bluuebunny/crossref_metadata_2025 huggingface dataset:
Designing mathematical problems task through COVID-19 context
Authors: Ambarita S M , Zulkardi
Published: October 2020

This study aimed to produce PISA model mathematical problems for junior high school students using a valid and practical Covid-19 context. The research method used is design research with the type of development study. At the preliminary stage, a review of literature and design has been reviewed. Meanwhile, the formative evaluation phase only reaches the stage of self-evaluation, one to one, small group. Data collection techniques used were walkthrough, document review, and online interview. The problem developed in this study is related to the number of hand sanitizers that can be made based on available ingredients. The data analysis applied is descriptive. The result of the research is in the form of mathematical problems using a valid and practical PISA model COVID-19 context with 3 items in total. From the validation result in terms of content, constructs, and language based on the validator and one to one assessment, the PISA type mathematics problem with the context of Covid-19 has valid content, construction, and language. Practically, based on small group trials where all students can understand the purpose of the problem well, the students’ thoughts easy to read and do not lead to diverse interpretations.
Optimal control of plant disease model with roguing, replanting, curative, and preventive treatment
Authors: Anggriani N , Amelia R , Istifadah N , Arumi D
Published: October 2020

In this paper, we determine the optimal control of plant disease model with roguing, replanting, curative, and preventive treatment using the Maximum Pontryagin principle. Numerical simulation results show that the procedure can reduce the population of infected plants. Therefore, controlling by roguing, replanting, curative, and preventive treatment is highly recommended to increase the number of susceptible, removed, and protected plants.
Ethnomathematics: Disclosing mathematical concept in batak toba traditional house
Authors: Hidayat E , Ratnaningsih N , Sunendar A , Siregar J S
Published: October 2020

Ethnomathematics is mathematics that grows and develops in a particular culture. Technological advancement makes culture more forgotten, especially in traditional buildings such as traditional houses. Traditional houses contain philosophical values that are used as guidelines for the life of the surrounding community. Unconsciously in traditional house buildings have applied various mathematical concepts in the building. This study aims to reveal the mathematical concepts and philosophical values found in the traditional Toba Batak houses. The method of research conducted in the ethnographic approach. The source of research data was obtained from three speakers: customary kings, building experts, and residents (elders). The instruments in this study were researchers themselves and guidelines for semi-structured interviews—data collection techniques obtained from observation, discussions, and documentation. Testing the validity of the data is done by source triangulation. In this study, it was found that there was an application of mathematical concepts in traditional Toba Batak houses. The mathematical theory consists of a dimensional geometry concept, two-dimensional geometry, three-dimensional geometry, geometric transformation, and number patterns. Each of the forms contained in the traditional Toba Batak house contains philosophical values that are used as learning resources.
What is the relationship between self-regulated learning and students’ mathematical understanding in online lectures during the covid-19 pandemic?
Authors: Lestari W D , Aisah L S , Nurafifah L
Published: October 2020

Covid-19 pandemic forced online lecturing and learning from home (LFH) to be carried out on all campuses in Indonesia. One obstacle in implementing LFH is how students can organize themselves so they can learn well from home. Based on observations in class, students who can manage their learning (Self-Regulated Learning, SRL) well tend to better understand the mathematical material provided. Mathematical understanding is very important because it becomes the basis for students to be able to master other higher mathematical abilities. The purpose of this research is to determine the relationship between self-regulated learning and students’ mathematical understanding in online lectures during the covid-19 pandemic. This research is qualitative descriptive research. The subjects in this research were 14 students contracted discrete mathematics courses on mathematics education department at Wiralodra University in the 2019/2020 event semester by purposive sampling technique. The instruments of this research were self-regulated learning questionnaires, mathematical understanding tests and interviews. Data analysis consist of data reduction, data display, and conclusion drawing/verification. The results showed that there are directly proportional relationship between self-regulated learning and students’ mathematical understanding. Based on these findings, it is necessary to apply self-regulated learning strategies in lectures to improve students’ mathematical understanding.
Analysis of mathematics student understanding: calculus concepts
Authors: Muhassanah N , Lukman H S
Published: October 2020

