bluuebunny/crossref_metadata_2025 huggingface dataset:
The development of Bio-Gamyx module for teaching and learning Biology
Authors: Mohd Shapri Nur Izwani , Che Ahmad Che Nidzam
Published: November 2020

The aims of this study were to develop and validate Bio-GamyX module in teaching and learning Biology for form four students. This module was developed for the topic Chemical Composition of the Cell based on the integration of Sidek and Jamaludin’s Model and the Five Steps of Applying Gamification in Education proposed by Huang and Soman. The process of developing this module involved the preparation of module draft, experts’ reviews and calculation of content validity of the module. During this process, the module draft was given to three subject matter experts consist of academicians and practitioners to be reviewed. Several recommendations were identified and amendment was done accordingly. The amended module was then evaluated for its content validity. The percentage of experts’ agreement obtained for this module ranged from 77% to 85%. This finding shows that Bio-GamyX module has a good content validity. This finding reinforces the use of gamification approach in the design of teaching and learning modules specifically in Biology subject.
ANALISIS PENGARUH MUSYAWARAH TERHADAP KINERJA PEGAWAI DI PT. TALIATI TELAGA TANJUNG
Authors: Asy-Syathori Muhammad Arif , Kurniawati Denny , Sukarni Sukarni
Published: November 2020

Perusahaan startup atau rintisan selalu menghadapi ketidakpastian yang sangat ekstrem. Itu masalah bagi semua perusahaan startup di mana pun. Oleh karena itu, perlu adanya sebuah trobosan berupa tool atau alat dalam organisasi untuk menyelesaikan setiap permasalahan yang ada: Musyawarah.Musyawarah adalah kata yang sering didengar dan terdapat dalam banyak literasi. Bahkan, musyawarah telah tertuang dalam ayat Al-Qur’an. PT. Taliati Telaga Tanjung adalah perusahaan rintisan yang didirikan oleh tiga pendirinya; Ir. Dzoharul Arifin Alfaqiri (Kiai Tanjung), Susiana Rahmawati, dan Irawan Arifianto WW. Perusahaan ini menerapkan musyawarah untuk menyelesaikan permasalahan yang timbul. Berdasar hal itu, Penulis ingin tahu sejauh mana musyawarah berpengaruh terhadap kinerja pegawai di PT. Taliati Telaga Tanjung. Metode pengambilan sampel yang dipakai Peneliti adalah model sensus karena jumlah karyawan di perusahaan tersebut hanya 35 orang. Sehingga semua karyawan mengisi kuisioner. Sedangkan analisa yang dipakai dari data yang terkumpul adalah teknik Regresi Linear Sederhana. Dari hasil penelitian yang dilakukan, terbukti bahwa musyawarah berkorelasi kuat terhadap kinerja pegawai dan berpengaruh positif. Dengan nilai koefisien korelasi 0,614 dan nilai koefisien determinasinya sebesar 0,378.  Dari hasil penelitian yang dilakukan didapat persamaannya adalah sebagai berikut: Y= 14,962 + 0,336X yang artinya a) Konstanta = 14,962. Apabila variabel musyawarah adalah nol maka kinerja pegawai sebesar 14,962. jika musyawarah meningkat sebesar 0,336 maka kinerja pegawai akan meningkat sebesar 0,336. Sementara itu, didapat nilai Df = 32. Dan di dalam t tabel bernilai 2,037, dapat dilihat pada lampiran. Berdasarkan hasil penghitungan menggunakan SPSS 24 for Windows, nilai t hitung sebesar 4,474. Jadi dapat disimpulkan bahwa t hitung 4,474> t tabel 2,037, maka H0 diterima dan H1 ditolak, yang artinya variabel musyawarah berpengaruh terhadap kinerja pegawai.
Perforation of the gallbladder: a rare complication of acute cholecystitis.
Authors: Pérez Naranjo P , Revelles Paniza M , Garrido Márquez I , Garrido Pareja F
Published: November 2020

Caso clínico: mujer de 85 años acude a Urgencias con cuadro clínico de dolor abdominal con fiebre asociado a leucocitosis de casi 47.000 /mm³, a la que se realizó una Tomografía Computarizada con diagnóstico final de colecistitis aguda perforada complicada con abscesos perivesiculares e intrahepáticos.

Discusión: La perforación de la vesícula biliar es una complicación rara de la colecistitis aguda que se asocia a una mortalidad relativamente alta de hasta el 70%. Los síntomas y signos clínicos pueden ser indistinguibles de los de la colecistitis aguda no complicada, lo que lleva a un diagnóstico tardío, con muy mal pronóstico.

