bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modelling of Electric Submersible Pump Work on Gas-Liquid Mixture by Machine Learning
Authors: Goridko Kirill Alexandrovich , Shabonas Arturas Rimo , Khabibullin Rinat Alfredovich , Verbitsky Vladimir Sergeevich , Gladkov Andrey Valeryevich 
Published: October 2021

Abstract
Oil wells in Western Siberia usually placed on artificial drilling pads, forming well clusters up to 30 wells. The flow rate of each well in the cluster measured by an automatic measuring unit one by one. Often flow rate measurement requires several hours and flow rate of a single well can be measured once a week or less. This led to situation then events affecting well rate can be invisible between measurements. Identifying such events can be extremely useful in many cases, for example for wells with unstable behavior or transient regimes. The same challenges are also faced at distant green fields during their development, there the flow rates can be measured once a month with a mobile unit. The objective of this paper is to develop a virtual flowmeter model based on indirect high-frequency data of well operation and ESP.
In Gubkin University, at the Petroleum Reservoir and Production Engineering Department, bench tests of ESP5-50 (118 radial stages) on gas-liquid mixture in a wide range of volumetric gas content (βin = 0-60%), intake pressure (Pin = 0.6-2.1 MPa) and pump shaft speed (n= 2400-3600 rpm) were performed. Three vibration sensors were installed on the unit: on the ESP, at the ESP discharge, on the pipeline, which simulates the wellhead production tree. During the bench tests were recorded series of pressures at the intake, discharge and along the pump length, series of current and power consumption, as well as vibrations with frequency several times per second.
Based on the bench test results, we investigated the possibility of indirect determination of well operation parameters during artificial lift modelling by machine learning. As a result, the approaches to modelling taking into account various sets of parameters (features) have been studied: based on hydraulic parameters – ESP intake and outlet pressure;based on hydraulic and electric parameters – current and power consumption;based on hydraulic, electric and vibrating parameters.
The analysis of data series allowed to define the boundaries of stable ESP operation, namely the transition to surging and pump starvation.
The novelty of the work is: –machine learning modeling of the gas-liquid mixture pumping process by electric submersible pump;–solving both direct and inverse issues: as virtual liquid flowmeter as, virtual gas content flowmeter at the pump intake.
The Application of Dual-phase Enhanced CT Scan in Distinguishing Adrenal Ganglioneuromas From Adrenal Lipid-poor Adenomas
Authors: Yu Huajun , Wang Jian , Niu Zhongfeng , Shao Meihua 
Published: October 2021

Abstract
Background:The utility of dual-phase enhanced CT scan in distinguishing ganglioneuromas from lipid-poor adenomas has not been reported. We aimed to prospectively compare CT findings helpful in distinguishing adrenal ganglioneuromas from adrenal lipid-poor adenomas. Methods: We estimated the CT findings of 258 adrenal masses (42 ganglioneuromas, 216 lipid-poor adenomas) in 258 patients from July 2008 to July 2020 with ganglioneuromas and July 2016 to July 2020 with lipid-poor adenomas. The CT features between ganglioneuromas and lipid-poor adenomas were compared. Results:Significant differences were detected in CT value of unenhanced (CTU), CT value of arterial phase (CTA), CT value of venous phase (CTV), degree of enhancement in arterial phase (DEAP), degree of enhancement in portal venous phase (DEPP), age, tumor size [long diameter (LD), short diameter (SD), mean diameter (MD)], shape, calcification between the ganglioneuroma and lipid-poor adenoma groups (P < 0.05).The results of receiver operating characteristics (ROC) analyses showed that areas under ROC curves (AUC) of CTU, CTA and CTV were 0.713, 0.878, and 0.914, respectively. When the cut-off values were set at 22.5 HU, 51.5 HU, and 53.5 HU for CTU, CTA, and CTV, respectively the three parameters had a sensitivity of 46.8%, 67.6%, and 88.0% and a specificity of 100%, 100%, and 88.1% in distinguishing between ganglioneuromas and lipid-poor adenomas.Conclusion: Dual-phase enhanced abdominal CT can exhibit some of the primary imaging characteristics of ganglioneuromas and lipid-poor adenomas used to distinguish between these two entities.
A New Method of Manufacturing Thin-Walled Tube Made of AZ61 Magnesium Alloy Including Direct Extrusion And Corrugated Equal Channel Angular Extrusion
Authors: Hu H-J , Zhang Ou , Hu Gang , Zhao Hui , OU Zhongwen 
Published: October 2021

