bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analisis Indeks Kekeringan Hidrologi DAS Krueng Aceh (Studi Kasus Sub DAS Krueng Jreue dan Sub DAS Krueng Khee)
Authors: Aldin Attabari , Basri Hairul , Syahrul Syahrul 
Published: May 2023

Abstrak. Luas Sub DAS Krueng Jreue 23.218,06 Ha dan Sub DAS Krueng Khee 9.599,66 Ha. Berdasarkan hasil kajian bahwa luas vegetasi tutupan lahan semakin berkurang setiap tahunnya dimana ditandai dengan tingginya nilai fluktuasi debit sehingga mengakibatkan banjir pada musim hujan dan kekeringan pada musim kemarau. Tujuan penelitian adalah untuk mengetahui nilai ambang batas kekeringan hidrologi di Sub DAS Krueng Jreue dan Sub DAS Krueng Khee dan indeks kekeringan hidrologi di Sub DAS Krueng Jreue dan Sub DAS Krueng Khee. Penelitian ini menggunakan metode ranking Weibull dimana ditentukan nilai ambang batas Q50 dan Q80, dihitung defisit dan durasi dan kemudian ditentukan nilai indeks kekeringan hidrologi. Nilai ambang batas Sub DAS Krueng Jreue adalah 0,067 m3/s dan Sub DAS Krueng Khee 0,181 m3/s. Defisit Sub DAS Krueng Jreue tahun 2014 adalah tertinggi dengan angka 0,401 m3/s dengan durasi kering tujuh bulan dan Sub DAS Krueng Khee tahun 2012 adalah tertinggi dengan angka -0,715 m3/s dengan durasi kering enam bulan. Indeks kekeringan hidrologi di Sub DAS Krueng Jreue tahun 2015 adalah tertinggi dengan nilai 0,0629 m3/s dan indeks kekeringan hidrologi di sub DAS Krueng Khee tahun 2011 adalah tertinggi dengan nilai 0,3282 m3/s.An Analysis of The Krueng Aceh’s Hydrological Drought Index (A Case Study of The Sub Watershed Krueng Jreue and Krueng Khee)Abstract. The area of the Krueng Jreue Sub-watershed is 23,218.06 Ha and the Krueng Khee Sub-watershed is 9,599.66 Ha. Based on the results of the study that the area of land cover vegetation decreases every year which is indicated by the high value of discharge fluctuations, resulting in flooding in the rainy season and drought in the dry season. The purpose of this study was to determine the threshold value for hydrological drought in the Krueng Jreue Sub-watershed and Krueng Khee Sub-watersheds and the hydrological drought index in the Krueng Jreue Sub-watershed and Krueng Khee Sub-watersheds. This study uses the Weibull ranking method where the threshold values for Q50 and Q80 are determined, the deficit and duration are calculated and then the hydrological drought index value is determined. The threshold value for the Krueng Jreue Sub-watershed is 0.067 m3/s and the Krueng Khee Sub-watershed is 0.181 m3/s. The Krueng Jreue Sub-watershed deficit in 2014 was the highest at 0.401 m3/s with a dry duration of seven months and the Krueng Khee Sub-watershed in 2012 was the highest at -0.715 m3/s with a dry duration of six months. The hydrological drought index in the Krueng Jreue Sub-watershed in 2015 was the highest with a value of 0.0629 m3/s and the hydrological drought index in the Krueng Khee Sub-watershed in 2011 was the highest with a value of 0.3282 m3/s.
The study of shelf-life of soymilk treated by pasteurization methods by using organoleptic test
Authors: Hariono Budi , Kautsar Syamsiar , Brilliantina Aulia , Kurnianto Mokhamad Fatoni , Wijaya Rizza 
Published: May 2023

