bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fabrication of plasmonic structures with well-controlled nanometric features: a comparison between lift-off and ion beam etching
Authors: Abasahl B , Santschi C , Raziman T V , Martin O J F 
Published: August 2021

Abstract
After providing a detailed overview of nanofabrication techniques for plasmonics, we discuss in detail two different approaches for the fabrication of metallic nanostructures based on e-beam lithography. The first approach relies on a negative e-beam resist, followed by ion beam milling, while the second uses a positive e-beam resist and lift-off. Overall, ion beam etching provides smaller and more regular features including tiny gaps between sub-parts, that can be controlled down to about 10 nm. In the lift-off process, the metal atoms are deposited within the resist mask and can diffuse on the substrate, giving rise to the formation of nanoclusters that render the nanostructure outline slightly fuzzy. Scattering cross sections computed for both approaches highlight some spectral differences, which are especially visible for structures that support complex resonances, such as Fano resonances. Both techniques can produce useful nanostructures and the results reported therein should guide the researcher to choose the best suited approach for a given application, depending on the available technology.
Mixed convection flow of viscoelastic Ag-Al2O3
/water hybrid nanofluid past a rotating disk
Authors: Gamachu Dachasa , Ibrahim Wubshet 
Published: August 2021

Abstract
An exploration is carried out to inspect mixed convection flow of viscoelastic hybrid nanofluid past a rotating disk under slip and convective heating condition influences. As the hybrid nanoparticles,

Al

2

O

3

and silver (Ag) are considered with carboxymethyl cellulose (CMC) - water with low concentration (

0.0
−
0.4
%

) preferred as a base fluid. The viscoelastic (non-Newtonian) fluid model is assumed in favor of hybrid nanofluids applying magnetic field influences normal to the flow of fluid. The nonlinear ordinary differential equations get a hold from the governing equations are simplified using suitable similitude into dimensionless from and are solved via the influential method called Galerkin finite element method. The roles of physical parameters on radial and tangential velocities, temperature and concentration are exhibited graphically with their physical features. The results show that enrichment in the values of Grashof number be inclined to develop buoyancy forces which speed up the motion of fluid and tends to increases radial and tangential velocity fields but it imposes to decline temperature and concentration profile. Also, the outcome confirms that the distribution of temperature and concentration can be controlled with higher alumina and silver nanoparticles volume fraction. Moreover, the effects of thermal Grashof number, volume fraction of alumina and silver nanoparticles on skin friction coefficients, Nusselt number and Sherwood number are numerically discussed through tables. It also corroborates that 3% vol. fraction of

Al

2

O

3

and Ag nanoparticles has the greatest −

Θ
′
(
0
)

than 1% vol. fraction of

Al

2

O

3

and Ag nanoparticles.
Teaching IC Timer through simulation for future STEM teacher
Authors: Dewi D P , Fuada S , Nugroho P T , Kholidatuzzahra Z , Afionita D 
Published: August 2021

Abstract
Teaching in the STEM field based on the simulation is the necessary for students to understand the concepts and materials that have been given. This paper presents a simulation performed using IC Timer to generate a square signal using a virtual laboratory circuit wizard simulation software. In conducting the simulation, there are stages that will be given to students. There are 10 stages that will be explained in the lab experiments section. The method used consists of design for simulation. With this paper, it is expected that future teachers can provide simulated teaching to their students well. The results obtained in the simulation using this IC Timer are square signals that can be generated by the IC Timer circuit, and the results of frequency calculations, both through theoretical calculations and calculations with an oscilloscope do not show significant results. Teachers can provide teaching to students through simulation with a virtual laboratory first before carrying out practice directly, so students can use real devices properly and can reduce the risk of damage.
Design of a Web-Based Digital Learning Resource Center to assist online learning with mathematics content in primary schools
Authors: Sutisna M R , Yuniarti Y , Windayana H , Hendriyana H 
Published: August 2021

