bluuebunny/crossref_metadata_2025_split huggingface dataset:
Un error de diagnóstico
Authors: Bernal B. Héctor Enrique 
Published: August 2020

El diagnóstico en Ginecología es con alguna frecuencia de una dificultad extraordinaria, especialmente en los casos agudos: congredados en la cavidad pélvica y en sus vecindades varios órganos cuyas alteraciones dan lugar a síntomas y signos en un todo semejantes, no importa que el propio dedo vaya a explorar la lesión, si los límites o las soluciones de continuidad que existen normalmente han desaparecido, para dar lugar a la masa indefinida cuyos caracteres son imposibles de precisar; pero la dificultad llega a su maximo, cuando es el síntoma dolor el que domina la escena, entonces él parece una barrera por decirlo así infranqueable
Traumatismo obstétrico en el recién nacido
Authors: Plata Rueda Ernesto 
Published: August 2020

Las lesiones pulmonares resultantes de la asfixia no figuran én los diversos tratados sobre Patología del recién nacido, dentro de los capítulo destinados al traumatismo obstétrico; pero ateniéndonos a la definición que sobre éste dimos en un principio, a la frecuente coexistencia de manifestaciones pulmonares en niño con historia obstétrica accidentada y a la no menos llamativa simultaneidad de lesiones de este tipo con serios traumatismos intracraneanos (constituyendo lo que más atrás denomináramos Síndrome neuro-pulmonar de traumatismo obstétrico no hemos dudado al incluír este capítulo de patología pulmonar en nuestro estudio sobre el traumatismo obstétrico.
Deberes y derechos médicos
Authors: De Obstetricia y Ginecologia Federación Colombiana 
Published: August 2020

En los tiempos actuales es imposible alegar derechos ilimitados no referentes a aquéllos que atañen a la dignidad humana, pues las modalidades del mundo contemporáneo de suyo son más complejas que antaño y porque el individuo no es ya un microcosmos que pueda arrogarse actitudes de soberbia independencia, sometiéndose únicamente a postulados del llamado Estado gendarme, sino que tiene que cumplir la función social indispensable a la armonía del conglomerado humano.
Observaciones con Pentotal y Curare en maternidad
Authors: Prado Villamil Joaquín 
Published: August 2020

El pentotal venenoso es un buen analgésico obstétrico. Debe usarse en embarazos a término nunca en prematuros.La dosis inicial fluctúa entre 0,15 y 0,40 gramos. La dosis de mantenimiento oscila entre 0,03 y 0,10 gramos. La dosis total llega de 0,50 a 0,70 gramos. El pentotal tiene las siguientes VENTAJAS: a) Fácil de administrar.b) Precio muy reducido.c) No necesita aparatos complicados.d) Provoca una anestesia muy agradable.e) No produce vómitos y por consiguiente no es absolutamente necesario que el estómago de la paciente esté vacío.f) La anestesia se consigue en pocos segundos, sin excitación.g) Despertar rápido y agradable.h) A la enferma le queda un buen recuerdo de su anestesia. DESVENTAJASa) De cierta dosis para arriba retarda la frecuencia de las contracciones uterinas.b) Disminuye la cantidad de las mismas.c) Acorta la duración de las contracciones. d) Es mayor la incidencia en cuanto al uso de ocitócicos.e) Provoca depresión respiratoria fetal.En consecuencia el Pentotal tampoco llena las condiciones del anestésico ideal en obstetricia. Aún está por descubrirlo.
El diagnóstico de la Salpingitis Tuberculosa con especial referencia al diagnóstico Radiológico
Authors: Wood Juan 
Published: August 2020

Debemos manifestar que las investigaciones del doctor Samuel Rozin despertaron entre nosotros un gran interés y curiosidad por tres motivos principales:
1 Primero y ante todo, por que en nuestra práctica no hemos sido partidarios del método radiológico para el diagnóstico de la Tuberculosis útero-anexial por considerarlo relativamente contraindicado; 2.— Porque disponemos de otro método más preciso en sus conclusiones, menos complicado en su ejecución y, según nuestra experiencia, completamente inofensivo: la biopsia del endometrio, 3.- Porque las investigaciones de la escuela de Israel se sumaban a las llevadas a cabo con el mismo fin por otros autores, escandinavos principalmente, quienes, basados en los resultados obtenidos, han aceptado al igual que Rozin, que el método radiológico evidencia signos en los procesos anexiales tuberculosos que permiten imponer el diagnóstico etiológico con un amplio margen de seguridad.
Promoting Technology- Implementation Learning paradigm for online learning in secondary Education
Authors: Yehya Fouad Mounier 
Published: August 2020

