bluuebunny/crossref_metadata_2025_split huggingface dataset:
Flow rate influence of the peristaltic-based pumps on the QCM sensor
Authors: Pratiwi R A , Akbar M A , Sakti S P 
Published: March 2020

Abstract
The liquid injection is one of the crucial roles in the used of QCM sensors in a liquid application. Liquid sample injection should be controlled. The injection of the liquid sample to the sensor surface must be controlled in term of its volume as well as its flow rate. A syringe pump injection system for a single shot sample injection has been developed. However, the system lacked a continuous sample injection. In this study, a peristaltic-based pump has been developed. A motor stepper and appropriate motor driver allowed the system to works from a micro-step to full step speed. The injection system allowed one to control the volume as well as the flow rate. The developed system was able to feed a liquid sample to the QCM sensor surface with a wide range of flow rate. It was observed that the flow rate injection affected the QCM sensor to respond. Careful selection of the liquid flow rate was required to avoid an unintended effect on the QCM sensor. Using the developed system, we show that a minimum effect on the QCM sensor respond caused by the flow rate of the liquid injection can be achieved.
The diversity of gastropoda in meru betiri national park
Authors: Suratno  , Susilo V E , Doviyana V , Mujiono N 
Published: March 2020

Abstract
National Park plays important role in maintaining natural ecosystems such as freshwater ecosystems. Meru Betiri National Park is loacted in southern East Java, it covers two regencies, Banyuwangi and Jember. A recent survey was carried out in two resorts, Bandealit and Andongrejo, to study the diversity of freshwater gastropoda. We had collected 86 specimens which consisted of five families, seven genera, and nine species. Seven species were found from Andongrejo and four species were found from Bandealit. River in the Bandealit primary forest area had the highest diversity with four species. The relations between diversity and environmental conditions will be discussed briefly in this paper.
Implementation of environmental policy on solid waste management in Bondowoso Regency - Indonesia
Authors: Khoiron  , Probandari A N , Setyaningsih W , Kasjono H S 
Published: March 2020

Abstract
Solid waste is an important issue in the urban area that is in line with the increasing of resident’s number and the population activities. This study aims to analyze the problem and aspect related to waste management including operational-technical aspects, institutional aspect, legal and regulatory aspects, and community participation aspect in Bondowoso Regency. This study was descriptive research using a qualitative approach. The Data collected by literature study then analyzed qualitatively. There are laws correlated to solid waste management in Bondowoso, consist of: 1) Law No. 18 of 2008 on Solid Waste Management, 2) Law No. 32 of 2009 on the Protection and Environmental Management, 3) Government Regulations No. 81 of 2012 on Management of Domestic Solid Waste and Domestic-Like Solid Waste, 4) Local Regulations No. 3 of 2011 on Solid Waste Management In Bondowoso, and 5) Regent Regulation No. 82 of 2018 on Strategy and Policy Management of Domestic Solid Waste and Domestic Like Solid Waste. In addition, the Government of Bondowoso Regency has done many aspects of solid waste management, namely legal aspects, operational technical aspects, institutional aspects, and public participation.
On r-dynamic vertex coloring of line, middle, total of lobster graph
Authors: Harjito L O , Dafik  , Kristiana A I , Alfarisi R , Prihandini R M 
Published: March 2020

Abstract
Let G be a simple, connected and undirected graph that has a set of vertex and edge. The degree of v ∈ V(G) is denoted by d(v). The maximum and minimum degree of G respectively are Δ(G) and δ(G). The r-dynamic color of the graph G is calculated as a map c from V to a color set such that if u, v ∈ V(G) is adjacent, then c(u) ≠ c(v), and for each v ∈ V(G), |c(N(v))| ≥ min{r, d(v)}. The number of r-dynamic coloring of G denoted by χr
(G) is minimum color k in G. In this paper, we have obtained the r-dynamic vertex coloring of line, middle, total of lobster graph ℒn
(2, 1).
Risk management information systems assessment at the television broadcasting company
Authors: Selviyanti E , Sardjono W 
Published: March 2020

Abstract
Information systems are the basis used as support for the company’s business strategy. In the application of information systems, information system risk management needs to be done. In carrying out information system risk management, assessment is needed. The IT department of Rajawali Citra Televisi Indonesia company has a target of completing 600 tickets every month. The number of tickets that exceed the target of the IT department, has a gap to be a factor that influences the risk of information systems. The research was conducted to find information system risk factors and build an information system risk management assessment model. The method used in this research is confirmatory factor analysis. The factor influencing information risk is the threat factor to infrastructure. The formed model that can be used for risk management information system assessment is P = 6,934 + 1,184 X4. System risk can be said to be ideal if the company can reduce the threat factor to infrastructure, so that the risk of information systems can be minimized.
On total H-irregularity strength of diamond ladder, three circular ladder, and prism graphs
Authors: Suni D M O , Dafik  , Tirta I M , Kristiana A I , Nisviasari R 
Published: March 2020

