bluuebunny/crossref_metadata_2025_split huggingface dataset:
Wellhead Growth Evaluation and Analysis with Stiffness Method; an Onshore Gas Well Case Study
Authors: Darmawan Ganesha R 
Published: March 2022

One of the challenges in designing a production or an injector well is the potential of wellhead growth primarily because of casings thermal stress that are connected to the wellhead. Well integrity issue could occur if this movement was not addressed correctly. Casing thermal stress was created by temperature change in production or injection gas or fluids. That temperature change induces uncontrolled heat transfer from tubing to the casing strings in form of casing thermal stress.One of gas field in Indonesia was producing gas with formation water. One well was showing significant wellhead growth during production. The hazard noticed was the stiffness of the surface flowline equipment, as the wellhead moving upward, but the flowline is not free to move. The flange connection between the Christmases tree manifold to the flowline was the weak point, causing the well has to be shut in for further investigations.Well constructions data collection continued with analysis was performed with stiffness method in multistring well thermal growth model as explained and developed by Q. Jim Liang[1] to calculate casing thermal stress and wellhead growth. Thermal growth is sensitive to the length of free moving casing sections, as the heat transfer laterally to the casing strings. This paper will evaluate and analyze the cause of wellhead growth on gas production well with stiffness method in multistring casing, and estimating the cement column height on the casings that might cause the measured movement. A sensitivity of top of cements intermediate and production casing and how it affects the wellhead growth and thermal force. And also comparison forces between annulus pressure and temperature will also discussed in this paper.
Evaluation of Aerated Drilling in K-01 Geothermal Well using Guo Ghalambor’s Gas-Liquid Rate Window
Authors: Wardana Raka Sudira , Rasyidah Khansa 
Published: March 2022

Common problem in geothermal drilling is loss circulation problem. One of the common methods to cure loss circulation problem is using Lost Circulation Materials (LCM), but in the production zone, using LCM can damage the production zone. Therefore, underbalanced drilling is method that can be used to prevent loss circulation problems in production zone in geothermal well. One of the most common underbalanced drilling methods is aerated drilling or foam drilling. Aerated drilling was used to overcome the loss of circulation problem in production zone in K-01 Geothermal Well. Even though, the aerated drilling was already used, but the loss circulation problem was still occurred. The purpose of this research is to evaluate aerated drilling operation in K-01 Well using Guo Ghalambor’s Gas-Liquid Rate Window and make recommended gas-liquid rate for the next drilling operation. Gas-Liquid Rate Window is constructed using characteristic of the formation, drilling parameters, daily drilling report and also fluid injection characteristics that was used for aerated drilling operation in K-01 geothermal well. Using the constructed Gas-Liquid Rate Window, an evaluation is carried out for the drilling operation in K-01 geothermal well. The gas-liquid rate parameters used in aerated drilling operations is evaluated while checking the loss circulation event from the mud logging data. After the evaluation of the aerated drilling is carried out in then a suggestion is made for the next drilling operation. Based on the evaluation, the combination of gas-liquid rates that was used on the 9.875"hole section in K-01 Well was in the outside of the constructed GLRW therefore loss circulation problem occurred. The recommended gas-liquid rate combination from this research can be used to determine the gas-liquid rate combination to prevent loss circulation problems, wellbore damage and cutting transport problems.
STUDI LABORATORIUM PENGGUNAAN LUMPUR SMOOTH FLUID 05 DAN SARALINE PADA TEMPERATUR TINGGI
Authors: Rangga Wastu Apriandi Rizkina , Husla Ridha , Zabidi Lilik , Hamid Abdul 
Published: March 2022