Online learning via educational Technology tools has been used as a paradigm shift in education to transmit knowledge and promote learners’ engagement in secondary learning environments. The emotional, behavioral and the cognitive facets of engagement play an important role in the learning process and social development. Learner engagement refers to the degree of attention, focus, belief, interest, and emotions that motivate learners successfully to practice higher-level critical thinking skills, and to promote meaningful learning experiences to achieve the course’s learning objectives and progress in their education. In this paper, the technology-implementation learning paradigm is proposed for the purpose of promoting learners’ engagement in online learning. This proposed paradigm is composed of four interacted fundamental dimensions, Attitude dimension, pedagogical dimension, social dimension, and technical dimension (APTS) that lead to engage learners emotionally, behaviorally and cognitively in technology-supported learning environment. Attitude dimension is the intentions and the perspectives to understand, interact and manage emotional skills and abilities needed by technology users for the effective usage of educational technology tools. Pedagogical dimension is the active learning process for cognitive development using pre-defined learning objectives and pedagogical theories to identify learning strategies and assessments to achieve planned educational outcomes. Technical dimension intends to create a computer and media literacy that allow learners and instructors to employ online learning without technical difficulties. Social dimension is to create a technology cooperation where learners are Networking with other learners and willing to share positively their experiences with peers and/or with the teacher to attain their emotional, social and cognitive engagement and keeps them motivated, and even inspired.
PERBANDINGAN MODEL ACCELERATED FAILURE TIME DAN MODEL COX PROPORTIONAL HAZARD PADA KASUS KARDIOVASKULAR
Authors: Fatmala Siti Febriana , Fatekurohman Mohamat , Hadi Alfian Futuhul 
Published: August 2020

Cardiovascular disease is a disease that attacks the heart and blood vessels. Many types of cardiovascular diseases, but the most famous are coronary heart disease and stroke. Coronary heart disease is a disease that is the first cause of death that occurs in the world caused by risk factors and the length of time of survival of coronary heart disease patients, then using survival analysis with the Cox Proportional Hazard model and Accelerated Failure Time model. Comparison between Cox Proportional Hazard model and Accelerated Failure Time model expedited time can be determined by the survival time with a safe function, the hazard function and density function (comparison of income) of each questioned duration of time with the help of different AIC policies and the rate of deterioration. Estimation of the survival time of this cardiovascular case is determined from the Cox Proportional Hazard’s hazard ratio model and the Accelerated Failure Time’s time ratio model. The results showed that the Accelerated Failure Time model was better than the Cox Proportional Hazard model because the rate of deterioration and the AIC value was smaller than the other models and related to risk factors, namely the age and status of diabetes mellitus and the length of survival of the patient for 11 days obtained from the estimation of the survival time distribution between the Cox Proportional Hazard model and the Accelerated Failure Time model.
Keywords: Coronary heart disease, survival analysis, Cox Proportional Hazard, Accelerated Failure Time
PENYANDIAN CITRA MENGGUNAKAN ALGORITMA 4D PLAYFAIR CIPHER DENGAN PEMBANGKITAN KUNCI MODIFIKASI LINEAR FEEDBACK SHIFT REGISTER
Authors: Rahayu Rivi Tri , Riski Abduh , Kamsyakawuni Ahmad 
Published: August 2020

The fast development of sophisticated technology make it easier for someone to send a message to other but can also make it easier for third parties to sabotage the content of the message, so a technique called cryptography is needed to secure the message. Image encoding is one of the techniques for securing messages in cryptography. In enhancing security in image encoding, this study discusses about Playfair Cipher, 3D Playfair Cipher and 4D Playfair Cipher with key generation using LFSR Modification. The encryption process using 4D Playfair Cipher with key generation using LFSR Modification visually produces cipher image that is different from the original image compared to using Playfair Cipher and 3D Playfair Cipher. In the decryption process using Playfair Cipher, 3D Playfair Cipher and 4D Playfair Cipher-Modification LFSR can return cipher image to its original image. The result of the study shows that the proposed method can be used to secure the message.
Keywords: Playfair Cipher, 3D Playfair Cipher, 4D Playfair Cipher, LFSR
PERBANDINGAN ALGORITMA PARTICLE SWARM OPTIMIZATION (PSO) DAN ALGORITMA GLOWWORM SWARM OPTIMIZATION (GSO) DALAM PENYELESAIAN SISTEM PERSAMAAN NON LINIER
Authors: Azmi Ana Ulul , Hidayat Rusli , Arif M Ziaul 
Published: August 2020