Conclusiones:El diagnóstico precoz de la perforación de la vesícula biliar y la intervención quirúrgica inmediata son de crucial importancia debido a la alta mortalidad que conlleva.
Rasgos y macrotendencias de la educación superior
Authors: Franco Amado Luz Dary , Pinto Lozano Ana María
Published: November 2020

La Educación Superior considerada el motor de progreso en la sociedad requiere tener un espacio privilegiado en la reflexión de todos los campos de la academia; en razón a dar cumplimiento  a este espacio de revisión y acercamiento, se recurre inicialmente a realizar la retrospectiva de la educación a nivel mundial y nacional, particularmente Colombia, como el  eje articulador de épocas históricas con rasgos sociales, políticos y culturales  predominantes que inciden en la intencionalidad y misión de la academia a nivel superior; esta retrospectiva comprende desde década de los 90 hasta la fecha. Seguidamente,  se realiza un acercamiento a la diacronía de la ES con el objeto de evidenciar los rasgos y macro tendencias que se mantienen o han evolucionado desde  y para su posicionamiento a nivel local, regional y mundial; para finalizar se presenta la concepción de la Responsabilidad social euleriana de la ES que transversaliza los procesos administrativos, académicos y pedagógicos de la educación.
Enzyme-instructed morphological transition of the supramolecular assemblies of branched peptides
Authors: Yang Dongsik , He Hongjian , Xu Bing
Published: November 2020

Here, we report the use of an enzymatic reaction to cleave the branch off branched peptides for inducing the morphological transition of the assemblies of the peptides. The attachment of DEDDDLLI sequences to the ε-amine of the lysine residue of a tetrapeptide produces branched peptides that form micelles. Upon the proteolytic cleavage of the branch, catalyzed by proteinase K, the micelles turn into nanofibers. We also found that the acetylation of the N-terminal of the branch increased the stability of the branched peptides. Moreover, these branched peptides facilitate the delivery of the proteins into cells. This work contributes insights for the development of peptide supramolecular assemblies via enzymatic noncovalent synthesis in cellular environment.
MULTILINGUALISM OF POST-SOVIET MIGRATION: FUNCTIONAL ASPECT
Authors:   Institute of Linguistics of the Russian Academy of Sciences, Russian Federation, Khilkhanova Erzhen V.
Published: November 2020

The article uses the results of a project aimed at studying the relationship between language and ethnic identity of non-Russian immigrants from the former Soviet Union in Western Europe. It is concluded that, on the one hand, the first-generation migrants «export» patterns of using L1 (ethnic language) and L2 (Russian language) formed in their native country. On the other hand, in a foreign cultural environment there is a transformation of existing and appearance of new functions and values of L1 and L2. Regarding L2 the author draws two main theoretical conclusions: 1) in a migration situation, the Soviet concept of the Russian language as a language of interethnic communication receives its «second life», 2) L2 fulfills the functions of the inner language — the language used for «internal» purposes, that is, for communication with people from the post-Soviet space sharing a common past and socialization experience
Study of Extracted Geometry Effect on Patient-Specific Cerebral Aneurysm Model with Different Threshold Coefficient (Cthres)
Authors: Sheh Hong Lim , Mohd Adib Mohd Azrul Hisham , Abdullah Mohd Shafie , Mohd Taib Nur Hartini , Hassan Radhiana , Abd Aziz Azian
Published: November 2020

The recent diagnostic assessment of cerebrovascular disease makes use of computational fluid dynamics (CFD) to quantify blood flow and determine the hemodynamics factors contributing to the disease from patient-specific models. However, compliant and anatomical patient-specific geometries are generally reconstructed from the medical images with different threshold values subjectively. Therefore, this paper tends to present the effect of extracted geometry with different threshold coefficient, Cthres by using a patient-specific cerebral aneurysm model. A set of medical images, digital subtraction angiography (DSA) images from the real patient diagnosed with internal carotid artery (ICA) aneurysm was obtained. The threshold value used to extract the patient-specific cerebral aneurysm geometry was calculated by using a simple threshold determination method. Several threshold coefficients, Cthres such as 0.2, 0.3, 0.4, 0.5 and 0.6 were employed in the image segmentation creating three-dimensional (3D) realistic arterial geometries that were then used for CFD simulation. As a result, we obtained that the volume of patient-specific cerebral aneurysm geometry decreases as the threshold coefficient, Cthres increases. There is dislocation of artery attached to the ICA aneurysm geometry occurred at a high threshold coefficient, Cthres. Besides, the physical changes also bring remarkable physiological effect on the wall shear stress (WSS) distribution and velocity flow field at patient-specific cerebral aneurysm geometry reconstructed with different threshold coefficient, Cthres.
CFD Analysis on the Effects of Different Coal on Combustion Characteristics in Coal-fired Boiler
Authors: Mohd Noor Noor Akma Watie , Hasini Hasril , Mohd Samsuri Muhamad Shazarizul Haziq , Meor Zulkifli Meor Mohd Faisal
Published: November 2020

Coal quality is essential for the optimum functioning of coal-fired power plants. One of the issues associated with coal quality deterioration is poor combustion behaviour which could result in ash deposition and environmental issues. This paper presents a CFD investigation of flow and combustion process in a full-scale furnace. Three different sub-bituminous coals with different properties were tested namely Coal A, B and C. The aim is to predict the combustion performance of these coals by observing its flow, temperature and species concentration inside the furnace. The exact boiler furnace geometry obtained from boiler operator was translated into CFD model with very little modification made for optimizing mesh. Grid dependency test carried out prior to the work shows the current mesh scheme is sufficient to accurately resolve the flow field. The results of the study show that combustion temperature for Coal B is the highest at approximately 1400°C. Coal C is predicted to give the highest velocity peak at certain regions of the furnace and interestingly enough, the same coal shows the shortest flame length and thus requiring additional flow to achieve the same penetration compared to other coals. Tracing of oxygen concentration inside the furnace show minimum oxygen left in the rear pass given by Coal A, indicating optimum combustion.
Computational Investigation of a Wind Turbine Shrouded with a Circular Ring
Authors: Takey Mohamed , Mat Lazim Tholudin , Ishak Iskandar Shah , Nik Mohd N.A.R , Othman Norazila
Published: November 2020

