bluuebunny/crossref_metadata_2025_split huggingface dataset:
Theoretical studies on the nature and conditions of interaction of heel and peripheral nose cones of offset roller cone bits with a bottom hole
Authors: Boreiko D. A. , Lutoev A. A. , Serikov D. Yu. 
Published: November 2022

An offset of roller cone rotation centerlines is used to increase the mechanical penetration rate while drilling in soft rocks. This enables increasing the area of a cutting structure teeth contact with a bottom hole. The analysis of offset cone drill bit (cutting structure) teeth wear showed that particularly significant wear is characteristic of the transition zone from the heel cone to the nose cone; which leads to significant reduction in the mechanical rate of penetration and a rapid decrease in the hole diameter. The purpose of this paper is to conduct a theoretical research on the nature and conditions of interaction between heel and peripheral nose cones of offset roller cone bits with a bottom hole; which is aimed at improving the efficiency of rock cutting by offset roller cone bits. To achieve the purpose; the authors analyzed data on the nature and causes of wear of existing offset roller cone bit cutting structure (teeth); developed a mathematical model in a cylindrical coordinate system allowing to determine the location and geometric parameters of the gage cone contact area with the hole wall for different roller cone bits sizes; developed a computer solid model for checking the adequacy of the mathematical model by comparing these two models; prepared recommendations for further improvement of the design of existing offset roller cone bit cutting structure (teeth). The research was carried out by the method of mathematical simulation of geometric figures and bodies corresponding to roller cones and a hole. The research has revealed that significant adjustments need to be made to the geometry of the roller cone teeth (currently being patented). This would allow decreasing the areas of cone heel blunting by 15–20 % as well as providing more prolonged contact of base and gage cones with bottom hole and wall surfaces. This allows to reduce wear of teeth in the transition zone of the generatrix from the peripheral nose cone to the gage (heel) cone of the roller cone and to maintain the required specific pressure on the cut rock for a longer period of time and; as a result; to increase both the mechanical penetration rate and the service life of the drilling tools.
Analytical review of the training system for mining engineers in Russia
Authors: Petrov V. L. 
Published: November 2022

Personnel training for the mineral resources sector in Russia has always been one of the most relevant topics for discussion in academic and professional mining community, including the international context. Experts from many countries regularly present their research on the state and achievements of higher education in mining in the national training systems for mining engineers. The purpose of this paper is to analyze and quantify the system of training for mining engineers in Russia. To assess the quantitative characteristics of the training of mining engineers in Russia, the research used methods of analysis based on the objective data of state statistics on the graduation of mining engineers in all universities, as well as admission to the corresponding professions and training programs. Thus, 5,031 mining engineers were trained in Russia in the specialties “Applied Geology”; “Geological Exploration”; “Mining”; “Physical Processes of Mining and Oil and Gas Production” in 2021. 10,789 bachelors and masters were trained under oil and gas directions of training. The results of the analysis are presented in the paper in the context of particular universities, specializations and directions of training of Federal Districts and the country as a whole. The quantitative parameters of personnel training for the mineral resource sector at Russian universities indicate the opportunity for the formation of human resources potential within the higher education system of the industry exclusively at the expense of their own academic schools.
Are scientific literacy and students’ environmental attitudes on ecosystem materials and environmental change correlated?