AbstractSoymilk is generally processed by a pasteurization process. Pasteurization itself is a method that is widely known in the processing industry as a method to kill microorganisms using high temperatures or commonly referred to as thermal methods that result in damage to physical and chemical components. Therefore, a non-thermal pasteurization process such as high pulsed electric field (HPEF) is needed to maintain product quality attributes. The purpose of this study is to determine the shelf life of soymilk treated by using organoleptic test. About 20 panellists evaluated the quality of soymilk based on color and flavour. Results showed that the HPEF treatment did not change the color and aroma of soybean juice products for 11 hours. It can extend the shelf life of soybean juice for 1 hour compared to the thermal pasteurization process.AbstrakSusu kedelai pada umumnya diolah dengan proses pasteurisasi. Pasteurisasi sendiri merupakan sebuah metode yang banyak dikenal dalam industri pengolahan sebagai metode untuk membunuh mikroorganisme menggunakan suhu tinggi atau biasa disebut dengan metode termal yang mengakibatkan kerusakan komponen fisik serta kimiawi. Oleh karena itu, dibutuhkan proses pasteurisasi non-termal seperti high pulsed electric field (HPEF) yang dapat menjaga atribut mutu produk. Adapun tujuan dari penelitian ini adalah mengkaji umur simpan susu kedelai yang diberi perlakuan metode pasteurisasi dengan uji organoleptik. Sebanyak 20 orang panelis memberikan penilaian terhadap sampel susu secara deskriptif berdasarkan kriteria warna dan aroma. Hasil penelitian menunjukkan bahwa perlakuan HPEF tidak merubah warna dan aroma dari susu kedelai sampai 11 jam. Hal ini menunjukkan bahwa metode HPEF dapat memperpanjang umur simpan susu kedelai selama 1 jam dibandingan metode pasteurisasi termal.
Effect of Different Protective Bases on pH Changes and Hydrogen Peroxide Microleakage During Intracoronal Bleaching
Authors: Feiz Atiyeh , Faghihian Hessamoddin , Mahdaviani Marjan Sadat 
Published: May 2023

Objectives: This study aimed to evaluate the pH changes and penetration of hydrogen peroxide into radicular dentin when different protective bases were used with and without a bonding agent.
Materials and Methods: In this in-vitro experimental study, 70 single-rooted bovine teeth were instrumented and obturated with gutta-percha. The gutta-percha was removed 3mm below the cementoenamel junction (CEJ) and the teeth were divided into seven groups (n=10). In each group, 2mm base (1mm apical to the CEJ) was applied as follows: TheraCal LC, TheraCal LC plus SE Bond, Lime-Lite, Lime-Lite plus SE Bond, Ionoseal, Ionoseal plus SE Bond, and resin-modified glass ionomer (RMGI). The teeth were placed in vials containing distilled water, and pH values and molar concentration of the medium surrounding the teeth were recorded immediately after internal bleaching with 35% hydrogen peroxide. The pH values were also recorded at 1, 7, and 14 days following renewal of the medium. Data were analyzed with t-test, one-way ANOVA, and Kruskal-Wallis test.
Results: After bleaching, the medium pH became acidic in all groups. There were no significant differences among groups in the mean pH of the medium after bleaching (P=0.189). Moreover, there were no significant differences among the study groups with respect to hydrogen peroxide concentration (P=0.895).
Conclusion: Intra-orifice barriers such as light-cure resin-modified calcium hydroxide, light-cure resin-reinforced glass ionomer, and light-cure calcium silicate can be as effective as RMGI in providing coronal seal during intracoronal bleaching.
Edukasi Kesehatan Wanita Usia Subur Dalam Mempersiapkan Kehamilan Di Desa Tegorejo Kendal dan Kelurahan Cigugur Cimahi
Authors: RUM IRA ADIYATI 
Published: May 2023

<span lang="EN-US">Kehamilan yang sehat membutuhkan persiapan fisik, mental dan pengetahuan, oleh karena itu perencanaan kehamilan harus dilakukan sebelum masa kehamilan oleh wanita usia subur (WUS). Puskesmas Pegandon memiliki jumlah WUS (wanita usia subur) terbesar di desa Tegorejo. Tingkat kehamilan terbesar juga terjadi di desa Tegorejo. Selain itu jumlah ibu hamil dengan resiko tinggi di Puskesmas Pegandon dalam 1 tahun terakhir mencapai 119 kasus. Berdasarkan data tersebut perlu dilakukan upaya edukasi yang berkelanjutan untuk menurunkan prevalensi dan mencegah kegawatdaruratan pada kehamilan dan persalinan. Salah satu upaya yang dapat dilakukan adalah program edukasi pada pasangan WUS. Kegiatan dilakukan dengan metode talkshow dan webinar melalui metode daring dan luring dengan mitra utama di desa Tegorejo, Pegandon Kendal dan Kelurahan Cigugur Tengah Kota Cimahi</span>
Pelatihan Pengisian Mini Mental State Examination (MMSE) dan Eight-item Informant Interview to Differentiate Aging and Dementia (AD8) untuk Deteksi Dini Demensia Alzheimer bagi Tenaga Kesehatan di Fasilitas Kesehatan Tingkat Pertama
Authors: Ristinawati Ira , Mirawati Diah Kurnia , Subandi Subandi , Danuaji Rivan , Budianto Pepi , Prabaningtyas Hanindia Riani , Tedjo Raden Andi Ario , Putra Stefanus Erdana , Hafizhan Muhammad 
Published: May 2023