AbstractImplementation of online learning policy has become an alternative solution. In another way, also raises various problems faced by teachers, students, and also parents who accompany their children to study online from home. Especially in learning with Mathematics content which already has a negative stigma. This development process aimed to assist teachers in providing digital learning resources in the learning process by providing a digital learning resource center that can be used by teachers, students, and parents. The main focus of this study is 1) the design of the digital LRC website. 2) Development of a digital LRC website that can be used by teachers in presenting the learning process. 3) provide helpful guidance for teachers in digital learning development by utilizing digital LRCs. The development of the Website-Based Digital LRC is realized through a seven-step Software Development Life Cycle (SDLC) design model. This paper will only focus on Systems Analysis and Requirements and also describing the DLRC system design that will be developed. The design resulted from this study is a Website-Based Digital LRC that can be utilized by both teacher and student. Optimization of this Digital LRC has the potential to reduce the time and effort of a teacher in their preparation for learning.
Computer game-assisted intructional model for teaching science in elementary school
Authors: Hernawan H , Rifqiana W , Taofik D B I , Mulyani L S 
Published: August 2021

Abstract
This paper discusses the results of an experimental study on the implementation of computer-assisted science teaching in an elementary school in Indonesia. With a goal to enhance student learning interests and outcomes, we experimented a science teaching practice using a computer game. To this end, we involved as many as 31 students in our study. Student learning interests were measured using questionnaires. After conducting three experiments, we found that the use of a computer game effectively improved their interests in learning science. In addition, the improvement was made in their learning outcomes.
Students’ experience of online game-based assessment tool during emergency remote teaching
Authors: Saputra E R , Rusmana N 
Published: August 2021

Abstract
Emergency remote teaching makes teachers should review the appropriate way of assessing students appropriately. Various programs and applications have been developed to assess students online. However, as learners do not always perceive learning tool effectiveness in the same way as educators, this study tries to investigate the perspectives of learners regarding the use of game-based assessment tool, namely Quizizz. The perceptions of sixty freshmen college students regarding the use of this tool are documented using questionnaires. The main findings of the study show that the students demonstrated positive attitudes towards the use of Quizizz during emergency remote teaching. They perceived it as a useful program that was easy to use, and they reported the intention to use it in the future in the post-pandemic era. Besides, this program could enhance students’ learning engagement in terms of cognitive, behavioral, and emotional engagement. It, therefore, can be concluded that Quizizz becomes an alternative way of assessing the students online, while at the same time promoting their learning engagement.
Learning device in the “STEMpedia” mobile learning application
Authors: Hamdu G , Mulyadiprana A , Mukti H , Yulianto A , Karlimah K 
Published: August 2021

Abstract
Access to the results of the audience and the use of innovative mobile learning with the aim of innovation, skills in technology, and media information are indispensable. The implementation of science, technology, engineering and mathematics (STEM) learning as innovative learning in elementary school must be accessible to the teacher in real life. STEMpedia’s mobile learning application was developed using Design-Based Research model Reeves, which consists of four stages: 1) identification and analysis of the problem; 2) Development of solutions based on information obtained; 3) Perform repeated processes to test and repair; 4) Reflections. The results of this research in the form of mobile learning application in STEM learning in elementary school that contains learning device and video of STEM learning implementation, this mobile learning application can be accessed on Android smartphone version. The product is accessed by the teacher as a medium to learn STEM learning so that the real picture of the condition in its implementation.
Creating songs using online software
Authors: Julia J , Iswara P D , Supriyadi T 
Published: August 2021