In this research work, a new design concept for shrouded turbines is introduced using a circular flange ring instead of a diffuser. The performance of a wind turbine shrouded with the conventional configuration of flanged diffusers is firstly investigated. This allows comparison to be made with the performance of the new design proposed in this project. The bare turbine used in this research work is a horizontal axis wind turbine with a diameter of 0.6 m, and the flange height is 10% of the diameter. The performance of the shrouded turbine is investigated using computational fluid dynamics; by solving the flow field using three-dimensional Reynolds Averaged Navier-Stokes for incompressible flow. Findings indicate that the performance of the turbine shrouded with the flange ring is superior to the bare turbine by 33%. It also has benefit over the conventional design as this new design concept is simpler and uses lesser material since it is not using the diffuser, which favorably in turn will reduce the cost. Subsequently, the findings of this research may have the potential to expedite the developments of green-source energy that undoubtedly could benefit the entire growing wind turbine industry.
Mathematical Modelling for Effects of Fineness Ratio, Altitude and Velocity on Aerodynamic Characteristics of an Airship Design using Computational Analysis
Authors: Jalasabri Jafirdaus , Romli Fairuz Izzuddin , Harmin Mohammad Yazdi
Published: November 2020

The external shape design change of an airship can be appropriately captured by design fineness ratio, which is defined as the ratio of airship's length to its maximum width. However, there is a lack of aerodynamic models that have been established for airship design purposes. In conjunction to this realization, the aim of this research work is to establish the effects of design fineness ratio of an airship towards its aerodynamic performance. The Atlant-100 airship is chosen as the reference design model for this study. In total, 36 simulation runs are executed with different combinations of values for the fineness ratio, altitude and velocity. The obtained CFD simulation results are then statistically analysed using Minitab software to evaluate the significance of the design fineness ratio effects. From the results, it has been found that smaller fineness ratio corresponds to higher aerodynamic lift and drag forces. As in the case simulated in this study, the smallest fineness ratio of 0.93 has been shown to correspond to the highest value of generated lift coefficient while having comparable value of generated drag coefficient with the other fineness ratios. This highlights that a smaller fineness ratio of the airship design is more suitable. The constructed mathematical models to capture these effects have also been validated with a few goodness-of-fit tests. For the regression model of fineness ratio impact on the lift coefficient, it has R2 value of 0.941. When its predictive accuracy is tested with few simulated random cases, the maximum error obtained is only 6%. On the other hand, for the regression model of the fineness ratio impact on drag coefficient, the R2 value is 0.962 and maximum predictive error from the simulation random cases test is only 9%. Overall, it can be concluded that the constructed regression models have good predictive capability on the impact of design fineness ratio on the aerodynamic performance of the airship under this study.
Mirrors, Contradictions and Paradoxes in Los espejos comunicantes, by Óscar Hahn
Authors: Castañeda Manuel
Published: November 2020

As in all cultures, the mirror is a recurring symbol in both Latin-American poetry and narratives. It has various meanings when seen in different literary contexts. The most notable poets of the 20th century, such as Jorge Luis Borges, Octavio Paz, and Carlos Pellicer associate it with mystery, horror, silence, emptiness, catastrophe, and everything which is contradictory, paradoxical, and strange. According to some, the mirror itself reveals the source of poetry and literature, a kind of abyss from which something arises out of nothing. It also allows one to see himself through the eyes of the other. In the book of poetry entitled Los espejos comunicantes, Óscar Hahn, the mirror is a constant entity. Like the aforementioned poets, he reiterates the same obsessions, images, and symbols associated with it. However, here the mirror takes on a new dimension which has not been explored by the others. His poems suggest that what is reflected in the mirror, our wishes, dreams, feelings, and fears, are our true reality. The reality displayed in the mirror is beyond our control. It cannot be understood, organized or classified for our own benefit in the name of science and progress. On the contrary, what should be limited by the confines of the mirror escapes and consumes our reality. For Óscar Hahn our true nature is catastrophe, chaos, passion for destruction, and a love of death. This essence emerges from the mirror and devours everything.
Book Review: A.S. Vitale, The End of Policing.
Authors: Dutcher Thomas
Published: November 2020

In his book, The End of Policing, Alex S. Vitale, professor of sociology and coordinator of the Policing and Social Justice Project of Brooklyn College, immerses the reader into the world of critical policing studies with his comprehensive distillation of the current issues related to policing in America. Broadly, this is a book about economic, social, and political injustices and how this trifecta manifests itself in the various aspects of policing. The book begins its initial argument by proposing that the most commonly enacted methods of reform (more training, body-worn cameras, and community policing programs) have not and will not “reduce the burden or increase the justness of policing” (222).
Az erdõtûz mint a terror egyik új formája
Authors: Besenyő János
Published: November 2020

