bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pengaruh Model Pembelajaran Problem Based Learning (PBL) Terhadap Kemampuan Berpikir Kritis Matematis Siswa pada Materi Sistem Persamaan Linear Dua Variabel
Authors: Nufus Hayatun , Herizal Herizal , Sahputri Linda Dewi 
Published: August 2021

Matematika merupakan pelajaran wajib yang sudah diajarkan semenjak dasar hingga menengah, matematika dapat melatih dan mengembangkan kemampuan berpikir siswa. Namun, banyak siswa yang menganggap matematika adalah mata pelajaran yang sulit dipahami. Siswa cenderung menghindari bahkan takut untuk belajar matematika, sehingga menyebabkan rendahnya kemampuan berpikir kritis matematis siswa. Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran Problem Based Learning (PBL) terhadap kemampuan berpikir kritis matematis siswa. Penelitian ini menggunakan pendekatan kuantitatif dengan jenis penelitian Quasi Eksperimental Design dan rancangan penelitianThe Non equivalent Postets-Only Control Grup Design.Populasidalampenelitian ini adalah kelas VIII SMP Negeri 4 Dewantara, sementara sampelnya yaitu kelas VIII2dan VIII3dengan teknik pengambilan sampel adalah Purposive Sampling. Adapun Teknik pengumpulandatayangdigunakandalam penelitianini adalah tes kemampuanberpikirkritis matematis siswa. Analisis data yang dilakukan untuk tes kemampuan berpikir kritis matematis menggunakan uji-t karena data berdistribusi normal dan homogen. Dari hasil uji hipotesis didapatkan nilai signifikan 0,001 yang artinya tolak Ho sehingga dapat disimpulkan bahwa dengan menggunakan model pembelajaran Problem Based Learning (PBL) berpengaruh pada kemampuan berpikir kritis matematissiswa.Mathematics is a compulsory subject that has been taught from elementary to middle school, mathematics can train and develop students' thinking skills. However, many students consider mathematics to be a difficult subject to understand. Students tend to avoid and even fear learning mathematics, resulting in low students' mathematical critical thinking skills. This study aims to determine the effect of the Problem Based Learning (PBL) learning model on student's mathematical critical thinking skills. This research uses a quantitative approach with the type of research Quasi Experimental Design and the research design of The Nonequivalent Postets-Only Control Group Design. The population in this study was class VIII SMP Negeri 4 Dewantara, while the sample was class VIII2 and VIII3 with the sampling technique using purposive sampling. The data collection technique used in this study was a test of students' mathematical critical thinking skills. The data analysis conducted for the test of mathematical critical thinking skills used the t-test because the data were normally distributed and homogeneous. From the results of the hypothesis test, it was obtained a significant value of 0.001, which means reject Ho, so it can be concluded that using the Problem Based Learning (PBL) learning model has an effect on students' mathematical critical thinking skills.
Pengaruh Model Pembelajaran Numbered Head Together (NHT) Terhadap Peningkatan Kemampuan Pemahaman Konsep Berbantuan Software
Authors: Nasution Zulaini Masruro 
Published: August 2021

