bluuebunny/crossref_metadata_2025_split huggingface dataset:
What Tier Sand Should You Use for Your Well? Practical Use of Data Analytics to Determine Proppant Type and Quality
Authors: Sedillos Lia , Roundtree Russell , Saxena Jayant , Convers Carlos , Dean Elio 
Published: April 2019

Abstract
This paper presents a data driven approach to answer the question of whether premium, high strength white sand proppant, while more expensive than regional (brown) sand, is justified due to its alleged ability to make better producing wells. For this study, 739 horizontal wells with production, and stimulation data were used in a robust statistical approach to conclude that, for the most common set of well characteristics, white sand will produce a superior NPV weighted economic outcome than lower cost regional (brown) sand alternatives. While there are wells in this analysis that did not produce this robust conclusion of "white sand is better", none of them produced an outcome that "brown sand was better". Rather, several of the wells simply had results that were statistically inconclusive. This paper serves as a good example of what data are needed to perform such an analysis and the challenges of normalizing ‘first order effects’ that dominate the influence on well productivity (TVD, lateral length, and proppant intensity) while attempting to ascertain the influence of 'second order’ factors such as Sand Type. Becoming familiar and adept at these analysis methods should facilitate the statistical verification of other second order effects on finding the optimal stimulation treatment.
Uncertainty Analysis of Production Forecast in Permian Basin
Authors: Mabadeje Ademide O. , Ghanbarnezhad Moghanloo Rouzbeh 
Published: April 2019

Abstract
This paper evaluates the impact of decision making and uncertainty associated with production forecast for 2000+ wells completed in Permian basin. Existing studies show that unconventional reservoirs have complex reservoir characteristics making traditional methods for ultimate recovery estimation insufficient. Based on these limitations, uncertainty is increased during the estimation of reservoir properties, reserve quantification and, evaluation of economic viability. Thus, it is necessary to determine and recommend favorable conditions in which these reservoirs are developed.
In this study, cumulative production is predicted using four different decline curve analysis (DCA) − power law exponential, stretched exponential, extended exponential and Duong models. A comparison between the predicted cumulative production from the models using a subset of historical data (0-3months) and actual production data observed over the same time period determines the accuracy of DCA's; repeating the evaluation for subsequent time intervals (0-6 months, 0-9 months,) provides a basis to monitor the performance of each DCA with time. Moreover, the best predictive models as a combination of DCA's predictions is determined via multivariate regression. Afterwards, uncertainty due to prediction errors excluding any bias is estimated and expected disappointment (ED) is calculated using probability density function on the results obtained.
In this paper, uncertainty is estimated from the plot of ED versus time for all wells considered. ED drops for wells having longer production history as more data are used for estimation. Also, the surprise/disappointment an operator experiences when using various DCA methods is estimated for each scenario. However, it appears that whilst Duong (DNG) method always overpredicts, power law exponential (PLE) decline mostly under predicts, the stretched exponential lies between DNG & PLE estimates and the extended exponential DCA demonstrates an erratic behavior crossing over the actual trend multiple times with time. In conclusion, profitability zones for producing oil in the Permian basin are defined implicitly based on drilling and completion practices which paves the path to determine the "sweet spot" via optimization of fracture spacing and horizontal length in the wells.
The outcome of the paper helps improve the industry's take on uncertainty analysis in production forecast, especially the concept of expected disappointment/surprise. This study suggests that effects of bias due to decision making can be much greater than what has often regarded, which can change the performance evaluation of the Permian basin in terms of economic feasibility.
Multiplex Polymerase chain reaction to diagnose bloodstream infections in patients after cardiothoracic surgery
Authors: Pilarczyk Kevin , Rath Peter-Michael , Steinmann Jörg , Thielmann Matthias , Dürbeck Maximillian , Padosch Stephan A. , Jakob Heinz G. , Dusse Fabian 
Published: April 2019

