bluuebunny/crossref_metadata_2025_split huggingface dataset:
Penentuan Wilayah Lokasi Tempat Pembuangan Akhir (TPA) Sampah Kabupaten Kediri Jawa Timur
Authors: Sukartani Ni Made , Suji Suji 
Published: June 2022

This study was conducted to determine the location of the final waste disposal site in Kediri Regency. The district has a very large potential for waste generation, on the other hand it only has one landfill location, while the location is close to the airport development plan, thus requiring a new location that is adequate, strategic, economical and environmentally friendly. The methodology used is a qualitative research method, using primary and secondary data, with data collection techniques through observation, interviews, literature study and documentation. Determination of the location of an adequate, strategic, economical and environmentally friendly waste landfill site is carried out through regional analysis, allowance analysis and determination. Based on this analysis, alternative locations for landfills in Kediri Regency are generated in four villages located in two sub-districts, namely Mojo Village and Sukoanyar Village in Mojo District and Selopanggung Village and Sidomulyo Village in Semen District.
MENINGKATKAN MANAJEMEN PEMASARAN, BRAND IMAGE DAN INOVASI PRODUK PADA UMKM “OPAK DIFAH” DESA LERAN, KECAMATAN MANYAR, KABUPATEN GRESIK
Authors: Tobing Diana Sulianti K. , Aini Huzainatul 
Published: June 2022

Pandemi COVID-19 memberikan implikasi ekonomi, sosial, dan politik. Tidak hanya di Negara-negara besar akan tetapi hampir seluruh negara di dunia. Dalam situasi pandemi ini, menurut Kemenkop UKM ada sekitar 37.000 UMKM yang memberikan laporan bahwa mereka terdampak sangat serius dengan adanya pandemi ini ditandai dengan: sekitar 56 persen melaporkan terjadi penurunan penjualan, 22 persen melaporkan permasalahan pada aspek pembiayaan, 15 persen melaporkan pada masalah distribusi barang, dan 4 persen melaporkan kesulitan mendapatkan bahan baku mentah (Kemenkop UKM, 2020). Desa Leran merupakan salah satu desa yang berada di Kecamatan Manyar, Kabupaten Gresik. Desa Leran memiliki potensi berbagai jenis usaha yang ada. Salah satunya terdapat wirausaha Opak, yang dikelola oleh Ibu Maimunah. System penjualan Opak ini dijual secara offline melalui pasar. Namun ditengah pandemic ini kesulitan pemasaran akibat kebijakan social distancing. Hal ini mengakibatkan kesulitannya peningkatan penjualan. Oleh karena itu diperlukan merencanakan program sebagai dorongan manajemen pemasaran dalam bisnis Opak mulai dari pengembangan kualitas produk, serta pengembangan kemasan dan perluasan pasar dengan digital marketing yang akan membantu usaha Opak dalam meningkatkan penjualan.
ILMU FALAK (Dimensi Kajian Filsafat Ilmu)
Authors: Mujab Sayful , Nasir M. Rifa Jamaludin 
Published: June 2022

Artikel ini membahas bagaimana Ilmu Falak diulas dalam filsafat ilmu. Data penelitian digali dari berbagai literatur ilmiah dan selanjutnya dianalisis secara kualitatif. Hasil penelitian menunjukkan bahwa Ontologi, Epistemologi, dan Aksiologi Ilmu Falak menjadi kajian penting bagi eksistensi Ilmu Falak sebagai ilmu yang mapan dalam dunia ilmu.