Abstract
In an era of social distancing due to the Covid-19 pandemic, a method is needed for music educators to remain productive in creating and fulfilling music teaching materials without involving other parties. One feasible solution is to use online software to compose music or songs. This article elaborates a method to easily compose musical accompaniments and melodies using an online software, Hookpad. There are six steps in composing a song melody and its accompaniment: (1) preparing a music sheet online via a browser, (2) setting meters, keys, and tempo, (3) selecting musical instruments or sound patches, (4) selecting the chords pattern, (5) filling in the melody, and (6) exporting to a WAVE/MP3/MIDI file. Creating songs using online software is very effective in terms of processing time and can minimize the number of people involved in the work and can produce good quality sounds. In conclusion, Hookpad online music software can be a solution for working in solitary with satisfying music sound quality.
Making media for learning musical instruments using the Scratch application
Authors: Julia J , Gunara S , Iswara P D 
Published: August 2021

Abstract
The challenge for music educators in distance learning is the inability to practice teaching musical instruments directly to students. This article aims to bridge music educators so that they can still teach musical instruments to students and the students can continue to learn music even though they are learning from home. The solution offered is learning music using the Scratch application on a laptop or desktop computer as the controller. There are five steps to make music learning media using the Scratch application: (1) downloading and installing the Scratch Desktop application, (2) making designs or icons for each music scale, (3) recording or inputting sound musical instruments, (4) setting the buttons for each musical scale, and (5) playing the musical compositions. The Scratch application was effective in making learning media for learning musical instruments, learning to recognize the sounds of musical instruments, and learning to memorize song melodies. In conclusion, the Scratch application can be a solution for creating computer-based learning media for musical instruments.
Mathematical learning trajectory in primary school
Authors: Mutaqin E J , Asyari L , Tetep T , Hamdani N A 
Published: August 2021

Abstract
Piagets’ theory of cognitive development states that every child has their own way / strategy in interpreting and adapting to their environment. The strategy or method used by students towards learning situation is one of the stages of the learning trajectory. Learning trajectory is a learning line or route that provides an overview of the prerequisite knowledge students already have (as a starting point) and each step from one point to the next that describes the thinking process and methods used by students. This means that students’ factors are the main case and must be considered in creating a learning design. By understanding the learning flow, students can provide various alternative strategies or scaffolding to help and overcome students who have difficulty in understanding mathematical concepts in elementary schools.
The development of attitude assessment instrument in STEM learning in fifth grade elementary schools
Authors: Muiz D A , Sabillah D S , Karlimah K 
Published: August 2021

Abstract
This research is a developmental study focuses on developing an attitude assessment instrument in STEM (Science, Technology, Engineering, and Mathematics) learning to support the 2013 curriculum implementation in facing the challenges of globalization in real life. This research was motivated by the fact that several schools still had not yet developed an instrument for assessing attitudes in STEM learning and the the teacher usually assessed students subjectively. This study aims to develop and describe the design of the attitude assessment instrument in STEM learning. The research design used was the Educational Based Research with the Generic EDR model proposed by Mc Kenney & Reeves which consists of three stages, namely: 1) the analysis and exploration stage; 2) the design and construction stage; and 3) evaluation and reflection stage. The data collection techniques used in this research were literature study, interview, document analysis, and expert judgment.
Analysis of mathematical connection ability of elementary school students
Authors: Sumartini T S , Hamdani N A , Maryati I 
Published: August 2021

AbstractMathematical connection ability is one of the important abilities that students have. This study aims to analyze the mathematical connection ability of elementary school students. The research method was carried out qualitatively with a purposive sampling technique. The sample was taken as many as two elementary school students. Data collection using written tests and interviews. The data analysis was done qualitatively by analyzing the results of the students’ answers in the written test and then the verification stage was carried out during the interview. The results showed that the students’ ability to connect mathematics topics and mathematics applications was still lacking. This is motivated by the students’ lack of conceptual understanding. In addition, it is necessary to consider students’ self-efficacy in developing mathematical connection skills.
Analysis of the use of mathematic animation video as a line learning alternative to learning motivation
Authors: Wiryanto W , Mariana N , Budiyono B , Rahmawati I , Indrawati D , Rachmadiyanti P , Mintohari M 
Published: August 2021

