bluuebunny/crossref_metadata_2025_split huggingface dataset:
Estimation Remaining Reserves Amount of Crude Oil and Gas on the Well X by using Volumetric Method
Authors: Ibrahim Eddy , Yusuf Maulana , Bakar Sidik Muhammad Abu 
Published: May 2020

Abstract
Volumetric is one method of calculating oil and gas reserves in reservoirs that have been used in the oil industry until now. Data sources which become the main requirements in using this method are basic data such as log data, core rocks or side terraces, area estimates, Rf and fluid properties. This method is used to obtain a forecast of the remaining reserves of Well X for future use. Based on the data limitations in Well X there is only Logging (thickness) data whose range is between 650 m and 700 m, the recovery factor is assumed to be 100% and the area of distribution of wells in one block is 13 km2. From the results of calculations using the volumetric method, the remaining reserves in well X are 320,853.63 STB and the remaining natural gas is 1,801,539.11 SCF.
Enhancement of Magnetic and Microwave Absorbing Properties of [Ba (Fe, Mn, Ti)12 O19]1-x–[CoFe12 O4] x (x = 0.2; 0.5; 0.8) Composites
Authors: Darmawan L. , Suparno  , Manaf A. 
Published: May 2020

Abstract
In this paper, we report magnetic and microwave absorbing properties of magnetic based nanocomposite, which synthesized through mechanically alloyed the magnetic crystalline powders. The first component of composite was Mn-Ti doped Barium hexaferrite(BaFe12O19) or BHF obtained through a mechanical alloying process which was mixed with the second component of mechanically alloyed the CoFe2O4magnetic compound to form composites of [Ba (Fe, Mn, Ti)12O19]1-x–[CoFe2O4]x (x = 0.2; 0.5; 0.8) compositions. Prior to composite the two magnetic components, the remanence and saturation magnetization of the components were obtained optimally. Before Mn-Ti doping, the BHF has remanence (Mr) and saturation magnetization 0.206 T and 0.42 T respectively, with the corresponding coersivity (Hc) was 263.1 kA/m. On the other hand, CoFe2O4 (CFO) which has a high saturation magnetization(0.48 T) but with a low coersivity(16.22 kA/m). In form of magnetic composite, the high remanence was almost retained, but with the coersivity value decreased further to the lowest 80.82 kA/m. These two main properties (high remanance and low coersivity) were led the composite being good candidates for microwave absorbing materials. Microwave absorbing characteristics of [Ba(Fe, Mn, Ti)12O19]1-x–[CoFe2O4]x (x = 0.2; 0.5; 0.8) composites were discussed in this paper relation with their corresponding magnetic properties for designing the best microwave absorbing materials.
The Effect of Service Quality toward Customer Satisfaction of Go-Jek Online Transportation: A Case Study of Students at Syiah Kuala University, Indonesia
Authors: Amiruddin  , Nazaruddin  , Jamil T.M. , Andika Yessi Hajri 
Published: May 2020

Abstract
This study aimed to determine the service quality and customer satisfaction of GO-JEK online transportation. This research used quantitative descriptive methods. After doing the literature and field reviews, the data in this study collected through questionnaires totaling 86 respondents. The sampling technique in this study used the incidental sampling technique. Data analysis techniques used were simple linear regression, correlation coefficient, determination, t-test to test and prove the research hypothesis. Based on the results of data analysis, the results of the study showed correlation 0.634, which means the strong correlation between variables of service quality with customer satisfaction variables. The coefficient of determination showed the effect of service quality on customer satisfaction of 0.796 or 79.6%. Furthermore, the t-test at the 5% significance level of the hypothesis was accepted, evidenced by the probability value. The conclusion from this study is that there is an influence between service quality and customer satisfaction. If the service quality provided is good, it will create customer satisfaction.
Application of Concept Physics in the Aceh Culture
Authors: Silvini Yaumil , Derlina  , Ginting Eva Marlina 
Published: May 2020