<p>Kegiatan ini bertujuan untuk untuk meningkatkan pengetahuan dan kesadaran para tenaga kesehatan di fasilitas kesehatan tingkat pertama (FKTP) tentang pentingnya cara pengisian kedua instrumen tersebut dalam rangka deteksi dini demensia Alzheimer. Kegiatan ini juga bertujuan mengarahkan para tenaga kesehatan di FKTP untuk melakukan skrining pada pasien yang memiliki faktor risiko mengalami demensia Alzheimer sehingga tatalaksana dini yang lebih baik dapat diterapkan pada penderita demensia Alzheimer yang tentunya dapat meningkatkan kualitas hidup pasien tersebut. Target yang dicapai adalah peningkatan pemahaman dan informasi terkait cara pengisian MMSE dan AD8 dan manfaat skrining demensia Alzheimer. Metode pelaksanaan kegiatan pemberdayaan dan pengabdian masyarakat pada mitra berupa pemetaan demografi tenaga kesehatan FKTP potensial yang dilanjutkan dengan koordinasi dan kolaborasi dengan bagian Diklit RSUD Dr. Moewardi Surakarta untuk promosi dan pelaksanaan pelatihan daring. Selanjutnya, peneliti melakukan pelatihan dengan cara menjelaskan cara pengisian MMSE dan AD8 serta manfaat skrining demensia Alzheimer, simulasi interaktif cara pengisian MMSE dan AD8 dengan probandus, diskusi dan tanya jawab, serta evaluasi. Hasil pengabdian ini menunjukkan bahwa para tenaga kesehatan memiliki pemahaman yang meningkat dibandingkan sebelum pelatihan tentang cara dan manfaat pengisian MMSE dan AD8 dalam skrining demensia Alzheimer, sehingga meningkatkan kesadaran para tenaga kesehatan di FKTP akan dampak buruk peningkatan kejadian demensia Alzheimer yang dapat timbul akibat keterlambatan diagnosis.</p><p> </p><p><strong>Kata kunci</strong>: demensia Alzheimer; pelatihan; tenaga kesehatan; MMSE; AD8</p>
Insights Into Bitumen Viscosity Reduction Using Ultrasound-Assisted EOR
Authors: Nguele Ronald , Saheed Alade Olalekan , Okawa Hirokazu , Sasaki Kyuro 
Published: May 2023

Abstract
The present work clarifies the mechanisms associated with bitumen viscosity reduction during ultrasound sonication. A Canadian (CDN) and Nigerian (NGR) bitumen, selected for this study, have a respective viscosity of 2,617 and 12,043 cP at room temperature. Two series of ultrasound sonication experiments were performed using an ultrasonic generator and the submersible traducer. A series of experiments at 28, 38 and 200 kHz under ambient (air)-environment revealed that sonicating the oil continuously for 3 h at 200 kHz reduced NGR viscosity from 12,043 to 2,079 cP and the asphaltene content from 3.21 to 1.14 wt.%. Under the same conditions, CDN viscosity reduced from 2,617 to 486 cP and its asphaltene content increased from 5.72 to 8.11 wt.%. A reverse trend was observed at 38 kHz. For an average of 70% viscosity reduction, asphaltene content increases to 7.94 wt.% for NGR and decreases to 1.03 wt.% for CDN. On the other hand, bitumen sonication at 38 kHz under nitrogen (N2), and carbon dioxide (CO2) environment showed that irradiating NGR for 3 h under an N2 environment resulted in the lowest oil viscosity of 3,274 cP. However, the asphaltene content increases to 16.3 wt.%. Changing the gas environment to CO2 and air could reduce the viscosity to 4,415 and 9,773 cP, respectively. The asphaltene content decreases to 15.1 and 2.37 wt.%, concurrently. No direct relation between asphaltene content and viscosity reduction was established. Nevertheless, the viscosity reduction is influenced either by the applied frequency or gas environment. The minimum energy required to initiate the flow increased with the applied frequency and was fairly altered by the change in the gas environment.
Kuparuk Field Reservoir Management After 40 Years
Authors: Jensen Trond B , Lewis Adam M , Little Laird D , Neely Thomas G , Scheihing Mark H , Stevenson Mark D , Van Nostrand Dominique , Versteeg Joe R 
Published: May 2023

