bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENGEMBANGAN VIDEO PEMBELAJARAN PADA MATA PELAJARAN BAHASA INGGRIS DENGAN PENDEKATAN PROBLEM BASED LEARNING MATERI GRAMMAR TO BE KELAS 7 SMP NEGERI 2 MUARA UYA
Authors: Yandi Mul , Salim Agus , Satrio Adrie 
Published: April 2024

Penelitian ini dilakukan dengan adanya permasalahan keterbatasan media pembelajaran disalah satu SMPN 2 Muara Uya. Penelitian ini bertujuan untuk : (1) mengembangkan video pembelajaran grammar to be dengan pendekatan problem based learning. (2) menguji hasil validitas video pembelajaran grammar to be untuk kelas 7 SMP. (3) mengetahui efektivitas video pembelajaran dalam proses pembelajaran siswa dengan pendekatan problem based learning. Penelitian ini menggunakan metode penelitian dan pengembangan (R&D), dan model pengembangan 4D. Teknik pengumpulan data dalam penelitian ini ialah observasi, wawancara, dan angket. Data yang dikumpulkan tersebut dilakukan dengan cara kualitatif dan kuantitatif deskriptif. Hasil penelitian sebagi berikut : (1) pengembangan video pembelajaran grammar to be melalui 4 tahapan model 4D meliputi : a) tahap pendefinisian, b) tahap perencanaan video pembelajaran, c) tahap pengembangan video pembelajaran, dan d) tahap penyebarluasan media pembelajaran. (2) kelayakan video pembelajaran grammar to be terdiri dari : ahli materi mata pelajaran berpredikat baik 75%, ahli media pembelajaran mendapatkan predikat sangat baik 89%, dan ahli naskah bahasa mendapatkan hasil baik 79%. (3) efektivitas penggunaan video pembelajaran terlihat dari perbedaan dalam penerapan media dengan pendekatan problem based learning terhadap hasil belajar siswa. Nilai rata-rata setelah menggunakan media 92%, lebih tinggi sebelum menggunakan media 58%. Dapat dikatakan bahwa video pembelajaran pada mata pelajaran bahasa inggris materi grammar to be dengan pendekatan problem based learning dapat meningkatkan hasil belajar siswa.
PEMANFAATAN MEDIA KAHOOT UNTUK MENINGKATKAN KERJASAMA DAN HASIL BELAJAR PADA MATA PELAJARAN IPS SISWA KELAS VIII DI SMPN 2
Authors: Salim Hidayat Nur , Arrum Dalu Zaudah Cyly , Utama Agus Hadi 
Published: April 2024

Penelitian ini adalah untuk melihat bagaimana pemanfaatan media kahoot yang sudah cukup familiar digunakan dalam proses belajar dan mengajar (PBM) di dalam kelas. Tujuan penelitian ini adalah untuk mengetahui pemanfaatan media kahoot dengan model kooperatif tipe STAD, kemudian untuk mengetahui bagaimana kerjasama siswa sebelum dan sesudah saat menggunakan media Kahoot dengan model kooperatif tipe STAD, yang pada akhirnya adalah untuk dapat mengetahui apakah ada peningkatan hasil belajar siswa setelah menggunakan media kahoot dengan model kooperatif tipe STAD. Penelitian ini mengambil sampel di kelas VIII pada mata pelajaran IPS SMPN 2 Kusan Hilir dengan menggunakan desain penelitian mixed method kuantitaif dan kualitatif. Instrumen dan analisis datanya meliputi lembar observasi pemanfaatan, lembar observasi kerjasama siswa, pedoman wawancara kerjasama siswa, dan tes hasil belajar siswa yang dianalisis secara kuantitatif dan kualitatif. Hasil penelitian ini memberikan gambaran bahwa pemanfaatan media kahoot pada PBM tiga kali pertemuan adalah 84,84% yang termasuk dalam kategori sangat baik. Kemudian hasil kerjasama siswa yang didapatkan sebelum tindakan sebesar 40%, sedangkan setelah tindakan pada pertemuan I adalah 63%, pada pertemuan II meningkat menjadi 80%, dan pada pertemuan III terus meningkat menjadi 93% yang termasuk dalam kategori baik. Hasil belajar menunjukkan telah terjadinya peningkatan 62,96% pada pertemuan I, 77,78% di pertemuan II, dan 96,56% di pertemuan III. Dengan demikian disimpulkan bahwa pemanfaatan media kahoot dengan model kooperatif tipe STAD dapat meningkatkan kerjasama dan hasil belajar siswa pada mata pelajaran IPS kelas VIII di SMPN 2 Kusan Hilir
A Rare Case: Stenosis Doudeni Congenital et Causa Ladd Band Eet Causa Malrotation with Situs Inversus in 12 Days Old Baby
Authors: Thaihutu Yhohan Ziantprayogi , Rifa’i Muhammad Syahibuddin 
Published: April 2024

