bluuebunny/crossref_metadata_2025_split huggingface dataset:
Su vartotoju susijusių žinių kūrimas, paremtas didžiųjų duomenų analitika
Authors: Gribovskis Justas 
Published: January 2019

[full article and abstract in Lithuanian; abstract in English]
This article discusses the issues related to the interaction between big data and the new knowledge. A great deal of attention is paid to the development of new knowledge from big data analytics. The research scope of this article encompasses the largest telecommunications companies in Lithuania, which collect, process and adapt large amounts of data in their business environment. This new knowledge is related to the user and derives from the big data analysis, and it plays a very important role in today’s competitive environment. The study reveals that companies collect and process big data in order to get to know their customers (users) as much as possible. Today’s marketing would be impossible without big data analytics and the new knowledge gained from it.
Įkyrus persekiojimas ir jo aukos
Authors: Michailovič Ilona 
Published: January 2019

[full article and abstract in Lithuanian; abstract in English]
Stalking is a complex social phenomenon that can take on many different forms. Stalking is a vicious, subtle and devastating crime, and the victims of stalking seem to suffer long-lasting consequences. A clear relationship emerges between the functioning and dissemination of gender stereotypes and stalking as a form of gender-based violence. In this study, the way in which stalking occurs is discussed, and the defendants’ and victims’ backgrounds are taken into account. This article discusses the criminalization of stalking, the reasons for stalking being criminalized and the sanctions applied for stalking.
This article also addresses a range of issues that expressly substantiate a need for effective measures to be taken against stalking. The prevention of stalking is certainly a long process and cannot be done without the inspiration and activity from the state police, non-governmental organizations and the collaborations of victims, which are all essential if law enforcement agents are to gather useful information and understand the exact nature of the occurrences. Hence, more research needs to be conducted in this field. Additional attention, research and training are required to better understand the most effective responses to reduce the risk of recidivism.
Clúster, infraestructura y mercadeo de ciudad. Medellín 1995-2013
Authors: Pineda Gómez Hernan Dario 
Published: January 2019

El presente artículo analiza la contribución de la estrategia clúster al proceso de metamorfosis de la ciudad de Medellín en el periodo 1995-2013. Esta iniciativa emerge en el año 1995 en el marco del estudio la ventaja competitiva de Medellín, conocido como el informe Monitor. En años siguientes se inicia un proceso de arti- culación público privada, del cual surge la propuesta Medellín, mi empresa en el año 2005, y años después, esta iniciativa evoluciona en una política pública local definida en el Acuerdo 087 de 2009 del Concejo Municipal, conocida como Medellín, ciudad clúster.Las acciones adelantadas por los gobiernos locales en el periodo de estudio, han entrelazado la organización del tejido empresarial, la producción de una plataforma urbanística para la competiti- vidad y un componente discursivo y de mercadeo, que, en su conjunto, le apuestan a posicionar a la ciudad como atractivo com- petitivo. Este funcionamiento articulado genera un ciclo, que se pueden interpretar en espiral, en función de la apuesta clúster, ya que el avance de un eslabón impulsa a los demás, lo que posibilita que el ciclo continúe avanzando, aportando a la consolidación de la estrategia y a su vez, impactando la transformación de Medellín.
Mercado inmobiliario y metamorfosis urbana en ciudades intermedias. Gringolandia en Cuenca: la tierra prometida
Authors: Cabrera Jara Natasha Eulalia 
Published: January 2019

Las ciudades menores han ingresado en la competencia por el capital y por posicionarse en los diversos rankings internacionales. Cuenca, Ecuador, es una de ellas y se toma como caso de estudio debido a su condición jerárquica y al éxito de las estrategias de marketing urbano que la han insertado en las dinámicas de la industria internacional del turismo y del mercado inmobiliario para jubilados extranjeros en la última década. En el artículo se analizan las transformaciones urbanas derivadas en dos zonas específicas de la ciudad entre 2000 y 2017, donde se han desencadenado procesos de gentrificación y de destrucción creativa, articulados a dinámicas más amplias de acumulación capitalista y de mercantilización de lo urbano.
Conflictos intermetabólicos e intrametabólicos. Una Historia de los Conflictos Socio-Ambientales entorno a las compañías transnacionales en el Pacífico Sur (1920-1990)
Authors: Barboza Luis Conejo 
Published: January 2019