Abstract
Let G be a graph with vertex set V and edge set E. A total labeling φ : V(G)∪E(G) → {1, 2, 3, …, α} is called a total α-labeling of a graph G. For the subgraph H ⊆ G under the total α-labeling, H-weight is defined as wtφ
(H) = ∑
v∈V(H)
φ(v) + ∑
e∈E(H)
φ(e). A total α-labeling is called an H-irregular total α-labeling of the graph G if wtφ
(H′) ≠ wtφ
(H”) for any two distinct subgraphs H′ and H” isomorphic to H. The minimum α for which the graph G has a total H-irregular α-labeling is called the total H-irregularity strength of G, denoted by tHs(G). In this paper we initiate to study the total H-irregularity strength of G and we have obtained the tHs of diamond ladder, three circular ladder and prism graphs.
Modeling of development of employee performance factors and dissemination
Authors: Sardjono W , Selviyanti E , Perdana W G , Sudrajat J 
Published: March 2020

Abstract
Key performance indicator (KPI) are generally used by companies as a benchmark to determine how well the performance of companies that can be represented by the employee’s performance. The higher performance of the employee, the better the performance of the company as well. Furthermore to be able to establish key performance indicators, there are several steps that need to be done in order to obtain measurements that compatible with the conditions of the company. In this study, key performance indicator development process will be conducted through the stages of designing a questionnaire, distributing questionnaires to the employees of Company, performing factor analysis and then developing a model of KPI. The output of this study are new factors that affect employee performance and a model of KPI that can be used as a reference in forming a company’s KPI. Once key performance indicators are formed, companies can take advantage of the knowledge management system for dissemination process of KPI
The total H-irregularity strength of triangular ladder graphs
Authors: Nisviasari R , Dafik  , Agustin I H 
Published: March 2020

Abstract
Let G be a graph which has V(G) as a vertex set and E(G) as an edge set. The G graph contain subgraph H that isomorphic with Hj, j = 1, 2, … s, if every e ∈ E(G) include only in one of the edge set of H subgraph (e ∈ E(H)). The total l-labeling is a graph labeling that give label positive integer number until l into vertices and edges. The total H-irregular labeling is a total l-labeling with condition that the sum of vertex labels and edge labels in two distinct subgraphs H
1 and H
2 isomorphic to H is different. We define H-weight as wtφ
(H) = ∑
v∈V(H)
φ(v) + ∑
e∈E(H)
φ(e), for the subgraph H ⊆ G under the total l-labeling (φ). The total H-irregularity strength of G graph (ths(G, H)) is the smallest l value in label of G graph has total H-irregular labeling. We used plane graphs such as triangular ladder graph and windmill graph.
The locating dominating set (LDS) of generalized of corona product of path graph and any graphs
Authors: Wardani D A R , Dafik  , Agustin I H 
Published: March 2020

Abstract
Graph G is usually written by G = (V, E) is graph G where V(G) is vertex set on graph G and E(G) is edge set on graph G. Graph G used in this study is only on simple and undirected graphs. Dominating set (DS) is graph G which have a vertex set D, where each vertex in D can dominate the neighboring vertices, in other words every vertex from u ∈ V(G) − D is adjacent to verted v ∈ D. The minimum cardinality of dominating set is called by domination number, symbolized by γ(G). Locating dominating set (LDS) is dominating set with additional condition. A graph G = (V, E) is said to be locating dominating set if the set of vertex dominator D satisfies every vertex that is not D, that is V − D has a different intersection set with D. The minimum cardinality of locating dominating set is called by locating domination number, symbolized by γL
(G). In this paper we will determine the LDS on edge corona product. The edge corona product of graph is development of corona product graph. The edge corona of two graphs G and H is obtained by taking one copy of G and |E(G)| copies of H and joining each end vertices of i-th edge of G to every vertex in the i-th copy of H, symbolized by G ⋄ H. The results in this study are shown that there is a relation between the locating dominating set on the basic graph and its operation.
Analysis of realistic mathematics learning approach on the students’ problem solving skill and self-confidence on sequence and series materials
Authors: Kosim A , Sunardi  , Tirta I M 
Published: March 2020

