bluuebunny/crossref_metadata_2025 huggingface dataset:
Profile of Students’ Strategy in Senior High School with Cognitive Reflective and Impulsive Style in Solving the Combinatorial Questions
Authors: Aini N , Juniati D , Siswono T Y E
Published: December 2019

The goal of this research is to describe the strategies used by the Senior High students with the reflective and impulsive cognitive style in solving combinatorial questions. The strategy is seen from three aspects, namely: formulating, representing, and solving aspect. The subject of the research is the eleventh grade students based on the test of MFFT (The Matching Familiar Figures Test), to determine the reflective and impulsive cognitive style and also the communicative of research subject. The data is collected by giving the combinatorial questions and identifying the subject’s strategy in solving the questions through interview. The validation used is time triangulation. The data analysis used is data reduction, data representation, and conclusion. The result shows that the students with reflective type are different from the students with impulsive type. When it is in the formulation stage, student with reflective cognitive style (RCS) reads the question slowly with strong intonation and gives the information by using his own words. In the representation, RCS draws four parallel boxes as many as the representation of the digits. In solving the question, RCS chooses the strategy based on the question rule, by memorizing and using strategy, RCS ways checks each step. While, in the formulation, ICS reads the question first, then makes parts of the questions by not using his own words. In the representation, student with impulsive cognitive style (ICS) uses the mathematics symbol. In solving the questions, ICS chooses a strategy fast without seeing the question rules overall and uses the strategy spontaneously without rechecking so that there are many mistakes found.
The Investigation of Blind Students’ Misconception in Constructing Quadrilateral Analytic Definition Using Geometry’s Puzzle
Authors: Andriyani  , Juniati D
Published: December 2019

Many students still possessed misconceptions and not yet know the relation between each quadrilateral, no exception blind students that have abnormal physiological structures. Lack of student’ ability in relational thinking makes it difficult to construct analytic definitions that contain the closest type (genus proximum) and special differentiator (differentia specifica) on the objects. The aim of this study is to investigate the misconceptions of blind students in constructing the analytic definition of a quadrilateral using geometry’s puzzles. Misconception investigations focus on misconceptions of students’ concept or differences of student’ scientific understanding with the expert conceptions, especially misconception in constructing analytic definitions. This research is an exploratory study with a qualitative approach and the subjects of this study are one seventh grade student who experienced totally blind and one student who low vision from MTs Yaketunis Yogyakarta. Data collection through task-based interviews and observations. Before being analyzed, the obtained data then transcribed, classified, reduced and validated using the time triangulation method. Based on the results of data analysis, it is known that both of blind students have misconceptions namely classificational, relational and theoretical misconceptions with the level of misconception in low vision student lower than totally blind.
Investigating Covariational Reasoning: What Do Students Show when Solving Mathematical Problems?
Authors: Fuad Y , Ekawati R , Sofro A , Fitriana L D
Published: December 2019

Covariational reasoning plays a significant role for solving problems. This study examines the covariational reasoning of master program students when solving mathematical problems such as fraction, velocity and acceleration, proportion, and integral. 26 students of mathematics education master program, Universitas Negeri Surabaya, are involved in this study. Generally, mental action of students is more prominent on fraction and proportion than on the other issues. On fraction and proportion problems, most students are able to fulfill all mental actions such as coordinating the value, the direction, and the amount of change of one variable, and also coordinating the average and the instantaneous rate of change of the function. However, on velocity, acceleration, and integral problems most students cannot show their mental actions well. They only fulfill 3 of 5 mental actions of covariational reasoning. Generally, the shape of their graph related to those problems are irrespective with initial point. These findings suggest that learning in mathematics should place increased emphasis on problem involving graph to promote covariational reasoning of the students.
The Instructional Design of Blended Learning on Differential Calculus Using Successive Approximation Model
Authors: Wintarti A , Abadi  , Fardah D K
Published: December 2019

The combination of traditional learning where teacher and students are in the same classroom and e-learning using technology is known as blended learning. This paper outlines the process of designing blended learning on Differential Calculus. The Successive Approximation Model (SAM) is used as the instructional design upon the course. In the preparation phase, the information gathering is starting to ensure an agreement between the learner’s need and learning solution. Afterward, the design and prototype of a blended course was implemented for Mathematics Education students on Mathematics Department Universitas Negeri Surabaya. Along with iterative development phase, the evaluation is conducted in order to make the course move to Alpha (a complete version of the instructional design blended learning) then evolve into Beta (a better version after Alpha revised) and then the Gold as finale version is reached.
Effectiveness of Inquiry-Creative-Process Learning Model to Promote Critical Thinking Ability of Prospective Physics Teachers
Authors: Wahyudi  , Verawati N N S P , Ayub S , Prayogi S
Published: December 2019

