bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Science Students Critical Thinking Skill in Junior High School
Authors: Purwanto Yohanes Prian Budi , Masykuri Mohammad , Soeparmi  , Elisanti Evi 
Published: June 2019

Abstract
This study aims to determine the analysis of critical thinking skills of junior high school students in science lessons. This study uses descriptive qualitative research to analyze the results of tests of students of critical thinking skills of seventh-grade students in one of the junior high schools in Sukoharjo Regency, Indonesia. The method used is survey research with samples determined by purposive sampling technique. Subjects of the study sample consisted of 240 students of class VII Junior High School 2018/2019 academic year. The instrument used is a test of critical thinking skills that are adapted to aspects of critical thinking skills according to Facione. The question consists of 6 test items that have been developed by researchers and validated by experts. The results showed that critical thinking skills in every aspect were still in the low category. The results of the acquisition of each aspect of critical thinking skills are interpretation aspects by 33.84%, aspects of analysis by 33.79%, aspects of evaluation by 32.00%, aspects of inference by 34.93%, aspects of explanation by 36.59%, aspects of self-regulation by 34.29%. This is the conclusion of the critical thinking skills of junior high school students in natural science subjects in the low category.
Developing Critical Thinking, Scientific Attitude, and Self-efficacy in Students through Project Based Learning and Authentic Assessment in Science Teaching at Junior High School
Authors: Wayan Suastra I , Ristiati Ni Putu 
Published: June 2019

Abstract
The aim of this study was to analyze the effect of Project Based Learning (PjBL) model on critical thinking, scientific attitude, and self-efficacy in students. This study used a quasi-experiment of pos-ttest only control group design. The subjects were 60 ninth grade students of public high schools in Singaraja in the academic year 2017/2018 selected randomly from the existing classes, in which 30 students were assigned to the experiment class and another 30 to the control class. The instruments used were critical thinking test, scientific attitude questionnaire, and self-efficacy questionnaire. The instruments had a high reliability. The data were analyzed descriptively and to test the hypothesis, MANOV with the 5% significance level was used. The result showed that simultaneously critical thinking, scientific thinking, scientific attitude, and self-efficacy of the students who learned with PjBL and authentic assessment significantly differed from those who learned with PjBl and conventional assessment (F=10.79; p<0.05). The group of students who learned with PjBL and authentic assessment had a high mean than that of those who learned with PjBL and conventional assessment. In other words, authentic assessment is effective in enhancing critical thinking, scientific attitude, and self-efficacy of the students in science teaching.
Development Model of Students’ Innert-Depend Strategies to Face Disruption Era Through Best Practice Film of Android Based Learning of Pancasila Character Value
Authors: Rosana Dadan , Setyawarno Didik , Setyaningsih Wita 
Published: June 2019

Abstract
The world of education is currently facing new challenges since it enters the industrial revolution era 4.0 in which the digital industry has become a paradigm and reference in the recent order of life. The Industrial Revolution 4.0 comes together with the disruption era of which new literacy incorporating data, technology literacy and human literacy. Data literacy is related to the ability to read, to analyze and to make conclusions based on obtained data and information (big data). Technology literacy emphasizes on the ability to understand the way of the working machine. It also includes technology applications and technology-based work to produce maximum results. Human literacy focuses on communication, collaboration, critical thinking, creative and innovative abilities. In case of human literacy, it is necessary to develop positive characters to equip Indonesian people with Pancasila character. The efforts to produce a generation that can compete in disruption era must be done in some integrated way with Innert-depend strategies to foster a holistic culture and community morality with the potential basis of the community including Pancasila character. This study aims at producing Innert-depend strategies development model through making best practice film of Android based learning of Pancasila characters. The research method was using Research and Development [1] with the 4-D (Four-D Models) modified by R & D form of [2]. Research procedure include Define phase; Design phase; Develop phase and Disseminate phase. The first stage was to produce film packages best practice of Android-based Pancasila character, the second stage was to produce students’ Innert-dependent strategies development model to face disruption era, and the third stage, the model has been disseminated in the student environment through intra-curricular and extracurricular. The results showed that there was an increase in Innert-depend strategies during the experimental class students and the standard gain average in the experimental class was in the "high" category which was significantly different from the control class with "medium" category. Based on these results, it can be concluded that the average innert-depend strategies test results and understanding of the experimental class concept were higher, both from the average score and the standard gain mean.
Megabiodiversity Utilization through Integrated Learning Model of Natural Sciences with Development of Innertdepend Strategies in Indonesian Border Areas
Authors: Sukardiyono  , Rosana Dadan 
Published: June 2019

