bluuebunny/crossref_metadata_2025_split huggingface dataset:
Limited trial on origami construction as mathematics learning strategy for early childhood on kindergarten teachers
Authors: Respitawulan R , Afrianti N 
Published: November 2019

Abstract
The aim of this study is to do a limited trial on the hypothetical learning strategy for early childhood mathematics concepts using origami construction. Using the training devices designed for the limited trial, 17 early childhood education teachers in Bandung and its surrounding areas were trained on the learning strategy. The trial pre-test and post-test scores and it shows an improvement in the knowledge of participating teachers of early childhood mathematics learning using origami. The significance of the improvement had been proven using t-paired test. The improvement might be caused by the fact that most of the participants only have high school diploma as education background with lack of training on early childhood mathematics learning, and also with the fact that origami is mainly used for fine motor skills improvement in early childhood education. Thus, the origami construction can be used as an alternative strategy to learn mathematics concept in early childhood.
Lesson study: Increasing mathematical critical thinking ability?
Authors: Ferdianto F , Ningrum N B 
Published: November 2019

Abstract
The aims of this paper is determine the increase of students critical thinking ability in the material system of two-variable linear equations using the problem based learning model based on lesson study. This research is a quantitative with the method of analysis using the analysis of N-Gain test on the results of the student’s problem description test. The sample taken in this study is purposive sampling which is used only one class. The results showed that there was an increase in the critical thinking ability using the problem based learning model based on lesson study as seen from the increase in the average critical thinking ability test results of 0.70 and included in the high criteria.
Exploring the distribution of time to failure of bearing experimental data
Authors: Darwis S , Hajarisman N , Suliadi S , Widodo A 
Published: November 2019

Abstract
Bearing failure degradation describes the probability of failure after survive a length of time. This paper explores the empirical distribution of time to failure and modeling of bearing failure degradation using vibrational experimental data. Kurtosis was used as a feature of vibrational data. The failure probability was estimated using actuarial method. Fitting to some time to failure distributions and bearing failure degradation models will be discussed as an illustration of the proposed method. The results of the study can be used to predict the percentage bearing failures for a certain time of period. The results of the proposed method can contribute to maintenance system of a mechanical system
Mechanical properties and corrosion resistance of grinding ball Fe-xMn-10Al-1.25C alloys
Authors: Kartikasari R , Wijaya A E , Iskandar A D , Subardi S , Triyono T 
Published: November 2019

Abstract
This research aims to determine mechanical properties of grinding ball Fe-xMn-10Al- 1.25C alloys. The grinding ball alloys were prepared by an induction furnace under argon atmosphere. Al and C levels, 10% and 1.25% respectively, in Fe-Al-Mn grinding ball were kept constant while Mn content was varied by 15%, 20% and 25%. Grinding ball of Fe-Cr-C alloy as a comparison was obtained from the cement industry. Mechanical properties were investigated using tensile testing machine, Vickers hardness testing machine, Charpy impact test machine, and wear testing machine. Corrosion resistance was investigated using weight loss method. The results showed that the best mechanical properties occurred at 25% Mn composition, which were superior to Fe-Cr-C grinding ball. The ultimate tensile strength (UTS), yield strength, and elongation of Fe-xMn-10Al-1.25C grinding balls were in the range of 1215-1435 MPa, 927-1135 MPa, and 40.74-57.72% respectively. The hardness of these alloys was in the range of 421-550 VHN, the Charpy impact of these alloys was in the range of 1.24-1.55 J/mm2, while wear resistance of these alloys was in the range of 0.0004-0.0007 gr/s. The mechanical properties of Fe-Cr-C grinding ball were 1125 MPa (tensile strength), 875 MPa (yield strength), 47.8% (elongation), 544 VHN, 0.45J/mm2 (toughness), and 0.0004 gr/s (wear resistance) respectively. The best corrosion resistance of Fe-5Al-xMn-1.25C and Fe-Cr-C grinding balls were 0.016 mm/yr and 0.035 mm/yr respectively.
Optimization of Silver Nanoparticles Synthesis using Kawista (Limonia Acidissima Groff.) leaves ethanol extract
Authors: Wisnuwardhani H A , Lukmayani Y , Hazar S , Hoeruniswah H 
Published: November 2019