This article discusses how Ilmu Falak is reviewed in the philosophy of science. The research data were extracted from various scientific literature and then analyzed qualitatively. The results showed that the Ontology, Epistemology, and Axiology of Ilmu Falak became an important study for the existence of Ilmu Falak as a science that is well established in the world of science.
Scaffolding Process Based on Error Analysis in Solving the Problem: Second Order Differential Equation
Authors: Noor Naili Luma'ati 
Published: June 2022

<p class="06ContentAbstract">Error analysis in solving mathematics problems is needed to be done so that the lecturer and the students can find out the students’ error in solving the problems. So, in the future the lecturer will administer the more appropriate scaffolding. The aim of this research is to analyze the appropriate scaffolding administered for the students based on error identification according to the Newman procedure of the students in solving second order differential equation. The method of this research was qualitative research case study design. The subject of the research was the students of mathematics education study program at IAIN Kudus who took differential equation class in the first semester in the academic year 2021/2022. The technique for data collection used were test and interview techniques. The result of the research of scaffolding administered for the students was by the techniques of inviting student participation, the students who performed comprehension errors obtained scaffolding in the form of offering explanations and verifying and clarifying student understandings, the students who performed transformation errors obtained offering explanations and modeling of desired behaviors techniques, the students who performed process skill errors obtained scaffolding in the form of Inviting students to contribute clues and Inviting student techniques, and the students who performed encoding errors obtained scaffolding in the form of Inviting student participation.</p><p class="06ContentAbstract"> </p><p class="07Keywords">Analisis kesalahan dalam menyelesaikan masalah matematika perlu dilakukan agar dosen dan mahasiswa dapat mengetahui kesalahan mahasiswa dalam menyelesaikan masalah. Jadi, kedepannya dosen akan mengelola scaffolding yang lebih tepat. Penelitian ini bertujuan untuk menganalisis scaffolding yang tepat diberikan kepada siswa berdasarkan identifikasi kesalahan menurut prosedur Newman siswa dalam menyelesaikan persamaan diferensial orde dua. Metode penelitian ini adalah penelitian kualitatif dengan desain studi kasus. Subyek penelitian ini adalah mahasiswa program studi pendidikan matematika di IAIN Kudus yang mengambil mata kuliah persamaan diferensial pada semester I tahun ajaran 2021/2022. Teknik pengumpulan data yang digunakan adalah teknik tes dan wawancara. Hasil penelitian scaffolding yang diberikan kepada siswa adalah dengan teknik mengundang partisipasi siswa, siswa yang melakukan kesalahan pemahaman memperoleh scaffolding berupa menawarkan penjelasan dan memverifikasi dan memperjelas pemahaman siswa, siswa yang melakukan kesalahan transformasi memperoleh penjelasan menawarkan dan teknik pemodelan perilaku yang diinginkan, siswa yang melakukan kesalahan keterampilan proses memperoleh scaffolding berupa mengundang siswa untuk menyumbangkan petunjuk dan teknik Mengundang siswa, dan siswa yang melakukan kesalahan encoding memperoleh scaffolding berupa mengundang partisipasi siswa.</p>
Think You Know Where Proppant Goes During Fracturing? Based on Recent Testing: Don’t Bet on It
Authors: Rassenfoss Stephen 
Published: June 2022

Completion engineers have figured out some rules of thumb about how proppant flows based on decades of experience.
That knowledge was put to the test when GEODynamics created a fracturing surface test that offered a full-size, full-pressure recreation of a stage design created by its initial backer, PDC Energy.
Before the oilfield service company’s first test was pumped. those involved put their money into a pool with the winner based on who most accurately predicted how much sand flowed out of each cluster.
“The one that won the bet was the CFO who had no idea how fracs were supposed to work. The worst were the ones that thought they knew fracturing,” said Phil Snider, a consultant on the project who played a key role in the design of the test.
Like the pool, the test results diverged from the widespread assumption that the fluid and the sand flow out in roughly equal proportions at each cluster.
The results suggested “proppant and fluid does not move as uniformly as many believe,” said Steve Baumgartner, senior engineering technical advisor at GEODynamics, while describing the testing at the recent SPE Hydraulic Fracturing Technology Conference and Exhibition (HFTC).
Some of the results were consistent with earlier studies using computer modeling and less-realistic flow tests showing that many fast-flowing sand grains slip past the first few clusters in a stage.
GEODynamics found that medium-sized proppant (40–70 mesh) is likely to slip past early stages, resulting in reduced outflow in early clusters and more flowing out later in the stage. But if the grains are smaller (100 mesh), the distribution is more even.
A second round of tests showed that a change in the fracture design aimed at achieving more even slurry distribution from cluster to cluster further reduced the differences among clusters, but bigger grains still tended to slip past early clusters.
What GEODynamics made public is a first look at an ingenious bit of engineering used for a series of tests that ended in 2019, before COVID-19 hit (SPE 209141).
The idea for the test goes back to questions raised by past fracturing jobs. For example, when a well where data gathered during fracturing indicated all clusters were effectively stimulated, but later analysis indicated about half of them failed to produce. Why?
“This nonuniformity can be attributed in part to formation variability and stress shadowing from adjacent fracture stages, but nonuniform flow of proppant in the casing can also play an important role,” said a second paper on creating a model for completion engineering.
The notion that sand grains and fluid do not move in lockstep does not seem surprising because sand grains are likely to behave differently from a mix of water and friction reducer.
The hard question for any engineer who wants to begin designing completions based on the assumption that fluid and sand flows are not similar is how to quantify that difference.
The World Casts New Eyes on Nuclear
Authors: Wright Blake 
Published: June 2022