Abstract
The purpose of this study was to determine the use of mathematical animated videos on student learning motivation in online learning. The research method uses qualitative, data collection techniques consisting of interviews and questionnaires. Interviews were conducted with teachers and questionnaires were given to grade III students at Al Islah Elementary School with 31 students through Google documents, interview results, and questionnaires were analyzed using word decryption. The results of this study 95% of students liked online learning using mathematical video animation and made it easier for them to understand the learning material. According to the teacher at Al Islah Elementary School, he acknowledged that using animated videos while learning mathematics can mature students’ understanding of the learning process.
The effect of using digital variety media on distance learning on increasing digital literacy
Authors: Muharam A , Mustikaati W , Sanny A , Yani F , Wiriyanti K 
Published: August 2021

Abstract
At present, distance learning, especially for low-grade students, is limited by the use of learning media that is not yet in accordance with the child’s cognitive stages. This paper describes the results of using digital variety media in distance learning that are adjusted to the abilities and stages of children’s digital literacy skills. This media is developed according to the easy learning stages consisting of comics, interactive videos and assessments that are integrated with learning materials. This study uses an experimental method of the relationship between the effect of using digital media on increasing children’s digital literacy. Media that is incompatible with the abilities of low grade children can be avoided by teachers in the distance learning process because low grade children need the introduction of digital literacy skills that are in accordance with the child’s cognitive thinking stages.
Substrates and storage time evaluation for preparing tempeh starter from Rhizopus oryzae CBS130145
Authors: Nursiwi A , Pertiwi F , Ishartani D , Sari A M , Zaman M Z 
Published: August 2021

Abstract
Tempeh is a soy-based product fermented using tempeh starter culture. The starter culture is ususally produced traditionally, and therefore has an inconsisitent purity and composition. This study therefore aims to determine the viability of Rhizopus oryzae CBS130145 grown on various substrates, rice, cassava root, cassava flour, and tapioca flour, then stored for four weeks at 27°C, as well as to determine the texture of the tempeh made using Rhizopus oryzae CBS130145, grown on various substrates and commercial inoculum, as a starter. The starter culture was produced using Rhizopus oryzae CBS130145 isolated from “usar”, obtained from Wonogiri. According to results, the mold’s viability in each tempeh starter prepared using Rhizopus oryzae CBS130145 grown on various substrates, rice, tapioca flour, cassava, as well as cassava flour and stored for four weeks at room temperature, did not differ significantly. In addition, the texture of tempeh produced using all tempeh starter culture did not differ significantly with the commercial stater counterpart. However, further research using lengthened storage time of tempeh starter culture is required to understand the stability of Rhizopus oryzae CBS130145 during storage.
Yield Determinants of Some Sweet Potato (Ipomoea batatas L) Clones Using Principal Component Analysis
Authors: Lestari M W 
Published: August 2021

AbstractThis study aims to determine the factors influencing the yield of sweet potatoes using the Principal Component Analysis (PCA). Meanwhile, this tool was used to form new set of smaller and mutually independent variables (no longer correlated) based on the research variables which includes Plant Length (PL), Number of Leaves (NL), Number of Shoots (NS), Leaf area (LA), Total Fresh Weight (TFW), Number of Tubers (NT), Fresh Weight of Tuber (FWT), Dry Weight of Tuber (DWT), and Harvest Index (HI). The results showed that the combined effect of TFW, NT, FWT, and DWT, as the main determinants of sweet potatoes yield was 71.048% as indicated by the total variance (cumulative percent of variance). Therefore, treatments in line with these values are important for improved crop yield.
Effect of Phosphorus and Calcium Availability as Influenced by Manure, Rock Phosphate, and Dolomite on Soybean Yield
Authors: Minardi S , Haniati I L , Harieni S , Sudadi  , Cahyono O , Suryono  
Published: August 2021