AbstractThe community empowerment and development attempts in Indonesia border area must be carried out through integrated efforts to foster innertdepend strategies. The potential threat to the national sovereignty should be prioritized although it needs some great efforts. The risk of losing islands along the cross-border areas of country needs to be anticipated better and more professionally. One strategic step to deal with this case is optimizing educational institutions in the cross-border region. It can be realized by utilizing megabiodiversity as a source of natural science learning as well as instilling a national pride of having abundant natural resources in the archipelago. The next strategy is by incorporating innertdepend strategies for the students. The research design of this study is the type of "Prototypal Studies" as put forward by [1] and [2]. The important thing to be considered in the Research and Development model is the quality of the produced learning model (product). [2] provides product quality criteria, namely: valid (reflects state-of-the-art knowledge and internal consistency), added value, practical, and effective. The results of the study are; (1) integrated learning model of natural sciences with the development of innertdepend strategies by utilizing the megabiodiversity that has been tested for its feasibility through expert judgment and limited empirical trials in the partnership schools can be catagorized “Good”, (2) integrated learning model of natural science with innert depend strategies is effective to improve concepts understanding and innert-dependent strategies for students in border area schools.
Instrument Development in Measuring the Scientific Literacy Integrated Character Level of Junior High School Students
Authors: Jufri Abdul Wahab , Hakim Alifman , Ramdani Agus 
Published: June 2019

Abstract
The objectives of this study were to develop the scale called the student test of scientific literacy integrated character (SToSLiC), to analyze its validity and reliability, and to portray the primary profile of scientific literacy integrated character of junior high school students in Mataram. The scale was developed in four steps include identifying indicators, developing pool items, checking items validity and reliability, and improving items quality. The scale consists of two parts that are the SToSLiC-A and the SToSLiC-B. The primary pool items of the SToSLiC-A consist of 42 multiple choice items, and 40 Likert-scale items for the SToSLiC-B. The scale was administered to 222 eight graders student in Mataram city. Seven items were eliminated from the initial SToSLiC-A because of the item total correlation were < 0.05 or invalid. Based on item total correlation of the 35 remaining items, the SToSLiC-A was classified as valid (item total correlation coefficient > 0.05), and it has good internal consistency (Alpha-Cronbach coefficient of 0,63). All 40 items of the SToSLiC-B were valid (item total correlations > 0.05) with good internal consistency (Alpha-Cronbach coefficient of 0.87). Based on these values, it can be concluded that the SToSLiC developed in this study provide an objective measure of acquisition of scientific literacy and character of junior high school students.
Preparing the Next Generation Science Teacher: A Case in Applied Science Course
Authors: Yektyastuti Resti , Mawardini Annissa , Hartono Rudi 
Published: June 2019

Abstract
Our next generation will be facing a world full of challenges, different from ours. It is also a challenge for us to prepare them to face it. Especially in the field of science teaching, we are required to provide interesting learning method that meet the next generation needs. This paper provides an overview of the application of one of the learning methods to prepare the next generation science teachers. The learning is carried out in six main steps: introduction, enhancing the concept, forum group discussion I, applying the theory, forum group discussion II, and evaluation. The learning was conducted in applied science course in Department of Elementary School Teacher Education, University of Djuanda Bogor. Result showed that this method train student to be directly involved in solving various natural problems around them. This kind of learning is learning that is needed by the next generation students.
Bioengineering materials and techniques
Authors: Palmett-Plata O 
Published: June 2019

AbstractAlong this article it will deal with a subject that tends to be strengthened in our country, it is used in the recovery of unstable soils with erosion problems and strong signs of wear and loss of value. It is the subject of bioengineering its techniques and materials used. Bioengineering, also called Biological Engineering, is a discipline used in environmental regeneration interventions, using living materials (plants, trunks, seeds) alone or in combination with other inert materials of construction. Bioengineering allows the fulfillment of technical, ecological, socioeconomic and landscape objectives in the recovery of land with problems of erosion, instability, steep or moderate slopes, hillsides, basins or urban environments. Finally, the relationship between bioengineering and landscape has been strengthened, due to the magnificent results that its combination presents in the recovery not only of the soil, but also of the contribution to the quality of the landscape and its sustainability.
Technological innovation in the design process of an acoustic panel to the hospital environment
Authors: Gómez-Vélez P A , Rivera-Vega M P , Galeano-Upegui B J , Escobar-Mora N J 
Published: June 2019

