bluuebunny/crossref_metadata_2025_split huggingface dataset:
Learning with the Social Media Assisted Science, Technology and Society Approach to Improve Self-Learning Motivation
Authors: Maulana Avid Wahyu , Wilujeng Insih , Kuswanto Heru 
Published: June 2019

Abstract
Physics learning needs change to follow this era and motivate students to learn. The use of a combination of daily physics phenomena and the internet in learning can be a better solution to follow the recent era and motivate students. The method used in this study is research and development (R & D). Product of the development is learning media with Social Media Assisted Science Technology and Society (STS) Approach. The subjects of this study were students of SMAN 1 Kalasan Sleman Yogyakarta. This paper uses an independent learning motivation questionnaire instrument to obtain data. Analysis shows that the use of motivational learning media increases in good categories. The results of this study are the use of media using the social media assisted STS approach can increase the motivation of independent learning.
Enhancing Students’ Critical Thinking Skills through Physics Education Technology Simulation Assisted of Scaffolding Approach
Authors: Ferty Zera Nadiah , Wilujeng Insih , Jumadi  , Kuswanto Heru 
Published: June 2019

Abstract
This study aims to improve students critical thinking skills through Physics Education Technology Simulation assisted of Scaffolding approach. The study used the single pretest posttest group model (One Group Pretest Posttest) in one study class. Statistical test using paired sample t- test. The results of increased critical thinking skills were obtained based on percentage pretest and posttest results with descriptive analysis through criteria of critical thinking skills. Based on the result of t-test, the value of significance is 0.00, which is less than α (0.05) which means there is improvement of critical thinking skills through Physics Education Technology Simulation assisted of Scaffolding approach. The percentage of pretest value of 71% with good category and the percentage of Post-test score of 82% with very good category.
Physical Reasoning Ability Development of High School Students
Authors: Suhariyono  , Mardapi Djemari 
Published: June 2019

Abstract
This study has purpose to reveal: (1) the characteristics of physics subject test of high school students of grade X and XI, (2) the equality of vertical test of physics subject of high school students of grade X and XI, (3) the development of the ability of high school students of grade X to grade XI physics subject. The data which was in the form of scores were then processed and synchronized by using a common item non-equivalent groups design by the method of equalizing of mean and sigma based on the Rasch model. The results of this study are: (1) the validity of the physics subjects test of grade X is 0.92 and grade XI is 0.96 (2) the reliability tests is 0.928 for grade X and 0.926 for grade XI; (3) the results of the vertical equalization based on the approach of Rasch model showed the conversion equation for grade X to grade XI was b * = bx - 0.36; (4) there is a development of the ability of grade X students to grade XI students or the ability of grade XI students is higher than the ability of grade X students.
Using Socio-scientific Issues in Problem Based Learning to Enhance Science Literacy
Authors: Rubini Bibin , Ardianto D. , Setyaningsih S. , Sariningrum A. 
Published: June 2019

Abstract
Context issue in science learning can be referred as one of the solutions to improve students’ science literacy e.g. the socio-scientific issues. The socio-scientific context is presented in a problem where scientific knowledge and social awareness arise in mental conflicts that require science literacy to make responsible decisions. In addition, using problems in learning can provide opportunities for students to apply their knowledge in solving problems. Therefore, this paper discusses the usage of socio-scientific context in problem based learning to enhance students’ science literacy. We show that problem-based learning with the socio-scientific issue can improve students’ science literacy. Using socio-scientific issue makes it easier for students to make explanations of scientific phenomena.
Multimedia in Disaster Risk Reduction
Authors: Sejati Prajana Marwan , Budiningsih C. A. , Pujianto  
Published: June 2019