Abstract
The giant Kuparuk Field (Figure 1), the second largest oil field on the Alaska North Slope and one of the largest oil fields in the United States, has been on production for 41 years. The field, a legacy asset in the ConocoPhillips portfolio, contains more than 7.5 Bstb OOIP with 2.5 Bstb in the C Sands and 5.0 Bstb in the A Sands. Production commenced in December 1981 and has cumulated to date more than 2.5 Bstb oil through water-flooding, immiscible water-alternating gas (IWAG) and miscible water-alternating-gas (MWAG) injection. Currently, the field produces about 60,000 stb/d oil, 515,000 bbl/d water and 105 MMscf/d gas, and injects 625,000 bbl/d water and 80 MMscf/d gas through 3 central processing facilities (CPF1, CPF2, and CPF3, located as shown in Figure 1), 45 drillsites, and about 700 active wells.
Although the Kuparuk Field is mature, recent studies highlight the potential to optimize the oil recovery. Static and dynamic data along with benchmark studies indicate that the underlying Kuparuk A Sands are of lower maturity than the overlying Kuparuk C Sands. Significant A Sands recovery improvement is possible with strategic reservoir management practices. Several activities were undertaken to understand relative immaturities across the field and investigate methods to improve the performance of Kuparuk A Sands. These include: identifying geologically controlled reservoir performance regions, developing a state-of-the-art full field reservoir model, testing pattern realignment that combines infill drilling with reconfiguration of existing wellbores, and conducting injectivity treatments in various parts of the field. The analysis of available data shows the benefits of increasing the throughput in the Kuparuk A Sands through voidage balancing, improved produced water and gas handling strategies, waterflood pattern realignment, continued in-fill drilling, and increased injectivity. Kuparuk reservoir management has been revised to focus future activities around these core strategies tailored to specific reservoir regions. The intent of this paper is to document strategies that can be implemented to revitalize mature waterflood fields, specifically those that have been developed with commingled reservoirs.
Neural Network-Assisted Clustering for Improved Production Predictions in Unconventional Reservoirs
Authors: Cornelio Jodel , Mohd Razak Syamil , Cho Young , Liu Hui-Hai , Vaidya Ravimadhav , Jafarpour Behnam 
Published: May 2023

Abstract
Given sufficiently extensive data, deep-learning models can effectively predict the behavior of unconventional reservoirs. However, current approaches in building the models do not directly reveal the causal effects of flow behavior, underlying physics, or well-specific correlations; especially when the models are trained using data from multiple wells of a large field. Field observations have indicated that a single reservoir does not have similar production behaviors. This makes pre-filtering the data to build local models that capture region specific correlations more pertinent than a single global model that will provide averaged-out predictions from different correlations.
In this work, we investigate a sophisticated network architecture to expedite the clustering process by training the global model. We utilize attention-based (transformer) neural networks for the input data before mapping to the target variable to extract the attention scores between well properties and the production performance. We leverage the interpretability from these attention-based models to improve the prediction performance for data-centric models derived from clustered datasets. We show the benefits of building local models that are more accurate as they learn correlations that are more region/data specific. Specifically, by utilizing the attention mechanism, we can separate and curate data subsets to train local models, improving the prediction performance by reducing the variability in the entire field.
An Uncertainty Risk Evaluation Tool for Wellbore Leakage Prediction for Plug and Abandonement (P&A)
Authors: Ugarte Esteban R. , Salehi Saeed 
Published: May 2023

Abstract
Oil and gas wells leakage is a major concern due to the associated risks. Potential issues include habitat fragmentation, soil erosion, groundwater contamination, and greenhouse gas emissions released into the atmosphere. An estimated 2 million abandoned oil and gas wells are believed to be leakage. Proper Plug and Abandonment (P&A) operations are required to ensure these wells are correctly disposed of from their useful operational life. This study aims to build an uncertainty evaluation tool to statistically classify the risk of a well from leaking based on their well information (age, location, depth, completion interval, casings, and cement). Data consists of leakage reports and available well data reports from Alberta Energy Regulator (AER) in Canada. Multiple preprocessing techniques, including balancing the data, encoding, and standardization, were implemented before training. Multiple models that included Naïve Bayes (NB), Support Vector Machine (SVM), Decision Trees (DT), Random Forest (RF), and K-Nearest Neighbors (KNN) were compared to select the best-performing for optimization. RF outperformed the other models and was tuned using hyperparameter optimization and cross-validation. The final model's average accuracy was 77.1% across all folds. Multiple evaluation metrics, including Accuracy, Confusion Matrix, Precision, Recall, and Area Under the ROC Curve (AUC), were used to assess the model and each class against the rest. Feature importance showed an even distribution across the different features used. The model presented in the study aimed to classify wells and label the leakage risk based on the well information associated with its components. This risk evaluation tool could help reduce gas emissions by 28.2% based on the results obtained. This tool can classify the wells to speed the selection process and prioritize wells with higher leakage risk to perform P&A operations and minimize emissions.
From Nano-Pores to Wellbores and Back: Scale-Dependent Fluid Flow and Storage Systems in Unconventional Reservoirs
Authors: Reichhardt David , Hoffman B. Todd 
Published: May 2023