Abstract
This research aimed at analyzing realistic mathematic learning approach on the students’ problem solving skill and self-confidence on valid, practical, and effective squence and series materials. This research was conducted at vocational high school with the sample consisted of x grade students of automotive 1 as the experimental class which given a treatment of realistic mathematic learning approach. The subjects were selected purposively with the suggestion from the teacher who understood the students’ cognitive and affective condition. The method used was quantitative descriptive because it aimed at analyzing the effect of realistic mathematic learning on the students’ mathematics problem solving skill, and the effect of realistic mathematics on the students’ self-confidence. The results of the research showed that realistic mathematics learning approach had significant effect on the students’ problem solving skill and self-confidence. The tests carried out were normality test in the form of realistic mathematics learning as many as 5.043 and the students’ self-confidence as many as 5.031. Linearity test of the data of problem solving skill was 3.759 and self-confidence was 3.357. The regression equation 1 (Ȳ=-48.228+0.570
x
), regression coefficient obtained was 0.570, which meant that the effect was 61.9%. The results of hypothesis testing showed that the value of tcount > ttable (5.043>1.714), regression equation 2 (Ȳ=-51.535 + 0.539
x
), regression coefficient obtained was 0.539, which meant that the effect was 67.1%. The results of hypothesis testing showed that the value of tcount > ttable (3.697>2.064). The results of hypothesis testing showed fhitung
> ftabel
(5.043 > 1.714) therefore it can be concluded that : h0 was rejected and ha was accepted under the condition that there was a significant effect of realistic mathematics learning approach on the students’ problem solving skill and the results of hypothesis testing showed that fhitung
> ftabel
(5.043 > 1.714) therefore it can be concluded: h0 was rejected and ha was accepted under the condition that there was a significant effect of realistic mathematics learning approach on the students’ self-confidence. Thus, the effect of realistic mathematics learning approach on the student problem solving skill was 67.1% and self-confidence was 67.1%.
Problem solving analysis of rational inequality based on IDEAL model
Authors: Annizar A M , Masrurotullaily  , Jakaria M H D , Mukhlis M , Apriyono F 
Published: March 2020

Abstract
This research was conducted using descriptive qualitative method to describe the process of teacher candidates in solving the rational inequality problem. The IDEAL model was used as indicator of this research which tested on 35 students. In the step of identifying and defining the problem’s objective, students have understood the meaning of set of completion was value x which accomplished inequality to the problem. Mostly, students had the same strategy, yet there was difference in grouping rational expression, such as S2 and S3 who did “cross-multiplication” while another detracted two internodes with mathematical expression in the right internode. It turned out that S5 was the only student who found the whole critical points even though made a mistake in writing set of completion. In the step of “looking back”, none of students did the correction whether in calculation or concept even used another strategy to check the answer.
Student worksheet based on inquiry with vee map to improve writing skills in physics learning
Authors: Kusumawati T R D , Supeno  , Lesmono A D 
Published: March 2020

Abstract
Writing activity is an essential scientific practice in learning physics. Writing activities can enhance conceptual knowledge and develop students’ scientific literacy. Excellent writing skills reflect good learning outcomes and critical thinking skills. Writing includes a variety of complex skills that involve grammar, spelling, and punctuation, as well as the right language style. Complex skills are the demands of the curriculum and must be part of the learning target. Even so, students’ writing activities are still relatively low in this case, students are still unable to write structured and reconstruct sentences accurately. Therefore, to help improve this writing skill, the researcher uses a guided inquiry model accompanied by worksheet assisted by Vee map. Vee maps are integrated in an inquiry step that can guide students to facilitate writing activities. Vee maps consist of several conceptual components, including knowing, focus questions, and doing. This worksheet contains a Vee diagram that aims to make it easier for students to fill in the sheets and student understanding of the material. This study concludes that worksheet assisted by Vee maps can be used to construct of scientific writing in high school students’ physics lessons.
Analysis metacognitive skills of junior high school students on nervous system material with different academic skills
Authors: Jakiyah E , Suratno  , Waluyo J 
Published: March 2020

Abstract
Nervous system material is very complicated to learn so it needs thinking skills to develop understanding and improve cognitive performance that is using metacognitive skills. The purpose of this study is to analyze the metacognitive skills of junior high school students on regulation system material with different academic abilities. This research is a qualitative descriptive study. The research method uses a mix method (qualitative and quantitative). Qualitative data in the form of descriptive based on observations. Quantitative data are in the form of the MAI (Metacognitive Awareness Inventory) test based on MAI indicators, namely Knowledge About Cognition and Regulation of Cognition. This study into 3 categories, namely students with high, medium and low academic abilities. The results of the metacognitive research with high academics obtained an average value of 59.45, metacognitive with moderate academics obtained an average value of 60.44 and metacognitive with low academics obtained an average value of 59.45
The development of ecosystem education game based on Baluran National Park for senior high school
Authors: Alvionita D , Subchan W , Iqbal M 
Published: March 2020