We are sharing a rare presentation of congenital duodenal obstruction with combined intrinsic and extrinsic causes with situs inversus, namely, duodenal stenosis with gastrointestinal malrotation in a neonate. The patient underwent successful exploratory laparotomy, Ladd's procedure, and appendicectomy were carried out. Early recognition of signs and symptoms, prompt corrective surgery, and adequate optimization of metabolic components post-operatively are important to determine the decreased morbidity and mortality of neonates.
PROJECT-BASED LEARNING: MEMBIASAKAN TANGGUNG JAWAB DAN PRODUK KREATIF MAHASISWA PADA LINGKUNGAN LAHAN BASAH
Authors: Suyidno Suyidno , Mahtari Saidah , Astuti Yanti , Hadianti Raisa 
Published: April 2024

Pendidikan sains abad 21 bercirikan tanggung jawab kreatif individu untuk mencipta produk kreatif yang bermanfaat, namun kompetensi tersebut kurang dilatihkan dalam pembelajaran sains. Oleh karena itu, tujuan penelitian ini adalah menganalisis kelayakan buku Project-Based Learning (PjBL) untuk melatihkan produk kreatif dan tanggung jawab kreatif mahasiswa pada lingkungan lahan basah. Penelitian ini menggunakan desain 4D (define, design, develop, and disseminate). Pengumpulan data melalui uji validasi buku oleh 3 pakar pembelajaran sains dan 2 observasi mengamati aktivitas PjBL mahasiswa. Data yang diperoleh dianalisis secara deskriptif kualitatif. Hasil validasi pakar menunjukkan bahwa buku yang dikembangkan termasuk valid dari aspek format, bahasa, isi, maupun penyajiannya. Buku tersebut juga praktis karena mahasiswa mampu melaksanakan tanggung jawab kreatifnya pada setiap aktivitas PjBL dengan baik. Dengan demikian, buku PjBL ini adalah layak digunakan untuk melatihkan produk kreatif dan tanggung jawab kreatif mahasiswa pada lingkungan lahan basah.Kata kunci: Lingkungan Lahan Basah, Produk Kreatif, Project-Based Learning, Tanggung Jawab Kreatif. 21st-century science education is characterized by individual creative responsibility to create useful creative products, but these competencies are not sufficiently trained in science learning. Therefore, the purpose of this study was to analyze the feasibility of a Project-Based Learning book to train students in creative products and creative responsibilities in wetland environments. This research used the 4D design (Define, Design, Develop, Disseminate). Data collection through book validation test by 3 science learning experts and 2 observations observing student PjBL activities. The data obtained were analyzed descriptively and qualitatively. The results of expert validation showed that the book developed was valid from the aspects of format, language, content, and presentation. The book is also practical because students can carry out their creative responsibilities in each project activity well. Thus, this book is suitable to be used to train students on creative products and responsibilities in a wetland environment.Keywords: Creative Products, Creative Responsibility, Project-Based Learning, Wetland Environment.
PENGEMBANGAN TES DIAGNOSTIK FIVE-TIER UNTUK MENGIDENTIFIKASI MISKONSEPSI PESERTA DIDIK DALAM MATERI HIDROKARBON KELAS XI MIPA
Authors: Fajar Muhammad Rizky , Kusasi Muhammad , Almubarak Almubarak 
Published: April 2024