Abstract
Physics is the science that studies an object, and interactions between objects, also studies natural phenomena that include matter, space, and interactions between humans. Human interaction is related to culture and customs that are inherent in people’s lives. Every region in Indonesia has different customs and customs in the community. Aceh is one area that has diverse customs in the way of making food, playing games and using its musical instruments. The culture of people’s original knowledge relating to scientific physics knowledge is called ethnoscience. The study examines, analyzes the application of the concepts of temperature and heat and impulse momentum in Aceh culture. The method used is a literature study with study materials including (1) the cultural art game of Aceh kekuriken, (2) The typical food of Aceh tribe Pisang sale.
Static Fluid Matter Physics Experiment in High School-Based Scientific Inquiry
Authors: Siregar Yenni Amalia , Ginting E Marlina , Sirait Makmur 
Published: May 2020

Abstract
The purpose of this study was to design experimental models scientific inquiry the static fluid material which consists of four phases, [1] presenting the problem to the students, [2] the students to formulate the problem, [3]students identify problems in the investigation, [4] students find ways to overcome the difficulties. Experiments conducted by students aiming to improve student inquiry. Where the assessment results student experiment on the experiment I according to the phase [1] presenting the problem to students 71.87% [2] students to formulate the problem 79.10 [3] students identify problems in the investigation 81.23% [4] students find ways to overcome adversity 84.33%. That aspect of the investigation abilities of student based on the average value in each experiment increased.
The effects of mass variation potassium chloride (KCl) on characteristics of nanosilicone from natural sand through the magnesiothermic method
Authors: Agusman Rizky , Andriayani  
Published: May 2020

AbstractSynthesis of Nanosilicon has been carried out from Natural sand with magnesiothermic method. Silica of natural sand was extracted by NaOH 10 N and HCl 6 N. Ultrasonication of silica with KCl has been done with a ratio of SiO2:KCl (1: 7.5 and 1: 12.5). Continuosly, silica converted to nanosilicon by using magnesiaothermic method with a ratio of SiO2: Mg 1: 2 heated up to 800ºC for 6 h. Nanosilicon was purified with deionized water and ethanol, HCl 5 N and HF 10%. The results of XRD analysis of nanosilicon of ratio of SiO2:KCl (1: 7.5 and 1: 12.5) each 88.8% and 73.0% by using Match aplication. The distribution of particle sizes were determined by using Scherrer’s equations 28.56 nm - 170.57 nm and 12.70 nm - 93.32 nm.
Eu3+ ions doped SrO-CaO-Li2O-B2O3glasses foroptical display material application
Authors: Venugopal A.R. , Kaewkhao J. , Abhiram J , Rajashekara K M , Rajaramakrishna R. , Pramod N. G. , Rao Chethan 
Published: May 2020

Abstract
The glass systems with composition 20SrO-5CaO-40Li2O-(35-x) B2O3-x Eu2O3 (x = 0.3, 0.5 and 1 mol%) glasses were prepared by melt quenching technique to study absorption and luminescence properties and understand their lasing properties. Thepresent work reports the studies on Physical, Optical and luminescence properties of the prepared glass systems. The photoluminescence (PL) intensity of the glass increases with increase in Eu2O3 content up to 1mol%. The increase in the density and decrease in molar volume reveals the close packing of glass network. For Eu3+ emission the most intense red emission has been observed at the wavelength of 614nm for the transitions5D0 →7F2. The phonon energy was measured from phonon side band spectra which showed 1280cm−1, typical value for the borate glasses. Luminescence intensity ratio and lifetime analysis has been measured and discussed in the present work. The present glasses are very near to reddish orangeregion and thus can be key entrant for optical display device applications.
Classification of Seismic Signal by Evaluating Broadband Networks Station in Sumatera Fore-Arc
Authors: Sinambela Marzuki , Tarigan Kerista , Humaidi Syahrul , Situmorang Marhaposan 
Published: May 2020