Non-linear equation system is one of the mathematics problems which difficult to solve. Several methods have been introduced to solve the problems. Newton-Raphson method is the most common and widely used as the basis for evolving the latest numerical methods. However, this method requires the derivative of each equation with respect to every variable when calculating the Jacobian. Naturally, obtaining the derivative is challenging in certain cases. In addition, it needs a proper initial value to obtain the converged solution. Therefore, the new technique with a simple random initial value is urgently needed. In this study, it is shown the implementation of the two metaheuristic optimization methods, including Particle Swarm Optimization (PSO) and the Glowworm Swarm Optimization (GSO) to estimate the solution of a non-linear equation system. Several examples of nonlinear equation system were used for evaluating and testing the performance and the accuracy of both algorithms. In this simulation, the results show that PSO converged to the exact solution (global optimum) better than Glowworm Swarm Optimization (GSO).
Keywords: Non-Linear Equation Systems, Particle Swarm Optimization (PSO), Glowworm Swarm Optimization (GSO)
PENYELESAIAN MODIFIKASI MODEL PREDATOR PREY LESLIE-GOWER DENGAN SEBAGIAN PREY TERINFEKSI MENGGUNAKAN ADAMS BASHFORTH MOULTON ORDE EMPAT
Authors: Arianti Liatri , Hidayat Rusli , Purnomo Kosala Dwija 
Published: August 2020

Eco-epidemiology is a science that studies the spread of infectious diseases in a population in an ecosystem where two or more species interact like a predator prey. In this paper discusses about how to solve modification Leslie Gower of predator prey models (with Holling II response function) with some prey infected using fourth order Adams Bashforth Moulton method. This paper used a simple disease-spreading model that is Susceptible-Infected (SI). The model is divided into three populations: the sound prey (which is susceptible), the infected prey and predator population.
Keywords: Adams Basforth Moulton, Eco-epidemiology Holling Tipe II, Local stability, Leslie-Gower, Predator-Prey model
PENERAPAN ALGORITMA PENGUINS SEARCH OPTIMIZATION (PeSOA) DAN ALGORITMA MIGRATING BIRDS OPTIMIZATION (MBO) PADA PERMASALAHAN KNAPSACK 0-1
Authors: Abdullah Rinaldy Ahmad , Riski Abduh , Kamsyakawuni Ahmad 
Published: August 2020

Every person would want maximum profit with as little as possible resources or capital. One example in everyday life is the problem of limited storage media but is required to get the maximum benefit. From this problem comes the term known as the knapsack problem. One of the problems with Knapsack is knapsack 0- 1, where knapsack 0-1 is a problem of storing goods where the item will be completely inserted or not at all. Completion of knapsack 0-1 problems can be helped using a metaheuristic algorithm. Metaheuristic algorithms include the Penguins Search Optimization (PeSOA) algorithm and the Migration Birds Optimization (MBO) algorithm. This study aims to determine the resolution of knapsack 0-1 problems using the Penguins Search Optimization (PeSOA) algorithm and the Migration Birds Optimization (MBO) algorithm and compare the optimal solutions obtained. This research method is divided into three main parts. First take data that includes the name of the item, the purchase price, the selling price and the weight of each item. The second is applying the Penguins Search Optimization (PeSOA) algorithm and the Migration Birds Optimization algorithm (MBO) on 0-1 knapsack problems. The third program is made to facilitate the calculation of data with the help of Matlab R2015b software. The results of this study found that both algorithms both reached the optimal solution, but the convergence and running time obtained were different. The Migrating Birds Optimization (MBO) algorithm is faster converging than the Penguins Search Optimization (PeSOA) algorithm to get the optimal solution. And also the Migrating Birds Optimization (MBO) algorithm has better running time than the Penguins Search Optimization (PeSOA) algorithm to achieve maximum iteration.
Keywords: Whale optimization algorithm, multi knapsack 0-1 problem with multiple constraints.
Measurement of Oil-Gas Diffusivity at Reservoir Conditions for Huff-n-Puff EOR in Shales
Authors: Mukherjee Sanchay , Dang Son T. , Rai Chandra S. , Sondergeld Carl H. 
Published: August 2020