Abstract
Background: Sepsis and other infectious complications are major causes of mortality and mor-bidity in patients after cardiac surgery. Whereas conventional blood culture (BC) suffers from low sensitivity as well as a reporting delay of approximately 48–72 h, real-time multiplex poly-merase chain reaction (PCR) based technologies like “SeptiFast” (SF) might offer a fast and reliable alternative for detection of bloodstream infections (BSI). The aim of this study was to compare the performance of SF with BC testing in patients suspected of having BSI after cardi-ac surgery.
Methods: 279 blood samples from 168 individuals with suspected BSI were analyzed by SF and BC. After excluding results attributable to contaminants, a comparison between the two groups were carried out. Receiver operating characteristic (ROC) curves were generated to de-termine the accuracy of clinical and laboratory values for the prediction of positive SF results.
Results: 14.7% (n = 41) of blood samples were positive using SF and 17.2% (n=49) using BC (n.s. [p>0.05]). In six samples SF detected more than one pathogen. Among the 47 microorgan-isms identified by SF, only 11 (23.4%) could be confirmed by BC. SF identified a higher num-ber of Gram-negative bacteria than BC did (28 vs. 12, χ2=7.97, p=0.005). The combination of BC and SF increased the number of detected microorganisms, including fungi, compared to BC alone (86 vs. 49, χ2=13.51, p<0.001). C-reactive protein (CRP) (21.7±11.41 vs. 16.0±16.9 mg/dl, p=0.009), procalcitonin (28.7±70.9 vs. 11.5±30.4 ng/dl, p=0.015), and interleukin 6 (IL 6) (932.3±1306.7 vs. 313.3±686.6 pg/ml, p=0.010) plasma concentrations were higher in patients with a positive SF result. Using ROC analysis, IL-6 (AUC 0.836) and CRP (AUC 0.804) showed the best predictive values for positive SF results.
Conclusion: The SF test represent a valuable method for rapid etiologic diagnosis of BSI in patients after cardiothoracic surgery. In particular this method applies for individuals with sus-pected Gram-negative blood stream. Due to the low performance in detecting Gram-positive pathogens and the inability to determine antibiotic susceptibility, it should be used in addition to BC only.
Negative pressure pulmonary edema: a case report
Authors: Xiong Jun , Sun Yongxing 
Published: April 2019

Abstract
Background: The negative pressure pulmonary edema is rare clinical situation which caused mainly by upper airway obstruction. However except upper airway obstruction, there may be other pathophysiological disorders making patients more vulnerable to pulmonary edema. Based on these disorders, upper airway obstruction is the trigger to induce negative pressure pulmonary edema.
Case presentation: This case was a 5-year-old girl with tumor on saddle area, her hormones level were abnormal preoperatively, such as cortisol, adrenocorticotrophic hormone, free T4 and total T4. During the stage of induction, negative pressure pulmonary edema took place due to mild upper airway obstruction. And the instant chest Computer tomography proved diagnosis clue. After intensive care, most lung field of this girl recovered to normal within 48 hours.
Conclusion: The patient with abnormal hormone levels is vulnerable to pulmonary edema, mild upper airway obstruction triggered negative pressure pulmonary. Thus pre-operation hormones supplement is as important as keeping upper airway unobstructed.
Electric vagal nerve stimulation inhibits inflammation and improves early postoperation cognitive dysfunction in aged rats
Authors: Xiong Jun , Wang Huijun , Bao Yin , Guo Yuliang , Sun Yongxing 
Published: April 2019

Abstract
Background This study aimed to evaluate effects of electric vagal nerve stimulation on early postoperation cognitive dysfunction in aged rats.
Methods: A total of 33 male Sprague Dawley (SD) rats were selected and assigned randomly to three groups, control group (C, n=10), splenectomy group (S, n=10) and splenectomy+vagal nerve stimulation group (SV, n=13). Behavior and memory of rats were evaluated by Open Field Test and Morris Water Maze. Levels of TNF-α, IL-6 and IL-10 in serum were measured by ELISA. The level of TNF-α protein in hippocampus was assessed by Western blotting. qPCR was used to detected mRNA expression of NF-κB in hippocampus.
Results: During anesthesia/operation, vital life signs of rats were stable. In SV group, vagal nerve stimulation decreased heart rate lower than 10% of basic level and kept it at a stable range by regulating stimulation intensity. After stimulation stop, heart rate returned to the basic level again. This indicated that the model of vagal nerve stimulation was successful. Serum levels of TNF-α and IL-6 increased by the operation/anesthesia, but they decreased with vagal nerve stimulation (all P<0.05). TNF-α protein and mRNA expression of NF-κB in hippocampus were also eliminated by vagal nerve stimulation compared to S group (P<0.05). Results of Morris Water Maze showed escape latency of postoperation in S group was significantly longer than C group (P<0.05), and times of crossing platform in S group was lower than that of C group (P<0.05). Although escape latency of postopration in SV group was shorter than that of S group, there was no significant difference between two groups. Meanwhile there were no significant differences of behavior test in Open Field test between three groups, although vagal nerve stimulation improved partly active explore behavior compared to S group.
Conclusion The inflammation caused by operation and general anesthesia was an important reason of early postoperation cognitive dysfunction, and electric vagal nerve stimulation could inhibit the inflammation. Meanwhile, vagal nerve stimulation could ameliorate early postoperation cognitive dysfunction partly, but its protective effects were not enough and should be studied and improved in future.
Caracterización Composicional y de Resistencia a las Calizas Explotadas en las Minas del Municipio de Bosconia, en el Departamento del Cesar
Authors: Atencio Guerrero María José , Britto López Yassuana 
Published: April 2019