Abstract
Due to demand of strong toughness of thin walled tube, and good secondary forming properties and high-precision dimension, New plastic forming method should be researched to achieve a complete filling, uniform deformation and microstructure evolution during forming process.To obtain the deformation mechanisms of a new composite extrusion for thin walled tube fabricated by tube corrugated equal channel angular extrusion has been researched which is shorten as “TC-ECAE” in this paper. Finite element DEFORMTM-3D software to investigate the plastic deformation behavior of magnesium billet during TC-ECAE process has been employed. Computed parameters including workpiece material characteristics and process conditions have been taken into consideration. The pridictions of strains distributions and damage distributions and effective stress distributions and flow velocities distributions and microstructures evolutions have been explored. The results proved that the TC-ECAE process is a forming method for magnesium alloy tube which is suitable for large scale industrial application. The TC-ECAE process would cause serve plastic deformation and improve the dynamic recrystallization of magnesium alloy during TC-ECAE process.
PEMANFAATAN TEKS MULTIMODAL SEBAGAI INOVASI MATERI PEMBELAJARAN BAHASA INDONESIA PADA MASA PANDEMI COVID-19
Authors: Putut Setiyadi Dwi Bambang 
Published: October 2021

Abstract
Based on the 2013 Curriculum, Indonesian language learning in SMP is text-based. During this pandemic, learning various texts should take advantage of existing technology with teaching materials in the form of multimodal texts. This study aims to describe the use of multimodal text as an innovation in Indonesian language learning materials in junior high schools and the implementation of learning. This study used descriptive qualitative method. Data collection techniques using observation techniques, interviews, documents, and audiovisual materials. Observation and document techniques were used to observe and document the textbooks used in Indonesian language learning for grade VIII SMP, both from offline and online data. Audiovisual techniques to collect data in the form of multimodal text sourced from the internet and social media. The data validity used data triangulation techniques, researchers, methods, and theories. The data analysis technique was done by reducing the data, presenting the data, and concluding. The results showed that multimodal text learning as an innovation in Indonesian language learning materials in class VIII SMP was beneficial for students to improve their literacy competencies in the era of the industrial revolution 4.0. In addition, it can also introduce students to types of text that are broader, more eye-catching, and less saturating. Students and teachers can explore these materials from the internet or social media in accordance with the teaching material. The teacher must prepare a good and appropriate lesson plan and scenario.
Keywords: multimodal text; Indonesian language teaching materials; learning media
PENGEMBANGAN MEDIA “KLIK AJA” DALAM PEMBELAJARAN DARING MENYAMPAIKAN TEKS BERITA BAGI SISWA KELAS VIII
Authors: Fahriyanti Alvira Jasmin Eka , Prasetya Citra Ika , Wantoro Rizky 
Published: October 2021

The Covid-19 pandemic is a new challenge in the world of education, especially for a teacher, because learning must be done online. Therefore, teachers must master digital skills and creative thinking patterns, especially in conveying news texts. Facing this, this study discusses the development of online-based interactive learning media. The media development was designed by utilizing the Articulate Storyline 3 software in collaboration with learning videos and Google forms which were then combined on the Linktree website. The objectives of this study include describing the development of media and the presentation/display of the "Click Aja" media in online learning to deliver news texts for class VIII students and describe the results of the effectiveness test of using "Click Aja" media in online learning to deliver news texts for class VIII students. This study uses the type of research and development method ADDIE model. Through this research method, the discussion in this study leads to the resulting product, which is a "Click Aja" learning media. The product was tested by experts and obtained an average value of 3.4 which states that the media is suitable for use. In addition, the product was also tested on students and obtained an average score of 3.51 which stated that the media was suitable for use. Although the "Click Aja" media is feasible to use, there are improvements submitted by experts, including errors in writing, the delivery of material in the learning video is less communicative and incomplete material regarding news texts.
ANALISIS NILAI SOSIAL PADA NOVEL BILA MALAM BERTAMBAH MALAM KARYA PUTU WIJAYA DENGAN PENDEKATAN MIMETIK
Authors: Muyassaroh Muyassaroh , W. N. Yunita Pratama , E. F. Alvira Jasmin , Prasetya Citra Ika 
Published: October 2021

