bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENGEMBANGAN PERANGKAT PEMBELAJARAN IPA BERBASIS KEARIFAN LOKAL UNTUK MENINGKATKAN HASIL BELAJAR KOGNITIF SISWA
Authors: Siti Khaerani Halimah , Utami Septiana Dwi , Mursali Saidil 
Published: March 2021

Abstrak: Pengintegrasian potensi lokal suatu daerah dalam pembelajaram masih sangat kurang terutama pada pelajaran IPA.Penelitian ini bertujuan untuk mengembangkan perangkat pembelajaran IPA berbasis kearifan lokal untuk meningkatkan hasil belajar kognitif siswa serta mendeskripsikan hasil belajar kognitif siswa setelah diajarkan menggunakan perangkat pembelajaran IPA berbasis kearifan lokal yang telah dibuat. Penelitian ini merupakan penelitian pengembangan yang menggunakan model 4-D, desain penelitian ini menggunakan one group pre test and post test. Instrumen penelitian meliputi lembar validasi, lembar observasi keterlaksanaan pembelajaran, lembar tes hasil belajar kognitif, dan angket respon siswa. Analisis data hasil validasi, keterlaksanaan pembelajaran dan angket, dilakukan secara deskriptif kualitatif sedangkan untuk tes dianalisis berdasarkan ketuntasan individu dan N-Gain. Berdasarkan hasil penelitian didapatkan skor rata-rata untuk perangkat pembelajaran yang dikembangkan 3,2 untuk silabus dan 3,61 untuk RPP dengan kategori valid dan sangat valid. Skor rata-rata dari keterlaksanaan pembelajaran 10,5 dengan persentase 87,65% interpretasi sangat baik. Skor rata-rata pre-tes 32,4 dan post-test 76,6 hasil ini menandakan adanya peningkatan hasil belajar siswa sehingga didapatkan rata-rata N-Gain 0,64 kategori sedang. Analisis rata-rata angket respon siswa berjumlah 3,6dengan kategori sangat baik, ini menunjukkan bahwa siswa memberikan respon yang positif terhadap proses pembelajaran yang telah dilakukan.Berdasarkan hasil tersebut dapat disimpulkan bahwa perangkat pembelajaran IPA berbasis kearifan lokal dapat meningkatkan hasil belajar kognitif siswa. Kata kunci: Perangkat Pembelajaran, Kearifan Lokal, Hasil Belajar
IMPLEMENTASI STRATEGI REACT TERHADAP HASIL BELAJAR DAN KETERAMPILAN SOSIAL PESERTA DIDIK
Authors: Maulida Hafizatul , Syahmani Syahmani , Sari Mella Mutika 
Published: March 2021

Abstrak: Telah dilakukan penelitian tentang implementasi strategi relating, experiencing, applying, cooperating, transfering (REACT) terhadap hasil belajar dan keterampilan sosial peserta didik materi pencemaran lingkungan kelas VII di SMPN 13 Banjarmasin. Penelitian ini bertujuan untuk mengetahui (1) signifikansi perbedaan hasil belajar pengetahuan peserta didik antara penerapan strategi pembelajaran REACT dengan pembelajaran konvensional, (2) peningkatan hasil belajar pengetahuan peserta didik melalui penerapan strategi pembelajaran REACT, (3) signifikansi perbedaan keterampilan sosial peserta didik antara penerapan strategi pembelajaran REACT dan pembelajaran konvensional, (4) peningkatan keterampilan sosial peserta didik melalui penerapan strategi pembelajaran REACT. Penelitian ini menerapkan metode quasi eksperimental dengan menggunakan pretest-posttest nonequivalent control group design. Teknik pengambilan sampel yang digunakan yaitu porpusive sampling. Sampel penelitian yaitu peserta didik kelas VII D terdiri dari 25 orang sebagai kelas eksperimen dan peserta didik kelas VII A terdiri dari 29 orang sebagai kelas kontrol. Teknik pengumpulan data menggunakan teknik tes dan observasi. Teknik analisis menggunakan uji independent dan paired sampel t test untuk data hasil belajar pengetahuan. Uji Kruskall-Wallis dan uji urutan bertanda Wilcoxon untuk data keterampilan sosial, dan juga analisis deskriptif. Hasil penelitian menunjukkan bahwa (1) terdapat perbedaan hasil belajar pengetahuan yang signifikan antara kelas ekperimen dengan kelas kontrol dengan nilai signifikansi 0,03 0,05, (2) terdapat peningkatan hasil belajar pengetahuan peserta didik menggunakan strategi REACT dengan nilai n-gain 0,6 (sedang) dan nilai signifikansi 0,00 0,05, (3) terdapat perbedaan keterampilan sosial peserta didik antara penerapan strategi pembelajaran REACT dengan pembelajaran konvensional dengan hasil uji Kruskall-Wallis dengan nilai signifikansi 0,00 0,05, (4) terdapat peningkatan keterampilan sosial peserta didik menggunakan strategi REACT dengan nilai signifikansi 0,00 0,05. Kata kunci: Strategi REACT, hasil belajar pengetahuan, keterampilan sosial, pencemaran lingkungan
DESAIN PERANGKAT PEMBELAJARAN KOOPERATIF BERBASIS EKSPERIMEN UNTUK MENINGKATKAN TANGGUNG JAWAB DAN PEMAHAMAN KONSEP PESERTA DIDIK DALAM PEMBELAJARAN FISIKA
Authors: Ningtyas Tria Ratna , Susilowati Eko , Suyidno Suyidno , Zainuddin Zainuddin 
Published: March 2021