En el municipio de Bosconia, departamento del Cesar se encuentran en superficie rocas sedimentarias, las cuales están siendo extraídas por diferentes canteras tales como Minera de los Santos, Cantera Midas y Eliseo Cañón para su aprovechamiento industrial. En este artículo se determinaron mediante ensayos de fluorescencia de rayos x los diferentes usos de las Calizas aflorantes en dichas canteras, por medio de estos ensayos se evidencio que las calizas encontradas en la zona poseen una concentración de calcio entre 94.39% y 45.45%, sílice entre 35% y 2.88% y otros como Fe, K, Al, Mg y S que no superan el 1%; según las normas NTC 4915 [11] (ICONTEC) equivalente a la ASTM C 911-99 [4], la utilidad de las rocas extraídas en la mina Eliseo Cañón y Minera de los Santos es para descalcificación de agua, tratamiento de aguas e hipoclorito (blanqueador), y para pulpa de papel solo las de Eliseo Cañón. De igual forma se realizaron ensayos de compresión uniaxial, arrojando valores de compresión uniaxial: 6.3Mpa; 5.9Mpa; 4.9Mpa respectivamente.
Análisis de residuos sólidos de palma africana, como alternativa de aprovechamiento de energías renovables en el departamento del Cesar
Authors: Torres Pérez Carolina Isabella , Quintero Lopez Luis Alberto 
Published: April 2019

La demanda actual energética y los costos en energía van incrementando; la contaminación da necesidad a la utilización de energías limpias que impacten en menor medida el medio ambiente. Colombia al encontrarse ubicado en zona rica con climas, biodiversidad y ecosistemas variados, cuenta con gran potencial de energías renovables del aire, agua, sol y biomasa de residuos sólidos como los de palma de africana; hoy en día el 70% de energía se produce de hidroeléctricas y solo el 2% del país genera energías renovables. A pesar que Colombia es un país con gran potencial de biomasa y residuos agroindustriales no se aprovecha su potencial como materia prima en procesos alternos de conversión de energía tales como los procesos termoquímicos. Así mismo el departamento de Cesar cuenta con un potencial de 1.935,51 (TJ/Año) y una generación de residuos anuales de 209.759,99 Ton de Biomasa residual, con un potencial energético de biomasa disponible para su aprovechamiento. De esta manera, es posible establecer por medio de los resultados de investigación el uso de estos residuos en aplicaciones térmicas que conlleven a la generación de energía limpias en la región y el país.
Utilization of Patient-Generated Data Collected Through Mobile Devices: Insights From a Survey on Attitudes Toward Mobile Self-Monitoring and Self-Management Apps for Depression
Authors: Hartmann Ralf , Sander Christian , Lorenz Noah , Böttger Daniel , Hegerl Ulrich 
Published: April 2019

Background
Depression is a severe psychiatric disease with high prevalence and an elevated risk for recurrence and chronicity. A substantial proportion of individuals with a diagnosis of unipolar depressive disorder do not receive treatment as advised by national guidelines. Consequently, self-monitoring and self-management become increasingly important. New mobile technologies create unique opportunities to obtain and utilize patient-generated data. As common adherence rates to mobile technologies are scarce, a profound knowledge of user behavior and attitudes and preferences is important throughout any developmental process of mobile technologies and apps.