Critical thinking has become one of the main competencies of learning at the level of higher education in Indonesia, and teaching interventions that lead to the achieving of these competencies are important to do. One of the learning models developed to promote critical thinking ability is the Inquiry Creative Process (ICP), a learning model. This research aims to describe the effectiveness of the ICP learning model to promote the critical thinking ability of prospective physics teachers. The implementation of the ICP learning model involved prospective physics teachers at four higher education institutions in the province of West Nusa Tenggara - Indonesia, that are the Mataram University (UNRAM), Teacher Training and Education Institut of Mataram (IKIP Mataram), Mataram State Islamic University (UIN Mataram), and the University of Muhammadiyah Mataram (UM Mataram). This study is experimental research, where is for each group performed pretest, implementation of the ICP learning model, and then posttest. The critical thinking ability of prospective physics teachers was measured using a critical thinking ability test instrument. The data of critical thinking ability were analyzed descriptively and statistically, where the homogeneity, normality, t-test, and ANOVA test were conducted. The results showed that the implementation of the Inquiry Creative Process learning model was effective to promote the critical thinking ability of prospective physics teachers. Descriptions of further research results are described in this article.
Development of A-SSI Learning Media (Android Social Scientific Issues) to Improve Science Literation in Earth Coating Subject for First Grade of Junior High School
Authors: Jalil R M , Prastowo T , Widodo W
Published: December 2019

This study aims to provide an alternative learning process that was supported by the use of A-SSI media (Android Social Scientific Issues) by including actual issues so that they could train and improve students’ scientific literacy skills. The developing A-SSI media must be tested for feasibility based on three aspects, they were validity, effectiveness, and practicality. This study used a pretest-posttest design and tested on grade VII junior high school students. A-SSI media that would be used in learning process is validated by experts through a validation sheet. The results obtained based on the validators’ assessment are 88.5% with the criteria “very good”. In addition, effectiveness of A-SSI media is tested through literacy tests and student responses. The results obtained in the literacy test, literacy skills of students were increased with an average n-gain of 0.66 with “moderate” category, there was a response given by students in the learning process with A-SSI media, 88.9% students gave a positive response of the using of A-SSI media. Then in the last aspect, that was practicality of media was reviewed through student activities and implementation of learning. The results obtained in the implementation of learning, 89.8% of activities designed in RPP were carried out well, while the activities of students based on the results of observation were very good and showed activities that supported scientific literacy skills.
Activities of students in using worksheet based on Contextual Teaching and Learning
Authors: Fauziah A M , Nurita T
Published: December 2019

This study aims to describe the activities of students in using student worksheets based on Contextual Teaching and Learning (CTL). The method used is descriptive quantitative. Student worksheets based on Contextual Teaching and Learning that are used in learning consist of three sub-layers are atmosphere, lithosphere, and hydrosphere. In CTL-based student worksheets, there are 7 main components of CTL are constructivist, questioning, modelling, finding, community learning, reflection, and authentic assessment. Learning outcomes using CTL-based Student Worksheets are easier for students to understand learning material, this is shown by students in solving problems on student worksheets properly. Based on the results of the study it can be concluded that learning by using Student Worksheets based on Contextual Teaching and Learning helps students more easily understand the subject matter.
Practicality and effectiveness of Jigsaw-Modified Learning Models integrated on ARCS (Attention, Relevance, Confidence, and Satisfaction) motivation in Invertebrate material to complete student learning outcomes
Authors: Windy Sheren R. , Ibrahim Muslimin , Kuntjoro Sunu
Published: December 2019

This study aims to produce a Jigsaw-modification learning model integrated with ARCS motivation that is valid, practical, and effective with learning tools that support learning. This research is a type of development research with a 4-D (Four-D Models) development model and experimental design of The One Group Pretest and Posttest Design. The preparatory activities were carried out at Postgraduate, UNESA while the trials on 30 students class X MIA-1 students have held at High School 1 Madiun in January 2019 until March 2019. The practicality of the model and the learning tools were reviewed from the classical implementation with an average of 3.95 with very good categories and student activities at 3.6 in the good category. The effectiveness of the model and learning device is based on the results of increasing student motivation gain score learning outcomes of 0.6 with moderate criteria, completeness of 100% learning outcomes with high gain scores. Based on the results of data analysis and discussion of research, it can be concluded that Jigsaw-modification learning models integrated the ARCS motivation that was developed properly, in terms of effectiveness and practicality. Learning models and devices developed can complete student learning outcomes seen from aspects of motivation and improvement in learning outcomes.
Science in A Black Box: Can Teachers Address Science from Socio-Scientific Issues?
Authors: Erman E , Sari D A P
Published: December 2019

