bluuebunny/crossref_metadata_2025_split huggingface dataset:
The strategies applied by teachers in teaching speaking
Authors: Maryanti Maryanti , Gani Sofyan Abdul , Marhaban Saiful 
Published: January 2022

The teaching of English is very important for young learners in the era of industry 4.0. A successful teacher is largely determined by the strategies he/she uses in the learning process. The students in SMP Negeri 1 Sabang were very interested in speaking English. They had won many events in English speaking competitions and mostly reached a good score on speaking test. This research was conducted to find out the strategies used, problems, and the solutions faced by the teachers during a teaching process at SMP Negeri 1 Kota Sabang. The research method of this study is descriptive qualitative by employing observation and interview guide sheets as the research instruments. The participants of this research were three English teachers at SMP Negeri 1 Sabang. The results show that the teachers used various kinds of strategies in teaching speaking; role-play, picture describing, interview, and simulations. It was also found that there were five obstacles during the teaching process; some students disturb their friends, ignore the learning process, bully their friends, lack in vocabulary, and possess limited teaching and learning duration. The solutions in solving the problems show that the teachers use four approaches to solve the problems: teachers maximized student's centered, motivated deeply and sustainably, provided a new vocabulary, and extra time online. It is suggested that English teachers should always find new ideas, strategies, or techniques in teaching-learning so that students are interested in taking part actively in the learning process.
The essential benefits of an enterprise blockchain in business model innovation
Authors: Purusottama Ambara , Kadarusman Yohanes Berenika 
Published: January 2022

Blockchain brings changes and disruptions to the existing business models and therefore deserves further analysis. Accordingly, this study aims to explain the phenomenon of blockchain technology in the business model innovation in the enterprise ecosystem. Empirically, numerous studies have shown that blockchain technology improves organizational performance. This study uses a value system framework to explain the enterprise blockchain phenomenon. Through abductive reasoning, this study uses a multiple-case study to answer the research questions. In sum, this study finds that blockchain technology delivers benefits to organizations in: (i) value capture through increased profitability; (ii) value creation through private partnership; (iii) value delivery through smart contracts; and (iv) value proposition that encourages improving the existing value proposition through operational improvements. Besides, the study also proposes the different types of enterprise blockchain ecosystems: private and consortium. The private ecosystem focuses on improving organizational performance through competition. In contrast, the consortium ecosystem focuses on business value collaboration.
Groundwater Effect on Slope Stability in Open Pit Mining: a Case of West Kutai Regency, East Kalimantan, Indonesia
Authors: Devy Shalaho Dina , Hutahayan Pretty Permatasari 
Published: January 2022

The stability of open pit slopes in Biangan district, West Kutai Regency, East Kalimantan Province, is greatly influenced by groundwater conditions. The existence of groundwater reduces the shear strength of the materials which causes a decrease in the stability value of pit slopes. The main objective of this study is to assess the impact of groundwater on the stability of the low wall and high wall pit mining. Groundwater modeling is used to determine the prediction of groundwater level on the pit slope which determines the value of the slope stability. Slope stability analysis in this study was performed using the Finite Element Method, producing output in the form of strain zones, deformation and displacement values. Therefore, the Strength Reduction Factor (SRF) approach was used, which is a gradual reduction of shear strength until the values of cohesion and friction angles reach minimums and the slopes are at a critical state. Groundwater modeling results indicate that groundwater flows to the Biangan river with hydraulic heads between 76 and 108 meters above sea level. Based on the analysis using the Finite Element Method, the stability values of the pit slopes, which are influenced by groundwater, are 0.65 on the low wall and 1.40 on the high wall. The total displacements are 0.019 meters on the low wall and 0.002 meters on the high wall. The impact of groundwater on the slope is an increase in the slope load. This increases the materials’ thrust and reduces the shear strength of the materials which reduces the rock mass that can function as a water seepage path. Thus, the recommendation for low wall pit construction is a safety factor of 7.79 with a total displacement of 0.020 meters.
Tectonic Geomorphic of Sulawesi Island and Its Implication for Future Large Earthquake
Authors: Cahyaningsih Catur , Admojo Yos 
Published: January 2022

