bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Ability of cadets to solve trigonometry routine and non-routine problems
Authors: Anggraini R , Putra E S 
Published: May 2020

AbstractThis research is a qualitative research, which is describe the ability of cadets to solve routine and non-routine problems of trigonometry material in applied mathematics subject. Competence of learning achievement in applied mathematics course required cadets to be able to solve mathematical problems related to trigonometry. An analysis of this ability was needed as an illustration of lecturers in developing lesson plan which is more effective and efficient. The population of this study was cadets of the ship engineering study program academic year 2018/2019 and the sample of study was three cadets chosen by random. The technique of collecting the data by using the results test of the cadets. The results of the study shown that the ability of cadets to understand problem and apply the concepts to solve routine problem was good, although not all of the information was written in their answers. The cadets’ ability to compile and carry out a plan of routine problems was quite good, even though they immediately wrote the formula to solve the problem.The ability of cadets to understand non-routine problem was not good, due to, cadets have not been able to know the additional information that must be extracted from the problem.
Student’s triangles congruence proving through flow proof strategy
Authors: Sumarni  , Hapizah  , Scristia  
Published: May 2020

Abstract
The purpose of this study is to describe students proving congruence triangles. Proving congruence is a prerequisite to develop skills in constructing formal proof in mathematics. The subject in this study are 33 students of SMP Negeri 33 grade IX.1. The Learning process implemented with flow proof strategy, namely re-writing existed information, stating what is needed to be proved, using existed rules such as postulate and definition, and writing the consequence from used rules. Data were collected by a test with three questions and interviews. The results show that students know step by step in writing the proofs after the implementation of flow proof strategy and students’ ability on congruence proving in class nine SMP N 33 Palembang categorized satisfactory, with 4% of the students categorized as excellent, 16% in good, 48% in satisfactory, 24% in poor, and 8% in very poor category. Generally, students’ obstacle in proving is in determining rules that will be applied for constructing a proof and not understand what is to be proof. Other error in proving is writing symbols.
The development of HOTs problems on probability and statistics for middle school
Authors: Ansari A , Somakim  , Darmawijoyo  , Eliyati N 
Published: May 2020

Abstract
The lack of using high-level thinking questions (HOTs) in schools requires Indonesian students to be less successful in solving problems that demand that ability. To improve the quality of education, the government revised the curriculum which in its development refers to one of the aspects that must be raised in the learning process is HOTs. This research aims to produce valid and practical as material for student’s training and see the potential effects of these questions on students’ mathematical literacy abilities. This study uses the design research method for the type of development study with eighth-grade students of SMP Negeri 1 Palembang as the subject of the research. The results of the study showed that the HOTS problem developed discussed material aspects, constructs, and languages that were declared valid and practical and were feasible to use.
The reciprocal teaching model as the latest solution to improve students’ mathematical representation ability
Authors: Retta A M , Nopriyanti T D 
Published: May 2020

Abstract
This study aims to examine the improvement in students’ mathematical representation (KRM) after the application of the reciprocal teaching (RT) model. The RT learning model is a group learning process which in its implementation uses four strategies namely 1) concluding, 2) making questions, 3) clarifying, and 4) predicting. This study uses a quasi-experimental method with a non-equivalent pretest and posttest control group design. The subjects of this study were students of mathematics education study programs at Universitas PGRI Palembang academic year 2018-2019. This type of research is quantitative research in which the data were taken in the form of pretest and posttest data whose results show that there is an increase after the implementation of the RT model for student KRM. It can be seen from the n-gain test that gets RT learning models by 0.3 while those who get conventional learning are 0.2. Furthermore, a t-test was performed to see whether it was significant or not, it was found that t-count < t-table so that H0 was rejected, which means there was no significant increase in measuring student KRM.
The development of math model student worksheet using transportation context of one variable linear inequality
Authors: Anastasya Y , Darmawijoyo  
Published: May 2020

Abstract
This study aims to produce the student worksheets based on learning Mathematics modeling using a valid and practical transport context on one variable linear inequality material for class VII students, and can Aware of the potential effects of learners' mathematical perception of the development of the student worksheet based on mathematical modeling learning using the transport context of a single variable linear matter in class VII. The type of research used is the ADDIE model development method. This method consists of Analysis, design, Development, Implementation, and evaluation. The evaluation stage used is formative evaluation, namely: expert review, one to one, small group, and field test. The subject of this study was the students of grade VII at 33 Palembang State Junior High School year 2019/2020 which amounted to 28 people. Data collection techniques with walkthroughs, observations, interviews, and polls. The results of this research are the student worksheet based learning Mathematics modeling using the context of valid and practical transport and learning using the student worksheet developed to have a potential effect on participants' mathematical perception Students.
Designing creative problem solving-based student worksheet for higher order thinking skills
Authors: Sinta B , Hartono Y , Indaryanti  , Scristia  , Yusup M 
Published: May 2020