Abstract
This is a development research, as a contribution to answer the challenges in education field in this global era where technology is developing very rapidly. The purpose of this research is to develop learning media for senior high schools in the form of educational games based on Baluran. The subject matter of the media is the ecosystem. The methodology used is the 4D Model. The stages of the 4D model include define, design, develop, and disseminate. This research is currently at the develop stage, that is media trials on a small group scale. The results of quantitative analysis of the media validity showed an average 89.25% with very valid category. Based on these results, the learning media is Educational Game of Baluran National Park Ecosystem for senior high schools, can be used at the next stage, namely media trials on a large group scale and to determine the effectiveness of the media on the learning process in subsequent research.
Mathematics interactive CD media based on discovery learning on congruence material and its effect on the students’ generalization thinking skills.
Authors: Widiatsih A , Baehaqi I , Ariyanto D 
Published: March 2020

Abstract
Technology is very much needed in learning in the current era of globalization. Technology-based learning using interactive CDs can activate students which can ultimately improve learning achievement. This is because teachers have always used conventional learning media so that learning outcomes are less than optimal. This study aims to describe the creation of interactive CDs on mathematics in two-dimensional figure chapters in grade IX SMP / MTs using Adobe Flash. In this study, the authors used a data collection method and problem approach which included: literature, observation, interviews, analysis, system design and manufacturing, testing and implementation. This research was conducted at MTs Nahdlatuth Thalabah. The results of this study are in the form of interactive CDs for mathematics subjects in two-dimensional figure material. The use of interactive CDs is highly recommended for use in learning so that the atmosphere is fun and interesting for students in mathematics so that student-centered learning can be realized to the maximum. This Research aimed at studying the students’ generalization thinking skills and the implementation of discovery learning to improve their generalization thinking skills in a comparative study. This research used a mixed-method combining quantitative and qualitative methods. This research involved 68 respondents that were divided into two classes, 34 students in the experimental class and 34 students in the control class. The results of this research showed that there was a significant difference which was proven by the independent t-test value for the post-test. The data analysis presented the independent sample t-test value of the post-test was sig. 0,000 ≤ 0.05 which means it was significant. Thus, there was an effect of implementing discovery learning in improving the students’ generalization thinking skills in learning by using interactive CDs on the congruence material.
The correlation regression equations between metacognitive skills and concept gaining of science and biology of Indonesian students
Authors: Siswati B H , Corebima A D 
Published: March 2020

Abstract
In the field of education metacognitive skills can be used as predictors of students’ concept gaining. There have been many researches on the correlation between metacognitive skills and concept gaining both at the elementary school level and high school levels. Several further researches were also conducted to uncover the factors that influenced the regression lines of the correlation. However, to date the actual factors affecting the coefficient value of the slope and intercept of the regression equations on the correlation between metacognitive skills and concept gaining have not been revealed. This research aimed at investigating the factors affecting the slope coefficient and intercept of the regression equation of the correlation between metacognitive skills and concept gaining of students in different educational levels implementing of one learning model. The design of this research was a correlational research in order to investigate the correlation between metacognitive skills as the predictor and the concept gaining as the criterion. Among the 27 regression equations related to the correlation between metacognitive skills and concept gaining of the students undergoing various learning models, that have been analyzed, 77.50% of them are parallel, and only 22.50% of them are intersected. Although there were some intersecting lines, the percentage of parallel lines was bigger. Several factors (education level, class level, academic ability, and learning models) which had been predicted to affect the slope coefficient as well as the intercept were finally proved to be non-affecting factors, because both parallel regression lines and intersecting regression lines were still found in the various conditions compared. This research revealed two factors affecting the slope coefficient and the intercept. These factors are the presence of shared variables that affect the value of X and Y and the measurement error. Further researches related to these factors are necessary to be carried out to uncover more accurate results.
Error analysis of undergraduate students in solving problems on ring theory
Authors: Fatmiyati N , Triyanto  , Fitriana L 
Published: March 2020

Abstract
This study aimed to describe the types of error of undergraduate students in solving problems on ring theory. It involved 46 undergraduate students of Mathematics Education, Faculty of Teacher Training and Education, Sebelas Maret University academic year of 2018/2019. The research type used in this study was qualitative with a case study design. Data was gathered through tests and interviews. Validity tests of the data were a triangulation of methods and using reference materials. The subjects were chosen by purposive sampling technique. Consequently, three students selected to be interviewed. Errors found in this study included translation error, concept error, strategy error, and an encoding error. On translation errors, students could not understand the definition of the set and operations used in the questions. While concept and strategy errors were due to student’s inability to understand and use mathematical definitions, such as the definitions of group, monoid, ring, and commutative ring. Students were unable to write mathematical definitions in the form of standard mathematical symbols, which indicated they did not understand them well. On encoding errors, students only focused on the final answers or conclusions without having proper reasons.