Images conjured by the mere mention of the term “nuclear energy” are almost always negative. From Chernobyl to Fukushima, the power source has a historically bad reputation and the stigma of catastrophe. Winston Churchill knew those that failed to learn from history were doomed to repeat it, and perhaps it is lessons learned that have so many countries once again casting a keen eye over conventional nuclear energy as a potential key player in the low-carbon future.
For the first time in more than a decade, most Japanese are in support of restarting idled nuclear facilities, according to a poll conducted by Nikkei. Rising power prices and the potential for electricity shortages in Tokyo are said to have swayed many back to being in favor of nuclear power just 10 years after the Fukushima disaster. The poll found 53% of respondents in favor of restarting the reactors if safety could be assured, while 38% said they should remain shut.
With Russia continuing its invasion into neighboring Ukraine, many European countries are looking to rid themselves of dependence on Russian natural gas imports. Many have grown so dependent they cannot fully shut the stream off for fear of economic collapse, however several are attempting to rework their own energy policies and favoring nuclear as a solution. Both France and the UK have reversed course on nuclear in recent months. Just ahead of Russia’s invasion of Ukraine, French President Emmanuel Macron called for a nuclear renaissance in his country after earlier vowing to cut its reliance on nuclear power. The UK, which gets 15% of its electricity from nuclear power, had vowed to shutter all but one of its plants ahead of the Russian invasion. More recently, Prime Minister Boris Johnson is favoring the construction of new plants and boosting Britain’s electrical generation from nuclear to 25%.
As for the US, at the end of 2021 there were 55 commercially operating nuclear power plants with 93 nuclear power reactors in 28 states. The newest nuclear plant to enter service in the US was Watts Bar Unit 2, which began commercial operations in 2016. Two new nuclear reactors are actively under construction: Georgia Power’s Vogtle Units 3 and 4 in Waynesboro, Georgia.
A recent Pew survey found that while a majority of Americans (69%) favor the US taking steps to become carbon neutral by 2050, only around a third of US adults (35%) say the federal government should encourage the production of nuclear power, while about a quarter (26%) say the government should discourage it (Fig. 1). This survey was fielded before the Russian invasion and the renewed discussions about nuclear power it has prompted.
According to the US Energy Department’s Office of Nuclear Energy, nuclear power currently provides 52% of the US’s carbon-free electricity, and the Biden administration has identified the current fleet of 93 reactors as a vital resource to achieve net-zero emissions economywide by 2050.
Modeling, Planning Allow Successful Implementation of South Texas U-Turn Lateral
Authors: Carpenter Chris 
Published: June 2022

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 208801, “Successful Planning and Implementation of First South Texas U-Turn Lateral,” by Riley Schultz and Joe Kiefner, Chesapeake Energy. The paper has not been peer reviewed.
Legacy fields require innovative solutions for developing capitally efficient projects within highly developed acreage blocks. As another tool to improve well economics, a U-turn lateral strategy was implemented in the Eagle Ford Shale. This wellbore trajectory resulted in capturing a 9,200-ft equivalent lateral length well in a 5,000-ft-wide lease space. This successful U-turn trajectory test has created new economic project opportunities for the company and has increased optionality within challenged lease spaces across the field.