Penelitian ini bertujuan untuk mengetahui ada tidaknya pengaruh model pembelajaran Numbered Head Together terhadap kemampuan pemahaman konsep siswa kelas X SMK Teladan Pematangsiantar tahun 2020 sebelum diberi perlakuan (pretes) dan sesudah diberi perlakuan (postes) pada kelas eksperimen. Penelitian ini merupakan penelitian eksperimen semu.Populasi dalam penelitian ini adalah seluruh kelas X SMK Teladan Pematangsiantar yang berjumlah 74 orang.Sedangkan sampel yang digunakan pada penelitian ini berjumlah 37 orang.Sampel penelitian ditentukan dengan teknik simple random sampling.Pengumpulan data dengan menggunakan teskemampuan pemahaman konsep dengan soal uraian berjumlah 5 butir. Data di analisis menggunakan uji normalitas dan ujihi potesis yaitu paired simples t-test .Hasil penelitian menunjukkan bahwa terdapat pengaruh model pembelajaran Numbered Head Together terhadap kemampuan pemahaman konsep siswa dari uji pretes dan postes yang diberikan pada siswa kelas X SMK Teladan Pematangsiantar. Rata-rata nilai posttest adalah 44,67 lebih tinggi dari nilai pretest 18,56 dan presentase kenaikannya adalah 13%. Adanya perbedaan yang signifikan menunjukkan bahwa pembelajaran menggunakan model pembelajaran Numbered Head Together berpengaruh positif terhadap kemampuan pemahaman konsep siswa.This study aims to determine whether there is influence of the model of learning Numbered Head Together on the ability to understand the concept of class X students of SMK Teladan Pematangsiantar in the 2020 lesson years before being treated (pretested) and after being treated (postes) in the experimental class. This research is a quasi-experimental research. The population in this study is the entire class X students of SMK Teladan Pematangsiantar which amounted to 74 people. While the sample used in this study amounted to 37 people. The sample is determined by simple random sampling technique. Data collection by using concept comprehension comprehension test with 5 item description. Data were analyzed using normality test and hypothesis test that paired simples t-test. The result of the research shows that there is influence of the Numbered Head Together learning model to the students' concept of pretest and post test which is given to the students of grade X students of SMK Teladan Pematangsiantar. The average posttest score is 44.67 higher than the pretest value of 18.56 and the percentage increase is 13%. The existence of significant differences indicate that the learning using the model of learning Numbered Head Together have a positive effect on students' concept of understanding ability.
Analisa Variasi Nilai Konstanta Komponen Harmonik Tahunan Metode Admiralty dengan Prediksi Elevasi Pasang Surut di Sendang Biru Malang
Authors: Tambunan Russel , Pranowo Widodo S. , Adrianto Dian 
Published: August 2021

Metode admiralty merupakan metode pengolahan data pengamatan pasang surut yang dapat digunakan pada rentang waktu pengamatan selama 15 hari atau 29 hari dan menghasilkan 9 komponen pasang surut dan mempresentasikan jenis pasang surut yang terjadi pada suatu lokasi yaitu diurnal K1, P1 dan O1, semi-diurnal M2, K2, S2 dan N2, kuarter-diurnal M4 dan MS4. Penentuan konstanta harmonik pasang surut pada suatu Perairan dengan menggunakan metode admiralty akan menghasilkan variasi nilai dan jumlah konstanta komponen harmonik yang berbeda pada setiap Bulan dalam satu tahun dan berpengaruh pada prediksi elevasi pasang surut.
Pada pengolahan data pengamatan yang dilaksanakan di Perairan Sendang Biru Malang dengan metode admiralty pada setiap Bulan pada tahun 2020 diperoleh variasi nilai konstanta harmonik yang cukup signifikan dan mempengaruhi hasil data prediksi. Nilai Root Mean Square Error maksimum terjadi pada data prediksi hasil pengolahan konstanta komponen harmonik Bulan Oktober dan nilai Root Mean Square Error minimum terjadi pada data prediksi hasil pengolahan konstanta komponen harmonik Bulan Januari. Tipe pasang Perairan Sendang Biru Malang merupakan campuran condong ke harian ganda
ON THE QUESTION OF WRITING AND PRESENTING EDUCATIONAL AND RESEARCH WORKS OF SCHOOLCHILDREN
Authors: Король Елена Витальевна , Царская Татьяна Сергеевна 
Published: August 2021