Abstract
This research aims to find out the comprehension in disaster risk reduction for students of Class IV and analysis the needs of learning media to improve the comprehension in disaster risk reduction. This research applies survey method. Subjects used in this research are teachers and students of Class IV at Sekolah Siaga Bencana in Cangkringan District, Sleman, Yogyakarta, Indonesia. Interview, test, questionnaire, and literature review are used for the data collecting techniques. The research results present that comprehension of the material of Disaster Risk Reduction of elementary Class IV has note fully well. The data presents: 63.09% - poor, 12.02% - pretty good, 18.45% - good, and 6.44% - very good. The research results that the attractive learning media are needed to improve the student’s comprehension. Multimedia is a kind of learning media, which has interactive space between the users and media. Through multimedia, students will learn the concept and strategy to reduce geological disaster risk. Therefore, applying multimedia in learning process has a potency to improve the comprehension of the reduction of disaster risk for students.
Development Student Activity Sheet of Natural Sciences with Authentic Inquiry Learning Approach to Improve Problemsolving Skills of Junior High School Students
Authors: Mouromadhoni Kasyfi Rifqi , Prasetyo Zuhdan Kun , Atun Sri 
Published: June 2019

Abstract
This study aims to determine the feasibility of the Student Activity Sheet with authentic inquiry learning approach based on the results of the expert judgment assessment and also the students’ responses as well as to determine the improvement of problem-solving skills. This research is a development research (R&D) with a 4-D (four-D) model. The stages of this research included to define, design and develop. Research subjects were the experts, science teachers, and students of class VIII B of SMPN 14 Yogyakarta. The research instruments used were the Student Activity Sheet of expert and teacher validation instrument, students’ responses instrument, problem-solving skills observation sheets, and problem-solving skills pretest-posttest. The analytical techniques used included the average score to determine the actual score, the conversion of scores into four categories, the calculation of the percentage of mastery of problem-solving skills and the gain score of the mastery of problem-solving skills. Furthermore, the Student Activity Sheet was developed and considered very good by experts and teachers as well as suitable for use in natural sciences learning. (2) The students gave very good responses to the Natural Sciences Subject Student Activity Sheet with authentic inquiry learning approach from the results of development, (3) the improvement of students’ problem-solving skills in Natural Sciences learning with authentic inquiry learning gained an increase of 17.8% and the gain score of 0.74 which is included in the “high” category.
Design of a PID control for a prototype of an automated GMAW welding bench
Authors: Trigos A E , Garcia-Guarin J , Espinel Blanco E E 
Published: June 2019

Abstract
This article describes parameters such as electrical currents, equipment voltage, separation distance between the welding gun and the piece to be welded, the electrode diameter, material thickness, and the travel speed of the welding application performed through the gas metal arc welding process. This is the main parameter for the automation of the process, To evaluate this parameter, a prototype of an automated gas metal arc welding bench was constructed, which consists of a mobile work table that secures the piece to be welded, and a structure that holds the welding gun in a fixed position, allowing during the welding the movement of the piece automatically at a speed estimated by the user. For this, ultrasound and speed sensors were used, together with the Labview-Arduino automation programs that simulate horizontal welding and finally, two proportional–integral–derivative calculation methods are compared: 1) Mathematical model of the system and 2) Calculation of the model of the plant based on actual data input voltage vs output speed. Unraveling with greater approximation the adjustment of parameters (Kc, Ti, Td), which allow for a speed designated by the operator, keeping stable the welding speed used in the gas metal Arc welding processes with respect to the piece to be welded.
Development of a prototype to monitor the temperature and pH in the fish farm at Francisco de Paula Santander Ocaña University
Authors: Sánchez Torres B , Rosado Gómez A A 
Published: June 2019

Abstract
In this document, the results of the development of a prototype for temperature and pH monitoring in the fish farm of the Francisco de Paula Santander University, Ocaña, is detailed, in order to provide an improvement to the processes related to the care of the environment of the fish in the fish farm, for this purpose, the Internet of Things is used, focused on agriculture, this has methodologies, materials and technologies that are analyzed in this document to select the most suitable for the development of the prototype and the points to consider for its implementation. Given that the application of a system focused on the problem expressed in the document can improve the quality of life of the fish not without first solving problems surrounding the internet of things focused on agriculture, as they are the power supply in rural areas and the creation of devices resistant to natural environments.
Model-based approach for agile requirements engineering using SysML and Papyrus
Authors: Cuesta B 
Published: June 2019