Dalam operasi pemboran, lumpur pemboran mempunyai peranan yang sangat penting karena memiliki fungsi-fungsi yang tak tergantikan. Kegiatan pemboran berhubungan dengan masalah-masalah yang disebabkan oleh kondisi yang kompleks di formasi karena adanya perubahan temperatur, tekanan, dan kontaminasi dari fluida formasi. Penggunaa lumpur pemboran diperlukan untuk dapat menghadapi permasalahan-permasalahan tersebut. Pada penelitian mempunyai latarbelakang untuk mengetahuai seberapa berhasilkan penggunaan system lumpur Oil Base Mud berupa Saraline dan Smooth Fluid 05. Diketahui pada pemboran offshore pengaruh tekanan dan temperatur sangat mempengaruhi kualitas dari lumpur yang digunakan. Pada saat sirkulasi lumpur akan mendapat pengaruh temperatur tinggi dari formasi tersebut. Pada pembuatan lumpur pemboran ini dilakukan untuk memperoleh suatu hasil formulasi yang tahan terhadap perubahan temperatur, tekanan, dan kontaminasi oleh karena itu pemilihan aditif sangat penting, terutama jika terjadi perubahan temperatur pada lapangan tersebut serta kompatibel satu sama lain. Pengujian pada lumpur ini yaitu untuk mengetahui apakah terjadi perubahan pada sifat fisik lumpur tersebut seperti densitas, rheology lumpur, filtration loss, dan electrical stability jika lumpur tersebut diberikan perubahan temperatur tinggi. Berdasarkan hasil penelitian ini bahwa semakin tinggi temperatur maka nilai densitas dan rheology lumpur (plastik viskositas, yield point dan gel strength), tersebut akan semakin menurun dikarenakan faktor dari suhu tersebut yang membuat lumpur semakin encer. Pada nilai Filtration loss pada kedua sample tersebut menunjukan kenaikan sebesar 4,6 – 5,5 cc/30 menit namun masih dalam batas wajar karna masih sesuai dengan standarisasi yang digunakan. Pada nilai electrical stabilitas pada kedua sample lumpur tersebut menunjukkan semakin tinggi temperatur maka nilai electrical stabilitas pada sample lumpur tersebut akan semakin menurun, namun hasil pada sample lumpur ini mempunyai hasil diatas 500 volt maka komposisi lumpur minyak saraline dan smooth fluid 05 dengan nilai oil water ratio 85:15 mempunyai kandungan oilwet yang sangat baik Kata kunci: Lumpur Pemboran, Oil Base Mud, Temperatur, rheology, Filtration loss, Electrical Stability, Saraline, Smooth Fluid 05
ANALYSIS OF NATURAL TOURISM POTENTIAL OF SEMANGAT GUNUNG VIILAGE KARO REGENCY, NORTH SUMATERA WITH QUANTITATIVE QUALITATIVE DESCRIPTIVE METHOD
Authors: Sinuraya Sherly Ennina Maretha , Rostian Titien Suryanti , Pangaribowo R L 
Published: March 2022

A brief, clear and comprehensive summary of the contents of the article containing :North Sumatra Province has natural, cultural, historical and culinary tourism resources well-known at home and abroad. There are many natural and cultural attractions which is the advantage of North Sumatra Province, one of the regencies located in North Sumatra, has a very interesting landscape for it’s culture and nature, namely Karo Regency.One of the villages in Karo Regency, North Sumatra has a various natural and cultural attraction, namely Desa Semangat Gunung, among others the state of the flora and fauna of an area with natural landscape such as forests, mountains, and so on which includes the physical condition of an area. How is the potential for natural tourism which if found in the Desa Semangat Gunung with qualitative descriptive method techniques quantitative?This study aims to analyze the natural tourism potential of Desa Semangat Gunung as tourism villages. The method used in this research is descriptive quantitative qualitative. The tools and materials used are hardware such as laptops, writing, software such as miscrosoft, photoshop, autocad and etc.The results of this study plan Desa Semangat Gunung as a tourism village based on nature tourism by looking at visuals the existing landscape in the village area Keywords: analysis of the potential for natural tourism, tourist villages, mountain spirit villages, disticts karo
Activity of Gaharu (Aquilaria malaccensis Lam) Leaves Extract and Fraction as Herbal Drug Against α-Glucosidase Inhibition
Authors: Aris Suhardiman  , Ketut Adnyana I.  , Ika Kurnia Sukamawati  , Titin Rostinawati  
Published: March 2022

Diabetes mellitus in 2020 in the world was 422 million people, and 1,6 million deaths are directly attributed to diabetes each year. Diabetes mellitus is a disease characterized by increased levels of glucose in the blood due to impaired function of the pancreas gland in producing the hormone insulin. One of the mechanisms of action of the antidiabetic drug class is α-glucosidase enzyme inhibitors. Compounds that play a role in the inhibitory activity of the α-glucosidase enzyme from plant extracts are flavonoids. Agarwood (Aquilaria malaccensis Lam) plants contain secondary metabolites such as alkaloids, flavonoids, saponins, quinones, tannins and steroids/triterpenoids. Gaharu leaves were extracted by maceration method using 96% ethanol solvent, then the extract obtained was fractionated using a liquid-liquid extraction method with n-hexane, ethylacetate and methanol-water as solvents. The extracts and fractions obtained were tested for inhibition of the α-glucosidase enzyme as measured by a microplate reader at a wavelength of 405 nm and acarbose as a comparison. The inhibitory activity of the α-glucosidase enzyme is expressed by the IC50 value. The inhibitory activity of α-glucosidase enzyme from extracts and fractions of n-hexane, ethylacetate and methanol-water were 90,87 µg/ml; 908,53 µg/ml; 89,78 µg/ml and 35,89 µg/ml and acarbose 19,08 µg/ml. The methanol-water fraction showed a very strong inhibitory activity against the α-glucosidase enzyme.
MENUMBUHKAN JIWA ENTREPRENEURSHIP MUSLIM YANG SUKSES
Authors: Fadillah Nur 
Published: March 2022