Современные методы и подходы в системе среднего образования позволяют заниматься исследовательской деятельностью школьникам разных возрастных категорий с учетом их индивидуальных интеллектуальных потребностей и возможностей. Ощущение удовлетворения учащихся от успешного выполнения учебно-исследовательской работы повышает у них познавательную активность и интерес как к самому процессу обучения, так и к дальнейшей исследовательской деятельности в будущем. В данной статье актуализируется проблема написания учебно-исследовательских работ учащихся среднеобразовательных учреждений в соответствии с требованиями Государственного образовательного стандарта среднего образования. На основе теоретического анализа психолого-педагогической литературы и практического многолетнего опыта работы в качестве члена жюри в секции «Иностранные языки» на различных этапах научно -практической конференции учащихся «Шаг в будущее» авторы предлагают практические рекомендации по подготовке к написанию и представлению учебно-исследовательских работ в аспекте изучения иностранного языка.
Modern methods and approaches in the secondary education system allow pupils of different age categories to engage in research activities, taking into account their individual intellectual needs and capabilities. The feeling of satisfaction of pupils from the successful completion of educational research work increases their cognitive activity and interest both in the learning process itself and in further research activities in the future.This article actualizes the problem of writing educational and research papers by students of secondary educational institutions in accordance with the requirements of the State Educational Standard of Secondary Education. Based on the theoretical analysis of psychological and pedagogical literature and practical longterm experience as a member of the jury in the “Foreign Languages” section at various stages of the scientific-practical conference of schoolchildren “Step into the Future”, the authors offer practical recommendations for writing and presenting educational and research work in the aspect of learning a foreign language.
DUAL FORM OF EDUCATION IN PROFESSIONAL TRAINING OF PEDAGOGICAL STAFF
Authors: Федорова Алевтина Николаевна , Иванов Владимир Николаевич 
Published: August 2021

В данной статье дается определение понятия «дуальное обучение», а также анализируется состояние исследуемой проблемы: описываются возможности дуального обучения на современном этапе развития высшего педагогического образования. Целью исследования является определение места дуального обучения в современном педагогическом образовании через обобщение опыта работы методистов по внедрению дуального обучения в процесс подготовки педагогических кадров. В работе использованы теоретические (анализ и обобщение) и эмпирические методы (беседа, наблюдение, анкетирование). Результаты исследования позволили авторам описать типы студентов, совмещающих работу и профессиональную деятельность, и определить, какие типы наставников, выделенных в трудах, посвященных дуальному обучению, могут способствовать профессиональному становлению педагогов. Исследование показало, что дуальное обучение нацелено на раннюю профессионализацию педагогов, сокращает разрыв между теорией и практикой, способствует профессиональному развитию педагогических кадров. Вместе с тем оно ставит перед системой высшего образования новые задачи: разработать программы дуального обучения, регламентировать трехсторонние отношения «вуз - студент - работодатель», подготовить наставников для эффективного функционирования и результативности данной формы обучения.
This article gives a definition of the concept of dual education, analyzes the state of the problem under consideration: describes the possibilities of dual education at the present stage of development of higher pedagogical education. The purpose of the study is to determine the place of dual education in modern pedagogical educational environment through the generalization of the experience of methodologists on the introduction of dual education in the process of training teachers. The work employs theoretical methods (analysis and generalization) and empirical methods (conversation, observation, questioning). The results of the study allowed the authors to describe the types of students who combine their work and professional activity and to determine what types of mentors (identified in the works devoted to dual education) can contribute to the professional development of future teachers. The study showed that dual education is aimed at early professionalization of teachers, narrows the gap between theory and practice, and contributes to the professional development of teaching staff. At the same time, it poses new tasks for the higher education system: to develop dual education programs, regulate the tripartite relationship “university - student - employer”, prepare mentors for the effective functioning and effectiveness of this form of education.
InspectTM Computed Tomography for NDT of Subsea Pipelines
Authors: Pettigrew Irene Grant , Barker Ashley , O'Brien Anthony , Cesan Alex 
Published: August 2021

Abstract
Using Computed Tomography (CT) for 3D spatial analysis is a well-established technique primarily used in the fields of medical imaging and precision defect analysis of materials such as aircraft CT technology is gradually evolving for asset integrity within the Oil and Gas sector for two main applications: in-line inspection (ILI) verification and non-intrusive inspection (NII) of coated subsea pipelines. The CT scanning philosophy for both types of inspection challenges varies significantly and in this paper is considered in terms of alignment of inspection deliverables with scan definition.
This paper explores the redesign of the traditional CT approach to optimize scanning for high-density target volumes by implementing a ground-up approach to all hardware and mathematics. The advanced algorithms used in the InspeCTTM technology enables a novel technique for image reconstruction; allowing for cleaner images than are possible using traditional CT whilst using less data and hence smaller radioactive sources. In addition, this paper demonstrates a selection of important findings from the InspeCTTM system qualification to API Standard 1163.
To maximize the effectiveness of the subsea campaign, use of automated analysis is demonstrated to provide consistency in interpretation and reduce the considerable time demands of high-volume data analysis enabling any remediation decisions or change to inspection strategy to be actioned at the time of inspection rather on a future campaign.
Troll Phase 3: The Next Step for a Groundbreaking Giant
Authors: Laastad Bjørn , Ellevog Knut , Oen Jensen Roger , Tveit Torstein , Torgrimsen Eirik , Jensen Ingmar 
Published: August 2021

