bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical modelling of traveling salesman problem (TSP) by implementing simulated annealing and genetic algorithms
Authors: Puspita F M , Meitrilova A , Yahdin S 
Published: May 2020

AbstractThe Traveling Salesman Problem (TSP) is very well known as one of the optimization problems of circuit of Hamiltonian , which will seek for the shortest route that must be passed by a number of city salesmen exactly once and will return to the initial city. Genetic Algorithm (GA) and Simulated Annealing (SA) are one method that can be used in TSP case. Fertilizer distribution at PT. Sahabat Mewah dan Makmur (SMM) in Belitung which is one of the branches of PT. Austindo Nusantara Jaya Group does not yet have an optimal fertilizer distribution schedule, where when fertilizer will be distributed from the starting point of distribution to the location of storage warehouses, it is not determined which location points will receive delivery, shipments are made to warehouse locations that still have enough storage space or stacked in the nearest warehouse. PT.SMM distributes fertilizer from Port of Tanjung Pandan to warehouses in Jangkang, Balok, Ladang Jaya, Sari Bunga, and Aik Ruak. The results show that in the GA of 120 routes, there are 8 routes with a distance of 175 km; In SA, the shortest distance is equal to GA, which is 175 km.
Analysis of student’s proof construction on exponents
Authors: Nurfadilah F , Hapizah  , Scristia  
Published: May 2020

AbstractThis research is a descriptive research that aims to describe the construction of student’s proof on exponents. Proof construction is compiling proof from a statement based on the definitions and rules used. The subject of research were students of class X IPA from SMAN 10 Palembang which consisted of 38 students. The learning process takes place according to the steps of direct learning. The technique of collecting data that used on this research was written test consisting of three problem descriptions. The collected data were analyzed by evaluating the proof of the student work consisting of three assessment categories as follows: Arguments are valid and are proof (K1), general arguments are valid but not proof (K2) and cannot strive to be a valid general argument that is an invalid or incomplete (K3).The research result shows that the construction of student’s proof on exponents was still in the K3categories, with details as follows: Students categorized K1(Arguments are valid and are proof) are 38.6%, students categorized K2(general arguments are valid but not proof are 17.5% and students categorized K3(cannot strive to be a valid general argument that is an invalid or incomplete) are 43.9%. Students who are categorized K1as a whole are able to perform constructive proof properly. Students categorized K2are still not able to perform constructive proof caused by mistakes in mathematical manipulation so that it shows the illogical thing. Students who are categorized K3are still not able to perform constructive proof caused by not being able to utilize the definitions and rules to be used in proving so that the proof done is invalid or unfinished.
High school students’ modelling ability in creative problem-solving
Authors: Esterlina  , Hartono Y , Hiltrimartin C , Indaryanti  
Published: May 2020

Abstract
This research is a descriptive study to see the application of the Creative Problem Solving learning model in the learning process and the problem-solving abilities of students in linear programming. The study was conducted at one of the high schools in Palembang with the subject of all students in class XI MIA 5. The learning process was adjusted to the phases of the Creative Problem Solving model. Researchers use problem-solving questions on the student sheet and test questions. Data collection techniques in this study using the results of student worksheets.
The effect of creative problem-solving models on students’ higher level thinking skills in linear programming
Authors: Adila R , Hartono Y , Indaryanti  , Scristia  , Yusup M 
Published: May 2020

Abstract
The purpose of this study was to determine the effect of Creative Problem Solving (CPS) on Higher Level Thinking Skills of Grade XI students in High Schools in Linear Programs. This research was carried out in SMA Negeri 5 Palembang. This research method is quantitative with only a control group posttest design. Regarding the experimental class will be given with Creative Problem Solving while the control class will be given with cooperative learning. High-level Thinking Skills are postal measurements and data will be analyzed by t-test. The results of the study said higher-order thinking skills in the experimental class were higher than the control class. This means that CPS influences Higher Level Thinking Skills in Class XI of SMA Negeri 5 Palembang in linear programming.
Development of mathmodule based on local wisdom and 21stcentury skills: linear equation system
Authors: Pujiastuti H , Suvati DA , Haryadi R , Marethi I 
Published: May 2020