Authors: Dianti Putri Rahma , Sueb Sueb 
Published: November 2022

This study aims to analyze the relationship between scientific literacy and students' environmental attitudes. Data were collected using a survey method with scientific literacy test instruments and environmental attitude questionnaires. The research samples are 123 students of MAN 1 Kuantan Singingi, Riau. Data were analyzed using Spearman's Correlational test. The results of research for student scientific literacy in three indicators get an average score 65.5 for indicators explaining scientific phenomena, 60 for indicators of scientific design and evaluation and 83.6 for indicators of data interpretation and scientific facts. The results of students' environmental attitudes on the four indicators get an average of 3.9 and 3.7. The results of the correlation test shown that the correlation coefficient of scientific literacy and environmental attitudes is 0.850 > 0.05, which is not correlated. Based on this research, it can be explained that 1) the overall scientific literacy of students is in the moderate category 2) the overall environmental attitude of students is in the high category and 3) There is no correlation between students' scientific literacy and environmental attitudes. Pros and cons were found between the results of this study and previous studies. Further, broader research is needed to explore the causes of these differences, and to state their impact on education in the future.Abstrak Penelitian ini bertujuan untuk menganalisis hubungan antara literasi sains dan sikap lingkungan siswa. Pengumpulan data menggunakan metode survei dengan instrumen tes literasi sains dan angket sikap lingkungan. Sampel penelitian merupakan 123 siswa MAN 1 Kuantan Singingi, Riau. Data dianalisis menggunakan uji Korelasional Spearman. Hasil penelitian untuk literasi sains siswa pada tiga indikator mendapatkan rerata sebesar 65,5 untuk indikator menjelaskan fenomena saintifik, 60 untuk indikator desain dan evaluasi saintifik dan 83,6 untuk indikator interpretasi data dan fakta saintifik. Hasil sikap lingkungan siswa pada empat indikator mendapatkan rerata sebesar 3,9 dan 3,7. Hasil uji korelasi menunjukkan koefisien korelasi literasi sains dan sikap lingkungan sebesar 0,850 > 0,05, yaitu tidak berkorelasi. Berdasarkan penelitian tersebut dapat dijelaskan bahwa 1) Literasi sains siswa secara keseluruhan berada pada kategori sedang 2) Sikap lingkungan siswa secara keseluruhan berada pada kategori tinggi dan 3) Hasil uji korelasi menunjukkan tidak ada hubungan antara literasi sains siswa dan sikap lingkungan. Ditemukannya pro dan kontra antara hasil penelitian ini dengan penelitian-penelitian sebelumnya. Diperlukan penelitian lanjutan lebih luas untuk menelisik penyebab perbedaan tersebut, dan menyatakan dampaknya bagi pendidikan di masa depan.
PENGARUH PERENDAMAN WATER SETTABLE GIC PADA AIR SUNGAI DAN AIR PDAM TERHADAP KEKUATAN TARIK DIAMETRAL
Authors: Gunawan Muhammad Rezky , Diana Sherli , D. Setyawardhana R. Harry 
Published: November 2022

ABSTRACTBackground: Dental and oral health problems according to Riskesdas (2018) in Indonesia is 57.6% and South Borneo is almost 60%. High level of damage in South Borneo is caused by the people still consumption of river water as a source of clean water. Caries can be treated by restoration of tooth, one of them is water settable GIC.. Objective: Knowing the effect of water settable GIC immersion in river water and PDAM water to diametric tensile strength. Method: This study used a true experimental laboratory research method with a post test only design with a control group design on 27 samples which were divided into 3 groups immersion. Result: This research shows that the mean of diametric tensile strength in group 1 (7.15 MPa), group 2 (8.42 MPa), and group 3 (10.54 MPa). The One Way Anova statistical test shows the value of (P <0.05) which means that there is a significant difference in the value of the diametric tensile strength of each treatment group. Conclusion: There is an effect on the decrease in the value of the diametric tensile strength after immersion of water settable GIC in river water and PDAM water.Keywords: Diametric Tensile Strength. PDAM water, River water, Water settable GIC.ABSTRAKLatar Belakang: Masalah kesehatan gigi dan mulut menurut Riskesdas (2018) di Indonesia sebesar 57,6% dan di Kalimantan Selatan hampir 60%. Tingginya permasalahan kesehatan gigi dan mulut tersebut dikarenakan masyarakat masih menggunakan air sungai sebagai sumber air bersih. Karies gigi dapat dirawat dengan melakukan restorasi, salah satunya adalah water settable GIC. Tujuan: Mengetahui pengaruh perendaman water settable GIC pada air sungai dan air PDAM terhadap kekuatan tarik diametral. Metode: Penelitian ini menggunakan metode penelitian eksperimental murni laboratoris (true experimental laboratories) dengan rancangan post test only with control group design pada 27 sampel yang dibagi menjadi 3 kelompok perendaman. Hasil:Pada penelitian ini menunjukkan bahwa rata-rata kekuatan tarik diametral kelompok 1 (7,15MPa), kelompok 2 (8,42MPa), dan kelompok 3 (10,54MPa). Uji statistik One Way Anova menunjukkan nilai (P<0,05) yang berarti terdapat perbedaan bermakna pada nilai kekuatan tarik diametral setiap kelompok perlakuan. Kesimpulan: Terdapat pengaruh terhadap penurunan nilai kekuatan tarik diametral setelah perendaman water settable GIC pada air sungai dan air PDAM.Kata kunci: Air PDAM,Air sungai, Kekuatan tarik diametral, Water settable GIC.