Abstract
An important driver for maximizing value creation for the Troll Phase 3 gas project offshore Norway was to identify means to reduce the pressure drop in the value chain from the reservoir to the onshore terminal. Using a design-to-cost approach in the concept selection phase, this has affected design of the wells, subsea production system, pipeline and the new inlet separator on the Troll A platform; all of which have been designed to preserve the energy from the reservoir as much as possible. The final design has enabled a significant increase of the project value by accelerated gas deliveries, reduction of the energy consumption and thus lowering the CO2 emissions.
Calculations show that 1 bar pressure drop in the Troll Phase 3 value chain increases the project NPV (8%, pretax) with approx. 45 Million USD and reduces the power consumption by 11 GWh/year.
The well tubing size was increased to 9 5/8", reducing the required number of wells by ~40%. Factoring both wells and subsea facilities, this optimized well concept alone represents a total cost saving of nearly 300 million USD. The project has piloted a modification to the Vertical X-Mas Tree (VXT) design featuring an increase from 5 1/8" to a 7" production wing outlet to minimize the pressure drop across the subsea production system. This VXT design has become the new company standard for gas field developments. The big bore wells and subsea production system design also ensures acceptable gas velocities in the late production phase with low reservoir pressure.
The total reduced pressure drop obtained through these and other measures is estimated to 19 bar, realizing a project NPV improvement of approx. 850 million USD (8%, pretax).
Qualification of Mechanically Lined Pipe MLP with High Frequency Welded HFW Host Pipe for Subsea Applications with Reeling Installation
Authors: Macdonald Craig , Safari Javad , Anderson Stuart 
Published: August 2021

Abstract
Known as HFW-MLP, Mechanically Lined Pipe (MLP) with High Frequency Welded (HFW) host pipes are potentially the most cost-effective bi-metallic pipes for subsea pipelines when corrosion resistant alloys (CRA) are required. However, HFW-MLP has a very limited track record for subsea applications. This paper details a recent programme to qualify MLP with HFW host pipes.
The qualification programme has been performed in accordance with DNVGL-ST-F101 (2017) and internal supplementary requirements for reelability and weldability. It considers material testing of HFW-MLP at each manufacturing stage and product qualification including full-scale reeling simulation, anti-corrosion coating simulation and girth welding. Qualification is supplemented with a detailed evaluation of the manufacturing process
HFW-MLP is compared to traditional MLP which is supplied with seamless carbon steel as the host pipe or backing steel. This novel product lowers the supply cost, reducing the Capital Expenditure (CAPEX) for subsea pipeline projects. Detailed evaluation of mechanical test results and dimensional inspections using laser profiling assess the impact of the HFW host pipe longitudinal seam weld and conclude that there is no detrimental effect on the performance of the completed MLP. A comprehensive review of full-scale reeling simulations, coating simulations and welding trials is completed, with the conclusion that an HFW host pipe does not adversely affect the ability of the MLP product to be girth welded and to withstand the plastic deformation exerted upon the product during reel-lay installation. It is concluded that HFW-MLP is qualified for subsea pipeline static applications via the reel-lay, S-Lay or J-lay installation methods.
The qualification of HFW-MLP provides a more cost-effective solution for the development of corrosive subsea fields by reducing overall product supply and installation costs.
Standardization of Procurement Equipment Specifications: Establishing a Strong Foundation for Oil & Gas Capital Project Development and Delivery
Authors: Postema Adri 
Published: August 2021