The purpose of this study is to find out: (1) how well mathematics students in semester 2 of the academic year 2018/2019 UNU Purwokerto understand the concept of calculus 2, (2) the things that cause students’ difficulties in understanding the concept of calculus. The method used in this research is qualitative with descriptive methods. Furthermore, the technique of determining the source of data is using purposive sampling. The number of students selected as research subjects consisted of 12 students in the semester 2 mathematics study program year 2018/2019; in which 3 students were in the medium category and 9 students were in a low category. Meanwhile, there are 4 subjects chosen for the interview: 2 subjects of the moderate category and 2 subjects of the low category. There are two data taken in this study, they are the results of the conceptual understanding test and the results of the interview. Later on, the results of the tests and interviews will be validated by using triangulation methods. Based on the results and discussion of this study, the following conclusions are obtained: first, mathematics students’ understanding of the concept of calculus consists of a high category of 0%, a medium category of 25%, and a low category of 75%. Therefore, it can be concluded that the understanding of the concept of mathematics calculus for semester 2 students in 2018/2019 academic year is still low. The analysis of the understanding of the calculus concept of students of mathematics study program shows a higher understanding of integral material and lower on using the integral material. The second conclusion is the things that cause students’ difficulties in understanding the concept of calculus are students still learned by memorizing and they lack the motivation to repeat the material. Moreover, they rarely practice the questions and they learned only a little of basic concepts of mathematics in high school.
Students’ creative thinking in solving geometry problems
Authors: Jagom Y O , Uskono I V , Leton S I
Published: October 2020

Students’ creative thinking needs to be developed to help them construct new ideas in solving mathematical problems. One of the obstacles that hinder the advancement of creative thinking processes is the incompatibility of the learning approach and cognitive styles. This study aims to describe the students’ creative thinking processes in solving geometry problems based on field-dependent (FD) and field-independent (FI) models of cognitive style. Two students of Mathematics Education Study Program of Widya Mandira Catholic University Kupang participated in this study. Each participant represents different cognitive styles of the field-dependent and field-independent models. The results showed that the participant with the FI cognitive style was able to perform creative thinking processes better than the FD cognitive style participant. This can be observed at all stages. In the preparation stage, the FI cognitive style participant was more capable of expressing important ideas from the given problems; at the incubation stage, she was able to arrange ideas to solve mathematical problems by writing its detailed procedure; at the stage of illumination, she was able to express her ideas verbally; and at the verification stage, re-checking the results of her work.
Structural Equation Modelling of Teaching Quality on Students’ Satisfaction
Authors: Lukman H S , Setiani A , Muhassanah N
Published: October 2020

Students are the main, vital, and central customers that must be served in a college. The college success is characterized by the quality of services provided, and service quality can be identified through student satisfaction. Therefore, knowledge is needed related to variables that affect student satisfaction, especially in the learning process. This study suspects that the knowledge and teaching methods used by educators in the learning process, the depth of material delivered, the implementation of the learning process, the clarity of the assessment of learning outcomes, and the affective interactions of lecturers and students affect the level of student satisfaction. This study uses the Structural Equation Modeling-Partial Least Square (SEM-PLS) with the Bootstrap parameter estimation method. The results showed that all the indicators forming the six latent variables used in this study were significant, so the models met the fit category. The results showed there was a positive and significant effect of the quality of teaching on the level of student satisfaction in the learning process by 19%. However, based on the five variables forming the quality of teaching, only the variable knowledge and teaching methods of lecturers have a significant effect on the level of student satisfaction.
IKIP Siliwangi student’s perceptions of online teaching and learning process during COVID-19 pandemic?
Authors: Nuraeni L , Purwasih R , Mutakim J
Published: October 2020

Covid-19 pandemic in Indonesia has an impact on various fields of life, especially higher education. The online lecture system in higher education is an effective solution and has been applied in the lecture process. This study aims to determine student perceptions about online lectures, to find out the forms of an application used in online lectures and to find out the supporting factors and inhibiting factors in online lectures. This research was conducted with a descriptive survey research method, the sample in this study were students majoring in mathematics education, PGPAUD, and Counseling Guidance, PGSD, Community education and Indonesian with a total number of students 183. The data analysis technique used in this study is to calculate the percentage of data from each indicator, then interpret the score presentation of the data and analyze each indicator. The research instrument uses a question questionnaire sent via the google form application. The results obtained are students’ perceptions of online lectures that students prefer face-to-face lectures compared to online lectures, supporting factors for online lectures are students have free opportunities to learn and find sources of information, availability of data packages, cellphones, laptops and internet networks that support. An inhibiting factor in the online lecture process is the lack of data packages and the internet. This research is expected to be an evaluation of various parties in conducting online learning in tertiary institutions and as study material for other researchers in analyzing and developing students’ perceptions in online learning during emergencies in tertiary institutions.
The Committees of the 5th Seminar Nasional Matematika dan Pendidikan Matematika (SENATIK) 2020
Authors: Rahmawati N D , Muhtarom M , Prahmana R C I , Happy N , Wulandari D , Pramasdyahsari A S , Nursyahidah F , Albab I U , Murtianto Y H , Aini A N , Sutrisno S
Published: October 2020