Abstract
Pore-scale dependent phase behavior describes a decrease in the hydrocarbon phase envelope as pore throat size decreases. This phenomenon is well documented in terms of confining effects on phase behavior with several analytical fluid models proposed that account for these effects. Results from a limited number of numerical reservoir models show the effects pore-scale phase behavior has on total production. However, fewer studies consider fluid transfer between different scale pore networks as a function of scale-dependent phase behavior. This work investigates fluid transfer between different scale pore networks related to scale-dependent phase behavior and the affects it has on production and fluid composition in the pore networks.
A commercially available reservoir simulator is used with a dual porosity/permeability grid and scale-dependent fluid models to study the fluid transfer between pore networks. Fluid tracking is used to trace fluid phases and components that originate in both the nanoscale and macroscale pore networks. Fluid transfer between pore networks is considered at both the pore network scale and at the well stream scale by tracking the fluid components from nano-scale pores into macro-scale pores and ultimately to the well bore. The results from the model are used to quantify fluid transfer between pore networks.
The results of the study show how the confining effects on fluid phase behavior affect fluid production rates and gas-oil ratios by linking the pore scale processes to the well stream scale production. For example, as fluid moves from the nanoscale pores, where the bubble point is suppressed and the fluid retains the initial solution gas-oil ratio (Rs), into the macro scale pores, the fluid in the macroscale pores is enriched by the nanoscale pore fluid.
This work provides three main contributions to an improved understanding and characterization of unconventional plays. The first is demonstrating the ability to simulate the confining effects on fluid phase behavior using commercially available reservoir simulators. Second is the ability to capture some of the unique production trends observed for tight oil reservoirs, e.g., extended periods of stable GOR, when modeling these reservoirs. The third contribution is in tight oil EOR, providing insight into the composition of the fluid that remains in the pore networks following primary depletion or at the onset of an EOR process.
Optimizing Oil Recovery and CO2 Sequestration in Carbonate Reservoirs using Voidage Replacement and Production Balancing Methods
Authors: Hamdi Zakaria , Al-hadrani Mohammed Ahmed , Bataee Mahmood 
Published: May 2023

Abstract
Replacement of voidage relates to the method of injecting liquids to replace oil, water and gas inside the reservoir. The technique for voidage replacement is the volume of injected fluids in the barrel over the volume they got produced. Injected liquids may be wasted outside the floodable quantity of the pore in the reservoir during injection, because of many factors such as bad cement in the casing leakage, etc. A Voidage Replacement Ratio of 1.2 is chosen to preserve the replaced fluid pressure of the reservoir. The balancing Production technique relates to the determination of a scheduled rate of production to be accomplished at a particular time. To preserve the reservoir pressure, a production balancing ratio of 1.2 should be selected for a higher production rate that is balanced with the injected fluids. The balancing production approach involves ensuring that the liquids injected fulfil the production ability needed to prevent any reservoir pressure unbalance. The water alternating gas (WAG) method is the technique to improve oil recovery by injecting water to enhance sweep effectiveness. If gas is being injected into this technique, the viscosity of the oil will be reduced, making it convenient for the water to sweep it well into the production wells. WAG-365 case of a 365-day cycling period is the best one to be selected as longer time provides the gas with the opportunity to guarantee two things, sweeping the residual oil that is immobile and trapped inside the tight pores and also dissolving in the oil and reducing its viscosity. CO2 sequestration relates to the subterranean CO2 injection method to prevent the atmosphere from CO2 emissions from burning fossil fuels that subsequently lead to global warming and hazardous climate change. Throughout the WAG method, CO2 is used and injected to be stored as a solution and the quantity of CO2 stored is defined by changing the solubility of the gas. The more the gas's solubility results in a large quantity of stored CO2.