Every literary work must have the social values ​​of life contained in it, whether conveyed implicitly or explicitly. Like the novel Bila Malam Bertambah Malam by Putu Wijaya, it contains many social values ​​and so on. With these problems, this research article is written to discuss "Analysis of Social Values ​​in the novel Bila Malam Bertambah Malam by Putu Wijaya using the mimetic approach”. This research was conducted using qualitative descriptive research methods. Data collection techniques carried out, in the form of documentation, as well as research instruments were the researchers themselves using a check list of the classification of research materials and notes of observations. The data analysis technique in this study is a descriptive interpretive technique, where the researcher tries to describe the opinions and views that are on an object of research. This article aims to find out the social values ​​contained in the novel Bila Malam Bertambah Malam by Putu Wijaya. The results of this study indicate that social problems cannot be separated from the relationships that accompany them. These relationships include human problems with humans, human problems with oneself and human problems with culture.
Evaluation of the vulnerability in water distribution systems through targeted attacks
Authors: Albarakati Aiman , Tassaddiq Asifa , Kale Yogesh 
Published: October 2021

Abstract
This paper presents the results of a vulnerability analysis in different water distribution system (WDS) benchmarks, performed under a framework based on a graph model that integrates topological features and hydraulic characteristics, allowing the comparison between different attack strategies and centrality measures in terms of their ability to predict the shortage of water supply. This vulnerability framework has been previously applied to electric power systems and it employs a vulnerability prediction measure to quantify the amount of damage caused in terms of the physical damage measure. Different attack strategies and centrality measures were applied to four WDS benchmarks: the New York Tunnel, the Hanoi, the Modena, and the Balerma networks. It was determined that removing the most central element and recalculating the centrality for each stage are the most damaging attack strategies. Degree, eigenvector, and Katz centrality measures presented the best performance to predict the elements that are more relevant to the network and can have a larger impact on the water supply. It was demonstrated that the vulnerability framework can be applied to the WDS in the same way it was previously applied to electric power systems. Future work will be oriented to the design of the WDS using optimization techniques to minimize the vulnerability of the network under faults that can be generated by droughts and other extreme weather conditions.
Impact of climate change on hydro-climatological parameters in North Cyprus: application of artificial intelligence-based statistical downscaling models
Authors: Elkiran Gozen , Nourani Vahid , Elvis Ogodor , Abdullahi Jazuli 
Published: October 2021

Abstract
There are many environmental challenges in water-limited places in the 21st century, particularly in dry and semi-arid regions, due to the threat of climate change caused by the greenhouse effect. This study intends to explore and assess the influence of climate change on hydro-climatological parameters using statistical downscaling and future forecasts of mean monthly precipitation and temperature throughout Famagusta (Mağusa), Nicosia (Lefkoşa), and Kyrenia (Girne) stations, North Cyprus. To achieve the study's goal, 13 predictors of BNU-ESM GCMs from CMIP5 were used at a grid point in the Karfas region. To find the primary predictors, GCM data were screened using mutual information (MI) and correlation coefficient (CC) feature extraction methods prior to downscaling modeling. A neural network (ANN), an adaptive neuro fuzzy inference system (ANFIS), and multiple linear regression (MLR) models were employed as the downscaling models. We used the best downscaling model as a benchmark for future precipitation and temperature estimates for the period 2018–2040 under the RCP4.5 scenario. In the future, Famagusta and Nicosia would have up to 22% less rain, and Famagusta and Kyrenia will have 2.9% greater heat. The findings of this research could be useful in decision-making, as well as water resource management and climate change.
Seasonal and gender impacts on fecal exposure trends in an urban slum
Authors: Chua Min-Li , Ahsan Md. Nazmul , Sakai Akira , Fujii Shigeo , Goto Shotaro , Kodera Michiya , Harada Hidenori 
Published: October 2021

