bluuebunny/crossref_metadata_2025 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.
Teachers’ belief toward science and local wisdom’s integration in mathematics instruction
Authors: Jingga A A , Sujadi I
Published: March 2020

Teacher beliefs affect classroom management. It has caught the attention of many researchers, but few have discussed teacher beliefs in the integration of Science and local wisdom in the teaching of Mathematics. This integration is needed to give students the relevance of learning a subject matter. This study tried to find out the teacher’s beliefs in integrating Science and local wisdom in Mathematics instruction and the inhibiting factors that teachers faced. This research was conducted through a qualitative approach, involving four teachers with different teaching experiences. Data was gathered through in-depth interviews and analysed through Miles and Huberman concept. All participants believed that the integration of science and local wisdom in mathematics instruction had a role in constructing students’ view toward mathematics, but only one participant was able to provide a unique example of the application of science integration and local wisdom in teaching mathematics. The biggest obstacles were experienced by all participants when integrating local wisdom in mathematical instruction due to their lack of knowledge of local wisdom and way to integrate it. Further research is needed to strive to strengthen teachers believe in this integration. Moreover, discussions between subject teachers need to be focused on integration so that the teacher’s insight, especially about local wisdom, can be wide open.
The analysis of students’ critical problem solving on circle-related questions using pesantren-based scientific approach
Authors: Kriswanto A , Susanto  , Irvan M
Published: March 2020

The objective of this study was to analyze students’ critical thinking skills in solving problems concerning circle material using pesantren-based scientific approach. This research employed qualitative descriptive approach, which involved students at class VIII of Plus Junior High School of Darussalam Blokagung Banyuwangi. The instruments used in this study included lesson plan, worksheet, achievement test, critical thinking ability assessment sheets, and questionnaires. From the instrument validation, the average score of each instrument was 3.87; 3.69; and 3.83 for lesson plan, worksheet, and achievement test. The data on students’ learning activities demonstrated the increase in their critical thinking skills. In the first meeting, 77.27% of the students achieved “Good” category. In the second meeting, 89.77% of them gained “Very Good” category, and in the third meeting 92.04% of the students were at “Very Good” category. With respect to the students’ learning outcome, which was set at 75 points, most of them were successful in achieving the minimum passing criteria in that 28 students (87.5%) satisfied the criteria, while 4 students (12.5%) failed. In addition, the analysis on observation data germane to students’ critical thinking skills also demonstrated an increase. In the first meeting, 65% of the students were at “Good” category. 72.5% of the students achieved “Good” category in the second meeting, and in the third meeting 85% of the students were at “Very Good” category. The results of the data analysis showed that students’ critical thinking skills in the solving circle-related questions using pesantren-based scientific approach indicated the achievement at “Very Good” criteria.
Deduction level of undergraduate students’ imagination in solving geometrical problem
Authors: Mahfut M , Sunardi  , Yudianto E , Purnomo R C , Firmansyah F F
Published: March 2020

This research aims to know the imagination process on Mathematics’ undergraduate students who had deduction level in solving Geometrics’ problem. This research is qualitative which the subjects in the research were 2 students that one female and one male. To know the imagination process, subjects were asked to solve two Geometrics’ problems. Analysis was done to determine the indicators of imagination that appeared for each subjects. To improve the data accuration, the researcher used triangulated data method for the data collection method, such as observation, students’ worksheet, and interview. The result showed that there were differencies that appeared for each subjects.
The students’ perception of the teacher’s apperception and its influence on students’ initial knowledge
Authors: Musthofa P R , Sujadi I
Published: March 2020

The first minutes of the learning process is a very influential time for the next hour of the lesson. Motivating, arousing interest, and attracting attention of the students are the important things that must always be built upon existing knowledge. Apperception plays a very important role in the learning process. The aim of this research is to determine the influence of students’ perceptions of the teacher’s apperception on the students’ initial knowledge. This research is a mix method sequential exploratory design conducted in the 10th grade of Science 2 class in MAN 1 Karanganyar at the time of learning the absolute value linear equations and inequalities. The data collection techniques used are quiz, questionnaire, and interview. The data analysis used is descriptive analysis supported by regression analysis results. The results showed that there was a significant influence of students’ perception of the apperception that the teacher had on the students’ initial knowledge.
The profile of student’s creative thinking skills in mathematics problem solving in terms of adversity quotient
Authors: Nahrowi  , Susanto  , Hobri
Published: March 2020