This study aims to determine teachers’ ability to address science from socio-scientific issues (SSI) as predictors of scientific literacy that consider as a black box in schools. A total of 25 junior high school science teachers in some areas of East Java volunteered to be involved in this survey. Data collected by addressing macroscopic issues (AMI) tests and questionnaires were analyzed descriptively through content analysis and percentage. The results indicate that science teachers generally have difficulty in addressing science from SSI. The authentication worksheet shows that almost all AMI that can be addressed only reaches 50% maximum. Less than 50% of science teachers have heard of scientific literacy but have not been able to describe it. The implication, the student may not become a scientifically literate person if teachers are not scientifically literate, and SSI is not involved in the learning process.
Research on the guidance learning and monitoring system of autonomous learning for College English
Authors: Wen Lu
Published: December 2019

This paper aims to find out the influence of guidance learning and monitoring on autonomous learning for College English. By applying the qualitative and quantitative research approach, we tested the efficiency of the guidance learning and monitoring system of autonomous learning by a semester-long teaching practice. We compared the final score with that of the previous semester. After analyzing the data, we concluded that compared with the previous semester, the grades of performance scores of the experimental semester were significantly improved as well as the final scores. This shows that the effect of implementation of guidance learning and monitoring system to autonomous learning in College English is obvious. Finally, this paper provides some strategies to improve the effect of autonomous learning, and points out that there is a harmony relationship between autonomy and monitoring.
Study on the surface ceramization of aluminum alloy
Authors: Wu Zhifu , Hu Liyun
Published: December 2019

Aluminum alloy has been widely used as a metal material. However, it is usually vulnerable to corrosion, so the protection of aluminum alloy surface is particularly important. At present, the commonly used methods of surface protection of aluminium alloys are anodic oxidation, plasma micro-arc oxidation, chemical oxidation and so on. In this experiment, chemical protective coatings were prepared by chemical oxidation of Aluminium 1100 and 6063 treated with H2O2 or KMnO4 solution. The results showed that the oxidation capacity of H2O2 solution from 3% concentration to 15% concentration to Al1100 was successively enhanced. Moreover, the ceramic coating produced when the concentration of H2O2 is 12%-15% has a better effect, and the structures are cauliflower, concave and convex, and hydrophobic. It is expected that the surface has lotus leaf effect.
Analysis and evaluation of nutritional components in muscle of sinogastromyzon szechuanensis
Authors: Yue Lijia , Chen Xiaojiang , Li Wei
Published: December 2019

Based on routine biochemical analysis methods, the nutritional composition in muscle ofSinogastromyzon szechuanensiswere calculated using the Excel 2019 and SPSS 25.0 software. The results showed that the rates of moisture, crude protein, crude fat and ash in muscles ofS. szechuanensisare (77.80±0.70) %, (18.38±0.21) %, (2.00±0.10) % and (1.55±0.08) % respectively. 16 kinds of amino acid were detected. The total content of amino acids (TAA), essential amino acids (TEAA) and delicious amino acids (TDAA) were 17.80%, 6.83% and 7.37% respectively. Amino acid score (AAS), chemical score (CS) and essential amino acid index (EAAI) were calculated using Excel 2019 software. The results revealed that the first and second limited acids were Ile and Val respectively. The essential amino acid index (EAAI) was 89.65. Four kinds of delicious amino acids (TDAA) accounted for (7.37±0.32) %, with the 41.43% of the total amino acids. The ratio of branched chain amino acid to aromatic amino acid (F value) were 2.31±0.04. It revealed thatS. szechuanensiswas a kind of delicious and high-quality fish with high-protein and low-fat composition.
Research of Chinese Government debt sustainability and its effect on economic growth
Authors: Li Jifan
Published: December 2019

This paper researches the appropriate scale of Chinese government debt from the perspective of debt sustainability and its effect on economic growth. First, we made a model based on fiscal response framework and introduced trade openness, savings ratio and so on as control variables. We use it to measure the upper limit of the sustainable debt ratio over the years. Then we did empirical research and found that government debt has a threshold effect on economic growth, with a turning point of about 33.3%. Besides, we also found that debt affects economy by affecting the formation of total society capital significantly, and excessive debt may inhibit the formation. According to our research, the government should release savings reasonably, improve its sensitivity to debt and use it more efficiently to enhance the turning point of debt impact. Government should also gradually reduce current debt ratio to optimize the relative scale of debt.
Data comparison of the effects of feeding ginkgo leaf fermentation and Chinese herbal medicine on meat ducks
Authors: Wang Jie , Ren Shanmao , Fang Xixiu
Published: December 2019