Abstrak: Pembelajaran fisika yang kurang melibatkan partisipasi peserta didik menjadikan pemahaman konsepnya masih rendah. Sehingga, penelitian ini bertujuan untuk menghasilkan desain perangkat pembelajaran kooperatif berbasis eksperimen yang layak untuk meningkatkan tanggung jawab dan pemahaman konsep fisika peserta didik. Data diperoleh dari lembar penilaian validasi perangkat pembelajaran fisika, lembar pengamatan keterlaksanaan RPP dan tanggung jawab, serta tes pemahaman konsep fisika. Model pengembangan yang digunakan ADDIE dan diujicobakan pada 20 peserta didik kelas XA Multimedia SMK Negeri 1 Banjarmasin. Hasil penelitian menunjukkan: (1) komponen perangkat pembelajaran termasuk valid berdasarkan penilaian pakar, (2) keterlaksanaan RPP dengan kriteria baik, (3) tanggung jawab peserta didik dengan kriteria baik, dan (4) nilai n-gain pemahaman konsep dengan kriteria sedang. Dengan demikian, desain perangkat pembelajaran koopertif berbasis eksperimen yang dikembangkan termasuk layak untuk meningkatkan tanggung jawab dan pemahaman konsep dalam pembelajaran fisika. Kata kunci: Eksperimen, pemahaman konsep, pembelajaran kooperatif, tanggung jawab
Pengaruh Sistem Pendidikan terhadap Perilaku Pencegahan Penyakit HIV/AIDS pada Siswa SMP di Surakarta
Authors: Fajriani Ramadhaningtyas Maghfirotul , Hardjono Hardjono , Sumardiyono Sumardiyono 
Published: March 2021

<p class="Abstract" align="left">ABSTRAK</p><p class="AbstractNormal"><strong>Pendahuluan: </strong>HIV/AIDS menjadi salah satu masalah utama kesehatan dan sosial karena penyebaran penyakit HIV/AIDS dipengaruhi oleh perilaku individu. Pembentukan perilaku individu dipengaruhi oleh faktor internal dan eksternal, salah satunya adalah lingkungan sekolah. Berdasarkan hasil penelitian sebelumnya ditemukan adanya sikap positif terhadap HIV/AIDS lebih banyak pada kelompok responden di pesantren, namun terbatas hanya pada sikap. Karena itulah, peneliti ingi mencari tahu pengaruh sistem pendidikan terhadap perilaku pencegahan penyakit HIV/AIDS pada siswa SMP yang ada di Surakarta.</p><p class="AbstractNormal"><strong>Metode:</strong><strong> </strong>Penelitian ini merupakan penelitian analiktik observasional menggunakan metode potong lintang <em>(cross sectional</em>) dengan jumlah subjek sebanyak 100 siswa. Rincian subjek yaitu 50 siswa bersekolah dengan sistem pendidikan umum (<em>non-boarding school</em>) dan 50 siswa bersekolah dengan sistem pendidikan <em>boarding school</em>. Pengumpulan data dilakukan dengan cara pengisian kuesioner. Hubungan antar variabel dianalisis menggunakan <em>Chi-square</em> dan diolah menggunakan penghitungan statistik</p><p class="AbstractNormal"><strong>Hasil dan pembahasan:</strong><strong> </strong>Karakteristik subjek penelitian yang diteliti adalah jenis kelamin, umur, dan pendidikan orang tua. Jumlah laki-laki lebih sedikit (48%) dibanding jumlah perempuan (52%). Umur ditemukan kelompok 14 tahun (68%), 13 tahun (22%), 15 tahun (10%). Pendidikan orang tua ditemukan jumlah tamat perguruan tinggi lebih banyak (52%) dibandingkan tamat SMA (48%). Hasil penghitungan statistik menggunakan <em>Chi-square</em> menunjukkan sistem pendidikan bermakna secara statistik terhadap perilaku pencegahan penyakit HIV/AIDS pada siswa SMP di Surakarta dengan p=0,009. Hal ini bisa terjadi karena pembelajaran agama yang lebih efisien, pembatasan penggunaan telepon seluler dan akses internet, serta meminimalisir hubungan antara lawan jenis.</p><p class="AbstractNormal"><strong>Kesimpulan: </strong>Terdapat pengaruh yang signifikan antara sistem pendidikan terhadap perilaku pencegahan penyakit HIV/AIDS pada siswa SMP di Surakarta.</p>
The Origin of Terraces in Buried Valleys in the Northwest of the East European Plain
Authors: Karpukhina N.V. , Bricheva S.S. , Konstantinov E.A. , Tatarnikov O.M. , Makkaveev A.N. , Zakharov A.L. 
Published: March 2021