El presente artículo surgió a partir de una investigación auspiciada por del Centro de investigaciones históricas de América central (CIHAC) durante el año 2012 en el marco del proyecto de historia regional. La investigación intenta explicar las causas y procesos que permitan poder conocer el origen de los conflictos socio-ambientales en el Pacífico Sur costarricense. A partir de tipologías construidas desde el metabolismo social, se pretende entender, a mayor profundidad, la relación entre los diferentes actores que han interactuado en la región de estudio y cómo esas relaciones se han convertido en conflictivas.
ANÁLISIS DE LAS VARIABLES DE JUEGO EN UN PARTIDO DE TENIS DURANTE UN TORNEO NACIONAL EN COSTA RICA
Authors: Rodríguez Campos Carlos , Montoya Araya Johnny 
Published: January 2019

El tenis de campo ha logrado una gran masificación en las últimas décadas en Costa Rica, razón por la cual se vuelve cada día más importante la aplicación de las ciencias del movimiento humano para lograr un mejor desarrollo y evolución del deporte, y sobre todo en las etapas infantiles y juveniles. Es por ello, que esta investigación se enfoca en el análisis descriptivo de diferentes variables del deporte, presentes en los juegos de tres categorías menores. Metodología:participaron 36 jóvenes (18 mujeres y 18 hombres), con edades entre los 12 y 18 años, dentro de las categorías de U-14, U-16 y U-18. Se evaluaron partidos del tercer torneo nacional de menores, realizado por la Federación Costarricense de Tenis (FCT); se cuantificaron los golpes de derecha, golpes de revés y el saque, también las dobles faltas, los golpes ganadores, los errores no forzados, los rallies, los golpes por punto jugado, la cantidad de puntos jugados, los games, la cantidad de puntos por game, y el tiempo total del partido. Se realizó estadística descriptiva, así como un total de 13 ANOVAS de 2 vías de 2x3. Resultados: se elaboró un perfil de juego, para cada una de las tres categorías de edades y para ambos sexos, mostrando la manera en la que compiten, además de las fortalezas y debilidades para cada grupo.Conclusiones: el perfil de descripción del tenis durante competencia en jugadores de ambos sexos de categorías menores en Costa Rica, ha demostrado ser significativamente diferente en muchas de las variables estudiadas (11 de 13); por lo que este estudio proporciona datos que pueden ser utilizados para desarrollar protocolos de entrenamiento para tenistas juniorsde Costa Rica, además de entender el funcionamiento de la competición en cada categoría y sexo.
¡Mira qué alegría! Promoviendo el conocimiento de la cultura andaluza en Educación Secundaria Obligatoria: una propuesta didáctica
Authors: Trigo Ibáñez Ester , Rodríguez Blázquez Irene María , Moreno Verdulla Pablo 
Published: January 2019

One of the basic premises of the concretion that is made in Andalusia of the curriculum is the presence of elements inserted in the cultural heritage of the Andalusian citizenship. Since amenco is a fundamental piece within the Andalusian culture, the administration makes available for teachers a series of resources in order to guarantee the presence of this folkloric manifestation in Andalusian schools. Located in the didactics of amenco, in this paper we offer an interdisciplinary Project from Literature to Music. Through the research on the concept of Alegrías de Cádiz the seven key competences will be devel- oped from a functional perspective.
Percepções de jovens em conflito com a lei privados de liberdade: educação e socialização
Authors: Fialho Lia Machado Fiuza , Vasconcelos José Gerardo 
Published: January 2019