In order to study the effect of feeding Ginkgo leaf fermentation and Chinese herbal medicine on meat duck, we added Ginkgo leaf fermentation and Chinese herbal medicine additive to the daily feed of meat ducks, and set up a control group (basic feed), a western medicine group (basic feed+150mg/kg aureomycin), an experimental group 1 (basic feed + Chinese herbal medicine 0.1%) and an experimental group 2 (basic feed + 0.1% Chinese herbal medicine + 2.5% Ginkgo leaf ferment). We fed the ducks for 45 days, and then completed the measurement of production performance and blood index. Based on the measurement method of related data, we used Excel and spss25 software for data statistics and analysis. The results showed that the diet supplemented with 0.1% Chinese herbal medicine and 2.5% Ginkgo leaf fermentation could significantly increase daily growth weight of meat ducks during the whole growth period (P<0.05), at the same time, it could reduce feed conversion ratio, and the content of total protein and albumin in serum could be significantly increased (P<0.05). The value of alkaline phosphatase in the experimental group was lower than that of the control group. The amount of immunoglobulin and complement in the serum were all higher in the experimental group than in the control group. The overall effect of Ginkgo leaf fermentation and Chinese herbal medicine in basic diet was significantly better than that of western medicine group (P<0.01).
Tourism spatial structure of urban agglomeration in the middle reaches of the Yangtze River based on social network analysis
Authors: Liu Chun , Nie Guihua
Published: December 2019

Based on a revised gravity model, this paper establishes an evaluating indicator and model of the spatial structure of tourism economic linkages in urban agglomeration by using social network theory and method. Tourism spatial economic data of 56 urban in the urban agglomeration of the middle reaches of the Yangtze River were collected. With the help of Ucinet software, we discuss the tourism spatial structure features in the urban agglomeration of the middle reaches of the Yangtze River, and the tourism spatial structure of urban agglomerationis optimized by network density, centrality degree, structural holes, core-periphery structure and condensing subgroup model.
A method of fiducial-value normalizing to leveling the global average atomic number of lunar surface calculated by orbital Gamma spectroscopy data
Authors: Zhao Jiankun , Xiong Chao , Yan Wenxun , Ge Liangquan
Published: December 2019

As “banded structure” is a vexed question in orbital Gamma spectroscopy data inversion. In this paper, a new method to level the lunar global data of average atomic number by the fiducial-value in the stable composition circle is proposed. In order to verify the accuracy, the existing moon-sampling rock data as the “standard sample” and fast neutron data are also presented. The slope of the positive fit curve is 1.875 and the correlation coefficient is 0.72. And some geological characteristics, such as the structural boundaries and internal features of the Antarctic Aiken Basin, can identify obviously.
Research of intelligent traffic flow prediction algorithm
Authors: Tu Min , Liu Baoshan , Zhong Fangqiang
Published: December 2019

With the rapid development of transportation industry, how to carry out intelligent traffic flow prediction has become an urgent issue. In this paper, compared with the single algorithm traffic flow prediction model, we propose a new method for modelling that combines the minimum multiplication support vector machine and clustering algorithm to predict the traffic flow, which provides the basis for scientific traffic management and decision-making process.
Performance of Bundle Protocol (BP) for deep space communications with long link disruptions
Authors: Wang Ding , Yu Hongzhi
Published: December 2019

Near Earth missions and deep space missions will continue to be a major future space mission. A long link disruption is inevitable in space communications because of spacecraft rotation, planetary bodies and limited relay capability. A few works have been done with delay/disruption tolerant networking (DTN) technology for deep space communications and provided feasibility for its adoption in LEO- space and deep space missions. However, not much work has been done to fully evaluate the performance of DTN in such an environment, especially in the presence of custody and long link transfer. In this article, we present an experimental performance evaluation of DTN architecture and protocol stack with DTN custody transfer and long link break underneath bundle protocol (BP), in typical LEO-satellite and deep space communication infrastructures accompanied. The experiment was conducted by performing realistic file transfers over a PC-based test-bed.
The design of sports energy expenditure measuring device based on three-dimensional motion sensor
Authors: Jiao Chun , Tang Ming
Published: December 2019

The effectiveness of the measurement method based on accelerometer for human sports energy expenditure has been confirmed by research in recent years. In this paper, combined with the overall design requirements of micropower consumption and miniaturization, this paper describes the design scheme of a portable measuring device that uses three-dimensional accelerometer to measure sports energy expenditure. The general design idea of the measuring device and the implementation method of main functional units are discussed in detail.
Building up or spreading out? Typologies of urban growth across 478 cities of 1 million+
Authors: Mahtta Richa , Mahendra Anjali , Seto Karen C
Published: December 2019

