bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pembelajaran IPA Secara Dwibahasa Melalui MetodeBercerita untuk Meningkatkan Multiple Intelligences Siswa SD Laboratorium UPI Kampus Cibiru
Authors: Yanthi Novi 
Published: August 2016

Penelitian ini dilatarbelakangi oleh munculnya tren di bidang pendidikan dasar, yaitu proses pembelajaran di sekolah dasar yang mengajarkan materi subjek dalam bahasa Inggris sebagai media instruksi. Sekolah dasar di berbagai negara seperti Singapura, Cina, Malaysia, dan bahkan di Inggris (Dedezade: 2006) sekalipun telah mengaplikasikan bahasa Inggris sebagai media instruksi dalam mata pelajaran Matematika dan IPA secara dwibahasa. Tren pendidikan dasar ini juga sudah merambah ke Indonesia. Oleh karenanya, banyak sekolah dasar di Indonesia yang menetapkan kebijakan bahwa guru yang mengajar di satuan pendidikan tersebut harus memiliki keterampilan dasar bahasa Inggris agar mampu mengajarkan materi subjek menggunakan bahasa Inggris. Konsekuensi dari hal tersebut adalah guru sekolah dasar sebagai guru kelas tak hanya dituntut untuk dapat menguasai berbagai konsep materi subjek, namun harus pula terampil mengajarkannya dalam bahasa Inggris. Tujuan penelitian kali ini adalah untuk (1) mengetahui kendala yang dihadapi guru di kelas pada pembelajaran konsep IPA mengenai bagian tubuh hewan secara dwibahasa di kelas 2 SD melalui metode bercerita dan (2) mengetahui aspek multiple intelligences yang mana yang dapat ditingkatkan melalui pembelajaran IPA secara dwibahasa dengan metode bercerita. Peneliti memperhatikan proses pembelajaran IPA secara dwibahasa pada situasi natural melalui interaksi antara guru dengan siswa kelas 2 SD laboratorium UPI Kampus Cibiru. Hasil penelitian menunjukkan bahwa (1) kemampuan guru dalam membelajarkan konsep IPA secara dwibahasa melalui metode bercerita masih harus ditingkatkan. Guru terpaku pada RPP yang telah disusun sehingga tidak dapat mengeksplorasi dan mengembangkan kegiatan bercerita dalam pembelajaran secara terpadu. Hal ini disebabkan keterampilan bahasa Inggris guru masih kurang, yaitu dalam hal perbendaharaan kosakata, pemilihan kata yang sesuai dengan terminologi IPA, dan pelafalan kata sehingga menimbulkan kesalahan konsep IPA. Kendala‐kendala tersebut menyebabkan kurangnya kepercayaan diri guru saat melakukan tugas mengajar. (2) Pembelajaran IPA secara dwibahasa dengan metode bercerita dapat dijadikan alternatif upaya meningkatkan multiple intelligences siswa SD, yaitu kecerdasan naturalis, linguistik, visual‐spasial, dan interpersonal. Saran yang diajukan peneliti untuk meningkatkan kemampuan guru mengorganisasikan pembelajaran dwibahasa adalah dilaksanakannya program pelatihan atau seminar bagi kelompok guru SD. Pelatihan seperti ini dapat dilakukan melalui hubungan kemitraan antara kelompok guru dalam satuan pendidikan dengan LPTK penyelenggara program PGSD, salah satunya adalah UPI Kampus Cibiru
Model Pembelajaran Kooperatif Sebagai Upaya Penalaran Dan Komunikasi Matematika Siswa Sekolah Dasar
Authors: Priatna Dudung 
Published: August 2016