Abstract
Due to the extremely low permeability and high depletion rate, primary recovery from unconventional reservoirs is generally low. Huff-n-puff has proved to be a successful EOR technique in tight formations, such as the Eagle Ford. However, the underlying transport mechanism remains to be completely understood. Recent studies show oil-gas diffusion is a key factor for the success of huff-n-puff EOR. Due to concentration gradient, injected gas molecules diffuse into in-situ oil causing it to swell and consequently to be expelled out of the nanopores into the micro- and macro- fractures.
Our research group has designed an experiment with a high pressure-high temperature cell having observation windows for the measurement of oil swelling and diffusivity in oil-gas mixtures and in this study, we present some preliminary results. The measurements were done on a Meramec oil (API-42.7) with 3 different gas mixtures of methane – ethane, at a temperature of 175°F to evaluate the impact of injection pressure (above and below Minimum Miscibility Pressure-MMP) and injectate composition on oil-gas diffusivity. The diffusivity of injectate gas into oil phase as a function of pressure increases to maximum at MMP, beyond which it decreases. Using pure methane (MMP = 5500 psi) as the injectate, the diffusion coefficient increases by 250% on increasing the pressure from 2500 psi to 5500 psi and then decreases. Based on the data available in the literature, this decrease in diffusivity can be explained by the increase in bulk fluid density and viscosity. For the oil sample used in this study, the diffusion coefficient varies between 10−10 m2/s to 10−9 m2/s, regardless of pressure and injectate composition.
Tight reservoirs generally have high matrix tortuosity, which impacts the diffusion efficiency in the porous media. Using tortuosity values available in the literature and diffusivities of oil gas systems measured in this study, we estimate that the injected gas can only travel 0.2-0.75 ft away from the fracture-faces in 1-6 months of injection. This study highlights the importance of stimulated reservoir area (SRA) characterization, nanoporous tortuosity and diffusivity measurements to optimize huff-n-puff recovery in shales.
Scleroglucan Polymer Injectivity Test Results in the Adena Oilfield
Authors: Muhammed Farag , Dean Elio , Pitts Malcolm , Wyatt Kon , Kozlowicz Briana , Khambete Malhar , Jensen Tryg , Sumner Eric , Ray Charles 
Published: August 2020

Abstract
Reservoirs with harsh environments are now being routinely evaluated for applications of chemical EOR. High temperatures and high salinity water are proving to be hurdles chemical manufacturers must overcome. Scleroglucan is a biopolymer with robust viscosifying power, excellent stability under high temperature, high salinity, and resistance to shear. An injectivity test was conducted in the high temperature (180 °F) Adena oilfield to evaluate the injectivity of scleroglucan polymer.
Field injectivity test results are compared to those from the laboratory. Polymer parameters evaluated include polymer viscosity, polymer shear, resistance factor, and residual resistance factor.
The unique feature of this injectivity test is the bottom-hole pressure data that allowed for direct field measurement of resistance factor and the evaluation of multiple fall off tests. Pressure transient analysis (PTA) allowed for (1) skin to be measured before and after polymer injection to evaluate sand face plugging, and (2) permeability measurements that were used for direct field measurement of residual resistance factor.
Conclusions from the injectivity test in the Adena field are: Scleroglucan was successfully injected into a harsh reservoir environment. PTA data provided a field based direct measurement of resistance factor (RF) and residual resistance factor (RRF).PTA fall off test indicated no sand face plugging, in that a constant skin was observed at the well before and after the polymer injectivity test.RRF was measured at the sand face via FBHP and several feet into the reservoir via PTA. Sandface RRF was 1.3, indicating a 25% reduction in permeability, while PTA based permeability (larger radius of investigation) was reduced by 50%, the equivalent of a RRF of 2.Skin for the two fall off tests, before and after polymer injection, show the polymer did not plug nor exacerbate the pre-existing formation damage.
The first field injection of EOR–grade scleroglucan was successful. The use of BHP data and fall off testing allowed for field-based values of resistance factor and residual resistance factor to be measured.
Typically, these parameters are laboratory derived values and uncertainty exists when scaling up the process. The use of pressure transient analysis in polymer injectivity tests offers an economical option for field evaluation of polymer based EOR technologies.
Measurement of Transport Properties and Densities of Dimethyl Ether DME and Water/Brine Mixtures
Authors: Cui Jingyu , Qi Yunying , Dindoruk Birol 
Published: August 2020