Abstract
—The paper considers the origin of terraces that often complicate the slopes of abnormally deep buried valleys in the northwest of the East European Plain. The Izborsk–Maly valley (Pskov Region, Russia), which is half filled with Quaternary sediments, was chosen as the object of study. Since the upper part of the valley remains unfilled, it is possible to study in detail both geologic and geomorphologic structures of its terraced slopes being of particular interest in the context of the origin of buried valleys and the role of substrate in it. The four denudation-terrace levels that have been identified on the slopes of the Izborsk–Maly valley at absolute elevations of 53, 56–58, 70–72, and 75–77 m formed during the destruction of the preglacial karst landscape under the influence of Pleistocene glaciations. The formation of the terraces was probably linked with several stages of overdeepening of the valley and its expansion by the glacial erosion processes, which corresponded to at least two stages of the ice sheet advance in this area. The last stage may have been the beginning of the Late Valdai (Weichselian) glaciation or the activation of the edge of an ice sheet during its Luga phase (~15.7 cal kyr BP). Results of the study suggest that the Izborsk–Maly valley formed in subglacial conditions. The degree of glacial erosion was determined primarily by the coherence of Devonian carbonate-terrigenous rocks hosting the valley and the degree of the area transformation by karst processes. The cirque shape of slopes is the evidence of karst processes expression in pre-glacial time. Analysis of literature data shows that the origin of denudation terraces in the buried valleys in the northwest of the East European Plain has been paid little attention. The obtained data contribute to the study of this problem and provide insights into the origin of buried valleys.
Correction for Geomagnetic Secular Variation Effects: A New Method (Case Study of the Altai Geodynamic Network)
Authors: Kuleshov D.A. , Dyadkov P.G. , Plotkin V.V. 
Published: March 2021

Abstract
––The study focuses on detection of geomagnetic secular variation and the respective correction of tectonomagnetic data. A new technique is proposed for picking the secular variation component in the Earth’s main magnetic field recorded by precise measurements at 100 to 500 km sites on the surface. Long-period field variations presumably arise from fluid motions in the liquid core, at depths of 3000 km, whereas the sizes of observation networks are within 500 km. The sources of secular variation, irrespective of their configuration, are much deeper than those of tectonomagnetic anomalies located above the Curie surface depths of ~10 to 20 km. Therefore, the surfaces that represent the space distribution of secular variation must be smoother than the respective surfaces for tectonomagnetic anomalies. The problem is thus to separate the regional and local signals from the two types of sources located at different depths. The new method is tested using data of yearly geomagnetic measurements at more than 30 repeat stations of a ~120 km long geodynamic network in Gorny Altai spanning the period from 2004 through 2018. The secular variation pattern is reconstructed by quadratic interpolation. The precise data corrected for secular variation of the main field reveal previously hidden tectonomagnetic anomalies up to 12 nT. The 3 nT positive anomaly falls within the zone of surface deformation caused by the Mw = 7.3 Chuya earthquake of 27 September 2003.
Efficiently Shifting Sliding Sleeves in Extended Reach Horizontal Wells with Electric-Line: A Case Study
Authors: Mauchien Thomas , Kishore Sharat , Olivio Amanda , Ahmed Mostafa 
Published: March 2021