<p>Abstrak</p><p>Pembelajaran matematika perlu memperhatikan beberapa hal berikut diantaranya mengkondisikan siswa siswa untuk terbiasa dengan penyelidikan dan menemukan, fokus pada pendekatan pemecahan masalah, terampil untuk meningkatkan memecahkan masalah, serta memulai dengan pengenalan masalah yang sesuai dengan situasi (kontekstual problem). Penguasaan konsep matematika dimulai dengan mengajukan masalah‐masalah yang konstektual sehingga siswa secara bertahap dibimbing pengetahuan konseptual dan keterampilan prosedural. Salah satu model pembelajaran yang merupakan komponen pembelajaran kontekstual yang dapat diterapkan dalam pembelajaran matematika adalah model kooperatif. Sejalan dengan uraian di atas masalah dalam penelitian ini dirumuskan Bagaimana model pembelajaran kooperatif dapat meningkatkan penalaran dan komunikasi matematika siswa sekolah dasar Tujuan penelitian ini mengidentifikasi dan mendeskripsikan hal‐hal yang berkaitan dengan penggunaan model pembelajaran kooperatif sebagai upaya peningkatkan penalaran dan komunikasi matematika siswa SD Pendekatan yang digunakan dalam penelitian ini adalah pendekatan kualitatif dan jenis penelitiannya adalah penelitian tindakan kelas (PTK). Penelitian dilakukan dalam empat siklus, siklus I terdiri dari dua tindakan, siklus II terdiri dari dua tindakan, siklus III terdiri dari tiga tindakan, dan siklus IV terdiri dari dua tindakan. Hasil penelitian menunjukkan bahwa model pembelajaran kooperatif meningkatkan pengetahuan konseptual dan keterampilan prosedural siswa serta meningkatkan prestasi belajar siswa secara klasikal karena selama proses pembelajaran memuat kegiatan matematika (doing mathematics) yang aktif, generatif, dan eksploratif, sehingga siswa dituntut untuk mengembangkan berpikir dan bernalar (high level thinking and reasoning. Kata Kunci : model kooperatif , penalaran matematika, dan komunikasi matematika</p>
Meningkatkan Kemampuan Problem Posing Matematika Mahasiswa Calon Guru SD Melalui Model Pembelajaran SCPBL
Authors: S Dina Mayadiana 
Published: August 2016

<div data-canvas-width="33.18684673202614">Abstrak</div><div data-canvas-width="288.43921149111105">Penelitian ini bertujuan untuk menganalisis dan mendeskripsikan strategi</div><div data-canvas-width="316.4356353942484">penyelesaian mahasiswa untuk menjawab tugas dan tingkat kemampuan problem posing matematika (KPPM) setelah model pembelajaran SCPBL berlangsung. Penelitian didasari oleh problem posing sebagai komponen penting dalam doing matematika (Brown &amp; Walter, 1993) dan rendahnya TKPPM nahasiswa (Mayadiana, 2010). Model pembelajaran SCPBL dapat didesain oleh dosen sehingga mahasiswa terbiasa untuk menyelesaikan tugas TKPPM bila dipahami dari awal, inti, tujuan, dan sumber belajarnya.</div><div data-canvas-width="287.736598536013">Penelitian ini adalah penelitian eksperimen dengan sampel mahasiswa S-1</div><div data-canvas-width="316.49063074026145">PGSD B UPI sebanyak 47 mahasiswa kelas eksperimen dan 47 mahasiswa kelas</div><div data-canvas-width="174.6946130017647">kontrol (KK). Instrumen yang digunakan pada penelitian ini tes essay TKPPM</div><div data-canvas-width="316.0421342115684">terkait konsep Aljabar. Hasil penelitian menunjukkan bahwa strategi enyelesaian</div><div data-canvas-width="320.46736317437916">mahasiswa KE (Kelas Eksperimen) secara signifikan lebih baik dari pada mahasiswa KK. Selanjutnya untuk Tugas 1 dan 2, tingkat KPPM mahasiswa KE</div><div data-canvas-width="316.15022851235284">secara signifikan lebih baik daripada mahasiswa KK yaitu pada tingkat 4. Khusus</div><div data-canvas-width="280.49807316594774">untuk Tugas 3, mahasiswa KE dan KK keduanya berada pada Tingkat 5.</div><div data-canvas-width="280.49807316594774"> </div><div data-canvas-width="52.66183659">Kata Kunci: Model Pembelajaran SCPBL, Problem Posing, dan Matematika.</div>
Pemamfaatan Lagu Sebagai Implementasi Model Pakem Pada Jenjang Pendidikan Anak Usia Dini Dan Sekolah Dasar
Authors: Bakar Zulfa 
Published: August 2016