List of Organizing committee, Steering committee, Editorial Board and Scientific Commitee are available in this pdf.
Designing PISA-like mathematics problem relating change and relationship using physical distancing context
Authors: Nusantara D S , Zulkardi Z , Putri R I I
Published: October 2020

This research was driven by students’ difficulties in solving PISA-like mathematics problems on change and relationship content. The students were not familiar with solving contextual-based problems like PISA, and teachers tended to provide routine problems at low levels. For these reasons, this research aimed to produce a PISA-like mathematics problem that was declared valid, practical, and had potential effects on students’ mathematical proficiency. Design research used as the main framework of research with the type of development studies that had two phases: the preliminary and formative evaluation. Data were collected by conducting a walkthrough, test, interview, and document review. The developed PISAComat was valid from its compatibility with the PISA framework, which related to daily life problems in determining the length of the queue at the shopping center by using physical distancing context on change and relationship content. Practicality was seen from the developed PISAComat can be easily understood by students and well solved even with different strategies. Also, the developed PISAComat had potential effects based on students’ answers at the field test phase, such as understanding the problem, in reality, transforming the real-situation into a mathematical problem, solving a mathematical problem, and interpreting mathematical solution.
Creative thinking profile of students in the completion of the area of 2D-shapes reviewed from the type of personality of Myer-Briggs dimension
Authors: Murtianto Y H , Rahmawati N D , Apriana D
Published: October 2020

Creativity is a 21st Century skill that is needed by everyone. Creativity is born from the ability to think creatively. But, no one has connected creativity with personality. Personality The Myer Briggs’ dimension consists of 4 types of guardians personality students like coherent and systematic learning. Artisans’ students like active learning. Rationals students love the knowledge that uses logic. This study aims to determine students’ creative thinking abilities in solving mathematical problems in terms of the personality type dimensions of Myer-Briggs. The method used in this research is to use qualitative methods. Data collection was carried out in three stages, using questionnaires, written tests, and interviews. The survey was distributed throughout grade VII, and then one student was taken from each personality. The results showed the Guardian subject solves mathematical problems by arranging one or two ways, and the resulting method is fluent and flexible. Artisan’s subject solves mathematical problems by arranging one or two ways, and the resulting method is fluent and flexible, but still, there are misconceptions. Rational and Idealist subject solves mathematical problems by arranging one or two ways, the resulting method is fluent and flexible, but some answers are not new.
Student’s computational thinking skill in solving a problem of convergences or divergences of series in freedom of learning program
Authors: Dian M
Published: October 2020

This research aimed to find the connection between the trends in the Freedom of Learning Program and computational thinking (CT) practices to see if the Freedom of Learning Program could be used for developing students’ CT Skill. The other goals of this research are to analyze how these trends and CT practices apply in a mathematics learning activity. The methods used in this research are the combination of the library and field research. This research also using a qualitative approach, and the results produced are descriptive data. Library research used to find the CT practices that could be applied in the nine trends in Freedom of Learning. Field research is used to analyze a student’s mathematics learning activity to find CT practices and the trends that appear in the learning activity. The results of this research are (1) the CT practices could be applied in every trend with the students as the object of it, (2) in the learning activity every CT Practices (abstraction, decomposition, debugging, and patterns) appear, (3) Some trends of Freedom of Learning Program appear in the learning activity like the learning activity could be done anytime and anywhere, personalized learning, free choice, and project-based learning.
Ethnomathematics for congruence concept: a didactical design in a mathematics classroom
Authors: Kusumaningsih W , Supandi S , Ariyanto L
Published: October 2020

The purpose of this study is to design mathematics learning with a realistic mathematics-based ethnomathematics approach with the concepts of congruence in junior high school students by didactic design research’s stage. Didactic design is based on identifying student learning obstacles in the learning process barriers to student learning primarily through group discussion forums with secondary school teachers in Semarang. The research method is qualitative in the form of didactic design research using techniques triangulation (combining participatory observation, interviews with teachers, questionnaires, and document studies). The identification results of students’ learning difficulties are used to design learning and teaching materials. Teaching material is based on ethnomathematics and uses a realistic mathematical approach. The results of the validation show that teaching materials are appropriate to use. The material aspects and DDR receive input from the validator, primarily related to the use of realistic and ethnomathematics learning approaches. For the overall ranking scale, the validator generally gives a good rating. The revised results were tested on a small scale and large scale, with the average trial results showing excellent results. So, the instructional materials designed could be used to overcome the obstacles of student learning in the material congruence of flat fields.
The COVID-19 impact on statistical learning at State Islamic University in East Indonesia
Authors: Nisa K , Mujizatullah M , Idham I , Nawawi M I , Darwis D , Amiruddin A , Israpil I , Arsyad A R
Published: October 2020