A pesquisa objetivou compreender as percepções juvenis acerca do significado da experiência socioeducativa de internação, medida privativa de liberdade, que se propõe a ser educativa e socializadora. Com a metodologia da história oral biográfica coletou-se sete entrevistas livres como fontes primárias. Os resultados apontaram característica acerca do perfil dos jovens - defasagem escolar, ingresso precoce no mercado de trabalho, baixa renda, desagregação familiar e rescendência infracional - e exprimiram cinco categorias que problematizam a experiência da internação - violência sofrida, identidade infratora, perspectivas e planos dos jovens, código de ética, significado da internação. A discussão, realizada mediante a análise de conteúdo, constatou percepções negativas referentes à socioeducação e educação na internação associada à perda de tempo e prevalência do caráter punitivo em detrimento do educativo, já que o disciplinamento coercitivo promovia clima pouco amistoso sob a tônica da violência e a educação era negligenciada e relegada plano inferior de importância.
K-Values-Based Upscaling of Compositional Simulation
Authors: Salehi Amir , Voskov Denis V. , Tchelepi Hamdi A. 
Published: January 2019

Summary
Enhanced-oil-recovery (EOR) processes involve complex flow, transport, and thermodynamic interactions; as a result, compositional simulation is necessary for accurate representation of the physics. Flow simulation of compositional systems with high-resolution reservoir models is computationally intensive because of the large number of unknowns and the strong nonlinear interactions. Thus, there is a great need for upscaling methods of compositional processes. The complex multiscale interactions between the phase behavior and the heterogeneities lie at the core of the difficulty in constructing consistent upscaling procedures.
We use a mass-conservative formulation and introduce upscaled phase-molar-mobility functions for coarse-scale modeling of multiphase flow. These upscaled flow functions account for the subgrid effects caused by the absolute permeability and relative permeability variations, as well as the effects of compressibility. Upscaling of the phase behavior is performed as follows. We assume that instantaneous thermodynamic equilibrium is valid on the fine scale, and we derive coarse-scale equations in which the phase behavior may not necessarily be at equilibrium. The upscaled thermodynamic functions, which represent differences in the component fugacities, are used to account for the nonequilibrium effects on the coarse scale. We demonstrate that the upscaled phase-behavior functions transform the equilibrium phase space on the fine scale to a region of similar shape, but with tilted tie-lines on the coarse space. The numerical framework uses K-values that depend on the orientation of the tie-lines in the new nonequilibrium phase space and the sign of upscaled thermodynamic functions.
The proposed methodology is applied to challenging gas-injection problems with large numbers of components and highly heterogeneous permeability fields. The K-value-based coarse-scale operator produces results that are in good agreement with the fine-scale solutions for the quantities of interest, including the component overall compositions and saturation distributions.
Evaluation of Terpolymer-Gel Systems Crosslinked by Polyethylenimine for Conformance Improvement in High-Temperature Reservoirs
Authors: Zhu Daoyi , Hou Jirui , Chen Yuguang , Wei Qi , Zhao Shuda , Bai Baojun 
Published: January 2019

SummaryA terpolymer-gel system using low toxic polyethylenimine (PEI) as the crosslinker was developed for conformance improvement in high-temperature reservoirs. Suitable gelation time (GT), gel strength, and thermal stability could be obtained by selecting PEI molecular weight and adjusting terpolymer concentrations. With the increase of terpolymer concentration, GT decreases and the gel strength increases. However, in this research, the effect of PEI concentration on the gelation performance was much less obvious than that of the polymer concentration. Very low concentrations of sodium chloride (NaCl) can slightly shorten the GT. After critical concentrations were reached, the authors determined that the ions will delay the crosslinking reaction. Moreover, the addition of sodium carbonate (Na2CO3) can also lengthen GT. The gel systems were able to maintain thermal stability at 150°C. Uniformly distributed 3D network microstructures and the small size of the gel-grid pores made the network structure maintain thermal stability. The use of the terpolymer-gel-system gelation mechanism crosslinked by PEI can help petroleum engineers better understand and apply this terpolymer-gel system.
An Intelligent Solution to Forecast Pressure Drop in a Vertical Well Having Multiphase Flow Using Functional Network Technique
Authors: Tariq Zeeshan , Mahmoud Mohamed , Abdulraheem Abdulazeez , Al-Shehri Dhafer , Khan Muhammad Rasheed , Janjua Aneeq Nasir 
Published: January 2019