<p>ABSTRAK </p><p>Lagu efektif untuk digunakan sebagai media pembelajaran berbahasa khususnya menyimak karena memiliki dua unsur yaitu musik dan lirik. Musik dapat memfasilitasi kemampuan belajar berbahasa karena ritme musik dan pola kalimat memiliki bentuk serupa serta memiliki keseimbangan secara matematika sementara lirik membantu siswa memahami dan menyimak karena harus didengarkan dengan seksama. Pada implementasinya, Piaget menyarankan agar penggunaan lagu sebagai media belajar haruslah mempertimbangkan kesiapan siswa sesuai tahap perkembangan psikologisnya. Karena itu, pembelajaran melalui musik dalam rentang usia dini sampai sekolah dasar diarahkan pada kesempatan untuk bermusik, siswa mempelajari durasi melalui kegiatan bernyanyi, menggambar dan bergerak. Beberapa metode yang dapat digunakan antara lain memainkan alat musik dan bernyanyi serta membantu mereka menyimak dengan gerakan, potongan lagu atau gambar; membantu siswa membentuk "peta belajar' dengan menggerakkan jari di udara mengikuti alunan musik dan memindahkannya pada sebuah kertas serta menulis pengalaman, cerita atau interpretasi berdasarkan lagu yang meereka dengarkan yang dikombinasikan dengan pengalaman pribadi siswa. Dengan memperhatikan penunjuk dan memberikan kesempatan kepada peserta didik untuk lebih banyak "bermusik" daripada mengikuti materi melalui buku – maka orangtua, guru dan murid akan mendapatkan suasana yang menyenangkan saat membangun dasar yang kuat untuk melakukan proses pembelajaran.</p><p>Kata Kunci: Lagu, PAKEM, PAUD, Pendas</p>
Fracture Diagnosis in Multiple-Stage-Stimulated Horizontal Well by Temperature Measurements With Fast Marching Method
Authors: Cui Jingyuan , Yang Changdong , Zhu Ding , Datta-Gupta Akhil 
Published: August 2016

Summary
Downhole-temperature measurement is one of the solutions to understanding downhole-flow conditions, especially in complex well/reservoir domains such as multistage-fractured horizontal wells. In the past, models and methodologies have been developed for fracture diagnosis for multiple-stage-fractured horizontal wells. They are based either on a semianalytical approach for simplicity or on reservoir simulation for generality. The challenges are that semianalytical models are not robust enough to describe complex fracture systems, whereas numerical simulation is computationally expensive and impractical for inversion. To develop a comprehensive approach to translate temperature to flow profile, we adopted the fast marching method (FMM) in simulating both heat transfer and the velocity/pressure field in the interested domain (heterogeneous reservoir with multiple-fractured horizontal wells). FMM is a new approach that is efficient in front tracking. Previous studies show a significant success in the investigation of pressure-depletion behavior and shale-gas production-history match. By the nature of heat transfer in porous media, the thermal-front propagation would lag behind pressure, and the noticeable temperature change in the reservoir only happens near hydraulic/natural fractures. FMM can be used to efficiently track the heat front that is associated with the flow field.
In this study, we solve the thermal model in porous media by transforming the general energy-balance equation into a 1D equation, with the diffusive time of flight (DTOF) as the spatial coordinate system. Besides the diffusive heat conduction, the convection, Joule-Thomson effect, and viscous dissipation are considered in the model. The inner boundary of the model is carefully handled, and the drainage volume of each fracture is calculated to identify different inflow temperature related to flow rate at perforation locations. The model was validated by the finite-difference approach. Examples are presented in the paper to illustrate the application of the new method. The approach can be used to quantitatively interpret temperature measurements to fracture profiles in horizontal wells.
Application of Under-Balanced MPD in Fractured Granite Formation of Indonesia
Authors: Chen Peng , Wang Xi , Chen Lei , Wu Meng , Xin Junhe , Cheng Cunzhi , Chen Zhaofa 
Published: August 2016