Abstract
Acoustic pollution has become a global problem, but, having negative effects on the health and well-being of people, it becomes a variable to control in hospital environments. That is why this article presents the design of a panel with noise reduction properties and with characteristics that allow to replace the restrictions of the hospital environment, through the concepts of Home Warmth and Patient Safety as fundamental bases to limit the problem. The design exercise uses the VDI 2221 model and the problem / solution symmetry model in order to restrict the design and refine it without losing sight of the context for which the panel is designed. As a result, a design of the structure is obtained that later goes on to a stage of improvement of details, in which characteristics associated to the materials, production processes and other additional characteristics are defined.
Information security model. Case study higher education institution
Authors: Aguilar Quintero N A , Velásquez Pérez T , Castro Silva H F 
Published: June 2019

Abstract
The objective of this project is to design an information security model applicable to higher education institutions that allows effective control of their processes. The development of the project starts with the characterization of the different existing processes in the higher education institutions of the Norte de Santander, Colombia, it is compared with the standards or good practices of security of the existing information, which allows structuring the elements that make up the model of information security for higher education institutions and, finally, the validation of the model designed in a higher education institution.
Strategic planning model of information technology that allows alignment with the IT4+ model
Authors: Contreras Hernández L L , Velásquez Pérez T , Castro Silva H F 
Published: June 2019

AbstractThe constant growth of information technology. The new requirements and the need for companies to have quality Information Technology services make organizations worry about efficiently managing their resources, delivering and giving optimal support to information technology services. In this sense, the present descriptive quantitative research is aimed at designing a strategic information technology planning model for higher education institutions that allows the proposed IT4 + model to be aligned and validated by theMinisterio de Tecnologías de la Información y Comunicacionesin Colombia. Advanced in strategic planning of information technologies in each of the higher education institutions of Norte de Santander. The proposed model consists of six phases emphasizing the analysis of the current situation, in the information technology model and planning, focusing on the understanding of the business strategy, the use and appropriation of information technology that allows all processes to be supported from the strategic levels of business with information technologies. Finally, the validation of the model was carried out using the Dephi methodology.
Thermo-mechanical assessment in three auto-ventilated disc brake by implementing finite elements
Authors: García-León R A , Flórez-Solano E , Rodriguez-Castilla M 
Published: June 2019

Abstract
During the braking process of a vehicle, temperature rise caused by friction between the brake pads and the disc is not quickly dissipated. This depends on the disc’s geometrical features, cooling channels and manufacturing material. Therefore, when there comes a sudden braking, immense amounts of heat may build up in a brief time, which cause elevated temperature gradients to rise within the disc. Under these conditions, brake system’s functionality and safety might be jeopardized. The objective of present research seeks to simulate temperature performance and mechanical properties in three ventilated brake discs, through Finite Elements Analysis and by means of ANSYS Software and SolidWorks Simulation. Brakes temperature and geometrical structure was noted by using a specialized design software. Results and conclusion: The results obtained prove that discs can be effectively used at extreme work conditions, at a speed of 800 Km/h and at a 20 °C room temperature. However, it is important to select the right geometrical features, so heat loss process is efficient and higher safety standards are guaranteed, ever since maintenance and cleaning of all system’s components are adequately performed. It was found that brake systems efficiency evidently depended on discs geometrical features, work conditions in which they are operated and the distinct types of available brake discs, as it was proved through software-made simulations.
Permeable polymeric panels made from processed plastic
Authors: Jaramillo H Y 
Published: June 2019

Abstract
The construction industry has been constantly looking for new materials and systems that go hand in hand with the technical and economic environmental commitment. Currently, it is easy to find different proposals resulting from the recycling and re-signification of solid waste, as is the case of polymer materials, which form a large part of the city’s solid waste, which has generated that little by little the sustainable and environmental issue becomes part of the integral solution of the diverse construction projects. For this reason, this research proposes the creation of a panel composed of a recycled polymer matrix, articulated with each other and that can be used as a dividing element of architectural spaces. The elaboration of this panel is made from the reuse of plastic bottles of polyethylene terephthalate (PET), initially the different recycling companies in the region were identified, from which, the processed material was obtained and with the addition of the plastic resins in the laboratory, a compact and low density polymer matrix was obtained, with which test pieces were made and subjected to compression tests, reaching a maximum resistance of 4.3 and 36kN.
Numerical study of coal and woody biomass co-gasification in oxygen-fed gasifier
Authors: Donskoy I G , Kozlov A N , Svishchev D A , Shamanskiy V A 
Published: June 2019