Well Overview
In a single U-turn well, the horizontal wellbore turns 180° to create two parallel laterals in a map-view U shape. The successful U-turn project detailed in the complete paper was the first drilled in south Texas (Fig. 1). This resulted in significantly improved economics by using a horizontal turn as a hydrocarbon pathway, rather than an additional vertical section from a new well to gain the equivalent treatable lateral length.
This well followed operator standards for south Texas Eagle Ford two-casing-string well design. A 9⅝-in. casing was set to protect shallow water zones, and an 8¾-in. production section was drilled for the remainder of the well (using 5½-in. drillpipe). 5½-in. production casing was then run to total depth (TD). 8¼-in. centralizers were placed on each joint of the casing, freely floating between the collars. The production section was drilled with oil-based mud, and a standard cement job was pumped. Conventional directional tools were used for the entirety of the drilling phase.
The decision was made early in the planning phase of the well to forgo fracturing the turn portion of the wellbore and instead drill into the adjacent unit to conduct the turn to maximize the amount of optimally oriented lateral footage in the unit to be produced.
Examining the groundwater level in a semi-arid district of eastern India: spatiotemporal trends, determinants, and future prospects
Authors: Goswami Tarun , Ghosal Somnath 
Published: June 2022

Abstract
The present study aims to examine the spatio-temporal and seasonal fluctuation of groundwater levels in an eastern Indian semi-arid region. Also, it attempted to investigate the involvement of different significant groundwater usage factors in causing such variations and trends. Furthermore, by evaluating temporal patterns and the influence of the crucial drivers, generate meaningful predictions for raising community awareness about the future. A combination of statistical, spatial analysis, and machine learning techniques were used to fulfill the objectives. Overall, the findings revealed that the south-eastern corner (consisting of Bundwan and Barabazar Blocks), the far western region (especially Jhalda I and II Blocks), and some of the eastern Blocks are most vulnerable to groundwater scarcity. The monitoring stations in this region are typically suffering a significant declining trend in groundwater level, with a substantial amount of Sen's Slope. In contrast, the centrally positioned Blocks have lesser susceptibility. The MLR analysis and spatial thematic maps demonstrate a strong association between this spatial pattern of declining groundwater table and the groundwater drivers in consideration. Thus, it is acceptable to suggest that drivers from the human world must be included in the groundwater management planning of the Purulia district. Finally, the predictions from the time series confirm that if no interventions are implemented, the average groundwater level will decline by 2.5 meters by 2030. Therefore, Purulia urgently requires a realistic plan to prevent future generations from becoming refugees in their own land.
Tunable properties of the absorption in a binary photonic crystal having a metamaterial as a defect layer and two graphene sheets in the range of GHz
Authors: Almawgani Abdulkarem H. M. , Sharma Arvind , Daher Malek G. , Taya Sofyan A. , Colak Ilhami , Patel Shobhit K. 
Published: June 2022

Abstract
Light absorption is essential in the construction of photodetectors and photovoltaic applications. In this work, the absorption properties of a defective photonic crystal are analyzed in the GHz region using the transfer matrix method. The defect layer is assumed to be a metamaterial of negative optical parameters sandwiched between two sheets of graphene. The tunable properties of absorption are investigated with the graphene chemical potential and phenomenological scattering rate and the thickness of the metamaterial layer. The results reveal that the number, position and height of the absorption resonant peaks are tuned by graphene optical properties. The spectra are studied with and without graphene sheets and an extra peak is created when two sheets of graphene are inserted on both sides of the metamaterial. The proposed photonic device can be useful in designing graphene and metamaterial-based optical devices such as absorbers, filters and sensors in the GHz region.
The Risk Assessment of Relapse among Newly-enrolled Participants in Methadone Maintenance Treatment: A Group-Lasso Based Bayesian Networks Study
Authors: Tang Xijia , Fan Chaonan , Wang Chijie , Wang Wenjuan , Chen Zouxiang , Xu Chaofan , Ling Li 
Published: June 2022