Abstract
A lot of wells were drilled in the fractured granite formation of Indonesian Jabung Block without any oil and gas show. However, a discovery was made by the utilization of under-balanced MPD technology. This paper gives a description of the technological process of the MPD technology and equipment used in the exploratory well Basement-1#.
The 8-1/2in. hole section was drilled by application of MPD technology. The actual well depth is 8,269 ft, and the MPD hole section is between 4,993ft-8,269ft with footage of 3,276ft. The under-balanced drilling operation with managed pressure, tripping under managed pressure, displacement of weighted drilling fluid and overflow monitoring etc. had been successfully carried out during the MPD operation. Backpressure at wellhead was maintained in between 50-135psi. The abnormal downhole condition was monitored by little change of flow rate in and out of the well. Overflow was controlled in time and fluctuation of bottomhole pressure was decreased by use of accurate operation of the MPD equipment. A system of a synthetic based Gas-To-Liquid (GTL) drilling fluid was used to keep a low density as 7.4ppg since the formation pressure coefficient is around 1.04. The system kept good and stable performance with suspension and carrying capacity.
The overall MPD process was effective without any problems. No losses occur, and non-production time was reduced. Success ignition was not sooner than drilling 30ft into the basement. 57 times of successful ignition were done in 300hrs of MPD operation. The longest continuous ignition reached 75hrs out of total 240hrs of ignition. The maximum total hydrocarbon reached 36.3% and revealed good hydrocarbon shows.
Under-balanced managed pressure drilling could contribute to discovery of oil and gas reservoirs, make benefit to assessment of productivity of oil and gas wells. In addition, it increases rate of penetration, save overflow treatment time, and improve well control process.
Risk Reduction in the Acquisition of Formation Evaluation Data With the Development of Small-Diameter Open-Hole Logging Tools
Authors: Williams P. J. , Mayor T. , Pereira A. , Lawrance S. , Samworth J. R. , James T. , Patel H. 
Published: August 2016

Abstract
Post-drilling open-hole log measurements made by wireline tools are most commonly transmitted to surface via wireline, but the trend is towards increased use of memory-capable tools with greater operational flexibility. The primary purpose of the original memory tools was to operate on wireline in intermediate and TD sections while offering a low-risk alternative to conventional tools in horizontal wells, bad hole conditions and other challenging well scenarios.
This wide operational envelope required the tools to be small-diameter to allow protected conveyance inside drill pipe, but it also required that measurement performance and associated environmental characterization be on a par with conventionally sized tools that generated the majority of the historical record.
The extent to which these goals have been achieved, using evidence from the over 150,000 wells logged with the most highly developed of the small-diameter tool types, is reviewed.
Standard response modelling is essential but insufficient to ensure optimum measurement performance. Findings from the performance in thousands of wells have been used to refine models, hardware designs and processing algorithms, including more precise control on the position of tools in the wellbore.
Log data from test wells and commercial wells are provided showing the measurement quality from small-diameter tools matches that from conventionally sized tools for the large majority of operations.
Log data is also provided from wells that had presented insurmountable challenges for traditional logging tools which demonstrate the conveyance flexibility and the reduced acquisition risk in using the small-diameter tools.
The significance of the findings is that the performance of the most highly developed small-diameter tools has evolved to the point where measurement quality is not a differentiating factor for the large majority of operations, allowing job planning to be driven by the other considerations, in particular the minimization of acquisition risk.
Enhancing Zonal Isolation With Expandable Cement System for Gas Field
Authors: Tanoto E. , Kusumawatie R. , Inayah F. , Widyarsa I. , Jaffery M. F. 
Published: August 2016

Abstract
HPHT well subjects zonal isolation and long term cement integrity into critical factor to achieve long term production life. Repeated cycles of high differential pressure and temperature tend to break bonding between cement, casing and formation. Microannulus as consequence of debonding will provide space. At gas wells, it will provide space for gas migration which may lead to sustained casing pressure. Providing zonal isolation is also important to ensure there will be no communication between two different formations or reservoirs
This paper discusses the design, execution and evaluation of cement technology implemented at 9 5/8-in HPHT intermediate liner. Special softwares were used to simulate gas migration risk and stress analysis to cement sheath. High risk gas migration and microannulus were expected based on sofware results. An expandable cement system was identified as a solution and deployed successfully. In order to achieve better understanding of behaviour of cement slurry at field application, laboratory experiments were performed. To achieve long term cement integrity, it is not only about design of cement slurry, mud removal is one of the key factor need to be considered. Best practices were perfomed to achieve the highest mud removal efficiency.
Expansion test was perfomed by using pressure curing chamber at 247°F. Expansion was detected for six days simulation which was considered as enough based on stress analysis simulation of compression, traction and microannulus cement sheath performed. It was indicated that expandable cement managed to eliminate microannulus which was created by pressure and temperature changes. Evaluation was performed by locating pressure sensor at the A annulus of 9 5/8-in liner and 13 3/8-in casing. The sensor indicated zero pressure at the annulus while drilling next two more section and during the production life of the well
Evaluation of Miscible CO2-Flooding to Improve Oil Recovery in a Clastic Heterogeneous Reservoir
Authors: Al-Khazraji Ahmed Khalil , Awang Mariyamni B. 
Published: August 2016

