bluuebunny/crossref_metadata_2025_split huggingface dataset:
Validity of Multimedia Peat Swamp Forest Concept Based on Problem Solving to Practice Critical Thinking Skills of Chemistry Students
Authors: Agustina Betty , Biyatmoko Danang , Putra Aminuddin Prahatama 
Published: September 2020

The wetland learning system is still conventional and lecturer-centered so that students are not accustomed to doing problem solving activities that have an impact on the lack of students' critical thinking skills. This study aims to develop multimedia learning of problem solving based peat swamp forest concepts to determine the validity of multimedia to train students' critical thinking skills. The stages carried out following the ADDIE instructional design flow include analysis, design, development, implementation and evaluation. Data collection techniques used a validation sheet instrument for two material experts from Lambung Mangkurat University and one multimedia expert from Politeknik Hasnur. Readability test was conducted on three active students who had taken a course to introduce the wetland environment in FMIPA ULM. The results showed that the multimedia learning concept of problem solving peat swamp forest to train critical thinking skills of chemistry students of FMIPA ULM Banjarbaru is very valid.AbstrakSistem pembelajaran lahan basah masih bersifat konvensional dan berpusat pada dosen sehingga mahasiswa tidak terbiasa melakukan kegiatan pemecahan masalah yang berdampak pada kurangnya keterampilan berpikir kritis mahasiswa. Penelitian ini bertujuan untuk mengembangkan multimedia pembelajaran konsep hutan rawa gambut berbasis problem solving untuk mengetahui bagaimana validitas multimedia untuk melatihkan keterampilan berpikir kritis mahasiswa. Tahapan yang dilakukan mengikuti alur desain instruksional ADDIE meliputi analisis, desain, pengembangan, implementasi dan evaluasi. Teknik pengumpulan data menggunakan instrumen lembar validasi terhadap dua ahli materi dari Universitas Lambung Mangkurat dan satu ahli multimedia dari Politeknik Hasnur. Uji keterbacaan dilakukan terhadap tiga mahasiswa aktif yang pernah mengambil mata kuliah pengenalan lingkungan lahan basah di FMIPA ULM. Hasil penelitian menunjukkan bahwa multimedia pembelajaran konsep hutan rawa gambut berbasis problem solving untuk melatihkan keterampilan berpikir kritis mahasiswa kimia FMIPA ULM Banjarbaru sangat valid.
ANALISIS HEAT TRANSFER COEFFICIENT SEBELUM DAN SESUDAH OVERHAUL PADA ECONOMIZER BOILER DI PT. JAPFA COMFEED BANJARMASIN
Authors: Ramlan Muhammad , Mursadin Aqli 
Published: September 2020

In some heat exchanger tools are widely used in industries such as power plants, oil refineries, chemical plants and petrochemicals, natural gas industry, refrigeration, and so forth. One example of a heat exchanger found in the poultry feed industry in PT.Japfa Comfeed Branch of Banjarmasin is the economizer, where the hot vapor of combustion in the furnace is used as a feed water heater before entering the boiler. From the results of the study known in the economize coefficient of the highest heat transfer before the overhaul of 1.393.1 Btu / jam.ft2.oF at 92.5 oC, and the lowest heat transfer coefficient before the overhaul of 1,334.8 Btu / jam.ft2. oF at 101 ° C. after the overhaul, it is known that the highest economizer heat transfer coefficient is 1,419.7 Btu / hour.ft2.oF at 99oC, and the lowest heat transfer coefficient after the overhaul is 1,378.6 Btu / hr.ft2.oF at 104.5 oC. The increase in heat transfer coefficient value after overhaul is 6.4% of the heat transfer coefficient before overhaul. Keywords: Economizer, Boiler, Heat Transfer Coefficient
CATALYTIC CONVERTER BERBAHAN GIPSUM DENGAN CAMPURAN SERBUK TEMBAGA TERHADAP EMISI GAS BUANG
Authors: Aditya Trisna , Ghofur Abdul 
Published: September 2020