Abstract
The use of biomass in the energy sector is associated with two important tasks: reducing the dependence of energy systems on expensive high-quality fuel, and increasing the environmental efficiency of thermal power plants (by processing carbon-containing waste and, in some cases, reducing harmful emissions). In addition to co-combusiton, other methods of fuels co-processing are possible, including co-gasification. The process of gasification of low-grade fuels can be unstable because of their low calorific value, often accompanied by the formation of tar products, so the addition of coal improves the efficiency of co-conversion. On the other hand, the high reactivity of biomass can contribute to the stabilization of combustion and gasification regimes of fuels with low-reactivity, such as coals with high degree of metamorphism or petcoke. In this paper, the process of pulverized fuel gasification is considered, and limitations on the efficiency associated with the melting of ash are investigated.
Benefits and risks of coal-fired power generation in Siberia in the frame of New industrial revolution and digital economy
Authors: Gorbacheva N V 
Published: June 2019

Abstract
New industrialization revolution correlates with new trend - digital economy, and these two novel phenomena will crucially transform society and economy in the XXI century. Power sector is a long-range engine of New industrial revolution and digital economy. Benefits and costs of coal-fired power generation, that is nowadays considered as old-fashioned, dirty and costly, should be transformed in the process of economic development of society to innovative, reliable and environmental-friendly source of electricity. Siberia as vast region of Russia from the Urals up to Pacific Ocean has posses a great energy, industrial and environmental capacity for implementing advantages of new trends. Siberia, in the distant future, cannot suffer a shortage in fossil fuels, especially in coal, which used to be cheap, abundant and transported by the developed energy infrastructure. Cross-disciplinary analysis of coal-fired power generation in Siberia is important for effective response of Russia to new global challenges.
Verification of the calculation modeling methods of the atomizing of a gas and gas-liquid stream from a pneumatic nozzle
Authors: Kuznetsov Viktor , Shebelev Aleksandr , Anufriev Igor , Shadrin Evgeniy , Minakov Andrey 
Published: June 2019

Abstract
The paper presents a verification of calculation modeling methods of atomizing of a gas and gas-liquid stream from a pneumatic nozzle based on the experimental data obtained in the IT SB RAS. Turbulent supersonic flow of compressible gas is considered here. Mathematical model includes description of gas phase motion based on the RANS (Reynolds Averaged Navier-Stokes) and URANS (Unsteady RANS) approach using two-parameter turbulence model k-ω SST and Reynolds Stress Model (RSM). The Lagrange method was used to model flow of water droplets. Dispersed phase is solved by tracking a large number of droplets through calculated flow field. Dispersed phase can exchange momentum, mass, and energy with fluid phase. Comparative analysis showed an acceptable qualitative and quantitative agreement between calculation and experiment, both for subsonic and supersonic flow.
Numerical modeling of steady and unsteady combustion regimes of methane-air mixture in research combustion chamber with step
Authors: Lebedev A B , Ya Yakubovskii K , Toktaliev P D 
Published: June 2019

Abstract
Numerical research of non-reactive and reactive flow in research combustion chamber with step are performed. Different approaches for inert and reactive flow modeling, RANS/DES/LES, are compared and validated on extensive experimental data, profiles of velocity and temperatures are among this data. Unsteady combustion phenomena, such as flashback and flamefront oscillations, are investigated and their quantitative characteristics for experimental conditions are determined. Main flow features, such as mixing layer in stabilization zone and induced by cooling system thermal boundary layer in post-combustion zone are extracted and analyzed, influence of this features on flow unsteadiness are considered.
The burning rate of coal-dust-air suspension
Authors: Moiseeva K M , Yu Krainov A 
Published: June 2019

Abstract
The paper provides the numerical investigation on the propagation of the coal dust-air combustion front. We determined the apparent and normal burning rate of the coal dust-air suspension depending on the size and mass concentration of coal dust and on the percentage of volatile components in coal dust particles. We also made an analysis on the influence of the percentage content of volatile components on the burning rate of the suspension with small and large particle radiuses.
The intensification of the solid fuel grate-firing process
Authors: Murko V , Baranova M , Grishina I 
Published: June 2019

Abstract
The results of a complex fuel additive tests - the intensifier of the combustion process on a coal boiler KV-r-11.63-115 - are presented. An increase in the efficiency of the boiler unit by 5.1% (abs) was recorded with a corresponding reduction in the consumption of conventional fuel for the generation of a unit of thermal energy.Application of the intensifier allowed to solve the problem of cleaning the waterfall tubes from the layer of annular deposits and to change the structure of the slag formed during the combustion of coal, which became more homogeneous and without the center of agglomeration.