Abstract
Nanotechnology is one of science technology that current interest due to their wide variety of application in fields. Nanoparticle has different characteristic from previous macroscopic characteristic before it is turned to Nano-size. This research aims to get the optimum condition to synthesize silver nanoparticle from ethanol extract of Kawista (Limonia acidissima Groff). Extraction was done by refluxs method. Different variation does the optimization of silver nanoparticle, i.e., with and without incubation, with and without stabilizer, with and without stir, and stirrer time variation. The optimum condition to synthesize silver nanoparticle was conducted based on characterization result from UV-Vis Spectrophotometric method, and particle size from particle size analyzer result. The optimum condition to synthesize silver nanoparticles was done using AgNO3: 1% ethanol extract = (10 :1), 5 hours of stirred and 15 hours of incubation time. Those silver nanoparticles are 130, 4 nm in particle size and 0,295 in polydispersity index. Per SEM characterization, silver nanoparticles have a rod and ellipse in shape.
Effect of solid lipid nanoparticles system on the stability of Green Tea leaves (Camellia sinensis L. Kuntze) extract as sunscreen
Authors: Aryani R , Hidayat A F , Darma G C E , Utami O 
Published: November 2019

AbstractGreen tea (Camellia sinensisL.) is known to have activity as antioxidant and sunscreen due to its catechin compound. The major catechin-derived compound is epigallocatechin gallate (EGCG). However, EGCG in green tea leaves is unstable due to its rapid degradation and large molecular mass of 458 daltons, making it difficult to penetrate the skin. The purpose of this research is to formulate solid lipid nanoparticles (SLN) of green tea leaves ethanol extract using high speed homogenization and sonication method, as well as to evaluate SLN ability in improving extract stability as sunscreen using UV-Vis spectrophotometry. SLN formula contained 0,1% green tea leaves ethanol extract, and the most optimal formula was composed of 4% lipid (Precirol ATO 5:Gelucire 44/14) 4:1 and 1% Kolliphor P188 as surfactant. Characterization results showed particle size of 286.7 nm, polydispersity index 0.296, and zeta potential -3.7 mV. Photostability test using 120-minutes irradiation showed decrease in percentage of DPPH free radicals damping at 5.34% extract and 1.77% SLN for UVA, and 7.7% extract and 2.34% SLN for UVB.
Analysis of seismic signal in order to determine subsurface characteristics
Authors: Ayu H D , Sarwanto S 
Published: November 2019

Abstract
The purpose of this study is to know how to analyze the seismic signals volcanic to determine subsurface characteristics. The method used to analyze seismic signals volcanic is Fast Fourier Transform. Sample signal seismic wave of this study come from Semeru Volcano and Ijen Volcano signal seismic based on seismogram. The first data are given by swarm and wvw software. Analyze seismic wave in this study proves the existence of a relationship between seismic attributes (frequency, amplitude, time (origin, primer dan secondary) and attenuation) of the characteristics of the earth's surface. This study proved there is the correlation between subsurface characteristics and energy, it shows by attenuation factor value (Q value). The value of factor Q indicates how many waves are absorbed by the medium.
Impact of using augmented reality applications in the educational environment
Authors: Annafi A , Hakim D L , Rohendi D 
Published: November 2019

Abstract
This study discusses a literature review that focuses on the use of Augmented Reality in the educational environment. The author reviews articles published in the last 10 years that discuss the use of Augmented Reality in learning media at all levels of education. A total of 30 articles were analyzed thoroughly. The result shows various types of research methods were found and the levels of education varied from early childhood education, elementary school, junior high school, senior high school, vocational school, and tertiary education, even the technology was also used for students with special needs (disability). The research designs found also varied such as Experiment, Analysis, Action Research, Surveys, Mixed Method, and Research-Based and Development. The most prominent role of Augemented Reality in educational environment is to increase students’ thinking ability, understanding, motivation, response, and learning outcomes towards the learning process. Most of the researches were conducted in secondary level while little attention was given in vocational level. Thus, this article would recommend to future studies to conduct more researches in vocational setting in order to display more evindence about the phenomenon of Augmented Reality in educational setting.
Exploration of the augmented reality model in learning
Authors: Afandi B , Kustiawan I , Herman N D 
Published: November 2019

Abstract
Augmented reality is a technology that integrates virtual content into real environments in the form of mobile and desktop. This technology has begun to be developed in various fields, even as a learning medium with various models. We are exploring augmented reality models that have been developed by reviewing several journals related to augmented reality. We have collected 100 journals from various data sources with augmented reality keywords. We select 41 journals and we find 5 augmented reality models, including 3D models, 3D simulations, 3D animations, video models, multimedia models. There are two types of augmented reality, using markers and without markers, for augmented reality using markers requires a marker as a trigger for the emergence of augmented reality objects into the real environment, while augmented reality without markers does not require markers to trigger the emergence of augmented reality into real environments.
The impact of E-learning on higher education perception, skills, critical thinking and satisfaction
Authors: Khan M L H , Setiawan A 
Published: November 2019