The purpose of this study is to find out the use of Gypsum-based Catalytic Converter and a mixture of Copper Powder Against Exhaust Gas Emissions and Engine Performance. This study uses an experimental method, the population in this study was Suzuki Satria FU motorcycle in 2009, the data of this study were numbers that showed the exhaust gas content of CO, HC. This research was carried out in the Banjarmasin environment office using a gas analyzer and was also carried out in the Banjarmasin plug and play workshop by using a dynamometer. The technique used in data collection was the variation in rpm and number of compositions. From experiments with three different compositions, the following results were obtained: (1) The results of this study are: the form of Catalytic Converter with composition C, the level of HC emission reduction is maximum of 78,91%, the level of CO emission reduction is 82,96%. The form of Catalytic Converter with plate variation 6 (six), the maximum level of CO2 emission reduction is 29,56%, the level of CO emission reduction is 49,32%, and the level of HC emission reduction is 82,92%. (2) Using a Catalytic Converter produces a power of 10,29 Hp and a Torque of 10,35 Nm. Keywords: Catalytic Converter, Emission, Gypsum, Muffler, Concentration
ANALISA KEGAGALAN KOMPONEN DRIVE PINION GEAR PADA SWING MOTOR EXCAVATOR CATERPILLAR 349D
Authors: Fatkurocman Andi , Samlawi Ach. Kusairi 
Published: September 2020

Penelitian ini bertujuan untuk mengetahui alasan fraktur yang terjadi pada drive pinion gear unit motor swing Excavator Caterpillar 349 d. Dalam penelitian ini dilakukan beberapa tahapan yaitu pengamatan visual dan pengamatan makro, pengujian komposisi struktur logam, dan pemodelan load and latch menggunakan Autodesk Inventor 2014 sebelum mendapatkan hasil akhir. Hasil yang diperoleh dari penelitian ini adalah bahwa ada kurangnya presisi antara pinion drive dan planetary gear karena pin planet yang tidak dapat berfungsi sebagai pemegang planetary gear sehingga rotasi planet rentan terhadap tabrakan sebagai pemicu yang mengakibatkan cacat. Pada proses analisis tegangan menggunakan software autodesk inventor 2014 versi mahasiswa, hasil analisis nilai von misses adalah 9,798 Mpa jauh lebih kecil dari batas elastisitas material 790 MPa sehingga faktor pembebanan tidak menyebabkan sebuah kesalahan. This research is purpose to knowing the reason of the fracture that happen in drive pinion gear of the swing motor unit Excavator Caterpillar 349 d. In this research is doing by several stage it is visual observation and macro observation, testing of metal structure composition, and load and latch modeling using Autodesk Inventor 2014 before getting the final result. The results obtained from this study are that there is a lack of precision between drive pinion gear and planetary gear due to planetary pins that cannot function as planetary gear holders so that planetary rotations are prone to hilarious triggering collisions resulting in defects. In the process of stress analysis using the student version of autodesk inventor 2014 software, the results of the analysis of the value of von misses is 9.798 Mpa are much smaller than the limit of material elasticity of 790 MPa so that the loading factor does not cause a fault.
ANALISA PERPINDAHAN PANAS COOLING TOWER (INDUCED DRAFT) PLTU I PULANG PISAU (2 x 60 MW)
Authors: Sastrawan I Komang Gede , Subagyo Rachmat 
Published: September 2020