The author provides on overview of the recent forest fire cases in Israel, where arson is a form of terrorism.
CRECIMIENTO ECONÓMICO Y CRECIMIENTO POBLACIONAL: UNA APLICACIÓN DEL MODELO DE ECUACIONES DIFERENCIALES EN BOLIVIA
Authors: Orlandini G Ingrid , Salamanca E Arturo
Published: November 2020

El crecimiento económico tiene una estrecha relación y correlación con el crecimiento poblacional, mientras más pobladores tenga un paí­s mayor será su crecimiento económico, en este estudio se demostró esta relación a través del modelo de ecuaciones diferenciales heterogéneas, se obtuvo una ecuación que describió el comportamiento de ambas variables determinándose la fuerza, el sentido de la relación y el grado de asociación lineal.Palabra claves: crecimiento económico, población, ecuaciones diferenciales. 
Abstrac Economic growth has a close relationship and correlation with population growth, the more inhabitants a country has, the greater its economic growth, in this study this relationship was demonstrated through the model of heterogeneous differential equations, an equation was obtained that described the behavior of both variables determining the strength, the sense of the relationship and the degree of linear association.Keywords: economic growth, population, differential equations.
ESPACIOS PÚBLICOS Y ORDEN URBANO: EL COMERCIO EN VíA PÚBLICA, CONFLICTOS, ORGANIZACIONES Y LEGITIMACIÓN
Authors: Bailey Antonio
Published: November 2020

La situación de todos los espacios público en la ciudad de Sucre, en especial en las zonas aledañas a los mercados central y campesino, se encuentra muy deteriorada por la invasión del comercio en ví­as públicas. El estudio aborda la temática espacios públicos y orden urbano realizando un acercamiento a la definición de estos conceptos, tratando de comprender el rol de los espacios públicos en la vida de las ciudades. Se muestra el estado real de los espacios públicos destinados al tránsito de vehí­culos y personas en Sucre, cuyos resultados evidencian una ciudad sitiada por el comercio callejero que se fortalece en el discurso del derecho al trabajo y en el poder polí­tico que han adquirido sus organizaciones aprovechando un sistema polí­tico Nacional.Palabras claveEspacios públicos; ciudadaní­a; orden urbano; comercio callejero; redes sociales; legitimación
Abstracthe situation of all public spaces in the city of Sucre, especially in the areas surrounding the central and peasant markets, is greatly deteriorated by the invasion of trade on public roads. The study addresses the theme of public spaces and urban order by approaching the definition of these concepts, trying to understand the role of public spaces in the life of cities. It shows the real state of public spaces for the transit of vehicles and people in Sucre, whose results show a city besieged by street commerce that is strengthened in the discourse of the right to work and the political power that their organizations have acquired, taking advantage of a national political system.KeywordsPublic spaces; citizenship; urban order; street trade; social networks; legitimation
EXCLUSIÓN E INSERCIÓN LABORAL DE LOS JÓVENES; UNA MIRADA DESDE LA PERSPECTIVA DE GÉNERO
Authors: Oblitas Vedia Antonio , Plaza Noemí­
Published: November 2020

El análisis de la dinámica de la inserción laboral de los jóvenes es un tema de creciente interés social y al ser los jóvenes un segmento significativamente amplio en la población de la ciudad de Sucre (cuya presencia contribuye a la dinámica económica), la presente investigación apunta a identificar los factores que condicionan y determinan la inserción laboral de los jóvenes (hombres y mujeres) en la ciudad.
En el presente estudio, se investigan problemas del comportamiento del mercado laboral, desde la perspectiva de los jóvenes profesionales, se identifican variables, conceptos y exploran datos desde diferentes puntos y enfoques, todos relacionados a la inserción laboral de los jóvenes profesionales. Por otra, se establecen las causas, los efectos y en qué condiciones se manifiestan los diferentes fenómenos asociados a la inserción laboral en la ciudad de Sucre. Por tanto, se brinda información generada sobre los procesos de inserción laboral de los jóvenes profesionales en la ciudad de Sucre. Palabras Claves Jóvenes profesionales, mercado de trabajo, inserción laboral
AbstractThe analysis of the dynamics of the labor insertion of young people is a topic of growing social interest and since young people are a significantly broad segment of the population of the city of Sucre (whose presence contributes to the economic dynamics), the present research points to identify the factors that condition and determine the employment of young people (men and women) in the city.
In the present study, problems of labor market behavior are investigated from the perspective of young professionals, variables, concepts are identified and data explored from different points and approaches, all related to the labor insertion of young professionals. On the other, the causes, effects and under what conditions the different phenomena associated with labor insertion in the city of Sucre are manifested. Therefore, it provides information generated on the labor insertion processes of young professionals in the city of Sucre.KeywordsYoung professionals, labor market, labor insertion
La « méthode des 3 axes » pour le Children’s Apperception Test (CAT) : synthèse et exploitation des données CAT
Authors: Claudon Philippe , Simon Florent
Published: November 2020