PENGARUH APLIKASI BONDING ANTIBAKTERI TERHADAP JUMLAH BAKTERI LACTOBACILLUS ACIDOPHILUS YANG MELEKAT PADA TUMPATAN RESIN KOMPOSIT BIOAKTIF
Authors: Khadafi Muhammad Muamar , Ichrom Nahzi Muhammad Yanuar , Wibowo Diana 
Published: November 2022

ABSTRACTBackground: Adhesion of Lactobacillus acidophilus can cause secondary caries and failure of tooth restorations. One of the secondary caries prevention methods is the use of bioactive composite resins which have antibacterial properties. The antibacterial effect is further enhanced by the use of bonding which has antibacterial monomers. The two-step adhesive system in the 6th generation bonding has acid monomers which have been shown to significantly inhibit bacterial growth. Objective: To determine and analyze the effect of bonding application with antibacterial content on the amount of attachment of Lactobacillus acidophilus to bioactive composite resin restoration. Methods: This study design used true experimental with a post-test only design with control group design using 39 premolars 1 tooth divided into 3 groups: the treatment group that was given bonding and the control group that did not use bonding. Results: The results of the One Way ANOVA showed a significant difference (p = 0.000). Post hoc Bonferroni test results showed a significant difference (p = 0.000) between the treatment group and the control group. Conclusion: In the use of antibacterial, non-antibacterial bonding, and without bonding, there were significant differences in the number of attachments of Lactobacillus acidophilus to the restoration material.Keywords: Antibacterial, Bioactive Composite Resin, Lactobacillus acidophilus.ABSTRAKLatar Belakang: Perlekatan Lactobacillus acidophilus dapat menyebabkan terjadinya karies sekunder dan kegagalan restorasi gigi. Salah satu metode pencegahan karies sekunder adalah dengan penggunaan resin komposit bioaktif yang memiliki sifat antibakteri. Efek antibakteri semakin ditingkatkan dengan penggunaan bonding yang memiliki monomer antibakteri. Sistem adhesive two step pada bonding generasi ke-6 memiliki monomer asam yang terbukti signifikan menghambat pertumbuhan bakteri. Tujuan: Mengetahui dan menganalisis pengaruh aplikasi bonding dengan kandungan antibakteri terhadap jumlah perlekatan bakteri Lactobacillus acidophilus pada material restorasi resin komposit bioaktif. Metode: Desain penelitian ini menggunkan penelitian eksperimental murni (true experimental) dengan rancangan post test only with control group design menggunakan 39 gigi premolar 1 dibagi menjadi 3 kelompok: kelompok perlakuan yang diberi bonding dan kelompok kontrol yang tidak menggunakan bonding. Hasil: Hasil uji statistik One Way Anova menunjukkan perbedaan bermakna (p = 0,000). Hasil uji Post hoc bonferoni menunjukkan perbedaan bermakna (p = 0,000) antara kelompok perlakuan dan kelompok kontrol. Kesimpulan: Pada penggunaan bonding antibakteri, bonding non-antibakteri, dan tanpa bonding terdapat perbedaan yang signifikan pada jumlah bakteri Lactobacillus acidophilus yang melekat pada material restorasi.Kata kunci : Antibakteri, Lactobacillus acidophilus, Resin Komposit Bioaktif.