Abstract
For a well production optimization and cost per barrel of oil reduction, it is very essential to have an accurate measurement of well flowing bottom-hole pressure (FBHP) available all the time during the life of the well. It is a common practice follow in the oil and gas industry to run bottom-hole pressure gauges to record FBHP. However, interfering a producing well is an expensive and time-consuming task, involved with production disruptions and safety risks. To address these concerns, numerous mechanistic and empirical models were formulated to predict FBHP. Among these a large number of models were developed under small laboratory scale conditions and are, ultimately, inaccurate when up-scaled to field conditions.
This study presents an intelligent solution by the development of an empirical model to quantify FBHP for a vertical well. The new model is based on the surface production data such as tubing perforation depth, flow rate of oil, flow rate of gas, flow rate of water, API gravity of oil, tubing string internal diameter, well bottom-hole temperature, wellhead surface temperature, and wellhead pressure. The data used to train the proposed empirical model collected from the published sources, which covered practically reasonable values. The proposed model is also validated by testing against new dataset, and the results were then compared statistically with the other methods used in petroleum industry. The results show that the proposed empirical model considerably outperforms reviewed models and delivers the prediction of FBHP with high accuracy.
The novelty of the proposed empirical model is that it depends only on the surface production which makes the prediction of FBHP in a real time. The proposed model is accurate and can serve as a handy tool for the production engineers to forecast the FBHP in a real time.
Change Of BOE Conversion Factor with Reservoir Pressure Depletion - A Case Study Of XYZ Field
Authors: Hasan Shahid M. , Saeed Akhtar M. , Kumar Sharven , Shakeel M. , Shakeel Mariam , Tanveer Atif 
Published: January 2019

Abstract
The objective of this paper is to investigate the impact of BOEs (Barrel of Oil Equivalent) conversion factor for Gas and LPG with reservoir pressure depletion on production and reserves figures with reference to Petroleum Resources Management System (PRMS) guidelines. In general, it is a common practice of E&P (Exploration & Production) companies to use same BOEs conversion factor for Gas (especially wellhead) and LPG throughout the life of reservoir. However it is understood that Gas and LPG composition plays a vital role on conversion factors of BOEs used which has an impact on the wellhead production figures, well head reserves booking, field economical limit and etc.
In this paper, "XYZ" field is considered to evaluate the impact of BOE conversion factor on wellhead gas and LPG. The "XYZ" field is producing gas condensate from HPHT (High Pressure & High Temperature) fractured carbonate and clastic reservoirs in upper Indus basin of Pakistan. The field was discovered in early 1990’s and produced ~ 70 BSCF of gas till to-date. The standard BOE gas conversion factor for "XYZ" field is 5.80 MSCF/STB which gives 1,224 BOEPD on current production data and expected remaining recovery of around 40 MMBOE. The recent BOE conversion factor based on current gas analysis is found to be 4.46 MSCF/STB that translates 1,500 BOEPD and expected remaining recovery of 46 MMBOE based on average reservoir wise BOE conversion factor of 5.13 MSCF/STB.
LPG is based on 70% propane & 30% butane, therefore its fixed composition restrict us to use a BOE conversion factor in the range of 11.60 to 11.84 MT/D.
BOE estimation and results in this paper conclude that the change of BOE factor depend upon the change in gas composition with production history at wellhead and depletion in reservoir pressure.
Based on this working, wellhead production figures, well head reserves booking and etc for XYZ field have been revised. This also dictates the importance of booking these figures at sale condition.
Reservoir Modeling of Lam Sands (Madbi Formation) using Seismic Inversion with Core and Log Data analysis in Prospect D Field, Block 18, Sab’ Atyan Basin – Yemen
Authors: Saleh Ahmed , Al Maktari Amin , Alogily Abdulkhalek , Haygana Adel , Al Adhashi Jaber , Ahmad Ammar , Khan Waqar A. , Baig Muhammad Zeeshan , Jibran Ali 
Published: January 2019