This paper analyzes how resource of past and prospective great earthquake on the Central Sulawesi Arm, adhere on topography analysis from several space-based source. To answer the question, we analysis the tectonic geomorphic, stream pattern, exhumed fault, geological mapping and seismicity data. Detailed tectonic geomorphic studies in Sulawesi still lacking due to tectonic and fault obscures. For instance, Palu Koro Fault (PKF) was unpredictable, because the historical seismic records inevitably remain poorly documented and unrecognized fault strand, which was buried beneath abundant Quaternary alluvium subsequently obscured the fault trace. In other hand, the faults have been active during Quaternary must take into account because potentially dangerous, also the inactive faults during instrumental period must be re-evaluated in order to have awareness for large future large earthquake. Surprisingly, recent seismic activity of PKF generate super shear rupture a Mw 7.5 earthquake on 28th September 2018 with average slip 41 mm/year, which over the past two decade quiet from any seismic activity. The seismic potential for large fault is essential, since it has been silent during the instrumental period. Therefore, our motivation in this study to produce detail tectonic geomorphic map of the region in local scale, which is currently not available to prepare better knowledge and awareness for the large future earthquake. We have use Shuttle Radar Topography Mission (SRTM) with resolution ~30m, which run by ArcGIS software to observed tectonic geomorphic evidence of fault system and supplement with structural, geological and bathymetric data’s as ware available to us. We relate this analysis with seismicity data from Centroid Moment Tensor Solution (CMT) to recognize the seismic source. Our results show the tectonic geomorphic of Central Sulawesi Arm due to nature extension of NNW-SSE left-lateral slip curving to WNW-ESE of Palu-Koro Fault (PKF), then transcript to N-S circular normal fault of Poso Fault (PF). The PF indicate replica of PKF curving, where has not been mapped previously. We have mapped 60 major onshore fault systems, 10 faults showed evidence maximal to rapid rate tectonic activity along instrumental periods. Based on our CMT analysis, Sulawesi Island is greatly dominated by oblique fault.
Analysis of Management Systems in Wastewater Processing at Regional Public Hospital in Teluk Kuantan 2018
Authors: Tonis Marian , Djuhaeni Henni , Arnawilis Arnawilis 
Published: January 2022

Wastewater Treatment Plant (WWTP/IPAL) is a building that functions to derived from activities in health care facilities. In Teluk Kuantan Regional General Hospital (RSUD), wastewater treatment has not work according to the procedure because of a leak in the IPAL pipelines. The objective of research is to provide in-depth information about the analysis of management elements and management functions in Wastewater Treatment at Regional General Hospital in Taluk Kuantan, 2018.
This research uses qualitative research with explorative approach, in Regional General Hospital in Taluk Kuantan. There were 5 informants, Head of Infrastructure Facilities, Social Sciences, Management Staff and 2 staff of IPAL. The research used the interviews, observation, and documents. Data processing was done by data reduction, data presentation, and conclusion. Validation data was used source, triangulation method and triangulation data.
The result of research get important themes, namely: Inadequate Human Resources (lack of 2 special staffs) and has not been according to basic knowledge (no one was sanitation and environmental health, planning of management to management elements and management functions). IPAL has not been carried out in all and organizing at Wastewater Treatment Plants has not implemented. So, there is duplicate work causes a loss of less optimal. It is recommended that wastewater management should be carried out by managing the elements of management and management functions. In order for management of wastewater is organized and be better.
Penerapan Metode Six Sigma Dalam Perbaikan Kualitas Kampas (Lining) Produk Brake Shoe Pada PT X
Authors: Ekawati Yurida , Shagan Olivia 
Published: January 2022

Salah satu tujuan jangka pendek PT X adalah mampu meminimalkan defect pada produk brake shoe. Selama berjalannya proses produksi, part brake shoe yang menghasilkan kecacatan terbesar adalah kampas (lining). Padahal kualitas kampas berpengaruh langsung terhadap kualitas pengereman mobil. Penelitian ini menggunakan metode Six Sigma dengan tahapan DMAIC, untuk mengidentifikasi defect pada kampas serta mengurangi variansi dalam proses. Dua CTQ terbesar kecacatan kampas adalah kampas miring dan kampas keropos. Persentase muncul cacat tersebut sebesar 70,41% dari total kampas cacat. Kedua jenis kecacatan ini muncul secara signifikan disebabkan karena terdapat kerak pada permukaan matras cetakan (krom) yang digunakan pada proses hidrolis. Analisis improvement yang diterapkan adalah melakukan upaya preventive maintenance, yaitu membersihkan permukaan matras secara berkala dengan periode waktu setiap 5 kali cetak kampas. Setelah diterapkannya usulan perbaikan, diperoleh peningkatan level sigma dari 3,629 sigma menjadi 3,976 sigma. Usulan perbaikan ini juga terbukti efektif mampu mengurangi 2 jenis cacat terbanyak pada kampas yaitu kampas miring dan keropos. Pencapaian peningkatan level sigma ini dipertahankan dengan menerapkan pemberian insentif kepada operator hidrolis apabila mampu menghasilkan kampas cacat di bawah standar yang telah dibuat.