AbstractSeasonal and gender impacts have not been well considered in fecal exposure assessment, especially in low- and middle-income countries. This study examined the seasonal and gender impacts on fecal exposure trends in children through daily living activities in an urban slum in Bangladesh. We determined Escherichia coli concentrations in seven types of environmental samples (n = 232) and the activity data of children via diary recording, questionnaires, and interview surveys. Daily and monthly exposures were stochastically estimated for drinking, eating, pond bathing, well bathing, and hand-to-mouth contact. Of the five pathways, pond bathing and drinking contributed a large part of the daily and monthly exposure. Significant seasonal differences were observed in daily exposures for bathing, which were higher in the rainy season (2.59 × 102 CFU/day for boys and 6.19 × 10−1 CFU/day for girls) than in the dry season (1.69 × 102; 4.30 × 10−2), because of longer pond bathing time and more contaminated bathing water in the rainy season. In contrast, eating had significantly higher exposure in the dry season (3.71 × 10; 3.22 × 10) than the rainy season (1.50 × 10; 1.24 × 10) due to the higher dish contamination. Significantly higher daily exposure was observed in the bathing for boys than girls, as boys spent longer time for bathing at a heavily contaminated pond.
Adsorption of cupric, cadmium and cobalt ions from the aqueous stream using the composite of iron(II,III) oxide and zeolitic imidazole framework-8
Authors: Kuwer Pushpmala , Yadav Anshul , Labhasetwar Pawan Kumar 
Published: October 2021

Abstract
In recent research, the composite of Fe3O4 and metal-organic frameworks have shown great potential in removing potentially toxic metals from water. We conducted the adsorption studies of potentially toxic metal ions (Cu2+, Co2+ and Cd2+) using the composite of Fe3O4 and zeolitic imidazole framework-8 (Fe3O4@ZIF-8) for the first time. The solvothermal technique was used to synthesize the Fe3O4. The magnetic ZIF-8 offers high thermal stability, greater adsorption surface, good removability, and high chemical and thermal stability. Characterization techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR) were used to characterize the synthesized samples. The SEM and XRD results revealed the high purity and structural integrity of ZIF-8 crystallites. To remove potentially toxic metals (Cu2+, Co2+ and Cd2+), the influence of adsorbent dosage, contact time, pH, and adsorbate concentration on the adsorption performance of Fe3O4@ZIF-8 was investigated. The Langmuir isotherm accurately represented the adsorption processes, with absorption magnitudes of Fe3O4@ZIF-8 determined to be 46.82 mg g−1, 71.29 mg g−1 and 54.49 mg g−1 for Cu2+, Co2+ and Cd2+, respectively. According to the adsorption mechanism analysis, the primary Cu2+, Co2+ and Cd2+ removal methods of Fe3O4@ZIF-8 were ion exchange and coordination bonds. The uptake capacity of Cu2+, Co2+ and Cd2+ solution by Fe3O4@ZIF-8 were not significantly affected by the presence of counter ions. The material exhibited superior regenerative properties for Cu2+, Co2+ and Cd2+ ions from water for up to three cycles. This study concluded that the Fe3O4@ZIF-8 could be a viable candidate for eliminating potentially toxic metals (Cu2+, Co2+ and Cd2+).
Re-utilization of Chinese medicinal herbal residue: waste wormwood rod-derived porous carbon as a low-cost adsorbent for methyl orange removal
Authors: Wang Shuhui , Huang Yu , Wu Yiting , Zhang Xinyu , Wan Liu , Liu Xiang , Zhang Wanju 
Published: October 2021

Abstract
A cost-effective approach was applied to prepare porous carbon samples by the simple carbonization of wormwood rod followed by salt activator (NaCl) activation. The effect of preparation parameters on the characteristics of the wormwood rod-based porous carbons (WWRs) were studied. The properties of these samples were investigated by SEM, BET surface area, X-ray diffraction, FT-IR spectra and X-ray photoelectron spectrometer. The prepared WWRs were applied as new adsorbent materials to remove methyl orange (MO). The experimental results indicated that WWR-800 activated at 800 °C possesses the best adsorption performance. Several factors that affected the adsorption property of the system such as the solution pH, dosing of adsorbent, initial dye concentration and ionic strength were examined. In addition, the thermodynamic parameters and kinetic parameters of MO with WWR-800 were studied. The results indicated that the adsorption of MO on WWR-800 was an endothermic process and non-spontaneous under standard conditions. The maximum equilibrium adsorption capacity of MO on WWR-800 was 454.55 mg/g. After five adsorption/desorption cycles, the adsorption capacity of MO on WWR-800 remained at 94%, which indicated that wormwood rod-based porous carbon possessed good reusability.
Fungal Infection in Cystic Fibrosis
Authors: Sarvestani Amirmehdi , Almasian Mohammad , Nafari Amirhossein 
Published: October 2021