Abstract
Traditional intervention operations with coiled tubing (CT) in extended reach horizontal wells might be difficult to access due to lockup from frictional forces and operational inefficiencies. Using conventional shifting tools requires multiple runs to shift open and close multiple sliding sleeve doors (SSD). This paper is a case study of an electric-line powered shifting intervention operation to shift open an SSD, circulate fluids though the sleeve and into the annulus, and then close and repeat this for another SSD in a long horizontal well—all in a single run.
The paper discusses the different methods that can be used to efficiently seek and latch onto the shifting profiles using a tractor, wireline cable, and the shifting tool itself with an inchworm motion. The electric-line shifting tool monitored and verified the opening and closing of the sleeves in real time using its onboard sensors. These techniques were effectively deployed in multiple wells that required the annulus to be displaced with fluid after running smart completions. The completions were installed in the well with the SSDs in a closed position, and the shifting intervention consisted in opening the SSD, pumping fluids through the sleeve, and closing the SSD. The tool was anchored in place in the wellbore during the entire circulating operation, and the SSD was subsequently closed. This operation was then repeated on the second SSD in the wellbore, and the entire operation was completed in a single run. Also, no additional caliper run was needed as the shifting tool verified the position of the SSDs.
These methods were used in a long horizontal well with the help of real-time measurements. The tool measurements identified if the SSDs were in open or closed position or anywhere in-between. The shifting tool provided confirmation via its measurements that the sleeve was not partially open. This was particularly important when pumping fluid through the annulus to achieve the maximum flow through the sleeve. Operating using electric-line was extremely efficient and eliminated the need to perform multiple runs, thus achieving time savings on the rig.
This is the first time that a paper discusses the different seek methods that can be used for carrying out a electric-line mechanical intervention operation. It represents a novel method using a shifting tool as a caliper to probe and measure the completion inner diameter changes while seeking for the profile. It provides a valuable method for reliably and confidently locating and latching onto a shifting profile. Finally, this is the first time that a paper correlates the theoretical mechanics of shifting a sliding sleeve with consistent results from system integration tests and downhole measurements from the real job.
Fully Automated and Wirelessly Enabled Drillstem Tests: Seven-Zones Campaign Case Study in Sakhalin
Authors: Temer Elias , Subramaniam Deiveindran 
Published: March 2021

Abstract
Well test is one of the crucial steps required to forecast production investments of their fields. However, the operators face many challenges such as reduced capex, exploration budgets, and bad weather conditions that limit the well testing time window. To overcome these challenges, an automated well testing platform enabled a real time monitoring and controlling more zones in a single run for appraisal wells in the Sea of Okhotsk, Russia.
This article highlights the test objectives, the job planning, and automated execution of wirelessly enabled operations in very hostile conditions and limited time period. The use of a telemetry system to well test seven zones allowed real-time data acquisition, control of critical downhole equipment, data transmission to the operator's office in town. Various operational cases will be discussed to demonstrate how automated data acquisition and downhole operations control has optimized operations for both the service company and the operator.
Development of Low Force Shear Blades for High Strength Coiled Tubing
Authors: Sherman Scott 
Published: March 2021

Abstract
As coiled tubing grades have evolved over the past 20 years from 70 grade with a minimum yield strength of 483 MPa (70,000 psi) to 140 grade with a minimum yield strength of 965 MPa (140,000 psi) and wall thicknesses have increased, the resulting force required to shear coil has more than doubled. Most coiled tubing units have a maximum pressure of 20.7 MPa (3000 psi) available for the blow out preventers (BOP) hydraulic circuits. There was an industry need to develop a shear blade for BOPs that could cut high strength coiled tubing using legacy pressure control equipment already in use. Additionally, the new shear blades must create a fish that can be easily retrieved from a wellbore.
Shear strength is estimated using the maximum distortion criterion (von Mises yield criterion) as follows:Shear strength/Yield strength=1√3=.577
Since the maximum distortion criterion is merely an approximation and unique blade geometries are difficult to take into consideration using the above calculation, a considerable amount of hands on lab testing was required to design and optimize an elegant shear blade for cutting high strength coiled tubing with minimal hydraulic forces.
The paper will share the iterative process as novel shear blades were developed that significantly reduced shear forces. Multiple piercing tip geometries were tested, including embodiments with several piercing tips.
Success criteria was reduced shear force, acceptable fish profile on the lower piece of coiled tubing, and no damage to the blades after use. The embodiment that showed the most promise, based on lab testing was further optimized to improve its performance over multiple cuts.
The result was a novel shear blade that is able to cut high strength coiled tubing with 50% of the normal shear force.
As the industry continues to push the limits of coiled tubing with extended reach applications thought impossible only a few years ago, higher strength coiled tubing with increased wall thicknesses will continue to evolve. The new shear blade geometry developed in this project ensures that not only can the latest grades of coiled tubing be sheared in legacy pressure control equipment, but also future grades of coiled tubing that are in development.
Squeezing Perforations Rigless – No Pumping or Injection Required
Authors: Fulks Jeff , Carragher Paul 
Published: March 2021