Abstract
Carbon dioxide flooding is considered one of the most commonly used miscible gas injection to improve oil recovery and its applicability has grown significantly due to its availability, greenhouse effect and easy achievement of miscibility relative to other gasses. Therefore, miscible CO2-injection is considered one of the most feasible methods worldwide. For long term strategies in Iraq and the Middle East, most oil fields will need to improve oil recovery as oil reserves are falling. This paper presents a study of the effect of various miscible CO2-injection scenarios on the performance of the highly heterogeneous clastic reservoir in Iraq. An integrated field-scale reservoir simulation model of miscible CO2-flooding is accomplished. The compositional simulator, Eclipse-300 has been used to investigate the feasibility of miscible CO2-injection process. The process of the continuous CO2-injection was optimized to start in January 2056 as an improved oil recovery method after natural depletion and water flooding processes have been performed, and it will continue until January 2063. The minimum miscibility pressure (MMP) for CO2 was determined using empirical correlation as a function of crude oil composition and its properties. Ten miscible CO2-injection options were undertaken to investigate the reservoir performance. These options included applying a wide range of the CO2-injection rates ranged between 1.25 to 50 MMScf/day. All development options were analyzed with respect to net present value (NPV) calculations to confirm the more feasible CO2development strategy. The results showed that the application of CO2-injection option of a 20 MScf/day attained the highest recovery of 28% by January 2063 among the others. The recovery growth was so minor by the increasing the CO2-injection rate above this level. Based on economic findings the option of 20 MScf/day also attained the highest net present value (NPV). The results showed that after January 2063, the oil recovery attained by the different CO2-injection options are less than the one attained by the waterflooding process. Therefore, the miscible CO2-injection became unviable economically after January 2063.
Reducing Risk: Questions Oil and Gas Leaders Need to Ask and Answer
Authors: Matthews Teg 
Published: August 2016

Abstract
This presentation discusses the framework for understanding and responding to risk in the oil and gas industry, and identifies best practices for gathering the right information and improving safety performance. Specifically, risk identification systems should be designed to identify and remediate precursors to injury. Successful systems gain employee commitment across all levels, understanding the causes of precursors through data analysis, and identifying and addressing precursors with sustainable mechanisms. They leave no stone unturned, leveraging data from all departments of the organization, including process safety information (e.g., operational upsets, design flaws, catastrophic fires, and other related variables).
The Principle and Application of a Novel Rotary Percussion Drilling Tool Drived by Positive Displacement Motor
Authors: Xuan Lingchao , Guan Zhichuan , Hu Huaigang , Li Jingjiao , Zhang Bo 
Published: August 2016

Abstract
Experience over the past decades has proved that rotary percussion drilling technology is one of the most effective ways in improving the rate of penetration in deep wells. In the rock breaking process, the drill bit's teeth are forced into the rock powered by the bit weight and impact load, then the contact surfaces of rock and PDC teeth are destructed gradually. The finite element software was used to simulate the process of one PDC tooth breaking up the sandstone with the rotary percussion technology. The force on one PDC tooth in rotary percussion drilling was constantly fluctuating, and the impact load added the instability of load curve. The maximum mechanical strain appeared at the fracture surface, but not the contact surface of the rock with the PDC tooth. When the rock broken reached a steady state, the ratio of eroding energy to total energy consumption stabilized at around 52%.
The research showed that rotary percussion drilling technology is still not mature in the aspects of high-efficiency, long-life, and low-cost. The improvement of the comprehensive performance of the percussion tools needs more intensive study. This paper's objective is to design a novel rotary percussion tool to generate impact load. This new tool uses a positive displacement motor that drives the hammer piston to rotate, meanwhile the piston hits the anvil to generate impulse pulse. Also this tool's impact properties were tested and analyzed through field experiments. The impact frequency of this novel tool is 25.7~37.2Hz, which is adjusted by the flow rate of drilling fluid. The peak value of impact load is 20~42kN, adjusted by spring's compression.
Drilling tests in laboratory experiments showed that the rotary percussion drilling can significantly increase the rate of rock broken, and the highest rate of speed-up compared with the common drilling is 64.2%. Increasing spring compression can improve the rate of penetration in these percussion drilling experiments. A good performance in drilling sandstone experiments in lab experiments proves that this novel tool is helpful in improving the ROP in drilling deep wells onshore and offshore.