This research aims to describe the portrait of statistical learning before COVID-19 at State Islamic University in east Indonesia, the transformation of the blended learning to full e-learning in statistical courses as the impact of the COVID-19, as well as the challenges and opportunities of statistical courses with full e-learning in COVID-19 situations. The type of this research is descriptive qualitative. Data obtained by telephone interviews with five lecturers from State Islamic University in east Indonesia. The data analysis technique consists of data reduction, data display, and verification. The results of this research show that lecturers have applied e-learning in statistics courses at State Islamic University before the COVID-19. Although face to face learning methods is more dominant used in statistical courses than e-learning methods. The dominant learning media used by lecturers in statistics courses during COVID-19 are WhatsApp and Google Classroom. The biggest challenges faced at statistical courses by e-learning systems are the availability of a stable internet network, and some students do not have personal computers and even mobile phones. As good news, this situation can challenge lecturers and students to be more literate and accustomed to technology. Some lecturers even make YouTube account to support statistical learning.
Integration of educational robotic in STEM learning to promote students’ collaborative skill
Authors: Latip A , Andriani Y , Purnamasari S , Abdurrahman D
Published: October 2020

The study aims to determine the effect of integration of educational robotics in STEM learning to promote students’ collaborative skills. Collaborative skills can be developed by implementing learning strategies that lead to learning activities as hands-on activities, technology engagement, and teamwork between students. These learning activities can be covered by integrated educational robotics in STEM learning. The descriptive method with a quantitative approach was applied in this research with 36 ten-grade students as subject research. The teacher team observed students’ collaborative skills before and after the implementation of STEM-Robotic learning. The observation using the instrument that developed based on indicators of collaborative skills activities. Collaborative skills activities consist of participation, perspective-taking, and social regulation. The results showed that STEM-Robotic learning can promote students’ collaborative skills in participation aspects by 55.93%, perspective-taking aspects by 56.03%, and social regulation aspects by 67.34%. The results indicate that STEM-Robotic learning is an alternative learning strategy that can be implemented to develop 21st-century skills, especially collaborative skills.
Developing android-based arabic-Clock Angle game for eighth-grade mathematics at MTs YMI Wonopringgo Pekalongan
Authors: Fajhriah E N , Mustakim Z , Ali J , Kamal R
Published: October 2020

The use of media in MTs YMI Wonoringgo Pekalongan is still not optimal, especially in a mathematic lesson. It causes student difficulty in understanding the concepts conveyed by the teacher and low motivation so that students are less able to solve problems in studying. Thus, it is hoped that through Arabic angle o’clock game media, students can more easily understand angle math concepts and mastering Arabic vocabulary of o’clock material. The purpose of this study is to produce an android-based Arabic angle o’clock game media in learning mathematics to eighth grade at MTs YMI Wonopringgo Pekalongan. The research method uses the waterfall model (Analysis, Design, Implementation, Testing, and Maintenance). The research subjects were students of eighth grade at MTs YMI Wonopringgo Pekalongan. The sampling technique uses cluster sampling. The result of this study are Arabic angle o’clock game media with the result of the media expert validation with a percentage of 89%, the results of the material expert validation of were 90%, and student responses 88,14% with very suitable/very feasible criteria. Thus, this product is appropriate to use as mathematics learning media in angle o’clock material and increase student to mastering Arabic vocabulary about o’clock in MTs YMI Wonopringgo Pekalongan.
Teacher performance toward students’ mathematical literacy in teaching linear program mathematical models
Authors: Shaumiwaty S , Lubis M A , Lubis T , Dardanila  , Purba A , Nasution T , Ramlan  , Hasrul S
Published: October 2020

The teaching technique is essential to reach students’ literacy goals in learning. This study discussed the teachers’ role in teaching math toward the students’ mathematical literacy in teaching linear program mathematical models. The focus of research is to determine patterns of teachers’ performance in teaching math in the classroom. The ethnography method was applied in this study. Besides, to find out the pattern of the teachers’ performance, the anthropolinguistic approach was used. The pattern of performance is essential data that can describe the phenomena of speaking activities related to mathematical literacy. With the discovery of the teachers’ performance, it can be seen how to apply the teaching model in the next effective teaching and learning process. Research data were video recordings, in-depth interviews, and participatory observation. The results showed that the performance of math teachers in learning mathematics was teaching and examining. They were represented through statement and command language function dominantly instead of question and offer. Statements were encoded with declarative sentences, and command encoded in imperative sentences. Consequently, it affected the low level of student math literacy due to strict learning performance and lack of education part as one of literacy students’ requirements.
Development of methods for automated determination of forest resource parameters using multispectral survey data from unmanned aerial vehicles
Authors: Aleshko R , Bogdanov A , Shoshina K , Ilintsev A
Published: October 2020