Les auteurs présentent la procédure d’exploitation du CAT élaborée dans la « méthode des 3 axes ». La grille de cotation des items a déjà été explicitée (Simon, Claudon, 2018). Ils exposent trois opérations appliquées à un protocole CAT après la cotation : 1° la démarche pour établir la synthèse des données ; 2° la démarche des formules d’analyses qui utilisent les trois axes de cotation ; 3° la démarche de comparaison avec des repères normatifs développementaux pour trois groupes d’âge (3-4 ans ; 4-6 ans ; 6-12 ans). Cette procédure permet de faciliter le repérage des problématiques projetées par l’enfant dans ses récits CAT et permet d’évaluer son fonctionnement psychique en référence à son groupe d’âge.
Industrie de la gestion d'actifs : de l'émergence à l'apparition de nouveaux risques
Authors: Galanti Sébastien , Le Quéré Françoise
Published: November 2020

Au début des années 1980, différents rapports et analyses promeuvent l'émergence des fonds d'investissement d'épargne collective. L'objectif est d'attirer l'épargne vers les marchés financiers, afin de concurrencer le financement bancaire, et ainsi diminuer le coût de financement et favoriser l'investissement. D'un côté, la taille de l'industrie de la gestion d'actifs aujourd'hui atteste du succès de cette ambition. Les placements des ménages comme des investisseurs institutionnels sont mieux diversifiés qu'il y a quarante ans. D'un autre côté, de nouveaux risques pesant sur les marchés et un impact ambivalent sur le financement et l'investissement tempèrent ce succès et inquiètent les régulateurs. Classification JEL : G11, G23, G28.
Les politiques monétaires à l'épreuve de la libéralisation financière
Authors: Pollin Jean-Paul
Published: November 2020

Cet article se propose de retracer brièvement l’histoire des politiques monétaires depuis l’après-guerre pour mettre en perspective et faire ressortir l’incidence du processus de libéralisation financière sur ces politiques. On observe en effet qu’à partir des années 1980 la plupart des pays avancés ont adopté un même modèle de «  central banking  » concentrant l’action des autorités monétaires sur l’objectif de stabilité des prix et réduisant leur domaine et leurs instruments d’intervention. On montre que la négligence de l’objectif de stabilité financière a remis en cause, après la crise de 2007, le modèle en question et peut-être aussi le processus de libéralisation. Classification JEL : E50, E52, E58, G01.
La libéralisation des mouvements de capitaux : entre transformations structurelles, débats circulaires et cadres multilatéraux
Authors: Lepers Étienne
Published: November 2020

À l'heure où la question de la gestion des flux de capitaux et de l'utilité des contrôles est de nouveau à l'ordre du jour, cet article se propose de revenir sur les origines des choix politiques relatifs à la libéralisation des mouvements de capitaux. Le mouvement structurel de libéralisation des décennies 1980 et 1990 et les différentes séquences par pays ne peuvent être uniquement expliqués par un consensus scientifique clair sur les bienfaits de la libéralisation, ni par les transformations structurelles du système financier mondial. Cet article relève notamment le rôle d'influence crucial joué par les cadres multilatéraux tels que ceux de l'UE, de l'OCDE et du FMI sur ces choix politiques. Il souligne aussi la circularité des débats sur les coûts et les bénéfices de la libéralisation au fil du temps et soutient qu'une telle perspective historique fournit une grille de lecture critique utile pour les débats actuels. Classification JEL : F20, F21, F30, F32.
À l’ombre de la protection gaullienne ? L'exil en France des déserteurs américains de la guerre du Vietnam
Authors: Journoud Pierre
Published: November 2020

Avec au moins 500 000 déserteurs et insoumis, les forces armées des États-Unis ont connu la plus grande hémorragie de leur histoire depuis la guerre de Sécession. Et pourtant, ces réfractaires demeurent encore les parents pauvres de l’historiographie pléthorique de la guerre du Vietnam. Si l’immense majorité d’entre eux ont pu rejoindre les États-Unis, plusieurs dizaines de milliers se sont réfugiés au Canada et en Europe. Une centaine, tout au plus, a choisi la France, où ils créèrent l’Union française des déserteurs et insoumis américains. C’est à eux que cet article est consacré, à leur rôle dans le mouvement d’opposition à la guerre du Vietnam, en France, au traitement qui leur a été réservé par les autorités françaises, et à leur implication dans le mouvement de Mai 68, qui valut finalement l’expulsion aux plus activistes.
Nurse-Sensitive Quality Metrics to Benchmark in Pediatric Cardiovascular Care
Authors: Connor Jean , Hartwell Lauren , Baird Jennifer , Cerrato Benjamin , Chiloyan Araz , Porter Courtney , Hickey Patricia
Published: November 2020

Background

Associations between the quality of nursing care and patient outcomes have been demonstrated globally. However, translation and application of this evidence to robust measurement in pediatric specialty nursing care has been limited.

Objectives

To test the feasibility and performance of nurse-sensitive measures in pediatric cardiovascular programs.

Methods

Ten nurse-sensitive measures targeting nursing workforce, care process, and patient outcomes were implemented, and measurement data were collected for 6 months across 9 children’s hospitals in the Consortium of Congenital Cardiac Care–Measurement of Nursing Practice (C4-MNP). Participating sites evaluated the feasibility of collecting data and the usability of the data.

Results

Variations in nursing workforce characteristics were reported across sites, including proportion of registered nurses with 0 to 2 years of experience, nursing education, and nursing certification. Clinical measurement data on weight gain in infants who have undergone cardiac surgery, unplanned transfer to the cardiac intensive care unit, and pain management highlighted opportunities for improvement in care processes. Overall, each measure received a score of 75% or greater in feasibility and usability.