Abstract
Operators need industry-wide standardization to manage the $3 trillion in CAPEX expenditure forecast for 2018-2025 (Global Data, 2018), while maintaining competitiveness and mitigating risks.
With the backing of the World Economic Forum, Joint Industry Program 33 (JIP 33) was initiated to drive industry-level standardization for procuring equipment items, moving the industry structurally – across the value chain - towards common engineering designs and solutions, established by means of cross-company and value-chain collaboration.
Over 40 standard specifications have been delivered to date. Their adoption by 12 major operators is being measured and is progressing well. This enables the program to capture and evaluate successes, challenges, key learnings and feedback. The program has also established a process for future maintenance of JIP33 specifications in order to achieve sustained benefits.
In the years to come the JIP33 program will continue to develop more new specifications, expand the scope of existing specifications and work with Standards Development Organizations to move valuable JIP33 content into the underlying parent standard.
This paper will present the current status of the JIP33 program and showcase some of its early successes, challenges and learnings.
Debris Capture Distribution in Deepwater Wells with Riser Filter Tool
Authors: Maher Peter Reid 
Published: August 2021

Abstract
In deepwater and ultra-deepwater wells, hydraulic debris removal, or the circulating of debris to surface, serves as the primary method of removing debris from the wellbore during the displacement of drilling fluid to completion fluid. In a standard cased hole completion, this operation typically takes place after the last liner has been set and before the completion is run. The likelihood of successful hydraulic debris removal is dependent on many factors such as debris particle size and density, flow rates and the resulting average annular velocity in the annulus, pipe movement, and the properties of the fluids circulated in the well. Mechanical debris extraction tools such as downhole filters and magnets are used to capture significant amounts of debris that are unable to be hydraulically removed from the wellbore. Versions of downhole filters and magnets that are run inside of casing and magnets run inside of the riser are common across the industry, however downhole filter tools run in the riser are less common and their use in these operations is not an industry standard. This paper examines a data set generated over two years containing more than 30 runs that include the use of a downhole filter tool run in the riser during wellbore clean out operations.
HPHT Subsea Connector Verification and Validation Using an API 17TR8 Methodology
Authors: Stewart Barry , Lee Sam Kwok Lun 
Published: August 2021

Abstract
Wellhead connectors form a critical part of subsea tree production systems. Their location in the riser load path means that they are subjected to high levels of bending and tension loading in addition to internal pressure and cyclic loading. As more fields continue to be discovered and developed that are defined as High Pressure and/or High Temperature (HPHT) these loading conditions become even more arduous. In order to ensure the integrity of HPHT components, industry requirements for components are setout in API 17TR8. This technical report provides a design verification methodology for HPHT products and some requirements for validation testing. The methodology provides detail on the assessment of static structural and cyclic capacities but less detail on how to assess the functional and serviceability criteria for wellhead connectors. Similarly, API 17TR8 does not include prescriptive validation requirements for wellhead connectors and refers back to historical methods. This paper describes a practical application of the API 17TR8 methodology to the development of a 20k HPHT connector and how it was implemented to verify and validate the connector design through full scale tests to failure.
A methodology was developed to meet the requirements of the relevant industry standards and applied to the connector to develop capacity charts for static combined loading. Verification was carried out on three dimensional 180° FEA models to ensure all non axi-symmetric loading is accurately captured. Connector capacities are defined based on API 17TR8 criteria with elastic plastic analysis (i.e. collapse load, local failure and ratcheting), functionality/serviceability criteria defined through a FMECA review and also including API STD 17G criteria including failure modes such as lock/unlock functionality, fracture based failure, mechanical disengagement, leakage and preload exceedance. These capacities are validated through full scale testing based on the requirements of API 17TR7 and API STD 17G with combined loading applied to the Normal, Extreme and Survival capacity curves (as defined by "as-built" FEA using actual material properties). Various test parameters such as strain gauge data, hub separation data, displacements, etc. were recorded and correlated to FEA prediction to prove the validity of the methodology. Further validation was carried out by applying a combined load up to the FEA predicted failure to confirm the design margins of the connector. Post-test review was carried out to review the suitability of the requirements set out in API 17TR8 and API STD 17G for the verification and validation of subsea connectors. The results build on previous test results to validate the effectiveness of the API 17TR8 code for verification and validation of connectors. The results show that real margins between failure of the connector and rated loads are higher than those defined in API 17TR8 and show that the methodology can be conservative.