Urban form in both two- (2D) and three-dimensions (3D) has significant impacts on local and global environments. Here we developed the largest global dataset characterizing 2D and 3D urban growth for 478 cities with populations of one million or larger. Using remote sensing data from the SeaWinds scatterometer for 2001 and 2009, and the Global Human Settlement Layer for 2000 and 2014, we applied a cluster analysis and found five urban growth typologies: stabilized, outward, mature upward, budding outward, upward and outward. Budding outward is the dominant typology worldwide, per the largest total area. Cities characterized by upward and outward growth are few in number and concentrated primarily in China and South Korea, where there has been a large increase in high-rises during the study period. With the exception of East Asia, cities within a geographic region exhibit remarkably similar patterns of urban growth. Our results show that every city exhibits multiple urban growth typologies concurrently. Thus, while it is possible to describe a city by its dominant urban growth typology, a more accurate and comprehensive characterization would include some combination of the five typologies. The implications of the results for urban sustainability are multi-fold. First, the results suggest that there is considerable opportunity to shape future patterns of urbanization, given that most of the new urban growth is nascent and low magnitude outward expansion. Second, the clear geographic patterns and wide variations in the physical form of urban growth, within country and city, suggest that markets, national and subnational policies, including the absence of, can shape how cities grow. Third, the presence of different typologies within each city suggests the need for differentiated strategies for different parts of a single city. Finally, the new urban forms revealed in this analysis provide a first glimpse into the carbon lock-in of recently constructed energy-demanding infrastructure of urban settlements.
Increasing occurrence of heat waves in the terrestrial Arctic
Authors: Dobricic Srdjan , Russo Simone , Pozzoli Luca , Wilson Julian , Vignati Elisabetta
Published: December 2019

Heat waves in the Arctic may strongly impact environment and local communities. Recently several indices have been proposed for monitoring environmental changes in the Arctic, but heat waves have not been addressed. By applying a structured approach for evaluating occurrences of periods with exceptionally high temperatures, this study demonstrates that in the last decades there was an increase of heat wave occurrences over the terrestrial Arctic. The increase is mainly over the Canadian Arctic Archipelago and Greenland that are surrounded by ocean undergoing a sea-ice melting trend, while the Eurasian Arctic shows no significant change in heat wave occurrence. Since 2002 the probability of experiencing heat waves in the Arctic has been similar or even higher than in the middle and low latitudes and heat waves have already started to increasingly threaten local vegetation, ecology, human health and economy.
Impact of Atlantic water inflow on winter cyclone activity in the Barents Sea: insights from coupled regional climate model simulations
Authors: Akperov Mirseid , Semenov Vladimir A , Mokhov Igor I , Dorn Wolfgang , Rinke Annette
Published: December 2019

The impact of the Atlantic water inflow (AW inflow) into the Barents Sea on the regional cyclone activity in winter is analyzed in 10 ensemble simulations with the coupled Arctic atmosphere-ocean-sea ice model HIRHAM-NAOSIM for the 1979–2016 period. The model shows a statistically robust connection between AW inflow and climate variability in the Barents Sea. The analysis reveals that anomalously high AW inflow leads to changes in static stability and wind shear in the lower troposphere, and thus favorable conditions for cyclogenesis in the Barents/Kara Seas. The frequency of occurrence of cyclones, but particularly of intense cyclones, is increased over the Barents Sea. Furthermore, the cyclones in the Barents Sea become larger (increased radius) and stronger (increased intensity) in response to an increased AW inflow into the Barents Sea, compared to years of anomalously low AW inflow.
Analysis of Plantation Sector Potential on Regional Development in Poleang District, Bombana Regency
Authors: Amin M
Published: December 2019

Gross Regional Domestic Product (GRDP) is a measurement of productivity that reflects the entire value of goods and services produced by a region including the plantation sector products obtained. This study aims to analyze priority plantation commodities to be developed in the Poleng Kabupetan Bombana area. The analytical method used is Location Quotient (LQ) analysis and Shift Share Analysis. The results showed that plantation commodities which were the commodities of the base plantation were clove with an LQ value of 4.3794, coffee with an LQ value of 3.3723, pepper with an LQ value of 2.6978, patchouli with an LQ value of 1.4400, and coconut with an LQ value of 1.1150. The priority order for the development of base plantation commodities in Poleang District, Bombana Regency is the first priority for coconut commodities with LQ> 1, positive PP and positive PPW. The second priority is the commodity of pepper, coffee and cloves with LQ> 1, negative PP, and positive PPW. Meanwhile, the alternative priority is patchouli commodity with a value of LQ> 1, negative PP, and negative PPW.
Effect of different seedling sources on growth and carrageenan yield of seaweed kappaphycus alvarezii cultivated in Marobo Waters, Muna Regency, Southeast (Se) Sulawesi, Indonesia
Authors: Aeni Odi Nur , Aslan La Ode Muhammad , Iba Wa , Patadjai Andi Besse , Rahim Manat , Balubi Muis
Published: December 2019