AbstractEntrepreneurship spirit of Prophet Muhammad, does not just happen, but the result of a long process and started from his childhood (Antonio 2008). This opinions is agreed by most teachers leadership that said what occurred in the first years of our lives, will make a meaningful difference in the next life period Majority, Indonesian is Muslim. Hence, it becomes a task to be able to give birth to the entrepreneur (entrepreneur) Muslim reliable. Therefore, throughout the history of Islam began, the Muslim entrepreneur born and incised gold ink in the history of the world. Mohammed, before being known as prophet, has been recorded as an entrepreneur.Personal success is personal to identify, optimize potency, identity continuously with full confidence and strong self confidence. Then the person utilizing the potential so beneficial for families, neighbors and other community members, and the environment. The value of the benefit is called a success.A successful businessman, according to Islam, is who is running the commands of Allah in all its aspects, including in its business, away from enforcing the lawful and the unlawful. Then the whole business is obtained solely to enforce his servitude to Allah SWT. Keywords: Entrepreneurship, Business Ethics Islam, Small Business AbstrakJiwa kewirausahaan (enterpreneurship) dalam diri Nabi Muhammad SAW, tidak terjadi begitu saja, tetapi hasil dari suatu proses panjang dan dimulai sejak beliau kecil. Pendapat ini diakui oleh kebanyakan guru leadership yang sepakat bahwa apa yang terjadi pada tahun-tahun pertama kehidupan manusia, akan membuat perbedaan yang berarti dalam periode kehidupan berikutnya.Mayoritas bangsa Indonesia adalah muslim. Dengan demikian merupakan tugas bersama untuk mampu melahirkan para entrepreneur (pengusaha) muslim yang handal. Sebab, sepanjang sejarah Islam dimulai, para entrepreneur muslim lahir dan menorehkan tinta emasnya dalam sejarah dunia. Rasulullah SAW sebelum menjadi rasul telah tercatat sebagai entrepreneur.Pribadi yang sukses adalah pribadi yang bisa mengenal, mengoptimalkan potensi, jati diri secara terus-menerus dengan penuh kepercayaan dan keyakinan diri yang kuat. Kemudian orang tersebut mendayagunakan potensinya sehingga bermanfaat untuk keluarga, tetangga maupun anggota masyarakat lain, dan lingkungannya. Nilai kemanfaatan inilah yang disebut sukses.Seorang pengusaha yang sukses, menurut Islam, adalah yang menjalankan perintah Allah SWT dalam seluruh aspeknya, termasuk dalam usahanya, menegakkan yang halal dan menjauhi yang haram. Kemudian seluruh usaha yang diperolehnya semata-mata adalah untuk menegakkan penghambaan dirinya kepada Allah SWT semata.Kata Kunci: Kewirausahaan, Etika Bisnis Islam, Usaha Kecil
Pengaruh Kualitas Pelayanan Dan Fasilitas Pendukung Terhadap Kepuasan Pelanggan Stasiun Lempuyangan Yogyakarta
Authors: Puspita Richa Mega , Santoso Singgih 
Published: March 2022

Setiap perusahaan pasti akan melakukan berbagai macam upaya untuk memberikan kepuasan kepada para pelanggannya, begitu juga pihak manajemen stasiun kereta api Lempuyangan Yogyakarta. Permasalahan yang dikaji dalam penelitian ini adalah menguji pengaruh dimensi variabel kualitas pelayanan yang meliputi keandalan, daya tanggap, jaminan, empati, dan bukti fisik, serta variabel fasilitas pendukung terhadap kepuasan pelanggan Stasiun Lempuyangan Yogyakarta. Jenis penelitian ini adalah kuantitatif dengan menggunakan alat analisa regresi linear berganda. Data diperoleh melalui penyebaran kuesioner kepada 100 orang responden yang diambil melalui metode incidental sampling. Berdasarkan hasil pengujian hipotesis yang dilakukan dapat disimpulkan bahwa variabel keandalan dan empati secara parsial tidak berpengaruh terhadap kepuasan pelanggan Stasiun Lempuyangan Yogyakarta. Sedangkan variabel lainnya yaitu daya tanggap, jaminan, dan bukti fisik serta fasilitas pendukung secara parsial memiliki pengaruh yang positif dan signifikan terhadap kepuasan pelanggan Stasiun Lempuyangan Yogyakarta.
Model Penerapan Informasi Pada Usaha Kecil Dan Menengah Di Kota Palembang
Authors: Maretha Fetty , Sepriansyah Sepriansyah , Gunawan Ahmad Ari 
Published: March 2022