Conclusions

Collaborative evaluation of measurement performance, feasibility, and usability provided important information for continued refinement of the measures, development of systems to support data collection, and selection of benchmarks across C4-MNP. Results supported the development of target benchmarks for C4-MNP sites to compare performance, share best practices for improving the quality of pediatric cardiovascular nursing care, and inform nurse staffing models.
Conflict Management Education in the Intensive Care Unit
Authors: White Bobbie Ann Adair , White Heath D. , Bledsoe Christie , Hendricks Randy , Arroliga Alejandro C.
Published: November 2020

Background

Conflicts in medical settings affect both team function and patient care, yet a standardized curriculum for conflict management in clinical teams does not exist.

Objectives

To evaluate the effects of an educational intervention for conflict management on knowledge and perceptions and to identify trends in preferred conflict management style among intensive care unit workers.

Methods

A conflict management education intervention was created for an intensive care team. The intervention was 1 hour long and incorporated the Thomas-Kilmann Conflict Mode Instrument as well as conflict management concepts, self-reflection, and active learning through discussion and reviewing clinical cases. Descriptive statistics were prepared on the participants’ preferred conflict management modes. A pretest/posttest was analyzed to evaluate knowledge and perceptions of conflict before and after the intervention, and 3 open-ended questions on the posttest were reviewed for categories.

Results

Forty-nine intensive care providers participated in the intervention. The largest portion of participants had an avoiding conflict management mode (32%), followed by compromising (30%), accommodating (25%), collaborating (9%), and competing (5%). Pretest/posttest data were collected for 31 participants and showed that knowledge (P < .001) and perception (P = .004) scores increased significantly after the conflict management intervention.

Conclusions

The conflict management educational intervention improved the participants’ knowledge and affected perceptions. Categorization of open-ended questions suggested that intensive care providers are interested in concrete information that will help with conflict resolution, and some participants understood that mindfulness and awareness would improve professional interactions or reduce conflict.
Seismic Estimation of Spatial Distribution of Subsurface StressField -Analysis of Shear Wave Anisotropy Caused by Non-Hydrostatic Stress Components
Authors: Watanabe Yusuke , Mikada Hitoshi , Takekawa Junichi
Published: November 2020

In this paper we would like to demonstrate the feasibility of marine shear wave survey to estimate seismic anisotropy, which is an indicator of subsurface stress field influencing the development of hydorocarbon reservoirs. In order to realize shear wave survey in the offshore, we propose the virtual cross-dipole data method with use of seismic interferometry. The virtual cross-dipole data can be generated by calculating cross-correlation function with each components of seismic data traces from two adjoint monopole source in sea water. One monopole source location becomes a virtual source, while the other source locations become virtual receiver locations. With these virtual cross-dipole data we try to estimate shear stiffness coefficients in stiffness tensor. We combine this virtual cross-dipole method and full waveform inversion (FWI) for shear stiffness coefficients estimation. In order to prove the feasibility of our method, we conducted numerical experiment with use of a 3D subseafloor structural model with a tricomponent ocean bottom seismometer. The results of the experiment show the possibility of shear stiffness coefficient and horizontal differential stress estimation as a function of space.
Static Adsorption of Amphoteric Surfactant
Authors: Mahamad Amir Mohammad Iqbal , Zainal Suzalina , Abd Manap Airf Azhan
Published: November 2020

The purpose of this study was to investigate the maximum amphoteric surfactant adsorption by studying parameters like rock type, salinity, alkali type, alkali concentration and surfactant concentration and to evaluate optimum parameters that would provide minimum amphoteric surfactant adsorption. The amphoteric surfactant was studied had been tested in Malaysia’s first chemical enhanced oil recovery (CEOR) pilot in Angsi Field. Hence, it is very important to properly understand the adsorption mechanism, parameters and potential for this surfactant to reduce uncertainty. First rock samples were characterized. Existing static adsorption methodogy was being improved to reduce redundant samples and long experiments duration to produce repeatable results. Then, actual experiments with varying adsorption parameters were carried out. Amphoteric adsorption increased when clay content of reservoir rock increase and so did the surface area. Alkali had been demonstrated to significantly decrease adsorption of amphoteric surfactants and a novel kind of alkali, organic alkali and ammonia are introduced with advantages of lowering adsorption better than the conventional alkali (sodium carbonate). The dynamic adsorption experiments were performed by injecting the chemical solution through reservoir core until an equilibrium state was reached. The dynamic method better described the adsorption process and the result was more reliable. Dynamic adsorptions were about 10 to 13 times lower than static adsorption. Further studies incorporating surface area, grain size, accessible pore volume and mineralogy including clay type were required to build robust correlation from static to dynamic adsorption.
The Drag Marine Vertical Axis Current Turbine to Assist in the Electrification of Offshore Platforms
Authors: Maimun Adi , Suof Aljen Atef Salem
Published: November 2020