Abstract
Classification of seismic signal waveform is an essential component to realize the characteristics of the signal. The processing of the waveform signal is broadly used for the analysis of the real-time seismic signal. The numerous wavelet filters are developed by spectral synthesis using machine learning python to realize the signal characteristics. Our research aims to generate the performance of seismic signal and processing the waveform from Broadband Network Station by using Wavelet-Based on Machine Learning. In this case, we use Continuous Wavelet Transform (CWT) on Morlet. CWT is also clearly to identify spectral amplitudes and frequency-energy from the component of signal seismic performed by Broadband Network in Indonesia. The characteristic of the digital broadband network in Indonesia is variance. Our project tries to classification and evaluate the Broadband Seismic Network which deployed in Sumatera Region, Indonesia by using Power Spectral Density Probability Density Function (PSDPDF).
The Effects Of Sodium Hydroxide Concentrations on Synthesis Of Carboxymethyl Cellulose From Bacterial Cellulosa
Authors: Nurfajriani  , Pulungan A. N , Yusuf M , Tampubolon M. D , Bukit N. 
Published: May 2020

Abstract
This investigation aimed to create Carboxymethyl Cellulose (CMC) from the nata de coco cellulose. The nata de coco was produced by fermentation method of coconut water used acetobacter xylinum. Bacterial cellulose (BC) was isolated by furification nata de coco with 1% NaOH and 1% acetic acid solutions respectively. In the process of making CMC, dried BC was immersed in isopropanol medium, then alkalised with 10%, 15% and 20% NaOH solutions respectively for 1 hour at a temperature of 55 oC. Then BC reacted with 18 grams of chloroacetic acid. FTIR analysis results show that CMC was successfully synthesized from BC. The increase in NaOH concentrations in the CMC preparation caused an increase in the degree of substitution (DS). DS is one of the main parameters of the success of the CMC synthesis process from the initial raw material for cellulose. At a concentration of 20% NaOH, the resulting CMC synthesized with DS 0.743 was better than 10% NaOH with DS 0.371.
Development of Economic Learning E-Modules Based on Inquiry to Improve Economic Learning Outcomes at First Public Senior High School in Kutalimbaru T.A 2019/2020
Authors: Maya  , Situmorang Julaga , Mursid R. 
Published: May 2020

Abstract
This study aims to: (1) Produce inquiry-based economic learning e-Modules that are feasible to be developed to improve economic learning outcomes, and (2) to determine the effectiveness of inquiry-based economic learning e-Modules that are developed can improve economic learning outcomes. This type of research is development research that uses the R&D model of Borg and Gall combined with Dick and Carey’s instructional design model. The research method consists of two stages: the first stage is developing e-Module learning media and conducting a feasibility test, then the second stage is testing the effectiveness of the product.
The Influence of Learning models and Cognitive Styles on Geography Learning Outcomes in SMA N 2 Percut Sei Tuan
Authors: Bay Sinaga Zuilen V , Abdul Hamid K , Sugiharto  
Published: May 2020

Abstract
This study aims to: (1) Know the learning outcomes of students who are learning gography learning with problem based learning models and STAD learning models (2) to find out the geography learning outcomes of students who have independent cognitive styles, and dependent cognitive styles (3) know the interactions between learning models with cognitive styles in influencing student learning outcomes in geography. This research is a quasi-experimental research. Student learning outcomes taught by the problem based learning model are higher than students who are taught with the STAD learning model
Development of E - Learning Based “SMILE” Learning Model to Improve Economic Learning Outcomes of Class X Students of Senior High School 1 Pahae Jae 2019/2020
Authors: Butar-Butar Dwi Fany , Napitupulu Efendi , Ampera Dina 
Published: May 2020

Abstract
This study aims to: (1) Produce learning models that are feasible to use, easy to learn and can be used for learning (2) to determine the effectiveness of learning models based on E-learning. This research is a type of development that uses the product development model Borg and Gall and combined with the model’s learning design Dick and Carey. The method used in this study is a quasi-experimental method. The results of the hypothesis test study prove that there are significant differences between economic learning outcomes that are learned using the E-learning “SMILE” learning model with economic learning outcomes that are learned using inquiry learning models.
Fractal mechanism of basin of attraction in passive dynamic walking
Authors: Okamoto Kota , Aoi Shinya , Obayashi Ippei , Kokubu Hiroshi , Senda Kei , Tsuchiya Kazuo 
Published: May 2020