Abstract
Dimethyl ether (DME) is considered to be a potential Enhanced Oil Recovery EOR agent for enhanced waterflooding. Due to its first contact miscibility in hydrocarbons and partial high solubility in water/brine, it partitions preferentially into the hydrocarbon phase upon contact when DME-brine solution is injected into the reservoir. As a result, the residual oil swells and its viscosity is reduced which in turn leads to significantly higher ultimate oil recovery. The amount of swelling and viscosity-reduction depends on the extent of DME partitioning and its availability along with the systems pressure and temperature. In the DME-oil mixing zone, and DME-water zone, the estimation of the DME-Hydrocarbon and DME-water viscosities is crucial to evaluate and understand the performance of DME-enhanced waterflooding (DEW) at reservoir or lab/pilot-scale. Among those, there is no systematic viscosity data found for DME-brine systems, especially for the condition of interest (reservoir conditions). Viscosity of DME-Hydrocarbon follows the traditional mixing rules and expectations quite well; while viscosity of DME-water shown to exhibits very different behavior than expected. In this paper, we present new data on the systematic density and viscosity measurements for DME and Water for the first time. Such essential transport data is necessary to be able to evaluate the DME/DEW injection potential for various applications, from EOR/IOR to near wellbore stimulation.
Some of the important features of this study are:
New data for the literature to be used for DME and DME enhanced waterflooding Correlation development for the measured data.
Joint Optimization of Well Completions and Controls for CO2 Enhanced Oil Recovery and Storage
Authors: Chen Bailian , Pawar Rajesh 
Published: August 2020

Abstract
CO2 storage through CO2 enhanced oil recovery (EOR) is considered as one of the technologies to help promote larger scale deployment of CO2 storage because of associated economic benefits through oil recovery, 45Q tax credits and the utilization of existing infrastructure. The objective of this study is to demonstrate how optimal reservoir management and operation strategies (including well completions and controls) can be used to optimize both CO2 storage and oil recovery.
The optimization problem was focused on jointly estimating the well completions (i.e., fraction of injection/production well perforations in each reservoir layer) and CO2 injection/oil production controls that maximize the net present value (NPV) in a CO2 EOR and storage operation. We utilized the newly developed StoSAG algorithm, one of the most efficient optimization algorithms in the reservoir management community, to solve the optimization problem. The performance of joint optimization approach was compared with the performance of well control only optimization approach. In addition, the performance of co-optimization of CO2 storage and oil recovery approach was compared with the performances of maximization of only CO2 storage and maximization of only oil recovery approaches.
The optimization results showed that a joint optimization of well completions and well controls can achieve an 8.84% higher final NPV than the one obtained from the optimization of only well controls. It was observed that the NPV incremental for joint optimization is mainly due to the fact that the optimal well completions and controls approach results in efficient CO2 storage and oil production from different reservoir layers depending on the differences in individual layer properties. Comparison of co-optimization (i.e., maximization of NPV) and maximization of only CO2 storage or only oil recovery showed that the co-optimization and maximization of only oil recovery result in significantly higher final NPV than that obtained through maximization of only CO2 storage approach while maximization of only CO2 storage can achieve significantly higher CO2 storage in the reservoir compared to the other two scenarios. The similar results for co-optimization and maximization of oil production are obtained because of the difference in oil revenue compared to CO2 storage tax credit.
To the best of our knowledge, this is the first study in oil/gas industry and CO2 storage community to perform joint optimization of well completions and well controls in the fields. We expect that the proposed optimization framework will be a useful and efficient tool for field engineers to optimally manage CO2 EOR projects to maximize revenue through oil recovery as well as CO2 storage by taking advantage of the new 45Q tax law.