Kata kunci: DMAIC; DPMO; preventive maintenance; Six Sigma
THE INFLUENCE OF FUNGI CONTAMINATION ON THE AVIATION FUEL AND BIOCIDE INHIBITOR
Authors: Fierdaus Mochammad , Kussuryani Yannie 
Published: January 2022

Aviation fuel is one of the fractions of fuel oil containing hydrocarbons and trace materials in the form of organic salts. Distribution of aviation fuel to the aircraft allows the aviation fuel contaminated by water due to condensation. The presence of water, hydrocarbons and organic compounds are appropriate conditions for microbial growth. The growth of microbes among other fungi generates biomass that sould can be able block fi lter between fuel tank in aircraft to the engine and have fatal consequences for flight operation. An efforts to prevent the growth of fungi is to add biocides in aviation fuel, which is in this study using formalin. Fungi was used in this experiments consists of four species which were dominant in the aviation fuel that are: Paecilomyces sp.1, Paecilomyces sp.2, Aspergillus sp., Scytalidium sp., as will as a the of mixed cultures of four species of fungus. The concentration of formalin is used as biocide were 150 ppm, 250 ppm and 500 ppm. Parameter measured are dry weight of fungi and physical characteristic of aviation fuel including specific gravity, smoke point, freezing point, copper strip corrosion and flash point. Experiment result showed that the addition of formalin could prevent the growth of fungi in aviation fuel. For Paecilomyces sp.1 and Paecilomyces sp.2, formalin concentration of 150 ppm can prevent fungi growth in aviation fuel signifi cantly. It takes 500 ppm for Aspergillus sp. and 250 ppm for Scytalidium sp. The concentration of formalin 250 ppm and 500 ppm were inhibit the growth of mixed culture. Analysis of the physical properties of aviation fuel, showed that the use of formalin does not affect the quality of aviation fuel in all parameters tested and they meet the quality standards of aviation fuel issued by Ministry of Defence. This means that formalin can be used as biocide for aviation fuel.
BIODEGRADATION ENHANCEMENT OF OILY WASTEWATER BY OZONATION METHOD
Authors: Syafrizal Syafrizal , Zulkifliani Zulkifliani , Pratama Fami Adetyas Maulana , Bismo Setijo 
Published: January 2022

This research is aimed at improving the ability of oily wastewater biodegradation through the ozonation method, where ozone will oxidize organic compounds in the oily wastewater that are diffi cult to be degraded by bacteria so that the structure becomes simpler. The ozonation process is done by using a corona-discharge ozonator and semi-batch reactor, and the process is varied by ozone dose and pH value. The ozonation process is then followed by a biodegradation process, where the bacteria that is used is Pseudomonas sp. This study also observed the effect of surfactants in supporting the biodegradation processes. An indicator of research success is the increase in the biodegradation percentage of the sample, followed by an increase in the value of the constant rate of bacterial growth. The research results shows that the ozonation method and the use of surfactant can support the oily wastewater biodegradation process. This is shown by the value of the biodegradation percentage and the constant rate of bacterial growth results, in which respective values are able to reach 86,787% and 0,339 at the optimal operating conditions (ozone dose of 0.53 g/h; pH 7; Bios-H surfactant concentration 500 ppm).
PEPTIDE SURFACTANT FOR EOR APPLICATION
Authors: Usman Usman 
Published: January 2022