The objective of this study is to describe students’ creative thinking skills in terms of Adversity Quotient. Students of tenth grade math and science studies were given an AQ questionnaire to find out their personality types. Three students from each personality type of quitters, campers, and climbers were given tests to find out their creative thinking skills. The procedure of this study refers to the qualitative content analysis method: (1) giving questionnaires and tests, (2) presenting in detail about students’ mathematical performance, and (3) in-depth interviews. It was known from 97 subjects who were given questionnaire, 6 students are quitters’, 2 peoples switched from quitters to campers, 48 campers, 36 campers to climbers and 5 climbers. Three quitters and campers didn’t fulfill with creative skill qualifications. Whereas for the climbers’ showed fluency and flexibility.
Students’ combinatorial generalization thinking skills in solving tessellation coloring pattern problems and its enhancement through problem-based learning
Authors: Anwarudin M , Dafik  , Farisi M I
Published: March 2020

Combinatorial generalization thinking skills are important to support understanding of mathematical concepts, particularly in solving tessellation coloring pattern problems. This study aimed to analyze the students’ combinatorial generalization thinking skills and improve them by using problem-based learning (PBL), then present them with phase portraits. This study applied explanatory sequential method that combined quantitative and qualitative sequentially. The subjects were 23 elementary school students in the experimental class and 23 elementary school students in the control class. The research findings show that the levels of students’ combinatorial generalization thinking skills divided into weak, moderate, and strong. The result of independent sample t-test indicated that there was significant impact of PBL implementation with the significance of 0.03 (p<0.05). N-Gain shows that PBL is more effective than the conventional one. The enhancement on strong and moderate categories showed an increase of 43.47% and 8.69%, while the weak one showed a decrease of 52.18%. The descriptions of combinatorial generalization thinking skills are presented with phase portraits. The results reveal that the implementation of PBL increases the students’ combinatorial generalization thinking skills in solving tessellation coloring pattern problems of elementary school students.
Inquiry-based physics textbooks with multi representation to practice hypothetico deductive reasoning for senior high school students
Authors: Mahardika I K , Wardani P O , Yushardi  , Prasetyaningsih A
Published: March 2020

Physics learning consists of theories, concepts, and laws that study phenomena in the universe that must emphasize students to use higher-order thinking skills. Scientific reasoning is a thought process that is used to solve problems based on scientific evidence. When students can reason well, these students can understand the concepts of the material that has been learned. Hypothetico deductive reasoning is one of scientific reasoning that can foster higher order thinking skills. One that can support the success of the learning process is a textbook accompanied by an inquiry. This inquiry-based textbook accompanied by multirepresentations contains a description of physics subjects to find information and knowledge where students are encouraged to be directly involved in inquiry to practice hypotethico deductive reasoning skills. This book is equipped with multi representations to facilitate students in processing concepts and solving problems. Inquiry-based student textbooks accompanied by multiple representations can improve students to gain experience, investigate problems and draw conclusions according to scientific methods.
Characteristics of textbooks based on the sets(science, environment, technology, and society) of the respiratory system to improve the ability of junior high school students to multi-representations
Authors: Mahardika I K , Rudiansyah M I M Y , Yushardi  , Rasagama I G , Doyan A
Published: March 2020

This research is the development of a SETS-Based Respiratory Textbook, using a mixed method of the investigation model, which collects qualitative data, then constructs a SETS-Based Respiratory Book design that is ready to be validated. The subject in this study was a SETS-Based Respiratory Textbook that could improve the representation ability of eighth grade students of junior high school. Whereas the respondents were Science Subjects (IPA) teachers who were incorporated in the Consultative Assembly for Science Subjects (MGMP) in Central District of Jember Regency and students of class VIII of SMP. Data collection techniques using observation, questionnaires, tests, and documentation. Research data explained qualitatively. The purpose of this study is to find out whether SETS-based books can be validated from the appropriateness of their contents. The results showed that the SETS-Based Respiratory Textbook contained the phenomenon of the Respiratory System; and has a specific writing pattern, which has a sequence of chapter titles, sub-chapter titles, description of material, sample questions, and ability test questions, and bibliography.
Design of PISA-liked problem which used jember fashion carnival context to train students’ analytical thinking
Authors: Septiadi D D , Kholil M , Masrurotullaily  , Apriyono F , Aini A N
Published: March 2020