Penelitian ini bertujuan untuk mengetahui perpindahan panas dan kinerja menara pendingin Pembangkit Listrik Pulang Pisau I (2 x 60 MW) dengan membandingkan data hasil yang diperoleh selama komisioning dan 2018. Pembangkit Listrik Pulang Pisau I (2 x 60 MW) merupakan pembangkit listrik. menggunakan sistem pendingin tertutup dengan menara pendingin. Menara pendingin pada suatu pembangkit listrik memiliki peran yang sangat penting, sebagai media pendingin utama untuk menjaga kestabilan suhu kondensor. Cooling tower merupakan salah satu peralatan perpindahan panas pada suatu pembangkit listrik. Di Pembangkit Listrik Pulang Pisau I (2 x 60 MW), kinerja menara pendingin perlu dikaji dan dianalisis bagaimana perpindahan panas dan efisiensinya untuk mendapatkan masukan guna meningkatkan / mempertahankan kinerja menara pendingin. Laju perpindahan panas tertinggi dari Pulang Pisau - PLTU Daya I 2 x 60 MW menara pendingin terjadi pada tanggal 2 Desember 2018 pukul 06.00 WIB, beban 51,0 MW yaitu 6.883 kW dan terendah terjadi pada tanggal 24 November 2018 pukul 15.00 WIB. , 14,6 MW yang merupakan 2,752 kW. Nilai efisiensi rata-rata 71%. The study aims to determine the heat transfer and performance of cooling tower Pulang Pisau I Power Plant (2 x 60 MW) by comparing the result data obtained during commissioning and 2018. Pulang Pisau I Power Plant (2 x 60 MW) is a power plant using a closed cooling system with the cooling tower. Cooling tower in a power plant have a very important role, as the main cooling media to keep the condenser temperature stable. Cooling tower is one of the heat transfer equipment in a power plant. In Pulang Pisau I Power Plant (2 x 60 MW), cooling tower performance needs to be examined and analyzed how heat transfer and efficiency are to get some input to improve / maintain the performance of the cooling tower. The highest rate of heat transfer from Pulang Pisau - Daya PLTU I 2 x 60 MW cooling tower occurred on December 2nd, 2018 at 06.00 WIB, a load of 51.0 MW which was 6.883 kW and the lowest occurred on November 24th, 2018 at 15.00 WIB, 14.6 MW which was 2.752 kW. Average efficiency value of 71%.
Pengaruh Perlakuan Preheat Partikel Al2o3 Pada Proses Stir Casting terhadap Sifat Fisik dan Mekanik Komposit Al6061- Al2O3
Authors: Surojo Eko , Wibowo Henri Fatih , Triyono Teguh , Suprihanto Agus 
Published: September 2020

<div class="WordSection1"><div class="WordSection1"><p>Aluminium komposit secara luas digunakan untuk aplikasi kinerja tinggi seperti di otomotif, militer dan kedirgantaraan. <em>Stir casting</em> merupakan salah satu metode yang digunakan untuk memproduksi AMC (<em>Aluminium Matrix Composite</em>). Parameter dalam metode <em>stir casting</em> yang harus dipertimbangkan ketika proses manufaktur diantaranya adalah temperatur pengadukan, kecepatan pengadukan dan perlakuan pada partikel penguat karena akan berpengaruh terhadap sifat fisik dan mekanik komposit. Penelitian ini dilakukan untuk mengetahui pengaruh pemanasan awal serbuk Al<sub>2</sub>O<sub>3 </sub>terhadap porositas, kekerasan, laju keausan spesifik dan koefisien gesekan komposit Al6061-Al<sub>2</sub>O<sub>3</sub>. Proses manufaktur komposit dilakukan pada temperatur pengadukan 720-740°C, kecepatan pengadukan 600 rpm dan variasi perlakuan <em>preheat </em>pada partikel penguat Al<sub>2</sub>O<sub>3</sub> dengan suhu ruang, 150℃ dan 300℃. Hasil penelitian menunjukkan bahwa perlakuan <em>preheat</em> pada partikel penguat Al<sub>2</sub>O<sub>3</sub> berpengaruh terhadap porositas, kekerasan, laju keausan spesifik dan koefisien gesek komposit. Perlakuan <em>preheat </em>pada partikel penguat Al<sub>2</sub>O<sub>3</sub><em> </em>mampu menurunkan porositas, meningkatkan kekerasan dan koefisien gesek, serta menurunkan laju keausan spesifik komposit. Pemberian perlakuan <em>preheat</em> yang optimal didapat pada suhu 300℃.</p></div></div>
Comments: Adapting and Advancing
Authors: Boschee Pam 
Published: September 2020