PREVALENSI DAN ANALISIS FAKTOR RISIKO KEJADIAN GINGIVITIS DAN PERIODONTITIS PADA PASIEN DIABETES MELITUS (Literature Review)
Authors: Rizkiyah Miftakhu , Oktiani Beta Widya , Wardani Ika Kusuma 
Published: November 2022

ABSTRACTBackground: Diabetes mellitus is associated with periodontal disease and considered as a risk factor for periodontal disease. Periodontal disease can be divided into gingivitis and periodontitis. Age, gender, blood glucose level, and duration of diabetes mellitus were considered as risk factors of gingivitis and periodontitis. Objective: To determine the prevalence and relationship between age, sex, blood glucose level, and duration of diabetes mellitus with gingivitis and periodontitis. Method: This study used a literature review research type. Data search was performed using PubMed, Google Scholar, and Science Direct. Literature screening based on the inclusions and continued with article selection. The selected literature is then extracted, analyzed, and synthesized. Results: A total of 38 articles selected because they match inclusion and exclusion criteria which using the keywords diabetes mellitus, risk factors, gingivitis, periodontal disease, periodontitis, and prevalence; published in 2011-2020; written in Indonesian or English; available in full text; and not duplication. Conclusion: Patients with diabetes mellitus experience more periodontitis. Age, sex, and duration of diabetes mellitus were associated with gingivitis and periodontitis. Keywords : Diabetes mellitus, Gingivitis, Periodontal Disease, Periodontitis, Prevalence, dan Risk factors.ABSTRAKLatar belakang: Diabetes melitus berhubungan dengan penyakit periodontal dan dianggap sebagai faktor risiko penyakit periodontal. Penyakit periodontal secara umum dapat dibedakan menjadi gingivitis dan periodontitis. Usia, jenis kelamin, kadar glukosa darah, dan durasi menderita diabetes melitus dianggap sebagai faktor risiko kejadian gingivitis dan periodontitis. Tujuan: Mengetahui prevalensi dan hubungan usia, jenis kelamin, kadar glukosa darah, dan durasi menderita diabetes melitus dengan kejadian gingivitis dan periodontitis. Metode: Penelitian ini menggunakan jenis penelitian literature review. Pencarian sumber data dilakukan menggunakan PubMed, Google Scholar, dan Science Direct. Screening literature berdasarkan inklusi dan dilanjutkan dengan seleksi artikel. Literature yang telah dipilih kemudian diekstraksi, dianalisis, dan disintesis. Hasil: Terdapat 38 artikel yang dipilih sesuai kriteria inklusi dan eksklusi yaitu menggunakan kata kunci diabetes melitus, faktor risiko, gingivitis, penyakit periodontal, periodontitis, dan prevalensi; dipublikasi tahun 2011-2020; ditulis dalam Bahasa Indonesia atau Inggris; tersedia dalam bentuk full text; dan bukan duplikasi. Kesimpulan: Pasien diabetes melitus lebih banyak mengalami periodontitis. Faktor risiko seperti usia, jenis kelamin, dan durasi menderita diabetes melitus berhubungan dengan kejadian gingivitis dan periodontitis. Kata kunci : Diabetes melitus, Faktor risiko, Gingivitis, Penyakit periodontal, Periodontitis, dan Prevalensi.
HUBUNGAN PENGETAHUAN, SIKAP DAN TINDAKAN KESEHATAN GIGI DAN MULUT TERHADAP TINGKAT KERUSAKAN GIGI PADA SISWA SMP
Authors: Namira Helena Maulida , Hatta Isnur , Sari Galuh Dwinta 
Published: November 2022

ABSTRACTBackground: Dental caries caused by lack of students’s knowledge, attitude and actions about dental and oral health is an important concern in health development. Dental and oral health maintenance behavior plays a important role in maintaining the health of student’s teeth from caries. Objectives: To analyze the relationship of knowledge, attitude and action of dental and oral health to the level of caries in grade 1 students at SMPN 1 Alalak Barito Kuala. Method: This research is an analytical observational study with cross sectional design. Total amount of respondents are 32 students. Respondent was examined by DMF-T index and then answered questionnaires about dental and oral health knowledge, attitudes, and actions. Furthermore the data was analyze using spearman test. Result: Spearman test showed that a relationship between knowledge, attitude and action with level of caries (p<0.05) in grade 1 students at SMPN 1 Alalak Barito Kuala. Conclusion: There is a meaningful