHATE WATER-SOLUBILITY BY COMPLEXATION WITH AMINES–MEGLUMINE AND XYMEDON
Authors: Melnikova Nina , Malygina Darina , Panteleev Dmitry , Vorobyova Olga , Solovyeva Anna , Belyaeva Kseniya , Klabukova Irina 
Published: May 2019

Objective: To study betulin-3,28-diphosphate (BDP) water solubility improved by forming salt complexes with hydrophilic amino alcohols: meglumine as acidosis corrector and xymedon as the water-soluble antioxidant.
Methods: We used 13C-, 31P-NMR, UV-spectroscopy and potentiometric titration to study the BDP-amine salt complexes formation and their solubility using HPLC-analysis.
Results: The participation of xymedon in the proton transfer reaction with BDP in aqueous solutions was confirmed by the bathochromic shift of the carbonyl band from 299.1 nm to 304.2 nm, and by a hyperchromic effect (molar extinction ε from 8508 to 10 441 l·mol-1·cm-1) in UV-spectra. BDP complexation with meglumine was estimated by UV-spectral molar ratio method at 256 nm. Molar ratio of BDP-amine complexes (1:4) was proved by 31P-NMR. The chemical shift of phosphorus at C-3 atom of BDP (δ =-0.58 ppm) changed to+3.39 ppm, and at C-28 atom (δ =+0.28 ppm)–to+4.60 ppm. BDP solubility increased 100-600 fold according to HPLC-analysis.
Conclusion: BDP interaction with amine in an aqueous solution was shown to proceed via a proton transfer due to relatively weak forces such as London forces, hydrogen bonding, electrostatic and hydrophobic interactions. In general, the formation of BDP salt complexes with amines in solution determines BDP water solubility. Water-soluble BDP enables to develop hydrophilic dosage forms.
Analisis Kinerja Guru dengan Metode Rough Set (Studi Kasus di SMA Pondok Pesantren Modern Nurul Ikhlas)
Authors: Aditama Handika 
Published: May 2019

<p>Penelitian ini bertujuan untuk menentukan kinerja guru pada Sekolah Menengah Atas (SMA) Pondok Pesantren Modern Nurul Ikhlas. Pada penelitian ini digunakan pendekatan data mining dengan metode rough set. Metode rough set merupakan salah satu algoritma yang terdapat pada data mining yang bertujuan untuk menemukan suatu pengetahuan baru. Hasil dari penelitian ini didapatkan suatu bentuk pengetahuan baru berupa prestasi guru. Penelitian ini sangat bermanfaat bagi pihak yayasan untuk menentukan guru terbaik.</p><p> </p>
Differential Interpretations and Earnings Quality
Authors: Abdel-Meguid Ahmed M. , Fernando Guy D. , Schneible Richard A. , Suh SangHyun 
Published: May 2019

SYNOPSIS
We investigate the association between earnings quality and investor disagreement regarding the valuation consequences of earnings announcements. A primary purpose of financial reporting, including periodic earnings releases, is to convey useful information to investors. However, earnings may be of low quality due to an inherent failure in the accounting process to accurately represent the economic entity, unintentional errors, or intentional manipulation on the part of management. We argue that low-quality earnings will be associated with more divergent opinions regarding the implication of the earnings signal (i.e., differential interpretations) and, thus, be reflected in their trading activity. We use two abnormal accrual measures and an earnings persistence measure as proxies for earnings quality. We proxy for differential interpretations using abnormal trading volume unrelated to returns and analyst forecast jumbling. Our results show that low earnings quality is associated with more differential interpretations of earnings announcements measures.
¿Qué es WONCA?
Authors: Cabezas Carmen Elena 
Published: May 2019

Sabían que WONCA es World Organization of Family Doctors y es el nombre corto de la World Organization of National Colleges, Academies (WONCA) and Academic Associations of General Practitioners/Family Physicians, es la organización internacional que reúne las universidades, academias y asociaciones interesadas en la práctica de la medicina general (o de familia). La WONCA fue fundada en 1972 con 18 miembros, en la actualidad cuenta con más de 120 organizaciones de 131 países. La WONCA es una organización afiliada a la Organización Mundial de la Salud (OMS).
Editorial
Authors: Herrera Diego 
Published: May 2019

En el Ecuador se producen periódicamente terremotos desde que se tiene memoria, el de mayor magnitud fue en 1797, tuvo una magnitud de 8,3, y provoco la destrucción total de Riobamba, con daños en todo el centro del país. Desde que funciona el Instituto Geofísico se han registrado más de 20 terremotos en los últimos 100 años, el último fue en abril del 2016 sismo de 7. 8 de magnitud, que afecto las provincias de Manabí y Esmeraldas
TINGKAT PENGETAHUAN DAN PENGGUNAAN OBAT TRADISIONAL DI MASYARAKAT: STUDI PENDAHULUAN PADA MASYARAKAT DI DESA HEGARMANAH, JATINANGOR, SUMEDANG
Authors: Pratiwi Rimadani , Saputri Febrina Amelia , Nuwarda Rina Fajri 
Published: May 2019

Banyak masyarakat yang menggunakan obat tradisional baik untuk pengobatan maupun perawatan. Secara umum, obat tradisional yang dikenal masyarakat adalah jamu. Dalam perkembangannya, ada produsen yang menambahkan bahan kimia obat (BKO) ke dalam jamu. Penelitian ini dilakukan sebagai studi pendahuluan untuk mengetahui tingkat pengetahuan dan penggunaan obat tradisional di masyarakat. Data diperoleh dari 34 responden dan hasilnya menunjukkan bahwa 88,2% masyarakat mengenal jamu, 29,4% mengetahui obat herbal terstandar dan hanya 3% yang mengetahui fitofarmaka. Walaupun mayoritas masyarakat mengenal jamu, hanya 17,6% yang mengetahui kalo ada jamu yang ditambahkan BKO. Hasil ini dapat berkorelasi dengan dengan tingkat penggunaan obat tradisional di masyarakat, karena hanya 20,5% yang mengkonsumsi jamu. Hasil studi pendahuluan ini menunjukkan bahwa perlunya pemerataan dan penyampaian informasi secara langsung kepada masyarakat agar masyarakat dapat lebih memahami dan berhati-hati. Kata kunci: obat tradisional, jamu, bahan kimia obat, kuisioner