Telah dilakukan penelitian pengembangan instrument tes diagnostik five-tier model 4D pada materi hidrokarbon. Penelitiaan ini bertujuan untuk mengetahui kevalidan, kepraktisan dan keefektifan dalam pengembangan menggunakan instrumen tes diagnostik five-tier untuk untuk mengetahui tingkat miskonsepsi pada peserta didik materi hidrokarbon. Subjek penelitian adalah peserta didik kelas XI MIPA 2 SMAN 1 Sungai Tabuk dengan jumlah siswa 23 orang. Pengambilan sampel menggunakan teknik random sampling. Hasil penelitian menunjukkan (1) Terdapat empat konsep hidrokarbon yang memiliki persentase diatas 50% mengalami miskonsepsi konsep-konsep hidrokarbon tersebut iyalah pengelompokan hidrokarbon, tata nama hidrokarbon, sifat fisik hidrokarbon dan isomer. Dari tingkat kevalidan diperohel hasil sangat valid yang dipeoleh dari para ahli dan jawaban siswa yang diukur menggunakan SPSS. Kepraktisan diperoleh dari peserta didik yang mengisi angket dengan memberi skor 4 hingga 5 yang menandakan intrumen sudah dapat diterima dan diperkuat dengan wawancara kebeberapa peserta didik. Keefektifan diperoleh hasil dimana instrument sudah dinyatakan efektif karna sudah dapat mengukur tingkat pemahaman peserta didik dan diperkuat dengan hasil dari tingkat kesukaran, daya pembeda, reabilitas, dan validitas. Oleh karena itu, instrument tes diagnostik five-tier ini layak digunakan untuk mengukur dalam materi hidrokarbon.
RANCANG BANGUN MESIN PENGADUK PUPUK ORGANIK CAIR (POC)
Authors: Muttaqin Katiko Imamul , Nur Raybian 
Published: April 2024

Melalui kebijakan Pemerintah Indonesia dalam mencapai ketahanan pangan dalam negeri maka kegiatan dibidang pertanian dan perkebunan kembali dilirik oleh para peneliti untuk meningkatkan hasil produksi pertanian dan perkebunan. Beberapa upaya dalam mendukung peningkatan produksi pertanian dan perkebunan diantara yaitu menghasilkan sebuah alat yang membantu/mempermudah dalam proses kegiatan produksi. Penelitian ini bertujuan untuk merancang dan mengetahui performa dari sebuah mixer pengaduk pupuk organik cair (POC) yang nantinya akan digunakan di Desa Masingai II Kabupaten Tabalong oleh para kelompok tani. Pada penelitian ini menggunakan metode experimental pada mesin POC yang dibuat. Hasil penelitian menunjukkan mesin bekerja secara optimal dengan penggunaan daya 426 W yang menghasilkan putaran 66 rpm dengan konsumsi listrik sebesar 0,0007 kWh dengan kapasitas yang diaduk hingga 200 liter. Through the Indonesian Government's policy to create food security and improve farmers' welfare, researchers are looking at agricultural and plantation activities again to increase agricultural and plantation production. Some efforts to support increased agricultural and plantation production include producing a tool that helps/makes the production process easier. The purpose of this study is to design and calculate the performance of liquid organic fertilizer (POC) mixers which will later be used in Masingai II Village, Tabalong Regency by farmer groups. Experimental methods were used in the study. The research results show that the machine works optimally using 426 W of power which produces 66 rpm rotation with an electricity consumption of 0.0007 kWh every minute.
PENGARUH FRAKSI VOLUME DAN SUSUNAN SERAT KOMPOSIT POLYESTER-SERAT ECENG GONDOK TERHADAP NILAI KONDUKTIVITAS TERMAL
Authors: Akbar Saputera Muhammad Ilham , Subagyo Rachmat , Muchsin Muchsin 
Published: April 2024