According to the meteorological and oceanographic data of wind and current speeds; these data provide valuable input for designing power converters as free green power resources. Owing to the current speeds of the ocean which are between 0.5 to 2.5 m/s, the multi-directional Drag Marine Vertical Axis Current Turbine (DM-VACT) can be a potential free green renewable energy resource. Having a few of these turbines working together in arrays or farms can considerably supply power to the nearshore and offshore platforms. This system can significantly reduce the offshore platform fuel costs and CO2 emissions. The paper presents DM-VACT and investigates its operational performance. The results show that the turbine has a power coefficient of 19 % and torque coefficient of 76 % at an average designed speed of 1 m/s. Moreover, the simulation results show that the turbine can produce about 24 KW at the current speed of 2 m/s. Moreover, having a larger amount of these turbines in a farm with the oblique arrangement of multi-turbines at on side layout comprising ten DM-VACTs and occupying an area of 370 m X 10 m can produce about 280 to 290 KW. The other farm configuration comprising eleven turbines is based on the V type layout; it can occupy an area of 210 m X 100 m and produce about 305 KW. The results show that the system in arrays can produce and supply the offshore platform with significant power. Integrating this multi-turbines system with an offshore power system as a hybrid solution can contribute to fuel savings and in the reduction of CO2 emissions.
Preliminary Design Analysis of Deepwater Production Risers on a SPAR
Authors: Dev Kr Arun
Published: November 2020

As the oil and gas industry moves towards deep waters in search of hydrocarbon, production risers are unequivocally affected by it. A key factor is a dynamic behavior as it may lead to increased loads on the platform (floater), especially under severe environmental conditions.

This paper serves to analyze and compare the dynamic behavior between different kinds of production risers (Steel Catenary Risers, Flexible Dynamic Risers, and Free Standing Hybrid Risers) and their impact on the floating production platform (floater) in an actual field environment. The basic cost comparison is carried out briefly to assess their suitability in deep waters.

The production risers are modeled on Spar floater subjected to environmental conditions in the Gulf of Mexico. Hydrodynamic data such as added mass and damping coefficients, forces and motion Response Amplitude Operators (RAOs) of the Spar are first obtained using the simulation software MOSES through uncoupled analysis. Subsequently, coupled dynamic analysis is performed for the production risers using the dynamic analysis software OrcaFlex.Results and discussion evaluate the impact of the dynamic behavior and stress of the production risers as well as the cost.
Design One, Build Many: The Offshore Wellhead Facilities OWF Design for Marginal Field Developments
Authors: Abd Rahman Amir , Abd Aziz Saiful Azuan , Azmi Norhazrin , Ee Zhi How , Abu Bakar Azureen Alya
Published: November 2020

The scope of this paper discusses the development of Offshore Wellhead Facilities within PETRONAS Group of Companies to mitigate the development of marginal offshore fields during low and volatile oil prices, as well as a case study of its first implementation at Field T, offshore Peninsular Malaysia. As the oil price plunged from USD 115/barrel to USD 27/barrel (Brent) in 2014, PETRONAS’ flagship marginal field operator, Vestigo Petroleum Sdn Bhd faced challenges to develop fields within its portfolio. It instigated a new way of field development, which includes a portfolio-based view, accelerated monetization, uncertainties reduction and better control of scope and cost. Uncertainties on the facilities design are narrowed and greater focus could be allocated to manage subsurface uncertainties during planning stage. Uncertainties on the facilities design are narrowed and greater focus could be allocated to manage subsurface uncertainties during planning stage. PETRONAS has since adopted this approach for other field development types e.g. near field developments, redevelopment of existing fields and stranded fields.
Depositional Facies Prediction Using Artificial Intelligence to Improve Reservoir Characterization in a Mature Field of Nam Con Son Basin, Offshore Vietnam
Authors: Tran Tung Vu , Ngo Hai Huu , Hoang Son Ky , Tran Hung N. , Lambiase Joseph J.
Published: November 2020

Interpretation of geological facies such as lithofacies and depositional facies is a process of classifying high dimensional data into groups. Conventional Machine Learning methods such as random forest, support vector machine, back progradation neutral network have been tested throughout in lithofacies classification (Hall and Hall, 2017). However, poor performances were observed in depositional facies prediction as the later requires integration of more complex data such as depositional facies interpretation in core, wireline, biostratigraphy in the context of depositional units, not sample by sample data points. The limitation of data-driven classifier and the value of geological derived features in facies classifications was discussed in the literature (Halotel et al., 2020). In order to improve the classifier performance, a novel hybrid approach was implemented, which involved an automatic depositional unit breakdown, well log feature extractions, machine learning core-log models and a rule based expert system.

In this paper, an Artificial Intelligence (AI) system was employed that integrates machine learning with an expert system to predict depositional facies and tested its reliability versus facies interpretations made from conventional cores in test wells. In the prediction method, data samples were depositional units derived from Gamma Ray value changes that were integrated with core and biostratigraphic data. These were then passed through an expert system containing a set of fuzzy rules to yield final probabilities for each of the 35 depositional facies stored in a library. The AI system helped to produce multiple scenarios with qualify uncertainty, consistent depositional facies classification based on depositional facies observed in core, biostratigraphy and wireline logs.