Objective
The aim of this survey was to provide descriptive data upon usage and anticipated usage of self-monitoring and self-management of depression and preferences of potential users in terms of documented parameters and data-sharing options.

Methods
A Web-based survey comprising 55 questions was conducted to obtain data on the usage of mobile devices, app usage, and participant’s attitudes and preferences toward mobile health apps for the self-monitoring and self-management of depression.

Results
A total of 825 participants provided information. Moreover, two-thirds of the sample self-reported to be affected by depressive symptoms, but only 12.1% (81/668) of those affected by depression have ever used any mobile self-monitoring or self-management app. Analysis showed that people want personally relevant information and feedback but also focus on handling sensitive data.

Conclusions
New mobile technologies and smartphone apps, especially in combination with mobile sensor systems, offer unique opportunities to overcome challenges in the treatment of depression by utilizing the potential of patient-generated data. Focus on patient-relevant information, security and safe handling of sensitive personal data, as well as options to share data with self-selected third parties should be considered mandatory throughout any development process.
Factors Associated with Sustained Exergaming: Longitudinal Investigation
Authors: O'Loughlin Erin Kathleen , Barnett Tracie A , McGrath Jennifer J , Consalvo Mia , Kakinami Lisa 
Published: April 2019

Background
Exergaming is technology-driven physical activity (PA) which, unlike traditional video game play, requires that participants be physically active to play the game. Exergaming may have potential to increase PA and decrease sedentary behavior in youth, but little is known about sustained exergaming.

Objective
The objectives of this study were to describe the frequency, correlates, and predictors of sustained exergaming.

Methods
Data were available in AdoQuest (2005-11), a longitudinal investigation of 1843 grade 5 students in Montréal, Canada. This analysis used data from grade 9 (2008-09) and 11 (2010-11). Participants at Time 1 (T1; mean age 14 years, SD 0.8 ) who reported past-week exergaming (n=186, 19.1% of AdoQuest sample) completed mailed self-report questionnaires at Time 2 (T2; mean age 16 years, SD 0.8). Independent sociodemographic, psychological, and behavioral correlates (from T2)/predictors (from T1 or earlier) were identified using multivariable logistic regression.

Results
Of 186 exergamers at T1, 81 (44%) reported exergaming at T2. Being female and having higher introjected regulation (ie, a type of PA motivation indicative of internalizing PA as a behavior) were independent correlates. None of the predictors investigated were associated with sustained exergaming.

Conclusions
Almost half of grade 9 exergamers sustained exergaming for 2 years. Exergaming may be a viable approach to help adolescents engage in and sustain PA during adolescence. Sex and PA motivation may be important in the sustainability of exergaming.
Pendekatan Sosio-Ekonomi Potensi Daerah sebagai Pusat Ekstrak Kulit Manggis di Indonesia
Authors: Muchtaridi Muchtaridi , Nurhidayah Wiwit , Rochdiani Dini , Setyawati Luthfi U , Islamiyati Risda R , Budiman Arif , Qosim Warid Ali 
Published: April 2019

ABSTRACT One of the largest mangosteen producing areas in Tasikmalaya Regency, which is in 8 villages in Puspahiang Sub-district. Mangosteen farmers Puspahiang district relies on export quality because the price is 3 times more expensive. However, due to farmers' pursuit of mangosteen the quality of exports of farmers will be much to remove the mangosteen fruit harvest that does not enter the quality of exports such as too small fruits or infected yellow sap disease. In addition, if the mangosteen reached in end season, mangosteen farmers in Puspahiang will switch to other livelihoods. Mangosteen pericarps has been used by generations as a medicine. Socio-economic study to community in the form of the introduction of ECO-friendly technology (TTG) Mangosteen extraction has been aimed to determine the response of mangosteen farmers in Puspahiang in the development of the Mangosteen Extract Center for the needs of the Herbal and Nutrition Medicine industries. The survey method was carried out, socialization, pre-test and post-test. Data were analyzed by descriptive statistics. The socio-economic survey showed that the Puspahiang community is almost 100% in agreement with the construction of the mangosteen leather extrator center. However, 60% of the public is concerned about the processing of waste extracts. Subsequently, it needs to be done waste treatment studies on the socio-economic community. Keywords: extract; mangosteen pericarps; Puspahiang; socio-economic.
Transfer Teknologi Produksi Natural Soap-Base untuk Kreasi Sabun Suvenir
Authors: Asnani Ari , Delsy Eva Vaulina Yulistia , Diastuti Hartiwi 
Published: April 2019