Abstract
Passive dynamic walking is a model that walks down a shallow slope without any control or input. This model has been widely used to investigate how humans walk with low energy consumption and provides design principles for energy-efficient biped robots. However, the basin of attraction is very small and thin and has a fractal-like complicated shape, which makes producing stable walking difficult. In our previous study, we used the simplest walking model and investigated the fractal-like basin of attraction based on dynamical systems theory by focusing on the hybrid dynamics of the model composed of the continuous dynamics with saddle hyperbolicity and the discontinuous dynamics caused by the impact upon foot contact. We clarified that the fractal-like basin of attraction is generated through iterative stretching and bending deformations of the domain of the Poincaré map by sequential inverse images. However, whether the fractal-like basin of attraction is actually fractal, i.e., whether infinitely many self-similar patterns are embedded in the basin of attraction, is dependent on the slope angle, and the mechanism remains unclear. In the present study, we improved our previous analysis in order to clarify this mechanism. In particular, we newly focused on the range of the Poincaré map and specified the regions that are stretched and bent by the sequential inverse images of the Poincaré map. Through the analysis of the specified regions, we clarified the conditions and mechanism required for the basin of attraction to be fractal.
Attribution of historical near-surface permafrost degradation to anthropogenic greenhouse gas warming
Authors: Guo Donglin , Sun Jianqi , Li Huixin , Zhang Tingjun , Romanovsky Vladimir E 
Published: May 2020

Abstract
Given the current confirmed permafrost degradation and its considerable impacts on ecosystems, water resources, infrastructure and climate, there is great interest in understanding the causes of permafrost degradation. Using the surface frost index (SFI) model and multimodel data from the fifth phase of the Coupled Model Intercomparison Project (CMIP5), this study, for the first time, investigates external anthropogenic and natural forcing impacts on historical (1921–2005) near-surface permafrost change in the Northern Hemisphere. The results show that anthropogenic greenhouse gas (GHG) forcing produces a significant decrease in the area of near-surface permafrost distribution at a rate of 0.46 × 106 km2 decade−1, similar to observations and the historical simulation (ALL). Anthropogenic aerosol (AA) forcing yields an increase in near-surface permafrost distribution area at a rate of 0.25 × 106 km2 decade−1. Under natural (NAT) forcing, there is a weak trend and distinct decadal variability in near-surface permafrost area. The effects of ALL and GHG forcings are detectable in the observed change in historical near-surface permafrost area, but the effects of NAT and AA forcings are not detected using the optimal fingerprint methods. This indicates that the observed near-surface permafrost degradation can be largely attributed to GHG-induced warming, which has decreased the near-surface permafrost area in the Northern Hemisphere by approximately 0. 21 × 106 km2 decade−1 on average over the study period, according to the attribution analysis.
An operator derivation of the Feynman–Vernon theory, with applications to the generating function of bath energy changes and to an-harmonic baths
Authors: Aurell Erik , Kawai Ryochi , Goyal Ketan 
Published: May 2020

Abstract
We present a derivation of the Feynman–Vernon approach to open quantum systems in the language of super-operators. We show that this gives a new and more direct derivation of the generating function of energy changes in a bath, or baths. As found previously, this generating function is given by a Feynman–Vernon-like influence functional, with only time shifts in the kernels coupling the forward and backward paths. We further show that the new approach extends to an-harmonic and possible non-equilibrium baths, provided that the interactions are bi-linear, and that the baths do not interact between themselves. Such baths are characterized by non-trivial cumulants. Every non-zero cumulant of certain environment correlation functions is thus a kernel in a higher-order term in the Feynman–Vernon action.
Photomicrograph-Based Neuropathology Consultation in Tanzania
Authors: Zerd Francis , Moore Brian E , Malango Atuganile E , Hosokawa Patrick W , Lillehei Kevin O , Mchome Laurence Lemery , Ormond D Ryan 
Published: May 2020