Komposit dibuat dengan menggunakan resin poliester sebagai matriks dan serat eceng gondok sebagai penguat. Dari pengujian nilai konduktivitas yang dilakukan pada komposit serat eceng gondok diperoleh nilai konduktivitas termal tertinggi pada komposisi 15% serat-85% resin dengan variasi acak letak serat sebesar 0,063 W/m°C, disusul serat 20%- Lokasi serat acak resin 80% sebesar 0,060 W/m°C, kemudian disusul serat acak resin 25%-75% lokasi serat acak sebesar 0,050 W/m°C. Untuk komposisi resin 15% serat-85% dengan variasi letak serat sejajar diperoleh nilai sebesar 0,059 W/m°C, disusul resin 20% serat-80% dimana seratnya sebesar 0,056 W/m°C, disusul kemudian dengan 25% fiber-75% resin letak parallel fiber sebesar 0,043 W/m°C Pada pengujian struktur mikro terlihat bahwa semakin bervariasi fraksi volume maka semakin banyak void yang terdapat pada komposit. Nilai konduktivitas termal dan struktur mikro menjadikan komposit serat eceng gondok dapat menjadi referensi terkini sebagai bahan baku furniture atau bangunan yang cukup baik. Composites are made using polyester resin as a matrix and hyacinth fiber as reinforcement. From the testing of conductivity values carried out on the water hyacinth fiber composites obtained the highest thermal conductivity value in the composition of 15% fiber-85% resin with a variation of random fiber location of 0.063 W/moC, followed by 20% fiber-80% resin random fiber location of 0.060 W/m°C, then followed by 25% fiber-75% resin random fiber location of 0.050 W/m°C. For the composition of 15% fiber-85% resin with variations in the location of parallel fibers obtained a value of 0.059 W/m°C, followed by 20% fiber-80% resin where the fiber is equal to 0.056 W/m°C, then followed by 25% fiber-75% resin location parallel fiber of 0.043 W/m°C In testing the microstructure it can be seen that the more varied the volume fraction, the more void that is present in the composite. The value of thermal conductivity and microstructure makes the water hyacinth fiber composite can be the latest reference as a raw material for furniture or buildings that are quite good.
PENGARUH METODE PENDINGINAN MESIN SEPEDA MOTOR SUZUKI NEX TERHADAP KONSUMSI BAHAN BAKAR DAN EMISI GAS BUANG
Authors: Alexander Baimy , Al Banjari Muhammad Arsad 
Published: April 2024

Penelitian ini dimaksudkan untuk menilai dampak sistem pendinginan terhadap emisi gas buang dan penggunaan bahan bakar pada sepeda motor. Metode penelitian melibatkan pengujian eksperimen dengan tiga variasi pendinginan, yaitu penggunaan pendinginan normal, semburan udara, dan selimut air. Sepeda motor yang digunakan dalam pengujian adalah Suzuki Nex, dengan parameter RPM diatur pada 3000, 4500, dan 7000, dan penggunaan bahan bakar sejumlah 100 ml selama periode 2 menit. Untuk mengukur emisi gas buang, termasuk CO, CO2, HC, dan O2, digunakan Gas Analyzer, sementara gelas ukur digunakan untuk mengukur sisa bahan bakar yang terpakai. Hasil pengujian menunjukkan bahwa sistem pendinginan normal memberikan efisiensi konsumsi bahan bakar yang lebih baik jika dibandingkan dengan metode lainnya. Meskipun demikian, sistem pendinginan selimut air dapat mengurangi emisi CO dan HC pada RPM yang tinggi. Sebaliknya, pada RPM yang tinggi, sistem pendinginan semburan udara menunjukkan peningkatan emisi CO dan HC, mengindikasikan efisiensi yang lebih rendah dalam kondisi tersebut. Penelitian ini memberikan pemahaman yang lebih mendalam tentang dampak sistem pendinginan terhadap emisi gas buang dan penggunaan bahan bakar pada sepeda motor. This research is intended to assess the impact of the cooling system on exhaust gas emissions and fuel usage in motorcycles. The research methodology involves experimental testing with three cooling variations: normal cooling, air injection, and water jacket. The motorcycle used in the testing is the Suzuki Nex, with RPM parameters set at 3000, 4500, and 7000, and fuel usage of 100ml over a 2-minute period. A Gas Analyzer is employed to measure exhaust gas emissions, including CO, CO2, HC, and O2, while a measuring cup is used to gauge the remaining fuel. The test results indicate that the normal cooling system provides better fuel consumption efficiency compared to other methods. However, the water jacket cooling system can reduce CO and HC emissions at high RPMs. Conversely, at high RPMs, the air injection cooling system shows an increase in CO and HC emissions, indicating lower efficiency in those conditions. This research provides a deeper understanding of the impact of the cooling system on exhaust gas emissions and fuel usage in motorcycles.
Evaluation of Multi-Cluster Fracturing Placement with Multi-Arm Caliper
Authors: Li H. , Kalinin D. , Bruce A. , Bukovac T. , Kurniadi S.D. 
Published: April 2024