Abstract
This paper presents a model for the application of agile requirements engineering. The literature review made it possible to identify the requirements elicitation process based on standards such as capability maturity model integration, software engineering body of Knowledge and how their practices can complement those of agile methodologies, to reduce risk factors and guarantee the success of software projects. This process gives importance to the continuous communication with stakeholders in an iterative process, which is maintained throughout the project and begins with the identification of the problem domain, and then gradually refining characteristics and objectives in user stories and it ends with the development of the product backlog, which will serve as input to the application agile development process. The results propose a model, indicating the different stages for requirements engineering using the agile systems modeling language and the Papyrus tool.
Energetic analysis in traditional panelers burners
Authors: Garcia-Rincón J G , Guerrero Gómez G , Barrientos E 
Published: June 2019

Abstract
In North of Santander, panela production is carried out in traditional burners, where bagasse is used as fuel. This rudimentary and artisanal form is inefficient in energy terms. For the present study, three burner samples were selected, determining the biomass consumption and the energy assesment of the panela production process, for developing this, a virtual instrument was designed using the Lab View software with temperature sensors and data acquisition cards, which allowed the monitoring and recording of temperatures, finally the energy efficiency of each burner was evaluated.
Biodigestion: Alternative use of vegetable matter for obtaining biofuel in the province of Ocaña, Colombia
Authors: Valdes Solano D M , Alba Maldonado J M , Arenas A Armesto 
Published: June 2019

AbstractThe Catatumbo region offers a great variety of agricultural products on demand in the urban centers of the department of North Santander. Since in this locality there is no management or use for vegetable material wastes this study focused on the public market, represented by a wholesale and retail trade in agricultural products, the most representative being tomatoes and onions. This research prospects the potential for biodigesters as an alternative, based on anaerobic digestion for the production of bioethanol from lignocellulosic biomass from vegetable species of the Catatumbo region. An assessment of possible raw materials that exist within the region was carried out, determining operating conditions and estimative production of bioethanol.
Flame structure of dimethyl ether/O2/Ar mixture at 1 atm
Authors: Alyanova N , Bolshova T , Dmitriev A , Shvartsberg V , Knyazkov D , Shmakov A , Korobeinichev O 
Published: June 2019

Abstract
For diesel engines, dimethyl ether (DME) is widely used in the world, it is a perspective candidate to replace traditional diesel in the future. The consumption of DME as a motor fuel is constantly increasing. DME has a very low propensity to soot formation during combustion, which allows not only to reduce harmful emissions into the atmosphere, but also to improve the completeness of combustion. To validate available chemical kinetic models for DME combustion, in this work we report our experimental data on the chemical structure of a laminar premixed stoichiometric DME/O2/Ar flame stabilized at 1 atm on a flat burner. Flame sampling molecular beam-mass spectrometry is used to obtain spatial distribution of mole fractions of many species in the flame. The experimental data are compared with the calculation results obtained using PREMIX code and two detailed chemical kinetic mechanisms available from literature for DME combustion.
Behavior of Eu, Pu, U in utilization of radioactive graphite by ignition method in oxygen
Authors: Barbin N M , Kolbin T.S. , Terentyev D I , Alekseev S G 
Published: June 2019

Abstract
The behavior of some radionuclides (U, Eu, Pu) in the utilization of radioactive graphite by the combustion method in oxygen is considered. The study was carried out by thermodynamic modeling in the temperature range 300-3300 K. The main physicochemical processes occurring during oxidation were established.
Efficiency of technology of mechanically activated coal for ignition and lighting of pulverized coal boilers
Authors: Chernova G V , Burdukov A P , Butakov E B 
Published: June 2019