Abstract
Squeezing perforated intervals is very common in oil and gas wells, either for isolation to produce from another zone or during P&A applications. Though cement is the common material used in this application, sometimes cement is not ideal. A few of these instances are: 1. The formation is too tight to inject a high viscosity fluid like cement. 2. The temperature of the wellbore exceeds the operating temperature of cement. 3. The "void" behind the casing is too large to fill with cement. 4. Remote locations where mobilizing a rig or coil tubing unit is difficult if not impossible.
There is an alternative to cement for "squeezing" perforations that addresses all of these issues, bismuth alloys. Bismuth alloys have a viscosity similar to water and require no pumping or injection into the reservoir. With operating temperatures is up to 325°F, they are suitable for the majority of wells. Unlike cement, bismuth alloys solidify rapidly near the wellbore, isolating the perforations regardless of open volume behind the casing and they are deployed on wireline (rigless).
High Resolution Acoustic Imaging of Plug Related Casing Damage in Hydraulically Fractured Horizontal Wells
Authors: Wardynski Kacper , Battistel Anthony , Littleford Tom , Simpson Greer , Robinson Stephen , Martin Morgan , Anderson Pierce 
Published: March 2021

Abstract
While assessing post-hydraulic-fracture perforation growth using solid-state, high-resolution acoustic imaging tools, it was noted that plug failures were occurring at a high frequency. Though plug failures can be observed from hydraulic fracture surface pressure and flowrate data, the aggregate frequency, causes, and severity of the resulting erosional damage at plug locations was not previously well understood and highly speculative. The sub-millimetric three-dimensional imagery generated from high resolution solid-state acoustic tools significantly improved the industry's awareness of plug failure frequency, mechanisms of failure, and the resulting impact to stimulation efficiency. These acoustic tools helped to uncover the causes and explore possible solutions to failing plugs. This paper presents aggregate data encompassing casing wall loss at over 2700 plug locations and presents emerging trends that appear across the broader dataset. In addition, this paper showcases the usage of high-resolution acoustic imaging in two operator-specific case studies.
Successful Gas Shut Off Operation using a Coiled Tubing Telemetry System: A Case History
Authors: Amirov A. , Hadiaman F. , Parra D. , Zeynalov J. , Kok A. 
Published: March 2021

Abstract
In a deviated well in Caspian Sea gas oil ratio (GOR) increased rapidly in 2017. The result was an oil rate decline with several choke backs to manage GOR build-up. After performing two production-logging jobs, it was confirm that 76% of the gas production was coming from four upper perforations. The main objective was to perform a Gas Shut off (GSO) treatment in two stages to reduce gas production by squeezing polymer into the formation and setting packers at 59° deviation inside 9-5/8 in. casing for temporarily isolation of middle and lower production sands.
Fifteen runs were perform with a tube wire-enabled CT telemetry (CTT) system which consists of a customized bottomhole assembly (BHA) that instantaneously transmits differential pressure, temperature, depth data to surface through a non-intrusive tube wire installed inside the CT. For the first time in the region, a tension, compression and torque (TCT) sub-assembly was deploy to control the entire set/retrieve process with accurate downhole upward/downward forces. CTT technology was a key element to successfully set two Thru Tubing Inflatable Retrievable Packers (TTIRP) by doing casing collar locator (CCL) correlations at tubing end which was 133 m and 228 m (MD) shallower from setting depths. In addition, during second GSO operation, polymer crosslink time was modify based on actual bottomhole temperature recorded with CTT system. Finally, during third GSO treatment placement was improve spotting more GSO system in casing section avoiding further treatments.
After successful placement of the GSO system, a drop from 15.5 to 4.5 MMscf/day in gas production was observed along with GOR reduction from 11,000 to 750 MMscf/bbl and oil rate increment from 1.4 to 6.04 Mbpd. Furthermore, after gas reduction operator was able to produce between 1.5 to 2.0 Mbpd from other wells that were choke back based on gas handling capabilities limitations
The novelty of using the CTT system and TCT sub-assembly for real-time monitoring of BHA data was proven for not only positioning two TTIRP, modifying polymers crosslink design, placing polymer precisely across target intervals and retrieve two TTIRP that at the end provide direct and positive financial impact for the operator.