For the past 6 months, you have read, watched, and heard about adaptation in personal lives and businesses and many of you have experienced it firsthand to some degree - ranging from minor to life-changing events.
SPE recognizes that as our members adapt, so too must our ability to continue to serve members and advance our mission “to collect, disseminate, and exchange technical knowledge concerning the exploration, development, and production of oil and gas resources and related technologies for the public benefit and to provide opportunities for professionals to enhance their technical and professional competence.”
Ramping up technical knowledge and professional competence is in many ways more important now than ever. Yes, it has always been important to our members to stay updated in advances in technology and in the innovative use of existing technologies. Today, as the oil and gas industry - down-, mid- and upstream - changes and will be changed, members in all disciplines seek unbiased professional resources that are high quality and trustworthy. Staying current and relevant within an adapting and advancing industry is challenging but critical.
SPE quickly pivoted to virtual delivery of technical knowledge. Among the offerings were the SPE Live broadcasts on LinkedIn, the first of which was streamed on 7 April. Join a live session by visiting www.spe.org/events/live-events/ to learn about upcoming events and find the on-demand broadcasts. The event formats range from 1-on-1 interviews with subject matter experts to moderated panel discussions.
The SPE Podcast (www.spe.org/podcasts/) also offers a variety of topics presented as interviews with industry experts about technical subjects and career advice. New SPE podcasts are released every 1 to 2 weeks.
SPE Webinars (https://webevents.spe.org/) are another means of staying in the know and expanding your technical knowledge in all technical disciplines.
Although global oil and gas production has been reduced, onshore and offshore upstream operations and production continue. The JPT editors are committed to providing technical information that is useful to our members in their work. Our feature articles and technical paper synopses focus on topics from all disciplines, from both “boots on the ground” and forward-looking views. Our news briefs and in-depth articles online and in the magazine also provide insights about the business of oil and gas - which has been a moving target over the past few months.
SPE events remain an important means of advancing your technical knowledge and staying connected within the industry. A member shared this comment about an advantage of virtual events: the opportunity to “attend” an event that would not have been possible due to time and budget constraints.
Technology Focus: Reservoir Performance (September 2020)
Authors: Livescu Silviu 
Published: September 2020

2020 is going to be remembered in oil and gas history for its unexpected free fall in oil prices in less than 2 months. This year’s severe supply-and-demand imbalance is going to have tremendous implications for adopting new business models, developing new technologies, and attracting new talent into the industry. Collaboration and automation are going to continue being drivers for both operators and services providers in all their business segments. While the ongoing trends in data science and engineering analytics are going to show more benefits in lowering production costs and increasing efficiencies, the well-established reservoir and production engineering disciplines will continue to be critical for reservoir performance improvements.
In the past 12 months, 93 technical papers were presented at various conferences with a reservoir performance focus and were reviewed for this feature, showcasing further advances in reservoir performance monitoring and optimization. For comparison, 133, 157, and 160 technical papers were reviewed for the 2019, 2018 and 2017 features, respectively. Interestingly, this year, 34 papers had first authors from academia (37%), 49 had first authors from operating companies (53%), and 10 had first authors from oilfield services companies and consulting firms (11%). For comparison, the review for the 2019 feature included 39 papers with first authors from academia (29%), 63 with first authors from operating companies (47%), and 31 with first authors from oilfield services companies and consulting firms (23%). It will be interesting to see this data for the 2021 feature.
The three primary papers selected and three alternative papers recommended as additional reading are a representative sample of the 93 papers reviewed for this feature. They have been selected on the basis of their technical contributions and geographic diversity.
Downhole System Enables Real-Time Reservoir-Fluid-Distribution Mapping
Authors: Feder Judy 
Published: September 2020

This article, written by JPT Technology Editor Judy Feder, contains highlights of paper IPTC 19807, “A New Downhole System for Real-Time Reservoir-Fluid-Distribution Mapping: E-REMM, the Eni Reservoir Electromagnetic Mapping System,” by Franco Bottazzi, Paolo Dell’Aversana, and Claudio Molaschi, SPE, Eni, et al., prepared for the 2020 International Petroleum Technology Conference, Dhahran, Saudi Arabia, 13-15 January. The paper has not been peer reviewed. Copyright 2020 International Petroleum Technology Conference. Reproduced by permission.
This paper presents the basic concepts and architecture of the Eni Reservoir Electromagnetic Mapping (E-REMM) borehole electromagnetic (EM) mapping system that integrates borehole EM methodology with surface EM methods to provide real-time mapping of reservoir-fluid distribution during production or injection. By helping well teams know how distribution of hydrocarbons and water changes over time and space, the system addresses a fundamental requirement for managing the reservoir to maximize the recovery factor, optimize production, and reduce associated costs.
Introduction
Several approaches are currently used to map hydrocarbons and other fluids in the reservoir in real time with variable sensitivity, differences in effectiveness, and a wide range of costs. Among the various approaches, EM and electric methods show a high benefit-to-cost ratio and a high sensitivity to the resistivity contrast between oil-saturated and brine-saturated reservoir rocks. These methods can estimate variations in fluid properties at reservoir depth in a distance range of hundreds of meters, although the spatial resolution decreases significantly with the distance between sources and receivers. Furthermore, combining multiple layouts in boreholes and at surface can improve the effectiveness of EM and electric methods significantly while increasing their spatial resolution.
The integrated system discussed in the complete paper allows multiscale EM prospecting and deep investigation in a large 3D volume of rocks between multiple wells and surface.
Compositional Simulation, Artificial Intelligence Optimize Water Injection
Authors: Carpenter Chris 
Published: September 2020