relationship between knowledge, attitude and action with level of caries in grade 1 students at SMPN 1 Alalak Barito Kuala.Keyword: Action, Attitude, DMF-T, KnowledgeABSTRAKLatar Belakang: Masalah kerusakan gigi berupa karies gigi pada siswa yang disebabkan karena kurangnya pengetahuan, sikap dan tindakan siswa tentang pemeliharaan kesehatan gigi dan mulut. menjadi hal penting dalam pembangunan kesehatan. Perilaku pemeliharaan kesehatan gigi dan mulut merupakan hal yang berperan dalam menjaga kesehatan gigi siswa dari karies. Tujuan: Menganalisis hubungan pengetahuan, sikap dan tindakan kesehatan gigi dan mulut terhadap tingkat kerusakan gigi pada siswa kelas 1 di SMPN 1 Alalak Kabupaten Barito Kuala. Metode: Menggunakan rancangan cross sectional dengan responden penelitian sebesar 32 siswa. Masing-masing responden dilakukan pemeriksaan kerusakan gigi dan mulut dengan indeks DMF-T kemudian menjawab kuesioner mengenai pengetahuan, sikap, dan tindakan kesehatan gigi dan mulut. Data dianalisis menggunakan uji spearman. Hasil: Uji spearman menunjukkan hubungan bermakna antara pengetahuan, sikap dan tindakan dengan status kerusakan gigi dan mulut (p<0,05) pada siswa kelas 1 di SMPN 1 Alalak Kabupaten Barito Kuala. Kesimpulan: Terdapat hubungan bermakna antara pengetahuan, sikap dan tindakan dengan status kerusakan gigi dan mulut pada siswa kelas 1 di SMPN 1 Alalak Kabupaten Barito Kuala.Kata kunci: DMF-T, Pengetahuan, Sikap, Tindakan.
PENGARUH PERENDAMAN WATER SETTABLE GIC DALAM AIR SUNGAI DAN AIR PDAM TERHADAP KEKUATAN IKAT GESER
Authors: Alifuddin Nur As , Diana Sherli , Maglenda Buyung 
Published: November 2022

ABSTRACTBackground: River water is acidic, causing caries. Dental caries can be treated by performing restorations, one of which is GIC. Increasing technology, one of the newest is water settable GIC. Water-settable GIC can be directly mixed with sterile water making it easier for dentists because of its easy application. The advantage of water settable GIC is its high resistance to abrasion so it has a high shear bond strength. Objective: Knowing the effect of water settable GIC immersion in river water and PDAM water to diametric shear bond strength. Method: This.study used a true experimental laboratory research method with a post test only design with a control group design on 27 samples which were divided into 3 groups immersion. After immersion, the value of the diametral tensile strength is measured using a universal testing machine by compressing it until the sample breaks. Result: There was a significant difference between the value of the diametric tensile strength of the sample groups of water settable GIC that immersed in river water and the sample groups of conventional GIC that immersed in aquadest. Conclusion: There is an effect due to water settable GIC immersion in river water and PDAM water to shear bond.strength. Keywords: River Water, PDAM, Shear Bond Strength, Water Settable GIC. ABSTRAKLatar Belakang: Air sungai bersifat asam, sehingga menyebabkan terjadinya karies. Karies gigi dapat dirawat dengan melakukan restorasi, salah satunya adalah GIC. Semakin meningkatnya teknologi, Salah satu yang terbaru yaitu water settable GIC. Water-settable GIC dapat langsung di campur dengan air steril sehingga mempermudah dokter gigi karena pengaplikasiannya yang mudah. Kelebihan dari water settable GIC adalah resistensi yang tinggi terhadap abrasi sehingga memiliki kekuatan ikat geser yang tinggi.. Tujuan: Mengetahui pengaruh perendaman water settable GIC dalam air sungai dan air PDAM terhadap kekuatan ikat geser. Metode: Penelitian ini menggunakan metode penelitian eksperimental murni laboratoris (true experimental laboratories) dengan rancangan post test only with control group design pada 27 sampel yang dibagi menjadi 3 kelompok perendaman. Nilai kekuatan ikat geser pada sampel diukur dengan menggunakan universal testing machine. Hasil: Terdapat perbedaan bermakna antara nilai kekuatan ikat geser kelompok sampel water settable GIC yang direndam dalam air sungai dengan kelompok sampel water settable GIC yang direndam dalam akuades. Kesimpulan: Terdapat pengaruh akibat perendaman water settable GIC dalam air sungai dan air PDAM terhadap kekuatan ikat geser. Kata kunci : Air PDAM, Air sungai, Kekuatan Ikat Geser, Water settable GIC.