AbstractThe purpose of this research is to develop a math module that emphasizes aspects of local wisdom and 21stcentury abilities. Procedure in this study refers to the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model. The instruments used in this study are using test and non-test. Non-test instruments used in the form of a questionnaire to determine the assessment of experts and a questionnaire to determine student responses, while the test instrument is used to determine the feasibility of the product based on the percentage of student mastery learning. In this study involving media experts and content experts from teachers and lecturers who are experts in their respective fields. The number of subjects in this study were 29 students. The results showed that the percentage score obtained from media experts 93.81%, from material experts 87.56%, student responses 84.56%, and percentage of total students who achieve mastery learning 75.86%. In addition, the effectiveness test showed that the average of student learning outcomes above the passing grade score. Based on these results it can be concluded that the Math Module is feasible to use and can be used as teaching material in the learning process for teachers and students.
Students’ mathematical modelling skills with the model eliciting activities (MEAs) approach on material number patterns
Authors: Suryanto D , Hapizah  
Published: May 2020

Abstract
This research aims for obtain a description of the student’s mathematical modelling skills after the MEAs approach was applied to the material of number patterns. This type of research is a descriptive research study to the grades VIII.1 of SMPN 56 Palembang with the total number of 27 students. Data collection techniques are carried out with written tests, interivews, dan observation. Test questions is arrenged based on indicator of the skills of mathematical modelling, interviews were conducted as supporting data from test results, while the observation is done to see the approach process in MEAs during the learning. Based on the research result of obtained an information that the mathematical modelling skills to the grades VIII.1 of SMPN 56 Palembang are in good category with an average of 78.29. There are 17 students with a very good categories, 6 students with a good category, 3 students with sufficient categories, and 1 student with poor category. The result of interview showed that students are be able to identify the problems related to the patterns of numbers, but in the process of creating a mathematical model is still a difficult task, because the students do not remember the previous material, in solving the problems and in reinterpreting the mathematical results obtained there are students who are unable to do so. The process on the component apporach MEAs namely component newspaper article, readines or warm-up questions, the data tabel or mathematical information, and problem statment stimulate students’ mathematical modelling skills.
Measuring biology educations students’ critical thinking skill using online systems
Authors: Anwar Y , Permata S , Ermayanti  
Published: May 2020

Abstract
The times always had implications for the education, not least the trend of the industrial revolution 4.0. Therefore, students must be able to compete and use technology intelligently and appropriately. It is the obligation of educators to be able to equip and develop skills for students, so that they have high competitiveness. These skills can be in the form of critical and creative thinking skills. The aims of this study is to Measuring students’ critical thinking skill Using online systems. These skills can be measured quickly and precisely through online test, which is currently in line with the era of the industrial revolution 4.0 which emphasizes the internet of things. This measurement is carried out for biology education students in the first semester. The measurement results show that the critical thinking skills of biology students in grade one are still low. The categories of critical thinking skills that most high is the ability to Ask and answer questions the scores achieved by 63.3%. While the lowest category is create and determine the results of consideration with a score of 51.6%.
Use of bungee jumping with stem approach to improve science process skills
Authors: Haryadi R , Pujiastuti H 
Published: May 2020

Abstract
The purpose of this study is to make bungee jumping as a teaching aid or learning medium by using the STEM approach to the material of straight-line equations. The method used in this study is the experimental method using one post-test group design. In this study, students create projects, then students are guided to make bungee jumping. The process of making this bungee jumping goes through several stages which include the planning stage, the implementation phase, the report writing stage, and the presentation stage. The results of the project were assessed as feasibility of science process skills. The assessment is carried out at each stage of the process of making bungee jumping, starting from the planning to the presentation stage using a special assessment rubric. Learning using the STEM approach is expected to be able to build and develop students so that they not only memorize concepts, but are also guided to be able to integrate science, technology, engineering, and mathematics so as to improve students’ science process skills. The results show that making bungee jumping through the application of the STEM method can improve students’ science process skills in both categories by 79.13%.
Potential energy of mechanical system dynamics with nonholonomic constraints on the cylinder configuration space
Authors: Ariska M , Akhsan H , Muslim M 
Published: May 2020