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 198995, “Low-Salinity Water-Injection Optimization in the Namorado Field Using Compositional Simulation and Artificial Intelligence,” by Diana Mercado Sierra, SPE, Argenis Alvarez Rojas, and Victor Salazar Araque, Computer Modelling Group, prepared for the 2020 SPE Latin American and Caribbean Petroleum Engineering Conference, 27-31 July, Virtual. This paper has not been peer reviewed.
The complete paper discusses optimization of a development plan involving low-salinity water injection (LSWI). This methodology combines compositional simulation and a mathematical optimization tool that uses artificial intelligence to maximize the net present value (NPV) of the project under evaluation. The adapted methodology allowed an optimal development plan, considering the uncertainty associated in the reservoir, by use of multiple geostatistical realizations and simultaneous history-matched models.
LSWI
LSWI is an enhanced-oil-recovery technique in which the salinity of the injected water is controlled with the objective of increasing the recovery factor. Of the mechanisms proposed for LSWI, wettability alteration is the most widely accepted for describing the increase of the recovery factor. The wettability change in reservoirs with the presence of sand-stones mainly is attributed to the multionic exchange between the injected fluid and the clay surface, as is the double layer expansion. From a technical point of view, the LSWI success is related strongly to reservoir lithology.
An integrated analysis and optimization study was performed using numerical simulation to evaluate LSWI as an alternative for increasing the recovery factor in the Namorado field in the Campos Basin of Brazil.
Johan Sverdrup’s Digital Operations Drive Efficiency, Safety
Authors: Carpenter Chris 
Published: September 2020

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 30477, “Johan Sverdrup: The Digital Flagship,” by Paal Frode Larsen, Tor Tønnessen, and Florian Schuchert, Equinor, et al., prepared for the 2020 Offshore Technology Conference, originally scheduled to be held in Houston, 4-7 May. The paper has not been peer reviewed. Copyright 2020 Offshore Technology Conference. Reproduced by permission.
The sheer size of the Johan Sverdrup field development (expected recoverable reserves of 2.7 billion bbl, with projected operations of more than 50 years) has earned it designation as the operator’s digital flagship. The field has driven digital solutions and work flows that have the potential to be scaled up for the benefit of the operator’s entire portfolio. The complete paper describes the development of the “digital field worker” at Johan Sverdrup, an initiative that has changed the approach toward not only construction and completion but also operations.
Introduction
The field is approximately 150 km west of Stavanger in the North Sea in a water depth of 110-120 m (Fig. 1). The top reservoir is approximately 1800 m below mean sea level. The reservoir is characterized by hydrostatic pressure and undersaturated oil with a low gas/oil ratio. A predrilling campaign included eight oil producers and 12 injectors. Additional wells will be drilled to achieve the expected Phase 1 oil production capacity of 70,000 m3/d.
The field has been developed in two phases. Phase 1 was approved by Norwegian authorities in 2015 and includes four bridge-linked platforms, all with jacket substructures. Primary power to the field is supplied from shore. The full field development includes 64 wells, both platform and subsea wells. The field came onstream in October 2019. Ramp-up of the predrilled wells proceeded smoothly to a field-production level of approximately 350,000 B/D. Phase 2 of the development was approved in 2019 and is expected to start production in Q4 2022.
At peak, this field will account for approximately one-third of all oil production in Norway with record low emissions. The expected full-field (Phase 1 and 2) production capacity is 105,000 m3/d at peak. Breakeven price for the full-field development is less than $20/bbl.