Abstract
With the increasing application of horizontal well drilling, multistage hydraulic fracturing has become widespread in unconventional resources. The production data often reveal that the production contribution of each cluster is highly non-uniform, indicating a corresponding inconsistency in fluid and proppant distribution. Understanding the distribution is crucial to completion designs aiming for a more even cluster contribution. In our study, we developed a new approach for evaluating the distribution of fracturing materials using multi-arm caliper data.
Most perforations are performed perpendicular to the casing, and perforation holes are eroded as fracturing fluid flows through them. Because casing fluid flow is unidirectional, the erosion is asymmetric. Modern multi-arm caliper tools exhibit enough resolution to accurately resolve casing inside-diameter profiles. Our systematic workflow, perforation asymmetry analysis (PAA), assesses erosion and correlates it with material distribution. First, the peak in the inside-diameter profile representing a perforation hole is identified. Subsequent analysis of the profile’s asymmetry indicates the degree of erosion. Based on the analysis of individual perforation holes, the material entry for a cluster and the material distribution among clusters are modeled.
Well C-2H, drilled in the Beetaloo sub-basin, Northern Territory, Australia, was stimulated with 21 hydraulic fracturing stages using the plug-and-perf technique. After well cleanup, a 24-arm caliper was run in the hole with the objective of understanding casing ovality after stimulation. The analysis encompassed different combinations of cluster numbers, perforation holes, treating fluids, and pumping rates. The results helped to iterate the completion and treatment design for an upcoming well.
This new method can evaluate perforation hole erosion due to fracturing materials, which can be subsequently translated into insights about fracturing placement distribution. Compared with other measurements, this is an indirect method but exhibits good data availability and cost-effectiveness. Initially, it can be used and evaluated together with other solutions as a step toward subsequent precise standalone analysis.
Low-Carbon Oil Using Dimethyl Ether (DME) Produced from Green Hydrogen and Captured CO2
Authors: Farajzadeh R. , Khoshnevis N. , Solomon D. , Masalmeh S. , Bruining J. 
Published: April 2024

Abstract
Hydrocarbon fuels are widely recognized as significant contributors to climate change and the rising levels of CO2 in the atmosphere. As a result, it is crucial to reduce the net carbon intensity of energy derived from these fuels. This study explores the feasibility of using dimethyl ether (DME), produced through the hydrogenation of CO2, as a low-carbon method for generating electricity from hydrocarbon fuels. The proposed approach involves capturing the emitted CO2 during combustion and utilizing it to produce the necessary DME in a closed cycle. It is shown that for a mature reservoir in the Middle East, this method can mitigate approximately 75% of the CO2 emissions released from burning the produced oil. By incorporating zero-carbon electricity throughout the process, the total abatement of CO2 can reach 85%. Furthermore, the study highlights the importance of improving the DME utilization factor (bbl-oil/tDME). By optimizing this factor, high abatement rates can be achieved. However, it is important to note that implementing this method comes with a high exergetic cost. During a certain period in the field’s lifetime, the invested energy exceeds the energy produced. The stages with the highest exergy consumption are CO2 capture and hydrogen production.
Re-Associated Polymer Particle Gels by In-Situ Nanosilica Gels for Water Shutoff Applications in Fractured Reservoirs
Authors: Almohsin Ayman , AlMutairi Saad , Alharbi Bader , Al-ShaikhAli Anaam 
Published: April 2024