Tujuan penelitian ini adalah membuat model penerapan informasi pada UKM di Kota Palembang yang baru berdiri tiga tahun. Jenis Penelitian ini adalah kualitatif berupa analisa (strengths), kelemahan (weaknesses), peluang (opportunities), dan ancaman (threats) yang disingkat SWOT. Jumlah responden sampel sebanyak 116 orang pelaku/pemilik UKM di Kota Palembang yang baru berjalan selama tiga tahun dan memiliki hasil penjualan maksimal Rp300.000.000/tahun. Teknik pengumpulan data berupa wawancara dan observasi. Hasil penelitian menunjukan bahwa perlunya komitmen pemilik UKM, karena akan menguatkan konsep analisis kebutuhan pemanfaatan teknologi informasi. Zona informasi broadscope diperlukan untuk memperhatikan pesaing, kematangan perencanaan keuangan masa depan, dan untuk memperkuat keunikan usaha. Setelah hal tersebut dipenuhi maka dilakukan implementasi teknologi informasi dan digitalisasi marketing yang nantinya akan menunjang efisiensi operasional usaha dan peningkatan strategi pemasaran. Pada posisi inilah zona peran pihak eksternal, peran penting berbagai pihak diperlukan. Hasil akhirnya adalah peningkatan pada kinerja UKM yang ditunjang oleh kuatnya orientasi kewirausahaan para pemilik usaha.
Development of Assessment Instrument Based on Higher Order Thinking Skills of Respiratory System of Grade XI of Senior High School
Authors: Ulfa Maria , Kuswanti Nur 
Published: March 2022

Higher order thinking skills (HOTS) is a thinking process at a higher level. It is not just memorizing facts, it involves mental activity in an effort to explore complex, reflective, and creative experiences. Indicators for measuring higher order thinking skills are analyzing, evaluating, and creating. These three indicators include critical thinking, creative thinking, problem solving, and decision-making skills. This research aimed to describe validity, reliability, and level of difficulty test items of higher order thinking skills of Respiratory System matter. This was development research referring to the ADDIE model (Analyze, Design, Development, Implementation, and Evaluation). The development of HOTS based assessment instrument was conducted at Biology Department – Universitas Negeri Surabaya and the trial activity was conducted at SMA Negeri 2 Sidoarjo. The theoretical validity was determined based on the results of the validation by matter expert and education expert using the validation sheet. The aspect of validity rated based on the aspects of concept, construction, language, and HOTS. The empirical validity was determined based on the result test items of HOTS on 40 students of class XI to identified empirical validity, reliability, and difficulty levels using the HOTS-based test items sheet. The results showed that the theoretical validity of the assessment instrument reached 98.19% and included in a very valid category. The empirical validity of 15 test items of HOTS were considered valid with the value of R (count) > 0.312. The reliability value of assessment instrument was 0.740 with a high level of consistency. The proportion of difficulty level was 60% with moderate category and 40% with difficult category. Based on the research results, it can be concluded that the HOTS-based assessment instrument of the Respiratory System was valid and reliable.
Keywords: higher order thinking skills, theoretical validity, empirical validity, reliability, level of difficulty, Respiratory System.
Validitas Lembar Kegiatan Peserta Didik (LKPD) Berbasis Inkuiri Terbimbing pada Materi Perubahan Lingkungan untuk Melatihkan Keterampilan Proses Peserta Didik Kelas X SMA
Authors: Novitasari Firda Dwi , Budijastuti Widowati 
Published: March 2022