Depositional facies in the aforementioned reservoir were predicted with the AI system for the cored intervals in X1 and X2 using only well logs and biostratigraphic data as input. The predicted facies were in strong agreement with the core interpretations as both methods concluded that the depositional environment was a marine delta. The AI prediction assigned a higher proportion of the X2 succession to the "Marine Delta" depositional facies than it did for the X1 core; the facies difference in the two wells was subtle and not recognized by the core interpretation. Seismic attributes suggested that the more variable facies succession that AI predicted for X1 may have geological significance. The AI tool generated reliable and consistent results and appeared capable of reducing the uncertainties of predicting facies distribution and the subsequent development of conceptual depositional models.
A Transient Model for Prediction of Asphaltene Deposition Along Tubing String: Enhanced Petroleum Production Implications
Authors: Peyman Pourafshary , Majid Zamani , Muhammad Hashmet Rehan
Published: November 2020

Prediction of asphaltene deposition in production system and design of production parameters adequately to control this issue is inevitable. We presented a transient model to predict asphaltene deposition along the tubing string in the production system. An accurate two-phase fluid flow model was coupled with a solid asphaltene precipitation model and a sub-layer particle deposition model in turbulent flow with the ability to predict the deposition of particles in vertical surfaces. Our procedure shows good agreement with the experimental work previously done to measure the rate of deposition of flocculated asphaltene particles via an accurate thermal apparatus at different temperatures and flow rates. The developed model was used to simulate the deposition of asphaltene in a real field. The results suggest that even with high flow rates, the deposited asphaltene caused a 2.5% reduction in wellhead pressure after 30 days of production. The developed model can predict the transient location of the asphaltene, onset pressure, and the profile of the deposited asphaltene in a wellbore versus time. In practice, the proposed model can be used for analysis of different production scenarios in a given well to minimize the possibility and extent of asphaltene deposition and enhance the production rate.
Jack-Up Rig Installed Structure for Marginal Field Development
Authors: Raja Badrol Raja Sharifuddin , A. Rahman Ahmad Rizal , M. Daud M. Hafis , A. Razak Zahari , Rohani Muhammad Joehan , Saifuzzaman Syamsulzaidi , M. Sidek Ahmad Mahmud , Natarajan Shreenaath , Ismail Muhammad Yussof , Rosli Hilal
Published: November 2020

Fixed offshore structures has predominantly been installed via the conventional crane barge, no matter whether it is small or a big structure. Utilization of a crane barge has resulted in a significant installation costs as the mobilization cost and the Daily Charter Rates (DCR) for the vessel is very high. Supporting the innovation agenda in an effort to better control project costs, the rig-installed platform concept is one of the option chosen to install small lightweight structure due to the cheaper cost of Jack-up Rig (JUR) day rates compared to a conventional crane barge.

The savings in material, schedule and mobilization could be realized as the jack-up rig can proceed with the drilling of the wells (which are also the main piles of the structure) directly after the structure installation. As JUR is primarily used to drill oil/gas wells, some minor modification may be required to the JUR before it can be utilized to install small and lightweight offshore structures, both jacket and topsides, with some degree of limitations due to the drilling envelope and derrick lifting capacity.

This ‘know-how’ has been around for quite some time in the industry by niche service providers, but was not regularly exploited in this part of the world as it has been a norm for the field development team to manage an installation contractor whilst the wells team manage a drilling contractor. This paper shares the learnings of a wellhead platform for a marginal field that was successfully engineered, fabricated and offshore installed using a JUR and eventually achieved 1st Oil within 9 months of contract award at an installed cost below USD 29 Million. This paper will mainly discuss on the pre-requisites of JUR installed platforms, case for change, concept select and potential value creation to the overall project.

The project referenced above has exemplified to the industry that JUR installed platform is a feasible option in this part of the world, with significant cost savings, contributing to a better economics for a marginal field project.
Challenges on the Installation of Offshore Floating Units in Congested Subsea Fields and Exposed to Tropical Squall
Authors: Bamdad Mehrdad
Published: November 2020

Positioning and installation of a floating production unit requires mobilization of necessary marine spread associated with comprehensive engineering preparation. Risk based rules and regulation define certain criteria as general guideline but to be firmed and verified based on risk assessment. This paper reviews the criteria in a tropical area with congested subsea facilities where the squall wind brings some risks to the installation and with subsea facility as already installed or wet-stored which makes the normal criteria more difficult to be met. With reference to a successful recent installation, procedure for the installation in terms of engineering assessment and operational works proposed.

In this paper, risks and uncertainties with an offshore floating unit are presented based on marine spread with variation in their characteristics and reliability, mooring system characteristic and redundancy, engineering and installation team capabilities. Practical possibility considered to mitigate the given risks and based on that, positioning and installation criteria revisited against the general criteria as come from standard. Relevant engineering analyses are proposed with the type of results expected.

As results, a practical procedure for an installation with recommended sequences, type and characteristics of marine spread and mooring equipment are provided. Some recommendations are provided for field development and overall project schedule to be considered in an early stage of a project to ease the installation phase and reduce risks and costs. Some key engineering analyses for station keeping and line transfer are proposed to verify capacity of the proposed installation spread against the possible environmental and operation scenarios.

This paper provides some further clarity in terms of installation criteria and procedure for positioning and installation of offshore production units particulary for the spread moored system with reference to a successful installation campaign in tropical area subject to squall and congested subsea field.