One of the most essential renewable resources in the world is the forest. An important issue in the forest industry today is the lack of relevant, reliable and regularly updated information on forest resources. Over the years, this problem has been addressed through labour-intensive field methods. However, in a competitive market and development of high-tech data collection and analysis tools, another issue becomes apparent – the low reliability and detail of the existing remote automated tools of data acquisition on forest resources. The research presented in this article is aimed at addressing this issue. The results of the work built on modern methods and approaches will provide an impetus for the introduction of digital technologies to many business processes of the forest industry.
Common problems of the forest industry and institutional background for its innovative development in Baikal region
Authors: Dayneko D , Dayneko A , Dayneko V
Published: October 2020

The work presents the systematization of the main problems in the Forest industry and institutional background for its development in Baikal region. These problems include the following: production and technological, natural and environmental, institutional and organizational, and problems of the forest protection. The innovative development issues in the Forest industry of has been discussed. The implementation of the Forest innovation system is suggested for sustainable Forest industry management and based on expert opinions to be derived via a special questionnaire distributed.
The study of prehistory and chemical properties of soils on their allelotoxicity formation
Authors: Fedotov G , Gorepekin I , Shalaev V , Batyrev Y
Published: October 2020

The influence of prehistory (land-use history) and soil chemical properties on their allelotoxicity was studied on 12 soil samples of East-European plain with the use of 6 seed cultivars of spring wheat as well as seeds of barley, rye, and triticale. It is shown that despite differs ratio between the values of inhibition for different cultivars, their inhibition order on various soils preserves generally. Land use-history has a significant influence on soil allelotoxicity values: soil samples from territories of agricultural use have higher allelotoxicity in comparison with fallow areas. The experimental data show that crop rotations are not always able to reduce soil fatigue. This makes it necessary to assess the real soil fatigue (soil allelotoxicity) under the crop rotation. The material under consideration, methodological approaches and conclusions can be used in forestry.
The influence of weather conditions on the effectiveness of preventive fire retardant treatment of forests
Authors: Gedjo V M
Published: October 2020

We discuss the influence of weather conditions (increased humidity, rain, snow) on the effectiveness of preventive fireproof treatment of forests and soil with amidophosphate KM. The dependence of the required level of fireproof treatment of forests and soil on the amount of precipitation during one calendar year has been established. We also estimated the minimum required amount of amidophosphate KM for repeated preventive treatment of forests and ground cover. Here we present the results of tests carried out in the field.
Prospects for reforestation in the Far East by reclamation using innovative technologies
Authors: Krupskaya L T , Dergacheva I M , Golubev D A , Kolobanov K A
Published: October 2020

The article presents the results of long-term studies within the limits of closed mining enterprises impact in Priamurye and Primorye of the Far Eastern Federal District (FEFD), where the lands from the forest land fund have been withdrawn earlier for mineral development. As a result, tailing dumps containing highly sulfidized waste have a negative impact on ecosystems. The urgency of the topic is undoubted. In this regard, the aim of the study was to create technology for the forests reproduction on technologically contaminated and disturbed land using innovative achievements (bioremediation) to ensure their environmental and social security. Natural and mining systems formed by the activities of the closed mining enterprises of the Priamurye and Primorye regions were the object of the problem under study, they located in the basin of the Amur River of large biosphere value (Solnechny GOK (Mining and Processing Works), Khrustalnensky GOK. The necessity of effective solution of the mentioned problem was substantiated. It has been established that the level of technogenic pollution of environment objects exceeds in dozens and even hundreds of times the regional background indicators and MPC. A reclamation method was created using the potential of biological systems. The novelty of the proposed methods is confirmed by Pavtent.
Phosphonic acid as a component of low flammability particle boards
Authors: Leonovich A A , Gedjo V M , Svirido E A
Published: October 2020

The possibility of using dibasic hydroxyethylidene diphosphonic acid to reduce the flammability of particle boards has been considered. A formulation was compiled with the addition of amino alcohols, surfactants and other auxiliary compounds, conventionally called the fire retardant Palonot. Wood substrate (veneer) was impregnated with various amounts of Palonot, and the development of combustion during ignition and subsequent attenuation with a regular increase in heat loss to the environment was studied. The results were compared with amidophosphate, which has found industrial use in fire protection of wood-based materials. The manufactured three-layer boards withstood the test in the “fire tube” and met the main requirements of the current standards for general-purpose boards. The thermomechanical curves and the details of the process of adhesion of the binder to the substrate containing the flame retardant are provided. The conditions for the manufacture of wood-based materials with the patented Palonot have been analyzed.
Testing of machines selecting mathematical model for a forest plantation operating
Authors: Markov O , Voronov R , Sysoev M
Published: October 2020