Keterampilan proses adalah seperangkat keterampilan untuk mencari dan membentuk pengetahuan dalam kebenaran ilmiah. Dengan melakukan penyelidikan peserta didik dapat meningkatkan pola pikir, menemukan konsep, dan membangun konsep secara mandiri. Adanya Lembar Kegiatan Peserta Didik (LKPD) berbasis inkuiri terbimbing berisi kegiatan praktikum pada materi perubahan lingkungan yang berorientasi suatu masalah dalam kehidupan nyata dapat melatihkan keterampilan proses peserta didik. Penelitian bertujuan untuk mendeskripsikan validitas teoretis LKPD berbasis inkuiri terbimbing pada materi perubahan lingkungan untuk melatihkan keterampilan proses. Model penelitian ini yakni pengembangan 4-D (Define, Design, Develop tanpa Disseminate). Parameter yang diukur dalam penelitian adalah validitas teoretis LKPD ditinjau berdasarkan perolehan skor hasil validasi oleh tiga validator. Teknik analisis data menggunakan analisis deskriptif kuantitatif. Hasil validasi keseluruhan LKPD menunjukkan hasil sebesar 96,18% dengan kriteria sangat valid, dan berdasarkan masing-masing aspek kelayakan peyajian, bahasa, isi, karakteristik LKPD berbasis inkuiri terbimbing, dan karakteristik LKPD untuk melatihkan keterampilan proses memperoleh persentase validitas sebesar 92,8%; 95,8%; 94,5; 98,6%; 99,2% dengan kriteria sangat valid. Berdasarkan hasil tersebut menunjukkan bahwa LKPD dinyatakan valid dan layak ditinjau dari aspek validitas.
Kata Kunci: LKPD, inkuiri terbimbing, keterampilan proses, perubahan lingkungan.
Literature Study about Application Android Media on Biological Learning Process
Authors: Atmaja Mahiaka Dwi , Raharjo Raharjo 
Published: March 2022

In the learning process needed a good strategy to achieve learning goals. One of them is the use of media so that the learning process runs well. The development of the times has brought the world of education more advanced because of the floating technology and information. Android is very popular and many people use it among the people. Many Android applications have been developed for education. In biology, there are a lot of material and need to help overcome material that is still abstract or unclear. A strategy is needed to overcome this, one of which is the use of Android application media. Literature study that have been published say that Android application media can significantly improve students' understanding. The media is also very effective because it has the characteristics of being flexible to use anytime and anywhere, interactive and communicative that can attract students, and make it easier to understand the material so that knowledge is more concrete and can support student learning outcomes. The effectiveness of android applications can be seen from the results of media user satisfaction and can be seen in research that has used applications. This can be seen from the completeness of the learning outcomes of students reaching ≥75%.
Keywords: learning media, Android aplication, biology material, learning process, learning goals.
Kelayakan LKPD Lumut Berbasis Discovery Learning untuk Melatihkan Keterampilan Literasi Sains
Authors: Rohmah Afifatur , Wisanti Wisanti , Putri Eva Kristinawati 
Published: March 2022

Topik lumut merupakan satu dari beberapa materi yang menuntut kompetensi mengelompokkan, mengamati, menganalisis, menjelaskan dan menyimpulkan, dan melalui aktivitas penemuan sendiri maka peserta didik bisa lebih mudah memahami konsep materi. Hal ini didukung dengan adanya penggunaan Lembar Kegiatan Peserta Didik (LKPD) berbasis discovery learning yang bisa membimbing peserta didik dalam menguasai materi yang dipelajari. Penelitian ini bertujuan untuk menghasilkan LKPD “Lumut” berbasis discovery learning untuk melatihkan keterampilan literasi sains peserta didik yang dinyatakan layak secara teoretis. Jenis penelitian ini termasuk dalam penelitian pengembangan dengan model 4-D dengan tahapan Define (pendefinisian), Design (perancangan), Develop (pengembangan), dan Disseminate (penyebaran). Tahap disseminate pada penelitian ini tidak dilaksanakan. Tahap pengembangan dilakukan di jurusan Biologi FMIPA Universitas Negeri Surabaya. Uji kelayakan teoretis dilakukan pada tahap pengembangan berdasarkan penilaian pakar pendidikan dan pakar botani. Intrumen penelitian berupa lembar validitas yang berisi 44 pertanyaan yang tekait aspek konstruksi, teknis, dan dikdaktik. LKPD dinyatakan layak secara teoretis jika penilaian validasi pakar mendapat persentase rata-rata ≥ 71%. Analisis data dilakukan secara deskriptif kuantitatif. Hasil penelitian mengungkapkan bahwa validitas LKPD mendapat nilai 97,93% dengan kriteria sangat valid. Dengan demikian LKPD “Lumut” berbasis discovery learning untuk melatihkan keterampilan literasi sains dinyatakan layak secara teoretis dengan kriteria sangat valid.
Kata kunci: Lembar Kegiatan Peserta Didik (LKPD), Discovery Learning, Kelayakan, Literasi sains.