Abstract
To increase the energy efficiency of coal flaring, a technology with mechanochemical activation of coal by the mills is being developed at the Institute of Thermophysics SB RAS. The technology is aimed at increasing coal reactivity and can be used to replace high-reactive expensive and difficult-to-obtain fuel oil for ignition and lighting of pulverized coal boilers of thermal power plants (TPP) using mechanically activated microground coal. A technique for assessing the technical and economic efficiency of using the technology of mechanically activated microground coal is suggested. The investment attractiveness of replacing fuel oil ignition and lighting with mechanically activated microground coal on a number of pulverized coal boilers of thermal power plants of Siberia is presented.
Pulverized coal torch combustion in a furnace
Authors: Gorelikov E Y , Litvinov I V , Styuf A S , Shtork S I 
Published: June 2019

Abstract
Aerodynamics of flame combustion of a pulverized coal was studied experimentally using a laboratory setup with a thermal power of 25 kW. The axial and tangential velocity profiles were measured with the co-and counter-swirl of the first and second degrees of the burner. Averaged velocity profiles were measured by a two-component LDA system. The temperature was also measured on the walls and axis of sections of the pulverized coal burner. The temperature distributions were obtained at different coal dust flow rates as well as at co-and counter-swirl. The results obtained allow us to conclude about the efficiency of flow mixing at pulverized coal combustion.
Investigation of the dependence of the process of spontaneous combustion on the particle size of brown coal processing products
Authors: Kuznetsov Viktor , Goryunov Yury , Demenchuk Sergey , Magdeeva Olga , Neobyavlyayushchiy Pavel , Dekterev Alexandr 
Published: June 2019

Abstract
The paper presents the results of a study of the process of spontaneous combustion of partially carbonized lignite and sorbent from coal, depending on the particle size. To determine the critical conditions of spontaneous combustion and the effective kinetic parameters of the process proceeding along the thermal mechanism, a special experimental setup was used. The results of the study indicate the influence of particle size on the time of spontaneous combustion and on the rate of oxidation of coal matter. A mathematical model of spontaneous combustion of coal matter is developed. The model uses the spatial nonstationary heat conduction equation, in which the heat release in the process of coal oxidation is taken into account by setting a heat source based on the experimentally obtained kinetic parameters of the spontaneous combustion process - effective activation energy and the pre-exponential factor.
Optimisation of combustion process in furnace of coal-fired boiler PK-38 using Computational Fluid Dynamics
Authors: Orlik E.V. , Mezhov E.A. , Tsepenok A.I. , Kvrivishvili A.R. 
Published: June 2019

Abstract
In 2016 and 2017, AO Machine Building Factory of Podolsk jointly with OOO ZiO-COTES realised the projects for the retrofit of boilers PK-38 Nos.3A, 4B at the Nazarovo GRES power plant. A range of implemented technical solutions [1] allowed reach stable continuous operation of boiler PK-38 at the Nazarovo GRES at loads as high as 270 t/h and significantly reduced nitrogen oxide emissions. Development of the burners system and combustion modes, as well as estimation of nitrogen oxides emissions has been performed using three-dimensional computational fluid dynamics modelling.
Household, community, sub-national and country-level predictors of primary cooking fuel switching in nine countries from the PURE study
Authors: Shupler Matthew , Hystad Perry , Gustafson Paul , Rangarajan Sumathy , Mushtaha Maha , Jayachtria K G , Mony Prem K , Mohan Deepa , Kumar Parthiban , PVM Lakshmi , Sagar Vivek , Gupta Rajeev , Mohan Indu , Nair Sanjeev , Varma Ravi Prasad , Li Wei , Hu Bo , You Kai , Ncube Tatenda , Ncube Brian , Chifamba Jephat , West Nicola , Yeates Karen , Iqbal Romaina , Khawaja Rehman , Yusuf Rita , Khan Afreen , Seron Pamela , Lanas Fernando , Lopez-Jaramillo Patricio , Camacho Paul A , Puoane Thandi , Yusuf Salim , Brauer Michael 
Published: June 2019