The purpose of this study was to determine the effect of different seedling sources on growth and carrageenan yield of K. alvarezii. There were three various seedlings sources used in this study: local strain, tissue-cultured seedlings, and seedlings resulting from mass selection combined with tissue–cultured method called “prof’. This research was over three months (August-October 2018) in Marobo coastal waters, Bone District, Muna Regency SE Sulawesi using the longline method. The results showed that the daily growth rate (DGR) during this study tended to fluctuate among treatments “prof’ and tissue-cultured seedlings had higher the DGRs than local strain seedlings. Ratio fresh weight (FW) and dry weight (DW) showed no significant differences among different seedling sources. The mean FW: DW ratio showed the local strain had the highest ratio (10.10:1) followed by tissue-cultured seedlings (9.88:1) and prof (9.06:1). Furthermore, the local strain showed a significant difference in carrageenan yield from the “prof’ and tissue-culture seedlings. Local strain seedlings showed the highest carrageenan yield (40.58±2.51%) followed by tissue-cultured seedling (35.35±2.79%) and prof seedlings (33.88±2.09%). Ice-ice disease and epiphyte (Sargassum polychystum) were found during this study. This study showed that prof and tissue-cultured seedlings greater potential for improved seaweed farming.
Fatty acid map of various species seagrasses on the Donggala Beach
Authors: Tahril  , Taba P , Nafie N L , Noor Alfian , Ratna  , Muzakkar M Z
Published: December 2019

Quantitative identification of seagrass fatty acids has been carried out from the species of Thalassodendron ciliatum, Cymodocea rotundata, Cymodocea serrulata, Thalassia hemprichii, and Enhalus acoroides. Fat analysis samples taken in Donggala regency aquatic is done by the Soxhlet method and analysis of fatty acids using by the GC method. It was found that variations in fat content were between 0.27% - 1.01%, while the saturated fatty acid concentrations found varied between 4.39% - 8.03%, unsaturated fatty acids varied between 4.48% - 18.39%, and omega 3 (EPA) varies between 0.27% - 1.24%. If seagrass fatty acid data is combined with the results of protein, phosphate, and minerals analysis data, it can be the basis for estimating the fertility status of seagrass and the healthy environment of a region, especially the coastal aquatic of Donggala regency.
Thermal investigation on the attics of buginese traditional houses in South Sulawesi
Authors: Latif S , Hamzah B , Rahim M. R , Mulyadi R , Idrus I
Published: December 2019

This study aims to investigate the thermal conditions of the attic of traditional Buginese houses in the climate of South Sulawesi. The analysis is carried out based on data surveyed from eight houses. The recorded data includes both attic internal weather data and the measured environmental weather starting at 08.00 to 16.00 Central Indonesia Time (CIT). Measurement results showed high temperature in the attics, ranging from 30.7 °C in the morning to 51.1 °C in the middle of the day. Relative humidity minimum of 17.3% at midday and the highest is 67.1% in the morning. The roofs temperature can reach 67.7 °C before midday. The temperature on the attic floor between 24.9 °C in the morning to 43.0 °C in the middle of the day. The difference in the surface temperature of the attic floor guesses to be an average of 1 °C higher than the ceiling surface. Environmental weather factors have the most dominant influence on attic thermal performance.
The relationship between learning process interactions and student’s learning outcomes in environmental sustainability matter geography-social science education subject
Authors: Sejati A E , Kasmiati S , Ikhsan F A
Published: December 2019

Interaction is one of the vital points for success in the learning outcome. This paper aims to determine the relationship between interactions in the learning process and students learning outcomes in the environmental sustainability matter. This paper is a correlation. The research sample used proportional random sampling in a total of 46 students. The paper results show a significant test by the F-test is F-count 53.350 with F-table 4.03 (F-count> F-table) or a significant level of F of 0.000 <at α = 0.05, interaction variables learning has a significant effect on student learning outcomes. Simple Linear Regression can be explained that the regression coefficient for the learning interaction variable is 0.548 times, can be interpreted as a positive relationship between the interaction of learning and student learning outcomes will increase 0.548 times. There is a relationship between interactions in the learning process with social studies learning outcomes of students at Junior High School State 1 of Meluhu reaching 54,8%.
Development of technology for withdrawal of the powered roof support from a row and its relocation from the liquidated longwall system
Authors: Mazurek K , Szyguła M , Turczyński K
Published: December 2019

Directions in improvement of efficiency and safety of the used systems for relocation of powered roof supports from the liquidated longwall was indicated basing on a review of the current systems. Suggestion for the machines and devices used for mechanization of a powered roof support relocation from a row and its transportation in cross-cut entry is presented. The innovations consist in combination of two functions in one machine used for roof support reinstallation and its rotation as well as its safe and fast relocation to the main transportation roadway.
The building’s structural elements stress-strain state assessment taking into account soil consolidation (uniaxial task)
Authors: Sukhina K , Vilgelm U , Vlasov V , Sukhin K
Published: December 2019