This study aims to develop PISA-liked problem which used Jember Fashion Carnival as it is context to support students’ analytical thinking. The PISA-liked problem then tested to 15 junior high school students at grade 8. This research is designed based on Ploomp model that satisfied validity, practicality, and effectiveness. Our analysis shows that PISAliked problem with JFC context was valid because the expert said that those items were valid with the score of 0.77. It’s also supported by the analysis of validity test which shows 0.63. Secondly, the problem was practical, because the students’ response was positive with 0.85 students answered so. Thirdly, the design also called effective, because it was reliable about 0.57. Meanwhile, around 0.73 among the students can use their analytical thinking and give reasons when they have to find the correct answer. Their strategies were connecting the problem to their prior knowledge and predict the solution.
Estimation of water volume in ungauged, dynamic floodplain lakes
Authors: Tan Z , Melack J , Li Y , Liu X , Chen B , Zhang Q
Published: March 2020

Lakes play a crucial role in retaining water and altering biogeochemical processes on floodplains. Existing strategies and algorithms for estimation of water storage are insufficient for dynamic floodplain lakes due to the scarcity of available observations. Combining a time series of open water area with a fine spatial-temporal resolution by integrating Landsat and MODIS observations of Poyang Lake (China) with digital elevation models, and limited gauge data, generated water storage estimates as a function of surface hydrological connectivity. Despite possessing a relatively small portion of Poyang Lake’s water volume, the floodplain lakes occupy a large part of the surface water area, especially in the low water period. Floodplain lakes, in particular, those distributed in the upper delta contribute to relieving drought conditions in Poyang Lake.
Widespread mangrove damage resulting from the 2017 Atlantic mega hurricane season
Authors: Taillie Paul J , Roman-Cuesta Rosa , Lagomasino David , Cifuentes-Jara Miguel , Fatoyinbo Temilola , Ott Lesley E , Poulter Benjamin
Published: March 2020

Comprised of 17 named tropical storms, 6 of which were major hurricanes, the 2017 Atlantic hurricane season ranked as one of the most damaging and costly hurricane seasons on record. In addition to socio-economic impacts, many previous studies have shown that important coastal ecosystems like mangroves are shaped by severe storms. However, little is known about how the cumulative effects of storms over entire hurricane seasons affect mangroves across large regions. We used satellite imagery from the entire Caribbean and Gulf of Mexico region to show that 2017 resulted in disproportionate mangrove damage compared to baseline responses over the previous 8 years. Specifically, we observed 30 times more mangrove damage, via a reduction in the normalized difference vegetation index (NDVI), during 2017 compared to any of the eight previous hurricane seasons, and most (72%) of this damage persisted throughout the 7 month post-hurricane season period as indicated by no NDVI recovery. Furthermore, wind speed, rainfall, and canopy height data showed that mangrove damage primarily resulted from high maximum wind speeds, but flooding (cumulative rainfall), previous storm history, and mangrove structure (canopy height) were also important predictors of damage. While mangroves are known to be resilient to hurricane impacts, our results suggest that increasingly frequent mega-hurricane seasons in the Caribbean region will dramatically alter mangrove disturbance dynamics.
Experimental verification of fine particle emission reduction based on acoustic agglomeration for steel sintering flue gas
Authors: Zhao Yun , Liu Chang , Zhou Hefeng , Tian Zhangfu , Zeng Xinwu , Gong Changchao
Published: March 2020