Abstract
This research is descriptive research. The purpose of this study is to produce a Higher Order Thinking Skills (HOTS) design as a creative form of high school students in class XI. In this study, the analysis was carried out first, namely the analysis of students, curriculum analysis, material analysis, analysis of higher-order thinking skills and analysis of creative problem solving and design according to the results of these analyses. The results of this study use the student worksheet design of high thinking ability using the steps of Creative Problem Solving namely problem clarification, brainstorming, evaluation and selection, and implementation.
Students’ high-level thinking skills in creative problem solving learning model
Authors: Selvia N , Hartono Y , Indaryanti  , Scristia  , Yusup M 
Published: May 2020

Abstract
This research is a quantitative research. This study aims to look at students’ higher order thinking skills to solve linear equations after learning with creative problem solving models is given. The subjects of this study were the XI grade students of SMA N 5 Palembang. The data collection technique used was a test in the form of a description consisting of three questions. Based on data analysis that students’ high-level thinking skills in learning linear equations are categorized low.
Probing prompting in symbolization
Authors: Alyawati D , Susanti E , Sari N , Sukmaningthias N 
Published: May 2020

Abstract
This study was conducted as descriptive research which purposed to find out mathematical thinking aspects of symbolization of the first secondary school through probing prompting learning strategy. The subject of this study were 6 students of class VIII.1 in junior high school. The learning proses was taken place by steps and probing prompting learning strategy. The data was collected by using test and interview which was analyzed qualitatively. The result of this study indicates that student 1 was able to bring up both indicators of symbolization, but the ability algebraic operation was still erroneous. Student 2 can bring up the indicator of symbol manipulation.
Blended learning with schoology in learning macromedia flash-based instructional media
Authors: Sari N , Fitriasari P , Octaria D 
Published: May 2020

Abstract
Macromedia Flash, one of ICT program, is an animation program that can be explored to design instructional media. However, time allocation in the class is not sufficient to facilitate students for understanding how to design and work with Macromedia Flash. Blended learning is carried out to facilitate student learning in the classroom and online class. Online class is using Schoology as learning platform so that students can learn anytime and anywhere. This study aims to describe how the process of blended learning using Schoology in teaching Macromedia Flash-based instructional media for mathematics education students of Universitas PGRI Palembang and how students’ responses. Qualitative and quantitative descriptive research method is used. Data was analyzed from documentation, questionnaire, and interviewing. The results show that blended learning using Schoology can be employed by students to learn, practice, and discuss material of Macromedia Flash-based instructional media from inside and outside class. It also facilitated students to collect their task. Most of students can produce Macromedia Flash-based instructional creatively. Students give very good response to the implementation of blended learning using Schoology about 82.19%.
In-service teachers’ mathematical problem solving skills
Authors: Hiltrimartin C , Hartono Y , Indaryanti  
Published: May 2020

Abstract
This study aims to describe the problem-solving skills of in-service teachers. The background of this study is because teachers are less concerned with developing problem-solving skills and rarely gave problem-solving problems. The research method used is a qualitative method. The research subject are the in-service teacher. The data collected with the test technique, in the form of a problem-solving item. The results showed that the ability of teachers in large solutions is still lacking because teachers still have difficulty.
Problem-based learning for measuring representation ability
Authors: Wahyuni E D , Susanti E , Sari N , Simarmata R H 
Published: May 2020

Abstract
The research is descriptive qualitative which aims to describe mathematical representation ability of students in class 11 with problem-based learning models on geometric sequences and series. The instruments used in this study were students’ worksheets, test questions, lesson plans, and teaching materials. In this research, it can be concluded that mathematical representation ability of students through the learning with Problem Based Learning (PBL) method comes up. The students do all the aspects of mathematical representation, which are the visual representation, numeric representation, symbolic representation, and algebraic representation. The dominant parts which appear are the visual representation, symbolic representation, and algebraic representation. The mathematical representation ability which rarely shows is the numeric representation. It also means that the form of the question also affects students in deciding what mathematical representation aspect to be used.
Development of student worksheets based on problem-based learning in the algebra topics
Authors: Santoso B , Coaline A C , Scristia  , Araiku J 
Published: May 2020