Forest plantations have been successfully established and operated in many countries since the middle of the last century. At the same time, in the Russian Federation (RF), where forest plantations are not widespread, timber processing enterprises are beginning to feel a raw material hunger due to the gradual exhaustion of available operational Mature forests. As a result, the average distance of harvested wood removal from natural forests is constantly growing, and the cost of logging roads increases every year. One of the problems that hindering the creation of forest plantations is the lack of a scientifically based system of machines in the Russian Federation that can perform the entire cycle of work: starting with planting (sowing) woody plants and ending with the collection of wood crops and preparing the territory for a new succession. This article describes a refined mathematical model of the modular principle of machines selection that intended for the full cycle of forest plantation operation. During testing, the optimal value was found that meets all the specified requirements. During testing was found out that finding the optimal solution by the chosen method requires a large amount of time.
Research of the trunk lower part form of the tree-like willow in the north-taiga area and development of transition tables from the stump diameter to the diameter at breast height
Authors: Paramonov A A , Tretyakov S V , Koptev S V , Yaroslavtsev S V , Tsvetkov I V
Published: October 2020

The paper considers the results of studying the shape of the lower part of tree-like willow trunks in the north-taiga area of the Arkhangelsk region. As a result of the studies, the diameters of willow trees at the 1.3 m height were calculated depending on the stump-level diameter at various heights from 0 to 1.3 m. This work aims at the development of two versions of tables for receiving trunk diameter at the 1.3 m height basing on stump diameter. Standards development for the transition from the stump diameter (at heights from 0 to 100 cm) to the diameter at the 1.3 m height is essential since the height and diameter at 1.3 m are the input parameters to the tables for determining trunk volumes. A need to determine the volume of felled trees` trunks arises while performing various kinds of examinations, and need to determine the stock of stands arises when addressing issues related to the evaluation of illegal logging. Various input and output data options allow more flexible use of patterns established during research and more rational use of tables in practice. Processing of field materials was carried out by methods generally accepted in forest evaluation practice.
Application of remote sensing analysis of the surface temperature for management and evaluation the state of environment in Pushkin town, Saint-Petersburg city, Russia
Authors: Quyet P T , Lyubimoff A V , Cuong N H , Vu L K
Published: October 2020

GIS and Remote sensing are now being used in many fields, especially in the field of agriculture and the environment. The results of the paper have built the land surface heat map of Pushkin district with detailed heat scales, which is the optimal way to solve more specifically the changes in heat and its effects. move on ecosystems that other common tools can’t solve.
Research of strength of gluing of wood
Authors: Rusakov D , Sokolova E , Varankina G , Chubinsky A
Published: October 2020

Wood is widely used in industrial and civil engineering. It has many valuable physical, mechanical and other operational properties that make it widely possible to use it not only in construction, but also in other sectors of the economy. Many scientists studied the problems of studying the processes of mechanical processing of wood and the development of rational technological conditions and modes of gluing wood, allowing to obtain products with the required physical and mechanical properties. One of the ways to increase the efficiency of production of glued building materials from wood is gluing lumber along the length of the toothed spike. The strength of glued beams during operation depends on many factors, including the quality of the formation of adhesive joints. The main ones are the properties of wood, mainly density and humidity, and the type of glue. The surface relief, the type of surfaces to be glued, the dimensions and the shape of the ten on also have an effect. The results of a study of the bonding strength of wood in glued beams and the strength of finger jointing are presented in this article.
Concept of a hybrid contextual model for designing environmental objects
Authors: Ishmukhametova K V , Kudasheva D R , Baymuratova S H , Tuktarova A N
Published: October 2020

This article is devoted to the hybrid model as a new paradigm for contextual design of an environmental object that has dualistic features within its genius loci. Features of the concept of contextual hybrid are revealed in the article on the basis of experimental design material devoted to problematic environmental objects of cities with unclear differentiation of contextual aspects. The strategy of building a hybrid contextual design model is described in the article on the example of the territory of “Cherkalikhina Gora” in Ufa. The authors introduce the concept of “urban memory” as an ideological platform for the project model of the territory. Dualistic features of contextual aspects of the environment through the rod of urban memory are impaled on the physical platform of a contextual hybrid model such as “nature”, thereby assembling a single hybrid contextual model of environmental object design.
Communication organization issues through the design of visual space in a digital environment
Authors: Khabibova A S , Khizhnyak E A
Published: October 2020

The article reveals the main types of visualization to support complex activities, specifies the forms of using methods of information visualization by means of computer technologies. The main principles of teaching communicative design are described, with account for modern visualization technologies and technologies for exhibiting design-engineering products in the digital space. The article reveals various aspects of the design teaching methodology, focused on the comprehensive use of visualization tools in the learning process. Practical recommendations are given that allow you to build a training program taking into account a wide range of new digital media technologies.
Choice of style solution for a design project
Authors: Khristoforova I V , Krasikova T I , Silcheva L V , Sorokotyagina E N
Published: October 2020