The sintering flue gas in steel production has the characteristics of large discharge capacity, fine size, high temperature, corrosion and fluctuation of working conditions, and is the primary control object of PM2.5 emission source. Traditional dust removal technologies and equipment are difficult to achieve efficient collection of fine particles. In order to quantitatively study the effect and regularity of high intensity sound waves on fine particles, the online acoustic agglomeration test system was built by using high-power pneumatic source and wave tube with abrupt section. The high intensity standing wave field of 140 to 150 dB was generated in the wide frequency range between 50 Hz and 2 kHz by the acoustic resonance synthesis, and interference from compressed airflow was avoided by the acoustic-flow separation module. Variation of the sintered flue gas PSD was obtained under different sound intensities and frequencies. Data analysis shows that the high concentration condition can greatly reduce the operation time and energy consumption. Under the action of high intensity acoustic waves with a fundamental sound pressure level of 87.3-161.8dB and duration of 3s, the measured PM2.5 removal efficiency is 16%-92%, and the optimal frequency is near 800Hz. This paper verifies the feasibility of acoustic agglomeration (AA) in the treatment of sintering flue gas, and provides a theoretical reference and technical basis for the development of PM2.5 real-time emission control device for steel production.
Study on High Temperature Chlorination Corrosion of Metallic Materials on The Waste incineration boilers
Authors: Zhai Wei , Yang Bo , Zhang Shuanghong , Ni Jinfei , Li Shiping , Li Yue
Published: March 2020

There's a growing concern about the phenomenon of high temperature chlorination corrosion on the waste incineration boilers by researchers. This paper discusses the corrosion features of chlorination corrosion for metallic materials at high temperature, explore the mechanism of high temperature chlorination corrosion, analyze the main factors of effect chlorination corrosion, and preventive measures for the resistance to high temperature chlorination corrosion were proposed.
The Effect of Meteorological Factors, Seasonal Factors and Air Pollutions on the Formation of Particulate Matter
Authors: Chen Cai , Li Wei , Dong Leilei , Li Xiyuan
Published: March 2020

To investigate the effect of meteorological factors, seasonal factors and Air Pollutions on the formation of particulate matter (PM2.5) in Jinan, China. Nonlinear dynamic inversion model was established to analyze the effect of meteorological factors, seasonal factors and CO, PM10, SO2, NO2, O3 on PM2.5 formations in different seasons. Temperature has a great influence on PM2.5 concentration variation. Precipitation exacerbate the formation of PM2.5 in Winter. Wind speed make a little contribution to PM2.5 formation in Jinan during different season. The formation of PM2.5 was influenced by confounding factors.
Combined MgO nanoparticle and microwave pre-treatment on biogas increase from Enteromorpha during anaerobic digestion
Authors: Shi Yue , Huang Kaiguo , Feng Ruizhe , Wang Renjie , Liu Guobing , Zaidi Asad A. , Zhang Kun
Published: March 2020

This study evaluated the anaerobic digestion of MgO metal-oxide nanoparticles combined with microwave pretreatment to increase biogas production from microalgae. The result shows the maximum total biogas yield of 342ml and 320ml were achieved by the MW pretreatment of 800W, 4min +15mg/L MgO NPs group and 600W, 6min +5mg/L MgO NPs group, which are 1.38 and 1.30 times compared to control, respectively. The influence of metallic oxide (MgO) NPs and MW pretreatment on anaerobic digestion of Enteromorpha resulted in significant increase in cumulative biogas production. The modified Gompertz equation and Logistic function model were used to simulate the nanoparticle-enhanced anaerobic digestion process, which demonstrate that the modified Gompertz equation can better simulate the fermentation process of microalgae.
The investigation and simulation of the UVOM ballast water treatment device
Authors: Shi Yue , Wang Yinhao , Jing Shuo , Lu Zheng , Wang Xixi , Zhang Shun , Wang Gaoshuai , Li Jianing , Zhang Kun
Published: March 2020

The marine environments are threatened by discharged wastewater from ships, especially ballast water. In this study, a novel ballast water treatment device (UVOM) was designed and operated for ballast water treatment. The main process of UVOM consists of membrane filter, venture tubes, the UV catalytic TiO2 unit and an ozone generator. Salinity, flow rate and UV intensity was investigated for their efforts on process efficiency. Results indicated that salinity cause less effects on the removal efficiency of UVOM, and flow rate and UV intensity played more important roles. For UV intensity of 50 W and the flow rate no more than 200 L/h, and UV intensity of 75 W and the flow rate no more than 400 L/h, the discharged ballast water can meet the D-2 standard. Back propagation neural network (BPNN) was constructed for simulating the process performance, and it can better describe the process with less deviation between predictive values and real values. The deviation of the total bacteria was from 4.14% to 6.16%, and the deviation of E. coli was from 3.6% to 7.2%. In addition, the results showed that the relative importance of flow rate (65.96%) was significantly larger than UV intensity (34.04%).
Catalytic Oxidation of Toluene from Textile Printing and Dyeing Heat Setting Machine
Authors: Zhong Shaotao , Chen Dingsheng , Zhong Peiyi , Li Yiting , Chen Zhihang , Cen Chaoping
Published: March 2020