Abstract
Soybean (Glycine max) contains nutritional components such as high protein which support health needs and improve the quality of life. However, to achieve this standard, soybean productivity needs to be increased. Manure, rock phosphate, and dolomite are potential alternatives in improving soybean production. This study aims to examine phosphorus and calcium availability as Influenced by manure, rock phosphate, and dolomite to increase soybean yield. The experiment consisted of six treatments groups with four replications using a completely randomized block design. Furthermore, the groups include T0 (Control), T1 (5 t ha−
1 manure + 2.5 t ha−1 rock phosphate), T2 (5 t ha−1 manure + 5 t ha−1 rock phosphate), T3 (5 t ha−
1 + 2.5 t ha−1 dolomite), T4 (5 t ha−1 manure + 5 t ha−1 dolomite), and T5 (5 t ha−1 manure + 5 t ha−
1 rock phosphate + 5 t ha−1 dolomite). The results showed that phosphorus and calcium availability were significantly influenced by manure, rock phosphate, dolomite, and simultaneously increase soybean yield. Also, the best number of filled pods, 100-seed weight and yield were obtained with the application of 5 t ha−1 manure + 5 t ha−1 rock phosphate + 5 t ha−1 dolomite (20 pods plot−1, 0.62 g, and 260.89 g plot−1 respectively). Therefore, based on the results, phosphorus and calcium obtained from manure, rock phosphate and dolomite potentially increase soybean yield.
The Effect of various vegetable oils in basal diets on the carcass and non-carcass characteristics of local duck
Authors: Hadi R F , Sudiyono  , Wati A K 
Published: August 2021

Abstract
This study aims to examine the effect of various vegetable oil in the basal ration on carcass and non-carcass characteristics of local duck. It was conducted using a Completely Randomized Design (CRD) in a unidirectional pattern with 4 treatments and 6 replicates consisting of 6 ducks each. The treatments used include; P1: (96% basal ration + 4% palm oil); P2: (96% basal ration + 4% canola oil); P3: (96% basal ration + 4% coconut oil) and P4: (96% basal ration + 4% soybean oil). Furthermore, data were collected after the ducks were slaughtered at the age of 9 weeks, where 2 ducks were slaughtered at each test. The data obtained were analyzed using the Analysis of Variance (ANOVA) while the Duncan’s Multiple Range Test (DMRT) was used when there are significant results. Moreover, the analysis results showed that the treatments had no significant effects (P > 0.05) on the head percentage, as well as the shank, thigh, wing, breast, and back percentage. Based on the results, it was concluded that the addition of different types of vegetable oils in the basal ration failed to improve the carcass and non-carcass characteristics of local duck.
Concentration Test of Liquid Bioslurry and Mushroom Baglog Waste as a Plant Medium on Growth and Results of Strawberries (Fragaria sp.)
Authors: Roeswitawati D , Sulistyowati A , Ishartati E 
Published: August 2021

Abstract
Backlog mushrooms are organic waste used as a plant medium. Also, bio-slurry is a waste of biogas, used as an organic fertilizer, due to containing many rotting microbes. When the two ingredients are combined, it becomes a good source of organic fertilizer for plants. Furthermore, strawberry fruits (Fragaria sp.) are increasingly getting demanded, due to their vitamin content, which is very good for the health. The purpose of this study was to determine the interaction between the treatment of bio-slurry concentration and the composition of the growing media on the growth and yield of strawberries. Also, the study was conducted in the integrated laboratory of the Agrotechnology education park, Muhammadiyah University of Malang, between February to May 2019. This research used factorial experiments which were arranged randomly in groups. The first factor was the concentration of liquid bio-slurry, such as C0 (water, without bio-slurry), C1 (100 ml / l), C2 (125 ml / l), and C3 (150 ml / l), while that of the second was the volumetric comparison of the planting medium composition (soil : husk charcoal : mushroom baglog waste), namely M1 = (1: 1: 2), M2 = (1: 2: 1), and M3 = (2: 1: 1), with each treatment combination repeated 3 times. These results further showed no interaction between the concentration of bio-slurry, and the composition of planting media on the growth and yield of strawberries.