Motivated by recent advances on the peptides surfactants that capable of forming emulsion stabilization by lowering the interfacial tension, an extensive set of tests were carried out to further investigate the applicability of peptide molecules for enhanced oil recovery application. A designed peptide surfactant using protein biotechnology approach was laboratory tested at three samples representing the different oil characteristics, water formation, and reservoir rock. The best performance of peptide surfactant obtained is of sample A. Peptide surfactant is able to form microemulsion Type III at pH 11. It can lower the interfacial tension value until the range of 10-2 dyne/cm at 25°C, even though itsn’t reached the desired target yet which is 10-3 dyne/cm or even less. It can also change rock wettability from water wet into strong water wet. Sample A has relatively short hydrocarbon chain compared to samples B and C, it is classifi ed as intermediate oil, medium salinity for water formation, and rock mineral is dominated with quartz without gypsum that is very harmful to the fuction of surfactant. The developed peptide surfactant hasn’t been stable at high temperature yet. When tested at 70°C, the interfacial tension value increase to around 10-1 dyne/cm. Displacement effi ciency using oil sample A is less than 1%. Based on these results, the next peptide surfactant design will be focused on resistance capability improvement to temperature and peptide amino acid structure position to produce the better result of surfactant. The performance test results of peptide surfactant presented in this paper is valuable in designing specifi c peptide surfactant for certain oil fi eld.
OPTIMIZATION OF MEASUREMENT SPEED FOR SPECTRAL GAMMA RAY AND CLAY MINERAL IDENTIFICATION
Authors: Tribuana Irawan Y. , Yogi Ade , Prabowo Prabowo , Wibowo Andy S. , Sudija Puteri , Durahman Yudhi 
Published: January 2022

Gamma ray log is a logging tool to capture the radioactive level of a rock or formation measured in API units. This logging tool generally has a capability to differentiate between permeable and impermeable layers. Usually the impermeable layer tends to have higher radioactivity compared to the permeable one except for the feldspar bearing formation. In addition, another capability of this logging tool is to determine the kind of clay mineral, by using ratio data between Thorium and Potassium. This laboratory experiment used Spectral Gamma Ray (SGR) equipment at LEMIGAS Routine Core Laboratory. The quality of gamma ray log measurement is significantly affected by the speed of the conveyor belt. During the experiment, the measurement speed of 30 m/hour is the optimum speed to achieve good quality data and time efficiency with the data amount of 169 points/meter. The result of SGR measurement gives the reading on the content of Uranium, Thorium and Potassium. The Thorium and Potassium content are compared and plotted in Quirein graphic which was modified by Schlumberger in 1985. Using this crossplot, we can identify the presence of Chlorite, Montmorillonite, Kaolinite, Illite, mixed layer Feldspar, Mica, and Glauconite minerals. A case study conducted on Wells A1, A2, A3 and A4, indicated that the result of this crossplot were similar to the measurement using XRD.
HYDROCARBON SHALE POTENTIAL IN TALANG AKAR AND LAHAT FORMATIONS ON SOUTH AND CENTRAL PALEMBANG SUB BASIN
Authors: Julikah Julikah , Sriwidjaya Sriwidjaya , Hadimuljono Jonathan Setyoko , Panuju Panuju 
Published: January 2022

South and Central Palembang Sub - basin over Talang Akar (TAF) and the Lemat/Lahat Formations (LEF/LAF) has shale hydrocarbons (HC shale) which are considerably promising. Seismic interpretation results shows potential HC shale scattered in several areas around the Rukam-1, Kemang-1, Lion-1 and Tepus-1 wells. Generally, thermal modeling results indicates early maturity of oil on the value of Ro = 0.6% at about 2000 m depth (h), the formation of oil on the value Ro = (0.7-0.9)% at between (2200 £ h 3100) m depth and formation of gas at Ro values between (0.9-1.2)% at a depth between (3100-3500)m. Talang Akar and Lahat/Lemat Formations have a shallow marine depositional environment with Type II/III kerogen and lacustrine with Type III kerogen. Based on advanced seismic data processing (a method of seismic attributes and spectral decomposition) these areas are expected to have a TOC2% value that qualifies as shale HC. The assessment (P-50) of potential non-conventional oil and gas resources at Talang Akar and Lahat/Lemat Formations is estimated to be fairly large (up to 4200 MMBOE).
PERMO-TRIASSIC PALYNOLOGY OF THE WEST TIMOR
Authors: Lelono Eko Budi , Nugrahaningsih L. , Kurniadi Dedi 
Published: January 2022