ABSTRACT IPTEKS-based community service has been done with the Entrepreneurship and Workshop unit of MAN Purbalingga. The objectives of the activities were (1) Transferring of soap making technology to produce natural soap-base; (2) Transferring of cold-process and hot-process methods for the creation of soap-souvenirs with various shapes and colors; and (3) Transferring the packaging knowledge for souvenir soap products. The methods applied include student education, training, and the diffusion of science and technology to produce souvenir soap. The post-test results showed that there was an increased knowledge of the partners on saponification reactions (0% to 50%), soap making principles (0% to 54.2%), as well as the understanding of raw materials, additives, and soap-making equipment. The three main factors that could encourage the partners to make soap were an eagerness on how to make soap (70.8%); business opportunity (62.5%), and wanted to make soap creations (29.1%). This community service activity was expected to provide benefits in the form of partnership ability to produce souvenir soap made from natural ingredients with various shapes and colors. Keywords: cold-process, hot-process, souvenir soap
Penentuan Zona Kerentanan Longsor Berdasarkan Karakteristik Geologi dan Alterasi Batuan
Authors: Titisari Anastasia Dewi , Khul Husna Hitznaiti Zaidini' , Putra Ilham Dharmawan , Indrawan I Gde Budi 
Published: April 2019

ABSTRACT Landslide is one of the most frequent disasters in Indonesia. The occurrence of landslides is heavily controlled by geological conditions especially in areas with composed by altered rocks. Hargotirto Village, Kokap District, Kulon Progo Regency, DIY is composed by altered rocks so that many landslides occur.It is necessary, thereforeto determine the landslide susceptibility zone based on the geological characteristics and rock alteration in the area as one of disaster mitigation efforts to reduce the risk of landslide disaster. The research method used is data collection in the field such as inclination data of slope, geological condition, and land cover; and laboratory analysis such as petrographic analysis, XRD (X-Ray Diffraction) analysis, and rock geochemical analysis using ICP-AES (Inductively Coupled Plasma - Atomic Emission Spectroscopy).The collected data are used as parameters for landslide zonation determination using Analytical Hierarchy Process (AHP) method.The results showed that the lithology of the research area is andesite and porphyry diorite with alteration type of argillic and propylitic alteration. Their intensity are categorized as low to moderate alteration.Based on these conditions can be categorized into4 levels of landslide susceptibility namely the very high landslide susceptibility that dominates 35% of research areas in the north and northwest; the high landslide susceptibility of 20% spreads over the center of the study area; the moderate landslide susceptibility of 20% distributed in the center southernof the study area; and the low landslide susceptibility of 25% spread over the southern part of the study area.Therefore, residents who live in the area are advised to always be alert to the possibility of landslide because it is included in the zone of very high and high landslide susceptibility. Keywords: argillic alteration; Hargotirto; landslide susceptibility; prophyllitic alteration
Discusión teórica sobre la financiarización: marxistas, poskeynesianos y en economías subdesarrolladas
Authors: Villavicencio Giovanni , Meireles Monika 
Published: April 2019

<p>Alrededor del concepto <em>financiarización</em> hay mucho debate, justamente porque no se ha logrado conformar una definición tajante y definitiva, incluso si consideramos el seno de una misma tradición teórica. La dificultad en encontrarse un consenso entre los analistas para aclarar concluyentemente de qué se está hablando al mencionar lo que es la financiarización se agrava cuando llevamos en cuenta la multiplicidad de definiciones que emergen del abanico de autores de diversas corrientes heterodoxas que utilizan esa misma categoría, pero dándole distintos significados. Así, el objetivo de este trabajo es revisar algunas de las aportaciones más relevantes sobre la definición de financiarización, con destaque para las discusiones en tres grupos: marxistas, poskeynesianos y en economías subdesarrolladas. Siendo que en ese último grupo nos deparamos tanto con autores latinoamericanos que son marxistas y/o poskeynesianos, como con economistas heterodoxos de otras latitudes que reflexionan sobre cómo se manifiesta la financiarización en los países periféricos.</p><p> </p><div><div><p> </p></div></div>