A series of different catalysts were prepared by impregnation method using P25 (nano-titanium dioxide), Mt (montmorillonite) and ZSM-5 as supports, and Mn, Cu, Ce, Co and Fe as active components. The effects of catalytic oxidation were investigated to investigate the factors affecting the catalytic oxidation of toluene. The catalysts were characterized by BET, XRD and SEM. The surface morphology and pore size and pore volume were observed. It was found that MnCu0.5Ce2On/P25 had the best removal effect on toluene under the condition of 3% O2 and temperature of 240 °C. Combined with the characterization results, the pore size and pore volume are relatively large, which is beneficial to increase the selective adsorption of toluene and increase the dispersion of active components, so that the metal oxide of the active component is uniformly dispersed on the surface of the catalyst, and the catalyst is increased. The surface active site enhances the performance of catalytic oxidation of toluene.
Preparation and application of VOCs adsorption materials in textile industry
Authors: Chen Dingsheng , Xu Zhiyuan , Zhong Shaotao , Chen Zhihang , Cen Chaoping
Published: March 2020

A series of HMS molecular sieves with different pore structures were prepared by using dodecylamine and octadecylamine as template and tetrabutyl orthosilicate as silicon source to study the different pH values and temperatures. Adsorption performance. The physicochemical properties of HMS molecular sieves were characterized by BET, XRD and SEM. The results showed that the HMS molecular sieve material synthesized by dodecylamine as template was obtained after standing for 12 h in water bath for 12 h, pH 2 and calcination temperature was 550 °C. The best adsorption effectis HMS molecular sieve material synthesized by octadecylamine as template agent has the best adsorption effect when the aging time is water bath for 24 h, pH is 10, and calcination temperature is 550 °C. The adsorption rates are up to 71.72% and 74.78%, respectively.
Optimization of Protein Extraction from the Low Organic Residual Municipal Sludge Waste
Authors: Liang Xiaohui , Zhao Yuxiao , Si Hongyu , Hua Dongliang , Dong Tongxi , Liao Wei , Zhang Bin , Liu Suxiang
Published: March 2020

In this study, municipal sludge waste was used for protein extraction. Two pretreatment ways such as acid and alkaline hydrolysis were compared and the alkaline hydrolysis method was selected as the better way for protein extraction from the residual sludge. In order to obtain the optimal condition for protein extraction, the factors such as NaOH concentration, NaOH solution volume and pretreatment period were selected and optimized by response surface methodology, and the optimal condition for protein extraction was obtained: NaOH concentration was 3.85 mol/l , 24.0 g wet municipal sludge waste was added in 1 L of water, and the pretreatment period was of 12.16 h at 50 °C. Under the optimal extraction condition, the protein extraction yield could reach 5923±107 μg/g sludge, which were 2.07 folds than the initial production pretreated by NaOH.
Microbial Risks in Household GAC Filters Increased with Residence Time
Authors: Fu Jiannan , Chen Yucheng , Wang Yi , Ding Jian , Zhao Xiaolan , Yu Yingjun , Wei Weizhi , Chen Xiao
Published: March 2020

The research studied microbial contamination in household GAC filters with residence time. Initial GAC effluents were collected and stored in different circumstances (glass cup, silver cup and new GAC), Bacterial growth in GAC effluents and stored samples were detected during the 3-day residence time simultaneously. Besides, microbiome diversities in the GAC unit were measured for one month. Three main conclusions were found: (1) the maximum microbial counts were higher in storage water than in GAC filters. (2) The growth rates were faster in filters than those in storage water in a shorter residence time and the microbial risks were apparent initially. (3) The pH level decreased with residence time and the oxidation properties increased due to the desorption of GAC. The research provided useful information for optimizing household purifiers usage.