This article discusses a comparative analysis of the building design results when calculating the final draft and taking into account the soil consolidation over time. The bases uneven effect deformations assessment was made on the elements’ stress state of the frame buildings erected under difficult ground conditions, which causes a rational stiffness diaphragms arrangement and the expansion joints in order to evenly distribute the efforts when choosing a space-planning solution.
The supported landslide slopes’ operation simulation
Authors: Panasiuk L , Turina V , Stupina D
Published: December 2019

The article describes the landslide processes formation processes modeling in free and reinforced slopes. Unlike many well-known approaches, the proposed approach does not introduce simplifying hypotheses. As, for example, hypotheses about the slip lines form or about the slope conventionally “solid” areas form. The slope stability problem is considered in the general formulation of a three-dimensional or two-dimensional (plane strain) plasticity theory. The limiting equilibrium approach and the continuation methods by the loading parameter are used. The resolving equations are constructed in the form of a finite element method (FEM) in displacements. It is shown how, in addition to physical, to take into account geometrical and constructive nonlinearity.The small fragment limiting state hypotheses can be assigned arbitrary. In the general formulation, a complex loading process is assumed — an external load can grow arbitrarily. In this case, the growth load linear nature is used within one external loading branch. Inside the branch, a “cycle in a cycle” process is organized in small increments of load. The process continues either until the limit state of the considered computational domain is reached, or until the load and the transition growth next branch end to the next one.
Proposals for the development of the harmonized standards justifying the requirements of the technical regulations concerning the buildings and structures safety
Authors: Absimetov V E
Published: December 2019

The system of the technical regulation in construction assumes the existence and functioning of the three components: the rationing system, the supervision and control system, and the conformity assessment system (Figure 1) [1].

The effective interaction of these three components makes it possible to ensure the entire “life cycle” of the construction objects existence from the engineering surveys and design to the reconstruction and disposal [2,3,4].
Engineering analysis of foundations in the chasm zone, taking into account the soil subgrade nonlinear behavior
Authors: Shebunyaev A , Yudina I
Published: December 2019

The article solves the problem of stress and strain state of the subgrade waned by cylindrical neckline, modeling the chasm zone. The solution was obtained taking into account the soil subgrade nonlinear behavior based on using the A.I.Bonkin bilinear subjection. The visual results of calculations in the form of stresses and strains isofields are presented in the article. The obtained solution made it possible to offer an updated analytical model of the buildings and constructions karst-resisting foundations for consideration. A variable coefficient of subgrade reaction, varying according to the bilinear law was adopted in the proposed analytical model.
Research on the relationship between the building displacements, thickness and soil type under seismic conditions
Authors: Kolosov E , Kolosova N
Published: December 2019

The problem of protecting buildings and structures from seismic effects has been troubling the scientists’ minds from different countries for many years. Various engineering structures, damping devices, organizational solutions are proposed, with the help of which scientists and builders try to reduce the destructive seismic effect on buildings and structures. This paper presents an analysis of how the displacement of a structure changed with a change in the thickness of a layer of a particular soil, how the efforts in piles changed. The results can be recommended when making design decisions for high-rise construction.
Seismic and shock effects reduction by vibration protection systems equipped with amplifiers of inertial characteristics
Authors: Brysin A N , Solovyev V C , Mikayeva S A , Nikiforov A N
Published: December 2019

The article considers the issue of reducing the impact pulse on an object by creating an energy absorber on the pulse distribution path, using the increasing additional inertia principle in relative motion.
About the impact value on the track in the «train – bridge» system
Authors: Ivanchenko I I
Published: December 2019

The article shows the necessity of taking into account the full vertical acceleration of the pair of drivers during high-speed operation. Dynamic coupling of a rolling load depending, among other things, on the material of an elastic-viscous interlayer between the rail and the bridge deck slab with a bridge is important during the high-speed operation of rolling stock along bridges. Material characteristics can be selected using a mathematical model of interaction, implemented in numerical experiments. The article shows the necessity of taking into account the full vertical acceleration of the pair of drivers during high-speed operation.
Complex research of the operational integrity of the solid reinforced concrete floor on the results of the field observations and information modeling data
Authors: Subbotin V A , Subbotin I A , Podskrebalin A S
Published: December 2019

The article presents the results of a complex of exploratory work and field observations, which made it possible to obtain comprehensive data on the operational integrity of building structures of solid reinforced concrete floors of a commercial building reinforced with composite materials, and to compare them with information modeling data and design solutions.
Scientific and technical support features of the high-rise buildings design
Authors: Dmitriev D S , Belostosky A M , Nagibovich A I
Published: December 2019

Article reflects the main aspects of the scientific and technical support of the design stage of high-rise buildings. As well as the peculiarities of creating design models for substantiating the mechanical safety of three-dimensional systems “foundation - high-rise building structures”.
The principle of determining the values of building system’s organizational and technological reliability
Authors: Lapidus A , Zakieva N , Grankina D , Avakov A
Published: December 2019