Fifteen surface samples were examined to analyze palynology of the Permo-Triassic sediments of West Timor. The studied samples were collected from the clastic sediment of Bisane Formation which is considered to be the oldest formation. It derives from the Australian continent (Gondwana) following thecollision with the Banda volcanic arc. The Bisane Formation generally comprises thick calcareous sandstone (0.3-5 meters) with shale alternation and abundant marine microfossil of Chrinoid. The appearance of Chrinoid may indicate Permian age and shallow marine environment. Meanwhile, other Bisane sediment shows different lithology in which it is composed of the intercalation of non-calacreous, dark gray to black shale and siltstone showing papery structure and rich in sulphur. Generally, palynological assemblage of the studied samples characterises Permo-Triassic age as indicated by the existence of common striate-bisaccate pollen including Protohaploxypinus samoilovichii, P. fuscus, P. goraiensis, Striatopodocarpidites phaleratus, Pinuspollenites globosaccus and Lunatisporites pellucidus. However, the appearance of trilete-monosaccate spores of Plicatipollenites malabarensis and Cannanoropollis janakii within the non-calcareous shale samples de􀂿 nes the age as Permian or older for these samples. Interestingly, marine dino􀃀 agellates appear to mark calcareous samples suggesting the in􀃀 uence of a marine environment. They disappear from the non-calcareous samples indicating a freshwater environment. By integrating this palynological analysis and Permian tectonic event which is marked by rifting, it can be interpreted that the non-calcareous samples were formed during early syn-rift as evidenced by the occurrence of freshwater deposit (may be lacustrine). Subsequently, following sea level rises during post rift, the depositional environment shifted to shallow marine as indicated by the existence of calcareous Permo-Triassic samples. If this is the case, the appearance of Permo-Triassic sediments provides an opportunity to 􀂿 nd a new petroleum system in the Paleozoic series of West Timor. Source rock is represented by black shale, whereas reservoir is represented by thick sandstone.
Paradigma Sociocultural en Educación
Authors: Ramírez Trejo Denisse Alejandra 
Published: January 2022

La psicología de la educación es una disciplina científica que permite comprender los constructos de los elementos y figuras educativas como la enseñanza, el aprendizaje, el profesor, el alumno y la evaluación, con la finalidad de ejercer la práctica docente con fundamento teórico y metodológico.
En el presente trabajo se describe la propuesta de L. S. Vygotsky en el año 1920 para concebir al proceso de enseñanza y aprendizaje desde el enfoque sociocultural.
Vacunas COVID
Authors: Trejo Cruz Itzel , Cardón-Moreno Marisol , García-Rodríguez Jesús A. , Trejo-Roberto Erick 
Published: January 2022

Durante años, el hombre se ha visto obligado a buscar alternativas para resistir las infecciones, por ello se implementaron medidas de salud pública, las cuales han tenido un gran impacto en la salud de la humanidad a lo largo del tiempo. Una vacuna es en definitiva un preparado de patógenos, que pueden estar debilitados o muertos, y esto, se puede aplicar a personas sanas para provocar una respuesta inmunológica; y de esta forma actué protegiendo al organismo frente a agentes infecciosos y así evitar contagios o enfermedades.
El objetivo principal de la vacuna contra COVID-19 es erradicar la enfermedad y proporcionar inmunidad ante este virus de esta manera reducir la mortalidad y los contagios causados por el mismo.
Comportamiento del consumidor
Authors: Ramírez Sánchez Guadalupe Sarai , Ortiz Gonzalez Heber Jared , García Cruz Kenia Esmeralda 
Published: January 2022

En este trabajo vamos a ver de los factores más relevantes en el área de la mercadotecnia, concentrándonos específicamente en el tema del comportamiento del consumidor y de cuáles son los factores que más influyen para que este se lleve a cabo, al igual de algunos aspectos a considerar para unos excelentes resultados en la organización y/o empresa.
Evolución de la carga de la diabetes en México
Authors: Santillán-Hernández Alma Sofía , Suárez-Reyes Evelyn Magali , Ávila-Pozos Roberto 
Published: January 2022

En este trabajo se presenta un estudio sobre la carga de la diabetes en la población mexicana entre los años 2004 y 2014.
Se estiman tasas de años de vida saludables perdidos por género, entidad federativa y edad, utilizando el peso de la discapacidad ocasionada por complicaciones. Los resultados muestran que la tasa de años de vida saludable perdidos para las mujeres se redujo en 13% y para los hombres aumentó en 5%, entre 2004 y 2014. Para las personas con diabetes que no reportaron complicaciones, los años de vida saludable perdidos se incrementaron en este mismo período. Para el año 2014, los estados del centro del país pasaron de un nivel bajo a un nivel medio-alto en las tasas de años de vida saludable perdidos, respecto al año 2004.
Con estos resultados, concluimos que es necesario tener más y mejor información para el buen seguimiento de la población con enfermedades crónicas como la diabetes.