Abstract
Relapse is a great barrier to improving the effectiveness of methadone maintenance treatment (MMT). Participants with different treatment durations could vary in the compliance with MMT, which may lead to different levels of relapse risk. This study aims to identify the risk factors for relapse and assess the relapse risk of MMT participants of different treatment durations. This retrospective study used data collected from 9 MMT clinics in Guangdong Province, China from January 2010 to April 2017. Newly enrolled participants who received 6 (n = 903) and 12 (n = 710) months of consecutive treatment with complete data were include. We selected significant risk factors for relapse through group-lasso regression and then incorporated them into Bayesian networks to reveal relationships between factors and predict the relapse risk. The results showed that participants who received 6-month treatment had a lower relapse rate (32.0%) than those of 12-month (39.0%, P<0.05). Factors including personally living status and daily methadone dose were only influential to those who received 6-month treatment rather than those after 12-month treatment. However, age, age at the initial drug use, HIV infection status, sexual behaviors, and continuous treatment days were common factors of both durations. The highest relapse risk for those after 6-month treatment was inferred as 66.7% while that of 12-month treatment was 83.3%. Farmers and those who have high accessibility to MMT services may require additional attention. Therefore, it is of necessity to implement targeted interventions and education based on the treatment durations of participants to decrease the relapse rate. Meanwhile, those about HIV/sexually transmitted infection prevention and anti-narcotics should be held in the entire process.
COVID-19 vaccination trends and side effects among Egyptian hemodialysis patients: a multicenter survey study
Authors: Nassar Mohammed Kamal , Salem Karem Mohamed , Abdel-Gawad Sara M , Tharwat Samar 
Published: June 2022

Abstract
Background: Patients on chronic hemodialysis (CHD) for end stage kidney disease (ESKD) face unique circumstances that increase their risk of infection with coronavirus disease (COVID-19). Vaccination may be a key intervention to prevent infection in these patients. This study aimed to determine the COVID-19 vaccination status in Egyptian CHD patients and analyze the safety and detailed side effect profile of COVID-19 vaccine among these patients. Methods:This survey-based study conducted on 670 ESRD patients on CHD at the period from 3 December 2021 to 5 February 2022. Subjects were asked about sociodemographic characteristics, clinical and therapeutic data, history of COVID-19 infection, associated symptoms and sequalae in addition to their COVID-19 vaccination status. If the subject had been vaccinated, we inquired about the type of vaccine and the side effects that occurred within few days after administrating of the first and second dose of COVID-19 vaccine. Additionally, subjects were inquired about the onset of side effects (days from vaccination), timing of maximum symptoms, intensity of symptoms and their effect on activity and need for medical attention.Results:The study included 670 CHD patients with mean age of 50.79 years ,58.1% were females. Of them, one hundred and seventy-three patients (25.8%) had previously been infected with COVID-19. About three fourths (72.2%) reported that healthcare providers (HCP) strongly endorsed COVID-19 vaccine. The vast majority (614; 91.6%) of the studied patients received 2 doses of the vaccine. AstraZeneca and Sinopharm were the most used vaccines (50.3% and 35.5% respectively). Side effects were commonly reported after the first dose than the second dose. The main general side effects that reported after the first dose were generalized weakness/fatigue (56%), headache (43.8%) and fever (40.4%). Sore arm/pain was reported in about one third (29.3%) after the first dose. Myalgia and generalized muscle pain was reported in 90 (14.7%) patients after the first dose and 9 (1.5%) after both doses. Anxiety (25.4%), psychological stress (12.9%), increase in sleep (9.3%), depression (2.8%) and decrease in memory (2%) were reported among recipients after the first dose and rarely reported after the second one. Adverse events mostly occurred within one day after vaccination and the maximum symptoms usually happened at the second day. The median duration of symptoms was 3 days with maximum duration up to 5 days. Only 4.2% required transient time off from work.Conclusions:Our preliminary findings support the favorable short term safety profile of COVID-19 vaccine among CHD patients and hence, can reassure both clinicians and patients, as well as promote further COVID-19 vaccine administration among these patients.