Over the past few decades, a new scientific direction has been formed, connected with the concept of organizational and technological reliability (OTR) of construction. Domestic scientific school of research, evaluation, design and management of OTP construction activities uses a variety of methods and models (analytical, graphical, statistical, imitation, etc.) in solving the problem of increasing the reliability of building production systems. This article's goal is to to get acquainted with the basic concepts and problems of the scientific direction of the organization and management of construction, as well as the principles of determining organizational and technological reliability.
Determination of the interface parameters on the contact of concrete and soil by different methods
Authors: Ter-Martirosyan A Z , Sidorov V , Almakaeva A
Published: December 2019

The article presents a comparison of tests carried out on torsional and direct shear devices, in order to determine the strength reduction factor on its contact arising between the soil massif and the underground structure. It is necessary to understand which device makes it possible to determine the strength characteristics that are closest to real cases. For the experiments, soft clay and concrete samples were used. The tests were carried out at a vertical pressure of 100 kPa with speeds of 0,005 mm/min and 0,01196 °/min. According to the obtained results, it was concluded that the values of the shear stresses on the torsional shear device are higher than on the direct shear device. This is due to the fact that the contact area is not constant during the test, respectively, the shear resistance decreases. In a number of other works, the differences in the results are attributed to the fact that the mechanisms of collapse differs depending on the type of device. Therefore, it is necessary to study more detailed the conditions of shear and the process of specimen collapse in all devices, which allow one to determine the strength parameters in order to understand which of them gives more correct results.
Construction sector enterprise product quality as a result of strategic innovation management
Authors: Romanenko E , Ryabichenko S
Published: December 2019

The article examined the role of construction products quality in ensuring the operational reliability of buildings and structures constructed with their use. The issues of complexity and feasibility of introducing innovations into construction were raised, construction manufacturing was evaluated as a multistage, sequential process. An example was given to demonstrate the results of introducing innovative methods into the production process of an enterprise for the production of reinforced concrete products.
Econometric modeling of the influence of economic factors on the volume of construction: Russian impact
Authors: Osipov V S
Published: December 2019

The considerable turbulence of the Russian economy has a restraining effect on the development of systemically important types of economic activity, with no exception being construction, in which, starting in 2015, there has been a decline. In this regard, we believe that the assessment of the causes of the emerging trend is an urgent task to be solved in the framework of economic science. The purpose of the paper is to quantify the impact of the main economic factors on the dynamics of the volume of work performed in the construction industry in Russia. Such research methods were used: analysis, synthesis, comparisons, graphical, tabular, correlation and regression analysis. Sources of information were datas from the Federal State Statistics service of the Russian Federation. Results of the research: analysis of the main characteristics of construction in the Russian Federation showed their growth in 2017 compared to 2002, while the leading positions are occupied by entities that are part of the Central Federal District, Volga Federal District and South Federal District; assessment of the impact of economic factors on the output of construction works showed a strong impact of the number of people employed in the industry and investment in buildings and structures; econometric modeling of the level of work performed in construction and a forecast for 2018-2020 shows that while maintaining the current conditions, the industry will grow in minor topics. The patterns of development of the industry that we identified may be useful to researchers in the field of construction economics and the housing market, as well as to government officials for shaping the development strategy for construction in the Russian Federation.
The development of modular architecture as an alternative to expensive housing
Authors: Dudchenko M Yu , Kostina E K , Myronenko O V
Published: December 2019

The article analyzes all the positive aspects of the modular architecture. The result is the establishment of trends in modern design.
Traditions and innovations in lighting of libraries
Authors: Karaseva L V
Published: December 2019

The libraries lighting systems development was shown with the changes of their functions when the new architectural directions appeared and the light role in the space formation was rethought. The main factors influencing the comfortable luminous environment creation - maximum natural light use, protection from insolation, color and texture of finishing materials - were considered on the examples of the well-known libraries. Special attention is paid to the Don state public library interior lighting theme in Rostov-on-Don.
The Problem of Preservation, Restoration and Reconstruction of the World Architectural Heritage
Authors: Gnezdilov D V , Kapnina E V , Martynyuk E S
Published: December 2019

The article is devoted to the relevance of preserving monuments of the world architectural heritage. The question of the importance of architecture for the future generations is raised. The new possibilities of restoration and reconstruction of the architectural monuments, their historical development and prospects are considered. It is shown that the importance of the world architecture monuments preservation problem cannot be underestimated.
Media objects in architecture and art-design: materials and methods of creation
Authors: Brykova N A , Sbytova A N , Gorgorova Y V
Published: December 2019

In this article the authors discuss the ways in which the use of media objects in architecture and art-design allows to easily adjust the space scenario depending on fast changing needs. The researchers consider the materials exploited for creating the media objects as well as present the classification of the media technologies in comparison to their interaction with people.