AbstractObjectivesSince neuropathologic diagnosis in the developing world is hampered by limitations in technical infrastructure, trained laboratory personnel, and subspecialty-trained pathologists, the use of telepathology for diagnostic support, second-opinion consultations, and ongoing training holds promise as a means of addressing these challenges. This study aims to assess the utility of static teleneuropathology in improving neuropathologic diagnoses in low- and middle-income countries.MethodsConsecutive neurosurgical biopsy and resection specimens obtained at Muhimbili National Hospital in Tanzania between July 1, 2018, and June 30, 2019, were selected for retrospective, blinded static-image neuropathologic review followed by on-site review by an expert neuropathologist.ResultsA total of 75 neuropathologic cases were reviewed. The agreement of static images and on-site glass diagnosis was 71% with strict criteria and 88% with less stringent criteria. This represents an overall improvement in diagnostic accuracy from 36% by general pathologists to 71% by a neuropathologist using static telepathology (or from 76% to 88% with less stringent criteria).ConclusionsTelepathology offers a promising means of providing diagnostic support, second-opinion consultations, and ongoing training to pathologists practicing in resource-limited countries. Moreover, static digital teleneuropathology is an uncomplicated, cost-effective, and reliable way to achieve these goals.
Minimalism’s Attention Deficit: Distraction, Description, and Mary Robison’s Why Did I Ever
Authors: Jones Sophie A 
Published: May 2020

AbstractWhat does it mean to diagnose a literary work with attention deficit disorder (ADD)? This article traces how US literary minimalism came, in the late twentieth century, to be understood as a literary counterpart to the new diagnostic category of ADD. Pursuing some links between literary criticism and the third volume of the Diagnostic and Statistical Manual of Mental Disorders, the article shows how minimalism was seen to resemble the ADD patient because both were defined in terms of a descriptive surface that yielded no depths for expert excavation. Engaging with recent debates on the relative function and value of description and interpretation in literary studies, the article asks whether the notion of an ADD literary aesthetics, grounded in critical disability studies, might provide a route out of the dichotomy of suspicious analysis and reparative description. To pursue this question, the article performs a close reading of Mary Robison’s Why Did I Ever (2001), a novel narrated by Money Breton, a woman with an ADD diagnosis. Drawing on the critical disability studies concept of cripistemology, the article shows how Robison’s novel both dismantles the trope of minimalism’s attention deficit and demands a reformulation of the relationship between writing and diagnosis.
Retrieval Practice in Memory- and Language-Impaired Populations: A Systematic Review
Authors: de Lima Marcos Felipe Rodrigues , Cavendish Beatriz Araújo , de Deus Juliana Silva , Buratto Luciano Grüdtner 
Published: May 2020

Abstract

Objective
Neurological conditions, such as multiple sclerosis and stroke, may impair memory and language. A technique called retrieval practice (RP) may improve memory and language outcomes in such clinical populations. The RP effect refers to the finding that retrieving information from memory leads to better long-term retention than restudying the same information. Although the benefits of RP have been repeatedly observed in healthy populations, less is known about its potential applications in cognitive rehabilitation in clinical populations. Here we review the RP literature in populations with acquired memory and language impairments.

Method
Systematic searches for studies published before January 2020 were conducted on Elsevier, PsycARTICLES, PsycINFO, Pubmed, Web of Science, and Wiley Online Library, with the terms “retrieval practice”/“testing effect” and “cognitive rehabilitation”. In addition, backward and forward snowballing were used to allow the identification of important publications missed by the initial search. Studies were included if they were peer-reviewed, empirical work in which memory or language outcome measures were compared between an RP condition and a re-exposure-control condition in patients with acquired memory or language impairments.

Results
Sixteen articles fulfilled the inclusion criteria. Studies from memory-impaired samples were relatively homogeneous with respect to experimental protocols and materials and favored RP over control conditions. The results were mostly positive despite short retention intervals and predominantly single-session designs. Similarly, studies from language-impaired samples focused on naming impairments in patients with aphasia and also favored RP over name repetition.

Conclusion
The results indicate that RP is a viable technique for cognitive rehabilitation.