Abstract

Introduction. Switching from polluting (e.g. wood, crop waste, coal) to clean (e.g. gas, electricity) cooking fuels can reduce household air pollution exposures and climate-forcing emissions. While studies have evaluated specific interventions and assessed fuel-switching in repeated cross-sectional surveys, the role of different multilevel factors in household fuel switching, outside of interventions and across diverse community settings, is not well understood. Methods. We examined longitudinal survey data from 24 172 households in 177 rural communities across nine countries within the Prospective Urban and Rural Epidemiology study. We assessed household-level primary cooking fuel switching during a median of 10 years of follow up (∼2005–2015). We used hierarchical logistic regression models to examine the relative importance of household, community, sub-national and national-level factors contributing to primary fuel switching. Results. One-half of study households (12 369) reported changing their primary cooking fuels between baseline and follow up surveys. Of these, 61% (7582) switched from polluting (wood, dung, agricultural waste, charcoal, coal, kerosene) to clean (gas, electricity) fuels, 26% (3109) switched between different polluting fuels, 10% (1164) switched from clean to polluting fuels and 3% (522) switched between different clean fuels. Among the 17 830 households using polluting cooking fuels at baseline, household-level factors (e.g. larger household size, higher wealth, higher education level) were most strongly associated with switching from polluting to clean fuels in India; in all other countries, community-level factors (e.g. larger population density in 2010, larger increase in population density between 2005 and 2015) were the strongest predictors of polluting-to-clean fuel switching. Conclusions. The importance of community and sub-national factors relative to household characteristics in determining polluting-to-clean fuel switching varied dramatically across the nine countries examined. This highlights the potential importance of national and other contextual factors in shaping large-scale clean cooking transitions among rural communities in low- and middle-income countries.
Tackling Environmental Pollution through Participatory Approach in Nambo, South Tangerang, Indonesia
Authors: Dewi OC , Atmoko TU , Alrasyid HA , Priyandana D , Dewi MBV , Siska D 
Published: June 2019

Abstract
A participatory approach is well-known for its time-consuming and no-instant approach. Tackling environmental pollution directly from its source in an urban area by participatory approach is very critical. Universitas Indonesia’s Community Engagement Program together with the City Without Slum or Kotaku Program in South Tangerang City, Banten Province, Indonesia, conducted in Kampung Nambo. This joint program carried out in two lines through the local government and the community by a bottom-up approach. The inhabitants of the neighbourhood involved through a charrette process. The outcome of the charrette is the guideline of the new master plan development of Kampung Nambo that responding to tackling the pollution created in the kampung. This master plan will use as a parameter for the Kampung Nambo development program. A team of experts that consists of the local government, the university scholars, the NGO, and the inhabitants joined together for the implementation plan under the intensive and an interactive designated workshop. It concluded that this approach is valuable to integrate the unplanned urban areas development, which happened quite vast in some Indonesian cities and towns. Thus, it helps to reduce the urgency of environmental degradation in the kampung, through awareness and educational campaign. This approach is challenging yet it is a long-term investment.
Constructing a Framework for Economic Value of Urban Renewal in Taiwan
Authors: Hsu Kuo-Wei , Chao Jen-Chih 
Published: June 2019

Abstract
Following a phase of early prosperity, Taiwan’s urban centers have slowly declined, resulting in the hollowing-out of business districts and declining populations, and prompting widespread interest in urban redevelopment. To improve the quality of urban environments, not least in terms of disaster prevention, the central government’s urban-renewal policy is aimed at re-inspiring local development via the introduction of funds and dynamism from the private sector. However, progress has been slow because potential private-sector partners tend to measure projects’ merit and performance chiefly in financial terms, and the economic value of urban renewal remains notoriously difficult to quantify. Accordingly, this study proposes a complete economic-value framework for urban renewal in Taiwan through secondary-data methods. Specifically, this framework consists of three facets and six factors, of which the land-use value facet (comprising the land and real-estate value factors) relates to the strength of the local economy; the energy-conservation value facet’s two factors are energy-use and carbon-emissions reductions; and the disaster-prevention value facet consists of reducing the likelihood of disasters, and reducing their impact.