Abstract
Re-association of preformed particle gel via colloidal nanosilica is an innovative kind of preformed particle gel of which particles can bond together to form a reinforced bulk gel system after being placed in a fractured having unwanted water production. The objective is to minimize water production of the oil wells by treating the non-productive conductive paths, mainly referred to as reservoir heterogeneity having natural or induced fracture which is connected to water aquifer.
The ultimate objective of this research is to evaluate the newly developed systems for water shutoff application in fractured reservoir, using different testing methodologies. Thermogravimetric Analysis (TGA) and dynamic mechanical analysis were conducted to benchmark performed particle gels swelled in water and nanosilica/activator. In addition, curing time (re-association) must be defined to allow safe pumping operation of the fluid through the tubular and into the target zone; therefore, the re-association (gelation time) of the particle gels were investigated. A coreflooding test was carried-out to evaluate the plugging efficiency of the newly developed technology using an induced fractured core plugs.
TGA thermograms of polymer particle gels swellen in water and Nanosilica revealed that the semi-quantitative result indicated that the total weight losses (TWL) of the samples are approximately 47wt.% and 18 wt.%, respectively, while the residual masses are found to be approximately 53 wt.% and 82 wt.%, respectively. Furthermore, the results obtained from dynamic mechanical analysis, the storage modulus (G') was much higher with particle gels swelled in in-situ nanosilica than swelled in water, the newly developed composite gels behave more solid-like material. Additionally, the (re-association of the particle gels) curing time can be controlled by adjusting activator concentration from minutes to hours, which allows a predictable and controllable pumping time. The core flooding findings unveiled that this robust newly developed material efficiently plugged the facture core with high pressure of 2000 psi.
Evolving technologies are required in the oil industry to overcome the existent challenges. Re-association of preformed particle gel via In-situ nanosilica is a novel method to procedure a robust bulk gel system for water control from fractured reservoirs.
Nitrogen Huff and Puff: Novel Method for Enhancing Liquid Production in the Brown Fields of the Mehsana
Authors: Meena M. , Chanchlani K. , Kumar A. , Chouhan V. 
Published: April 2024

Abstract
Nitrogen cyclic stimulation is a three-stage process, which involves nitrogen injection, soaking, and production for a well. Due to low solubility and dissolution, large amount of nitrogen remains as free gas at high pressure during injection phase. In production phase, oil production rate is high due to various recovery drive mechanisms. The paper will discuss in detail about the changes taking place in the injected nitrogen and reservoir fluid. It will also bring out the challenges faced in implementing this novel technology. The breakthrough cases are discussed with the probable recovery mechanism.
Nitrogen Soaking time is increased to reduce the pressure depletion at the early stage of each cycle. Oil recovery is enhanced by taking advantage of gas cap, gravity differentiation and free gas to oil production. The pressure depletion can be increased at the later stage of each cycle to take full advantage of the solution gas drive and to form a stable foamy oil flow. Nitrogen is more suitable for early application of the cyclic stimulation process. It not only has low cost and good recovery efficiency but can also keep high gas oil contact. Results are quite encouraging for heavy oil fields as compared to light oil fields. This method can be potential choice to the operators for increasing oil production with minimum water cut.
Nitrogen cyclic stimulation is highly efficient techno-economic process. The Asset has realized cumulative gain of 14501 m3 in 52 production wells with reduction in average water cut from 92% to 58% and cumulative nitrogen injection of 2730 KL. The parent company is maintaining the ratio of oil produced to nitrogen injected at 5.3, indicating higher oil gain with the minimum quantity of the nitrogen injected. The Asset is planning to implement this technology at wide scale.