Abstract
E-learning was initially implied as an emotionally supportive network for separation learning and this is the reason e-learning is regularly called separate training, despite the fact that e-learning is a smaller idea. E-learning is utilized to convey preparing, training and cooperation utilizing different electronic media in any case, overwhelmingly, the Internet, whose apparatuses have comprised the principle driver of e-learning and e-Learning has impact on students’ perception, critical thinking and others factors. The review is intended to provide a summary and a critique of various e-learning research topics and methods. The 3-step review process was composed of articles searching and retrieval, filtering and sorting, and final inclusion. It was found that e-learning improved student perceptions, communication, quality of education, critical thinking, self-learning and the result also shows that the impact of teacher’s responsibility and students’ satisfaction in higher education.
Survey of use mobile augmented reality for teaching materials
Authors: Fadhil M , Sumardi K 
Published: November 2019

Abstract
This study discusses the review of the literature focuses on the use of Augmented Reality (AR) as a teaching material. Authors conducted a review 20 articles which were published from 2008 to 2018. Design studies also found a variety of experiments such as data, analysis, action research, surveys, mixed methods, and Research and Development. This review found that the use of AR as a teaching material in learning shows that the AR is able to improve your skills, understanding, motivation, response, and the results of student learning of the content and media used.
Green skills for electrical engineering students
Authors: Nurdiansyah N , Mulyanti B , Sucita T 
Published: November 2019

Abstract
Green skills are the knowledge, skills, abilities, values, and attitudes needed to develop and support efforts to reduce the impact of human activities on the environment for the realization of social, economic and survival. This study aims to identify green skills especially for electrical engineering students and why this is important. In this study literature studies were conducted with documents and articles sought in electronic databases such as Academia, Elsevier, Emeraldinsight, Google Scholar, ResearchGate, and ScienceDirect. The findings from the results of this literature study reveal that the importance of green skills for electrical engineering is inseparable because the demand for labor in the renewable energy sector reached 10.35 million in 2017, up 5.3% from the previous year and predicted to continue to rise in the following years. The ability such as renewable energy skill and energy efficiency skill are some of the green skills that are suitable for electrical engineering students. To developing green skills, require effort such as developing a curriculum that is oriented towards environmental sustainability and with the integration of environmental sustainability content through problem-based learning.
Sick building syndrome: Assessment of school building air quality
Authors: Vesitara R A K , Surahman U 
Published: November 2019

Abstract
Sick Building Syndrome is a term used to describe a situation in which occupants of a building have a symptoms and discomfort. Sick Building Syndrome The symptoms of SBS are shown in complaints that occur in occupants of the building as well as eye irritation, nonspecific symptoms, upper respiratory tract, lower respiratory tract, and skin irritation. SBS was also met on building buildings in schools which caused disruption of teaching and learning activities The method of this study used a literature review which conducted on journals published in the last 10 years with the aim of producing references that are more focused on the development of the latest problems and solutions. The result of this review show that SBS occur because an environment factor, thermal factor, and psychosocial. Overall, this review provides an appropriate reference for further research by the specific factors about SBS and further symptoms related to SBS affect student learning outcomes.
The dynamics of electronic cinema production to maintain rating
Authors: Paramita S 
Published: November 2019

Abstract
Electronic cinema or so-called sinetron is an important industry in private television in Indonesia. Without sinetron, private television will not be able to survive digital of era today. Although sinetron as a product of mass communications appear in era before it, in fact, sinetron can still survive until today. For that, the production house raced to create a sinetron story that is interesting to watch by the people of Indonesia. MNC Picture which is a subsidiary of MNC Group has produced sinetron, films and TV shows to support TV stations under MNC Group such as RCTI, MNC TV, Global TV, and others. Sinetron made by MNC Picture was able to grab the attention of Indonesian audiences, as evidenced by Sinetron able to become television program with the highest rating. It is interesting to examine in the study of communication science to find out how the dynamics of electronic cinema production to maintain the rating in MNC Picture. The theory used to approach the object is the political economy theory of communication and mass communication. The methodology used in the research is qualitative phenomenology. The result of this research is that there are three components of electronic cinema production dynamics to maintain the rating in MNC Picture which is sinetron theme and storyline which is close to Indonesian people habit, second monitoring of rating, and placement of digital product in sinetron content.
Online digital media in supporting product sales
Authors: Hamdan Y , Ratnasari A , Julia A 
Published: November 2019