Abstract
This research uses design research type development study method which aims to develop worksheets based on problem based learning algebraic operating materials that are valid and practical. This study focuses on 2 stages, namely the preliminary stage and formative evaluation which includes self-evaluation, one-to-one, small group. The research subjects were 7th grade students in junior high school in developing. The results of this research are valid and practical problem-based student worksheets. Validity can be seen from the results of expert assessments and one-to-one stages. Practicality can be seen from students’ skills when understanding and completing student worksheets at the small group stage.
On how students read mathematics textbook and their view on mathematics
Authors: Oktariani D , Sari T I , Saputri N W , Darmawijoyo  
Published: May 2020

Abstract
The aimed of this paper is to investigate the correlation between reading stages on mathematics textbook and students’ view of mathematics through reading textbook. A questionnaire survey and interview were administered to secondary 3 students at SIS Palembang. The data shows that there are three different type of stages on reading mathematics textbook such as Type 1; defined by (1) Read the definition and/or rules; (2) Get into worked example; (3) Do the exercise; Type 2; defined by (2) Get into worked example;(1) Read the definition and/or rules; (3) Do the exercise; Type 3; defined by (3) Do the exercise (1) Read the definition and/or rules; (2) Get into worked example. The finding result shows that there are correlation between types of reading stages and the student’s view on mathematics. The correlation is influenced by reading objectives, student’s prior knowledge and student’s perspective.
The modified branch and bound algorithm and dotted board model for triangular shape items
Authors: Octarina S , Janna M , Cahyono E S , Bangun P B J , Hanum L 
Published: May 2020

Abstract
Cutting Stock Problem (CSP) is a problem of cutting stocks into items with certain cutting rules. This study used the data where the rectangular stocks were cut into triangular shape items with various order sizes. This study used the Modified Branch and Bound Algorithm (MBBA) to determine the optimal cutting pattern then formulated it into a Dotted Board model. Based on the results, it showed that the MBBA produced three optimal cutting patterns, which used 6 times, 8 times, and 4 times respectively to fulfill the consumer demand. Then the cutting patterns were formulated into the Dotted Board model. Minimum trim loss of the three models are 1,774 cm
2, 1,720 cm
2dan 980 cm
2.
Analysing South Sumatra red rice polymorphism using random amplified polymorphic DNA (RAPD) markers
Authors: Hanum L , Wardana S T , Alazi  , Windusari Y , Aminasih N , Patriono E 
Published: May 2020

Abstract
this research aims to determine genetic variation based on polymorphism bands and the relationship between red rice in south sumatra based on PCR- RAPD (Polymerase Chain Reaction- Random Amplified Polymorphic DNA) tecnique using the mathematical modeling application NTSys 2.1. Collecting data using observation methods where samples are collected genetic variation and presented in quantitative form. Research instruments include tools and laboratory materials that facilitate the research process such as electrophoresis, thermal cycle machines, gel documentation and others. DNA bands obtained electrophoresized PCR sample is converted into binary data which is stated by the presence or absence of DNA bands, if there is a DNA band then marked with (1), whereas if the DNA band does not appear then marked with (0). Data were analysed using the NTSys version program. 2.1. Dendrogram created using unweighted pair-group with arithmetic average with genetic similarity coefficient using Jaccard Coefficient of Similarity and presented in the form of dendrogram. Based on the DNA band profile of RAPD results which 43 DNA bands show polymorphism (93.47%). Based on the analysis using the NTSys 2.1 program, a dendogram was obtained where red rice in South Sumatra was divided into two main clusters at a genetic similarity coefficient level of 0.19, namely cluster A consisting of red rice with CT code (Cahya Tani) and cluster B consisting of red rice SJ code (Sumber Jaya), SP (Sp Padang), and K (Kelirejo). The four red rice individuals taken from different places have a low genetic similarity coefficient of 0.15-0.37, meaning that the fourth genetic variation of red rice is very high.
How to support pre-service teachers’ conceptual understanding using hyperthermia as STEM context: a case study in sciences education department Universitas Sriwijaya
Authors: Ismet  , Darmawijayo  , Aisyah N , Nawawi E , Yusup M , Meilinda  
Published: May 2020

Abstract
This study aims to identify teachers’ conceptual understanding in science content using hyperthermia context. The hyperthermia context is used as a pilot project to develop STEM in Mathematics and Science Education Department. This study is a descriptive study involving 42 freshman science pre-service from Biology, Physics and Chemistry Education. The instrument used is 8 essay questions on the context of hyperthermia but requires mastery of radiation, conduction, convection and evaporation on physics content, endothermic and exothermic content on the chemical content and the principle of homeostasis in biological content. From the results of this study obtained data that the pre-service science teacher students (Biology, physics and chemistry) have difficulty to connect issues of nuanced hyperthermia context to the content of physics, biology and chemistry because the prerequisite content that has been learned by the students has never been integrated in the context of hyperthermia, but even thought they have difficulty on it, the hyperthermia have a potential to grow intuitive skill.
Nonequilibrium carbon black suspensions used in synthesis of polymer composite material
Authors: Stebeleva O P , Kashkina L V , Petrakovskaya E A , Rubleva T V , Nikitin S L , Vshivkova O A 
Published: May 2020