The publication reveals the role of marketing research in the choice of style solutions for design concepts in educational institutions. The results of the analysis of styles used in the design concepts of educational institutions, conducted with the involvement of 159 analog objects, are presented. The problem of conflict between the creative and technological components in the design profession is discussed. The role of the digital component in the effectiveness of work on a design project is emphasized. The list of popular professional computer programs used in the course of design engineering. Based on these programs, the student project presented as an example was executed. Discussed issues of digitization of design in conjunction with the assessment of the author’s contribution and the impact of the creativity of a particular designer
Using computer graphics in design
Authors: Shopina E V , Stativko A A , Markova M A
Published: October 2020

In the modern world, with the development of technology, it becomes possible to create design art objects from the developed sketch to the implementation of the project in material using computer graphics. Thanks to vector graphics programs and the emergence of laser and milling equipment with numerical software (CNC), designers were able to transfer the drawing to the material using material cutting technology. The object of the study is vector graphics programs, laser and milling cutting technology. As a result of the study, the authors conclude that thanks to software products and the development of technologies and equipment, designers were able to simplify the process of making decorative products.
Features of style shaping in modern design
Authors: Vasilenko E V , Vasilenko P G , Gordeeva T A , Gerasimenko I I
Published: October 2020

The article is devoted to the analysis of modern design, features of style formation and conceptual solutions in design. The dynamics of social development of our society, energy interactions, flows and mixing of social, cultural, aesthetic layers and groups contribute to an even greater variety of styles in the modern household environment. Eclecticism - free variation of images of any of the historical styles, their arbitrary combination, adaptation to needs-becomes the main feature of modern design. The organization opposes the desire for unlimited freedom of expression, from collectivism to individualism. Despite all the complexity and multilayered style-forming factors, in the end, the style is a system of externally perceived and easily recognizable features. Recent trends in design and world art are not at all without roots in the past and do not represent a decisive break with them. The use of retro style, pop art, hyperrealism and abstraction in design is generated by a modern over-urbanized culture. Modern style is a complex system of interactions in a single process of spiritual development of society. It can be understood as a conclusion, as a generalization of real experience. The existence of a single modern style with its unity of forms, features and attributes is impossible. Modern style formation involves the combination of different directions.
How Long-Term Acute Care Hospitals Can Play an Important Role in Controlling Carbapenem-Resistant Enterobacteriaceae in a Region: A Simulation Modeling Study
Authors: Lee Bruce Y , Bartsch Sarah M , Lin Michael Y , Asti Lindsey , Welling Joel , Mueller Leslie E , Leonard Jim , Brown Shawn T , Doshi Kruti , Kemble Sarah K , Mitgang Elizabeth A , Weinstein Robert A , Trick William E , Hayden Mary K
Published: October 2020

Typically, long-term acute care hospitals (LTACHs) have less experience in and incentives to implementing aggressive infection control for drug-resistant organisms such as carbapenem-resistant Enterobacteriaceae (CRE) than acute care hospitals. Decision makers need to understand how implementing control measures in LTACHs can impact CRE spread regionwide. Using our Chicago metropolitan region agent-based model to simulate CRE spread and control, we estimated that a prevention bundle in only LTACHs decreased prevalence by a relative 4.6%–17.1%, averted 1,090–2,795 new carriers, 273–722 infections and 37–87 deaths over 3 years and saved $30.5–$69.1 million, compared with no CRE control measures. When LTACHs and intensive care units intervened, prevalence decreased by a relative 21.2%. Adding LTACHs averted an additional 1,995 carriers, 513 infections, and 62 deaths, and saved $47.6 million beyond implementation in intensive care units alone. Thus, LTACHs may be more important than other acute care settings for controlling CRE, and regional efforts to control drug-resistant organisms should start with LTACHs as a centerpiece.
Computational strategies to combat COVID-19: useful tools to accelerate SARS-CoV-2 and coronavirus research
Authors: Hufsky Franziska , Lamkiewicz Kevin , Almeida Alexandre , Aouacheria Abdel , Arighi Cecilia , Bateman Alex , Baumbach Jan , Beerenwinkel Niko , Brandt Christian , Cacciabue Marco , Chuguransky Sara , Drechsel Oliver , Finn Robert D , Fritz Adrian , Fuchs Stephan , Hattab Georges , Hauschild Anne-Christin , Heider Dominik , Hoffmann Marie , Hölzer Martin , Hoops Stefan , Kaderali Lars , Kalvari Ioanna , von Kleist Max , Kmiecinski Renó , Kühnert Denise , Lasso Gorka , Libin Pieter , List Markus , Löchel Hannah F , Martin Maria J , Martin Roman , Matschinske Julian , McHardy Alice C , Mendes Pedro , Mistry Jaina , Navratil Vincent , Nawrocki Eric P , O’Toole Áine Niamh , Ontiveros-Palacios Nancy , Petrov Anton I , Rangel-Pineros Guillermo , Redaschi Nicole , Reimering Susanne , Reinert Knut , Reyes Alejandro , Richardson Lorna , Robertson David L , Sadegh Sepideh , Singer Joshua B , Theys Kristof , Upton Chris , Welzel Marius , Williams Lowri , Marz Manja
Published: October 2020

SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) is a novel virus of the family Coronaviridae. The virus causes the infectious disease COVID-19. The biology of coronaviruses has been studied for many years. However, bioinformatics tools designed explicitly for SARS-CoV-2 have only recently been developed as a rapid reaction to the need for fast detection, understanding and treatment of COVID-19. To control the ongoing COVID-19 pandemic, it is of utmost importance to get insight into the evolution and pathogenesis of the virus. In this review, we cover bioinformatics workflows and tools for the routine detection of SARS-CoV-2 infection, the reliable analysis of sequencing data, the tracking of the COVID-19 pandemic and evaluation of containment measures, the study of coronavirus evolution, the discovery of potential drug targets and development of therapeutic strategies. For each tool, we briefly describe its use case and how it advances research specifically for SARS-CoV-2. All tools are free to use and available online, either through web applications or public code repositories. Contact:evbc@unj-jena.de
Coupled co-clustering-based unsupervised transfer learning for the integrative analysis of single-cell genomic data
Authors: Zeng Pengcheng , Wangwu Jiaxuan , Lin Zhixiang
Published: October 2020

Unsupervised methods, such as clustering methods, are essential to the analysis of single-cell genomic data. The most current clustering methods are designed for one data type only, such as single-cell RNA sequencing (scRNA-seq), single-cell ATAC sequencing (scATAC-seq) or sc-methylation data alone, and a few are developed for the integrative analysis of multiple data types. The integrative analysis of multimodal single-cell genomic data sets leverages the power in multiple data sets and can deepen the biological insight. In this paper, we propose a coupled co-clustering-based unsupervised transfer learning algorithm (coupleCoC) for the integrative analysis of multimodal single-cell data. Our proposed coupleCoC builds upon the information theoretic co-clustering framework. In co-clustering, both the cells and the genomic features are simultaneously clustered. Clustering similar genomic features reduces the noise in single-cell data and facilitates transfer of knowledge across single-cell datasets. We applied coupleCoC for the integrative analysis of scATAC-seq and scRNA-seq data, sc-methylation and scRNA-seq data and scRNA-seq data from mouse and human. We demonstrate that coupleCoC improves the overall clustering performance and matches the cell subpopulations across multimodal single-cell genomic datasets. Our method coupleCoC is also computationally efficient and can scale up to large datasets.

Availability: The software and datasets are available at https://github.com/cuhklinlab/coupleCoC.
The role of the south-western Alps as a unidirectional corridor for Mediterranean brown trout (Salmo truttacomplex) lineages
Authors: Splendiani Andrea , Berrebi Patrick , Tougard Christelle , Righi Tommaso , Reynaud Nathalie , Fioravanti Tatiana , Lo Conte Paolo , Delmastro Giovanni B , Baltieri Marco , Ciuffardi Luca , Candiotto Alessandro , Sabatini Andrea , Caputo Barucchi Vincenzo
Published: October 2020

The role of the south-western Alps as a corridor for Mediterranean trout (Salmo trutta complex Linnaeus, 1758) was evaluated in order to understand the influence of the last glacial events in shaping the spatial distribution of the genetic diversity of this salmonid. For this, the allochthonous hypothesis of a man-mediated French origin (19th century) of the Mediterranean trout inhabiting the Po tributaries in the Italian side of the south-western Alps was tested. A total of 412 individuals were analysed at the mitochondrial control region. The phylogenetic classification was carried out by using a Median-Joining Network analysis. Mismatch pair-wise analysis, molecular dating and Kernel density distribution analysis of the main mitochondrial lineages were evaluated to compare past demographic dynamics with the current spatial distribution of genetic diversity. The main outcomes resulted strongly in agreement with a biogeographic scenario where the south-western Alps acted as a unidirectional corridor that permitted the colonization of the upper Durance (Rhône River basin) by trout from the Po River basin. Therefore, the Mediterranean trout should be considered as native also along the Italian side of the south-western Alps and the allochthonous hypothesis should be rejected.