Abstract
The objectives of this work were to achieve realistic reservoir modeling using seismic inversion volumes, advance petrophysical & rock typing analysis for predictive modeling of reservoir quality sands of Lam Formation. Generation of predictive scenarios for the constructed reservoir model for reduction in uncertainty. Identification of new infill well locations based on the predictive reservoir sand distribution. Reevaluation of in place volumetrics for Lam Formation in Prospect D Field. The methodology adopted to achieve the above results.
The methodology for this work contained the following steps; In the first step seismic inversion was performed on Prospect D Field 3D seismic dataset to obtain volume of clay seismic volumes and facies volume. Petrophysical rock typing combined with the core data analysis was sued to calibrate the inverted volumes by identification of clay typing. The seismic inversion volumes were integrated with the depositional settings of Lam Formation to qualitatively interpret the inverted volumes. Reservoir modeling was performed using seismic inversion facies volumes and petrophysical rock type model to predict and distribute the different depositional facies being controlled by inversion trends. Generation of In place volumes and predictive scenarios for reduction in uncertainty and attributing more predictive strength to the reservoir model.
On the basis of reservoir modeling two (2) prospective areas were observed to show good quality sand bodies which were non-tight and reflected good reservoir properties. The seismic inversion volumes captured the depositional trends within the Lam Formation showing the variation between channel complexes to reservoir quality delta sand bodies. Two (2) to Four (4) infill well locations were identified along with forecasted results which showed positive results based on the delineated prospective areas. The seismic inversion volume results, petrophysical rock typing combined with core data completely changed the field development plan by identifying new prospective areas which were not identified or interpreted previously.
Point-of-Care Measurement of Activated Clotting Time for Cardiac Surgery as measured by the Hemochron Signature Eliteand the Abbott i-STAT: Agreement, Concordance, and Clinical Reliability
Authors: Dirkmann Daniel , Nagy Elisabeth , Britten Martin Walter , Peters Juergen 
Published: January 2019

Abstract
Background: Since inadequate heparin anticoagulation and insufficient reversal can result in complications during cardiopulmonary bypass (CPB) surgery, heparin anticoagulation monitoring by point-of-care (POC) activated clotting time (ACT) measurements is essential for CPB initiation, maintainance, and anticoagulant reversal. However, concerns exist regarding reproducibility of ACT assays and comparability of devices.
Methods: We evaluated the agreement of ACT assays using four parallel measurements performed on two commonly used devices each (i.e., two Hemochron Signature Elite (Hemochron) and two Abbott i-STAT (i-STAT) devices, respectively). Blood samples from 30 patients undergoing cardiac surgery on CPB were assayed at specified steps (baseline, after heparin administration, after protamine administration) with four parallel measurements (two of each device type) using commercial Kaolin activated assays provided by the respective manufactures. Measurements were compared between identical and different device types using linear regression, Bland-Altman analyses, and calculation of Cohen’s kappa coefficient.
Results: Parallel i-STAT ACTs demonstrated a good linear correlation (r=0.985). Bias, as determined by Bland-Altman analysis, was low (-3.8s; 95% limits of agreement (LOA): -77.8 -70.2s), and Cohen’s Kappa demonstrated good agreement (kappa=0.809). Hemochron derived ACTs demonstrated worse linear correlation (r=0.782), larger bias with considerably broader LOA (-13.14s; 95%LOA:-316.3-290s), and lesser concordance between parallel assays (kappa=0.554). Although demonstrating a fair linear correlation (r=0.815), parallel measurements on different ACT-devices showed large bias (-20s; 95% LOA: -290-250s) and little concordance (kappa=0.368). Overall, disconcordant results according to clinically predefined target values were more frequent with the Hemochron than i-STAT. Furthermore, while discrepancies in ACT between two parallel iSTAT assays showed little or no clinical relevance, deviations from parallel Hemochron assays and iSTAT versus Hemochron measurements revealed marked and sometimes clinically critical deviations.
Conclusion: Currently used ACT point-of-care devices cannot be used interchangeably. Furthermore, our data question the reliability of the Hemochron in assessing adequacy of heparin anticoagulation monitoring for CPB.
Keywords: Activated clotting time, ACT, method comparison, anticoagulation, cardiopulmonary bypass, heparin, protamine