Abstract
The formulation of the dynamics of a mechanical system can be done by the method of the Port Controlled Hamiltonia System (PCHS), but this method still leaves a Lagrange multiplier. Furthermore, the dynamics can be formulated using another method which is more systematic, namely the Routhian Reduction method. The method illustrates a system that is subject to non-holonomic constraints and external force, so that the Lagrange multiplier can be removed from the equation. Before formulating the dynamics of a non-holonomic mechanical system, the researcher will analyze the potential energy that occurs in a system that moves in the cylinder configuration space. Potential energy is the main part that must be completed to formulate the motion system of an object, because Routhian reduction only reviews the kinetic energy and potential energy in a dynamic system. The dynamical system reviewed is an object that moves both translation and rotation with a non-holonomic constraint, namely the Tippe Top (TT). The author analyzes the potential energy of a mechanical system that moves in a cylinder configuration space with non-holonomic constraints. Method in this research is a mathematical theoretical study. This method can reduce the equation TT’s motion with and without friction that moves on the surface of the cylinder clearly in the form of a set of differential equations. According the result of this riset, the potential energy for the TT with non-holonomic constraints that move on the surface in the tube can be determined by U = mg(r(1 − cos ρ ) + (R − acos θ ) cos ρ + asin θ cos φ sin ρ), transforming the TT’s Lagrangian that moves on a flat plane (Cartesian coordinates) to the tube coordinates, with reference to the height of the plane solved by coordinate transformation.
Development of ball capture test based on vibration sensor
Authors: Hartati  , Destriana  , Aryanti S 
Published: May 2020

Abstract
The purpose of this research is to produce a ball-to-wall throwing sensor based vibrating sensor that can be used to calculate coordination. This study uses an R&D research method developed by Borg and Gall. The subjects of this research trial were 28 physical education students, one test and measurement experts and one electronics experts to validate of the equipment test. The validation results obtained an average value of 80% so that a valid tool for further use of the trial was held to find that the catching device that was made could work as it should even though there was an error of 1.8% so that it could still be tolerated. This tool can be used as a wall ball throwing test tool to test athletes, students, or students so that it can facilitate tests conducted by teachers and trainers.
Development of authentic assessment model in the field of mathematic for early childhood in Palembang City
Authors: Syafdaningsih  , Suningsih T 
Published: May 2020

Abstract
The focus of this research is to develop a valid and reliable of authentic assessment models in the field of mathematic for children aged 6-7 years. This research is Research and Development (R&D) that produce the product in the form of authentic assessment model in the field of mathematic for early childhood. This product is standardized through expert validation. The step of this research is planning, development, and evaluation. Data were analysed using formative evaluation consists of expert review, one to one evaluation, and small group evaluation. The result of the research shows that the model of authentic assessment in the field of mathematic for early childhood has been produced.
Designing technologies for the interaction of cyber-physical systems in smart factories of the Industry 4.0
Authors: Zakoldaev D A , Shukalov A V , Zharinov I O , Zharinov O O 
Published: May 2020

Abstract
An actual task is to project industrial purposes cyber and physical systems interaction technologies in the Industry 4.0 smart factories. Three cyber and physical systems interaction options are described (mechanical, informative and man and machine) which are applied in the item designing components manufacturing technological process. A scheme of system projection route is proposed for the cyber and physical interaction technologies. A scheme of system projection route is proposed for digital production cloud resources (services and applications) which are applied to realize automatic informative interaction for cyber and physical systems digital twins.
The specifics of training for the industrial sector in the context of digitalization
Authors: Kudryavtseva S S , Shinkevich M V , Malysheva T V , Ishmuradova I I 
Published: May 2020

Abstract
The article provides an overview of the main trends in training for the industrial sector of the economy in the context of digitalization. The purpose of the article is to develop methodological tools for identifying areas of development of the knowledge economy in industrialized countries. Based on the methodology of cluster and correlation-regression analysis, the positioning of national economies in the theoretical space was carried out on the basis of indices - International Talent Index (GTI) and the Knowledge Economy Index. Based on the study, it is shown that, according to integral indicators, the position of the Russian economy in terms of the level of intellectualization and digitalization of the economy requires increasing financial, institutional and staffing to increase its competitiveness and adequacy to the trends of the global industrial system. The materials of the article can be used in the development of the main areas of training for the industrial complex of the national economy in the context of its digitalization.
Energy consumption of water supply system’s utilities in building
Authors: Khokhlov V , Razakov M , Razakova R 
Published: May 2020

Abstract
Authors have continued the study of the energy consumption in the building by various engineering systems in this work. The energy consumption of new engineering system, which was previously not taken into account in the total energy consumption of the building, is investigated. There is discusses the consumption of both electric and thermal energy by the building’s cold water supply system. The share of the cold water supply system in the specific thermal and electrical characteristics of the general water supply system (hot and cold parts of the water supply) of the building has been determined. Also, there is a special attention to the passive consumption of thermal energy by the cold water supply system, which was not previously carried out due to its small share in the total heat consumption of the building in this article. In this case, the “active heat energy” is used by the hot water supply system, which, despite the cold, must be forcedly heated in a special installation. Also, there is in this technique, takes into account seasonal fluctuations in the temperature of cold water by dividing the consumption of thermal energy into winter and summer periods of the year. It is also possible to do the full analyse the work of the frequency regulators widely used for the building’s water supply system, but it should also be taken into account that the regulators have additional energy costs which is depending on various operating modes (standby mode, regulation mode, etc.) . In this paper, authors consider only in systems where is only booster pumps, mechanical flow meters, and non-automated valves are installed. The objects in which this study was conducted are: a residential building and a low-capacity pumping station (up to 2000 m3 / h).
The economic performance of diesel engine when operating on methanol with a dual fuel supply system
Authors: Anfilatov A A , Chuvashev A N 
Published: May 2020