Abstract
Nowadays polymer matrix-based composite material with various carbon fillers are widely used to protect radioequipment from different interference, to improve characteristics of radar absorbing coatings. Current synthesis processes are sophisticated and rather costly. The challenge is to develop new methods of producing composite materials by efficient knowledge intensive technologies to reduce the cost of products. The paper studies possibility of producing composite material on the basis of elastic polyurethane foam with carbon fillers using polyurethane impregnation in nonequilibrium black carbon suspension. Suspension composition: running water and carbon-bearing powders of nanometer range: fullerene black carbon, Taunite (multi-layer carbon nano tube material), technical carbon T900, wood soot. Nonequilibrium suspension was produced by treatment in hydrodynamic generator of rotor type (cavitation mode). Angular rotation speed of the rotor ω = 10000 rpm.
CALS conception for the educational program at the university in the study of metrology and other technical disciplines
Authors: Bronov Sergej , Stepanova Elena , Katsunova Anastasiya , Volkov Maksim , Sizov Pavel , Panikarova Nadezhda 
Published: May 2020

Abstract
The educational program at the university is designed taking into consideration the university wishes and the requirements of regulatory documents. The basis of the training program is the curriculum. It contains academic disciplines with the appropriate parameters: a semester, a number of credit units, the number of hours for classroom work, types of classes. For its implementation the resources are used: a lot of teachers (in departments), a lot of students (in groups), a lot of classrooms (for classes), a lot of equipment (of various types), a lot of training materials, a lot of e-learning courses. Many academic disciplines are combined with each set of resources. Each resource has its own parameters. To allocate the resources, these parameters and many conditions should be considered. This is a multi-criteria optimization task. The resource parameters and restrictions can change during the educational program’ functioning. It requires the development of a new educational program plan. This can be done using the concept of Continuous Acquisition and Life-Cycle Support (CALS) which is widely used in industry but not in education. The CALS concept is based on the use of automated information systems.
Development of intellectual complex for adaptive control of microclimate parameters of flour storage processes
Authors: Muravyova E A 
Published: May 2020

Abstract
In the modern socio-economic and geopolitical development of Russia, the development of agriculture and food industry comes to the fore. As a result, the requirements to the quality and safety of the finished product increase many times, which significantly affects its competitiveness. Storage of flour is one of the most important stages of the technological process of flour production. Bulk storage of flour in silos is a complex technological process, which is largely affected by the environment (temperature, pressure, humidity, etc.).Today, neural networks can solve a wide range of data processing and analysis tasks – pattern recognition and classification, prediction and management. This article presents the development of an intelligent complex for adaptive control of microclimate parameters of flour storage processes and improving the efficiency of management of technological processes of flour storage through the use of intelligent technologies. A mathematical model of the control object was developed taking into account the inherent internal relationships between the parameters of the technological regime and external perturbing factors. Processing of research results was carried out using the software “MatLab”.
Process control system based on a fuzzy controller
Authors: Muravyova E A , Stolpovskaya Y V 
Published: May 2020

Abstract
The object for the control system is an electrolysis plant for the production of chlorine, hydrogen and electrolytic alkali by the method of diaphragm electrolysis. It is necessary to develop an improved system for controlling the process of diaphragm electrolysis. To create a control system for the electrolysis process, a fuzzy controller with the following output parameters was developed: the percentage of opening of the electromagnetic valve for supplying NaCl solution to the electrolyzer, the percentage of opening of the actuator for supplying asbestos suspension, the percentage of opening of the control valve for draining NaCl solution through a special device, voltage value. Control output parameters control input parameters: anolyte level and caustic concentration. Controlling of the output parameters is based on the information received from the input sensors of the concentration of caustic and the level of anolyte. The control algorithm modeling is performed in the Matlab package. The programming of the Modicon M340 controller and its connection is made using the Unity Pro CASE system. An automated workstation for controlling the electrolysis process is performed in the Vijeo Citect SCADA system. The introduction of a multidimensional automated control system that controls the entire electrolysis process allowed us to solve the problem posed: optimal control of the process output parameters.