Background:
The prevalence of fungal infections has been increasing in recent years.
Cystic fibrosis (CF) is a genetic disorder that affects organs such as the intestines, liver, pancreas,
and especially the lungs.

Introduction:
Fungal pathogens are becoming a challenge in CF. Advanced medical science is associated
with longer life expectancy in some patient groups.

Method:
A review was conducted on studies found on online databases, including Google Scholar,
PubMed, and Scopus. Internet-based searches were performed on these databases for cystic fibrosis,
respiratory infections, and fungal infection profiling to identify all relevant studies published
between 2010 and 2020.

Result:
Fungal pathogens most frequently isolated from the respiratory tract include the Aspergillus
genus, the Candida genus, Scedosporium apiospermum, and the Rasamsonia genus. In cystic fibrosis,
these organisms usually colonize the respiratory and intestinal tracts and cause hypersensitivity
responses and invasive diseases.

Conclusion:
Fungus-patient interactions are complicated and depend on various factors. Moreover,
the emergence of drug-resistant species is a serious health issue, and the development of new treatments
is crucial.
Faktor Risiko Anemia pada Anak Sekolah Dasar di Temanggung
Authors: Putri Netta Meridianti , Briawan Dodik , Baliwati Yayuk Farida 
Published: October 2021

Anemia pada anak sekolah masih menjadi masalah yang harus segera ditangani di Indonesia. Menurut laporan Riset Kesehatan Dasar (Riskesdas) 2013, prevalensi anemia untuk anak usia sekolah di Indonesia adalah 26.4%. Penelitian ini bertujuan untuk menentukan faktor-faktor risiko (karakteristik subjek, karakteristik keluarga, densitas protein dan asupan zat besi, kecukupan protein dan zat besi, frekuensi konsumsi pangan sumber heme, pola konsumsi enhancer dan inhibitor zat besi serta frekuensi sarapan) terhadap kejadian anemia. Desain penelitian yang digunakan adalah cross sectional yang dilakukan pada bulan Januari - Juni 2018. Penelitian ini dilakukan pada anak sekolah dasar kelas 4 - 6 di Temanggung. Sampel sebanyak 318 siswa dipilih menggunakan metode simple random sampling. Analisis data dilakukan secara univariat, bivariat dengan uji chi square dan multivariat dengan regresi logistik. Hasil analisis multivariat menunjukkan bahwa frekuensi sarapan, frekuensi konsumsi telur, frekuensi konsumsi hati ayam, dan konsumsi obat cacing merupakan faktor risiko terjadinya anemia pada anak sekolah dasar di Temanggung.Â Â
Применение методов радиоспектроскопии для исследования термоэлектриков со структурой халькопирита
Authors: Матухин В.Л. , Гавриленко А.Н. , Шмидт Е.В. , Орлинский С.Б. , Севастьянов И.Г. , Гарькавый С.О. , Navratil J. , Novak P. 
Published: October 2021

Рассмотрены легированные соединения халькопирита. Приведены результаты изучения спектральных параметров методом ядерного магнитного резонанса 63,65Cu в локальном поле, а также методом электронного парамагнитного резонанса в интервале температур 15-300 K. Наблюдаемое уширение резонансных линий спектров ядерного магнитного резонанса и обнаружение парамагнитного сигнала в образце при температуре 15 K свидетельствуют о появлении антиструктурных дефектов. Быстрое изменение формы линии спектра электронного парамагнитного резонанса в интервале температур 100-130 K связывается со структурно-фазовым переходом. Ключевые слова: термоэлектрики,	соединения халькопирита, антиструктурные дефекты.