AbstractLimited reserves of fuel of oil origin and a significant increase in the price of oil and its products have made the work aimed at finding and justifying the use of alternative fuels relevant. Among the latter, methanol occupies an important place, for the production of which raw materials are available on a large scale. Methanol can be obtained from natural gas, coal, biomass, or urban waste. Methanol can be attributed to renewable energy sources. It should be noted that the development of a fundamentally new engine model that meets modern environmental and economic requirements requires long-term research and high material costs, so our research is aimed at upgrading commercially available engines. The article presents the results of implementing a method for using methanol by feeding it directly into the combustion chamber and igniting it from the igniting part of diesel fuel. The economic indicators of the developed diesel engine when working on methanol under different load conditions are analyzed.
On the role of hydrated calcium carboaluminate in the improvement of the production technology of alumina from nephelines
Authors: Siziakova E V , Ivanov P V 
Published: May 2020

Abstract
The coagulation properties of HCCA in the system “aluminate solution - nepheline sludge” were studied, which allowed to improve the processes of thickening and washing of nepheline sludge. Solutions were developed aimed at the improvement of the coarse alumina production technology on the basis of increasing the efficiency of the carboaluminate method for separating Al (III) and Si(IV) hydroxo complexes and using the combined crystal growing modifier CaCO3 – HCCA.
Model for selecting test methods of detecting fraudulent electronic components
Authors: Shchenikov Ya A , Michurin S V , Sidorov V O 
Published: May 2020

Abstract
The article deals with the issues of electronic components incoming inspection processes risk management. A comparative analysis of the cost of using instruments used to identify fraudulent electronic components is carried out. A model developed using principles similar to FMEA-analysis is presented to select plans for detecting counterfeit and fraudulent electronic components based on the influence of factors such as the size of the batch, the criticality of application, and the source of supply.
Metrological support of diagnostic complexes for assessment of technical conditions
Authors: Skoriantov N N , Tselms R N , Okrepilov M V , Yu Litvinov B , Stepashkina A S 
Published: May 2020

Abstract
This article is dedicated to main aspects of implementation of monitoring of vibration in power equipment. An example of planning of current repairs for the analysis based on diagnostic signs is illustrated. The probable frequency ranges and magnitude of the increase in vibration levels of mechanisms for various operational defects are demonstrated. The requirements for the system of metrological support of diagnostic complexes are noted. The normalized metrological characteristics of measuring channels for diagnostic complexes are listed. The interface of a promising diagnostic complex for assessing the technical condition of rotary equipment is presented. The conclusion about the economic efficiency of the use of diagnostic systems with standardized metrological characteristics of measuring channels for monitoring of technical condition of rotor equipment is made.
A study of problematic issues in information resources integration in Russia
Authors: Vorobyov A A , Yanovitch K V , Rudenko R V , Shabaev R R , Levchenko G N 
Published: May 2020

Abstract
The introduction of computer, information and telecommunication technologies has radically changed the capabilities of management processes in all spheres of life of modern states. Large-scale automation of a wide variety of processes, monitoring of the state of objects and processes, comprehensive support of activities for preparation and decision-making in close to real time mode, allowed for a significant expansion of the scope for increased efficiency in management. Further integration of information management and telecommunication systems has made it possible to manage even more complex objects distributed geographically, due to a substantially decentralized structure and heterogeneous by its nature both in the composition of hardware and software, and in the composition and structure of information resources. Over the decades, the goals of integrating computing and information resources have gradually transformed, showing a significant dependence, on both the capabilities of computer hardware and communication systems, and additionally on the capabilities of software, up to the level of development of information technologies. Often ahead of integration opportunities, practical needs determine the need to manage increasingly complex facilities. The evolution of command and control facilities began from private processes of ensuring daily activities (or combat command and control), passing through similar processes at the level of territorial entities, ministries and departments, and in our time has led to the emergence of objects combined into a single complex structure, distributed throughout the state and intended for solving state tasks of strategic importance.