Abstract
The phenomenon of online shopping is currently trending in the community, one of the supporting aspects because the convenience offered by online sellers can increase the enthusiasm of people to buy products. Business women follow this trend by using online digital media to support product sales. This study aims to analyze the use of online digital media including the most effective websites, Facebook and Instagram in increasing sales. Research informants were Indonesian Women Entrepreneurs Association (IWAPI) of West Java. Qualitative methods are used with a case study approach. Data collection is done by observation, interviews, and literature. The research findings found women entrepreneurs using websites, Facebook, and Instagram to market and support product sales. Among the three media, Instagram is the most used and most effective media in increasing sales. The benefits of using media are to inform and remind potential consumers and consumers of the products offered, in the form of photos and videos. The media support transactions with potential customers through the WhatsApp facility. The inhibiting factors for the use of media include women entrepreneurs who cannot fulfill the wishes of prospective consumers of product information quickly.
ICT (Information and Communications Technology) - based on social and emotional competence assessment
Authors: Hikmah H , Koeswantono S , Fridani L , Hapsari N M 
Published: November 2019

Abstract
The aim of this research is to develop an ICT-based on social and emotional competencies assessment that is practical and effective. The on line assessment application model that is developed in this study is an online assessment that utilizes information and communication technology with social-emotional assessment applications (Si Emo®). ICT-based assessment is an online assessment application based on information and communication technology. The online assessment development process includes the preparation of social-emotional assessments offline, then includes assessments to the server to be used online. The availability of supporting technology (both hardware and software) and readiness of human resources (HR) are needed for the development of this assessment. This study is a type of R & D (Research and Development) approach with a guideline development model. This research was conducted in PAUD institutions which involved early childhood educators in Jakarta. Data collection techniques were conducted through observation, interviews, and questionnaires. Data analysis techniques were carried out with descriptive analysis. The product feasibility testing stage was validated by experts, whereas alpha and beta tests was conducted by early childhood educators. The results obtained from this study are a set of social and emotional assessments application (Si Emo). The results showed that Si Emo application is valid, reliable and useful to assess children’s social and emotional competency. The implication of this research can be used as one of solutions for early childhood educators in assessing social-emotional aspects of children’s development.
Early warning system model as a resilience of disaster-prone communities
Authors: Rochim M , Bajari A , Damayanti N A , Bakti I 
Published: November 2019

Abstract
Living in a watershed (DAS) means getting ready for the risk of flooding. The choice of relocation is often taken by the government to reduce these risks. But the attachment of citizens to the surrounding environment makes relocation not the best choice. This study seeks to reveal how the Garda Caah community as citizens in the Citarum River Basin is able to decide and be responsible for their ideas, decisions and actions in the face of flooding. This study uses qualitative methods with a case study approach. The data collection techniques are carried out by interviews, focus group discussions and observations. The findings resulted resilience the communities around the Citarum watershed are realized by forming the Garda Caah Community, which in their work projects seeks to minimize the effects of flooding by sharing information about possible flooding. The Garda Caah community created a flood early warning system so that residents and local governments prepared to face flooding. Dissemination of information about floods is carried out through various media commonly used by the public, both traditional and modern channels.
ICT literacy level analysis of elementary school teachers
Authors: Latif M A , Abdullah A G , Hakim D L , Widiaty I , Islami A R , Zakaria D , Arasid W , Anggraeni A 
Published: November 2019

Abstract
The purpose of this study was to determine the level of Information and Communication Technology (ICT) literacy in the ability of elementary school teachers in integrating ICT in learning and knowing the factors that influence ICT literacy of teachers reviewed by age, gender and educational background. The method used is a quantitative descriptive approach with a longitudinal trend survey method, with data collection techniques using a questionnaire. The results of this study indicate that the level of ICT literacy of elementary school teachers which refers to the Ministry of Communication and Information of the Republic of Indonesia is at the level one of the six levels available. This means that an individual has had one or two experiences, where information is an important component for achieving desire and solving problems, and has involved information technology to look for it. Then based on inferential analysis the factors that influence the level of ICT literacy of elementary school teachers show that age and gender factors significantly influence the ICT literacy of teachers. While the education level factor does not have a significant influence on the level of ICT literacy of teachers. The results of this study can be a reference for improving the ability of elementary school teachers in ICT literacy.
Level of ICT literacy: The ability of elementary school teachers to use ICT investigation in Cimahi
Authors: Islami A R , Abdullah A G , Hakim D L , Widiaty I , Latif M A , Juhana A , Amelia N , Putra D E 
Published: November 2019

Abstract
This study aims to analyze the level of information and communication technology (ICT) literacy of elementary school teachers and determine the level of ICT literacy of elementary school teachers grouped by; gender and age. The number of participants in this study were 345 respondents spread across 3 sub-districts. The method used is a descriptive quantitative approach with data collection techniques using a questionnaire. Research shows that the level of ICT literacy of elementary school teachers is at level 2 of 6 levels, where teachers have repeatedly used ICTs to help with daily activities and have a pattern of repetition in their use. Based on gender and age, there was no significant difference between the ability of male and female teachers. Then when viewed by age shows a significant value between younger teachers and older teachers. Where the younger teacher's age has the higher level of ICT ability.