bluuebunny/crossref_metadata_2025_split huggingface dataset:
Gender and Career Choice Behaviour: Social Cognitive predictors of persistence in Construction Education
Authors: Akinlolu Mariam , Haupt Theo C. 
Published: February 2021

Abstract
This study applied the Social Cognitive Career Theory to determine the factors that influence student’s persistence in construction programs in the South African Context. The study further explores the possible differential validity of SCCT variables for men and women. A survey of 108 conveniently sampled South African undergraduate students, including 48 women and 60 men, enrolled in construction-related programs was conducted. The samples were drawn from student cohorts enrolled in construction management, civil engineering, property development, land surveying, building and quantity surveying. To test for gender differences in the degree of relationship between persistence and the socio-cognitive variables(predictors), the Fisher z test was performed by testing for differences in correlation coefficients between groups. Stronger relationships between persistence and social supports was found for women compared to men. Self-efficacy, outcome expectations, learning experiences and social supports were the most salient predictors for both men and women in construction programs.
Assessment of the mitigating measures for cost overruns in the South African construction industry
Authors: Morena M , Amoah C 
Published: February 2021

Abstract
This study investigated the causes of cost overruns and cost management methods to minimize cost overruns in the South African construction industry. The methodology used is a quantitative approach. Closed-ended and open-ended survey questions were used to gather data from 130 construction professionals, of which, 74 completed questionnaires were returned. The data received were analyzed by making use of both a computer programme called Statistical Package for Social Sciences (SPSS) and a content analysis method. The findings from the study revealed that the most common and significant causes of cost overruns were changes in the scope of work, decision making, planning, the inadequate experience of contractors, an increment of material prices, provision of weather conditions, unskilled labour, late design and lack of coordination. The findings also indicate the effects of cost overruns as disputes claims, extension of time, reduced profit to the contractor, and bad public relations. The study has identified cost management methods that can reduce cost overruns in the South African construction industry as effective planning, accurate estimate, tracking status of the project, use of scheduling tools, an inspection of works, communication, site meetings, proper methods of construction and evaluation of work completed. This study, therefore, suggests that all construction professionals must be equipped with factors of cost overruns in order to implement the correct measures to minimise cost overruns.
Eliciting project managers’ perceptions regarding economic sustainability incorporation on construction projects: a Bloemfontein case study
Authors: Sinxadi L , Awuzie BO 
Published: February 2021

Abstract
The operationalization of sustainable construction [SC] practice poses a challenge in South Africa. Seemingly, there is an overt concentration on some SD dimensions during decision-making by project managers. Yet, successful operationalization requires the incorporation of all SD dimensions in an integrated manner with trade-offs made to accommodate project peculiarities. To date, a paucity of literature eliciting perspectives of project management professionals within Bloemfontein on the consideration of economic sustainability in SC practice has been observed. This study seeks to explore the perspectives and understanding of project managers on economic sustainability and to identify the factors influencing the prioritization of economic sustainability aspects to secure satisfactory trade-offs. A qualitative case study research design using semi-structured interviews was used to elicit data from a purposively selected sample of project managers working within Bloemfontein. Qualitative content analysis (QCA) was utilized for data analysis. Findings confirmed that although project managers have an appreciable level of understanding concerning economic sustainability in SC, they lacked an understanding of how to motivate for its prioritization when compared to environmental and social dimensions. It is expected that these studies’ findings will contribute to the growing literature on the incorporation of sustainability dimensions within the construction projects.
Evaluating the health and safety practices for the delivery of building energy retrofit projects in South Africa
Authors: Okorafor C , Haupt T C 
Published: February 2021

Abstract
Implementing energy upgrades in buildings will bring about economic gains, while enhancing social wellbeing and engendering sustainable development. However, building energy upgrades encompass additional considerations and requirements in terms of processes, materials, and expertise, technology and health and safety practices. All these factors constitute complexities in the delivery of the project. In addressing this problem; the paper presents how stakeholders understand health and safety issues in the delivery of projects amongst South African service providers. The case-based study highlighted the health and safety issues, and solutions concerning the methodologies that are appropriate in enhancing the conditions.
Measuring the performance of construction contracts with regard to the environment
Authors: Trtílek P , Hanák T 
Published: February 2021

Abstract
Performance measurement of business processes is a necessary prerequisite for efficiency improvement. The increasing demand for enhanced environmental protection in construction is also reflected in recent performance measurement systems. This paper aims to review various systems used for performance measurement in construction contracts and to discuss current developments in this area. Findings show that the importance of environmental protection is growing as the sustainability approach is becoming more common. In the construction industry, green and sustainable criteria are becoming an integral part of responsible entities’ considerations and strategies for reducing energy consumption and handling construction materials responsibly (e.g., by means of recycling/re-use), considering the high material intensity of construction production.
Risk Analysis and Flood Hazard Assessment in the Hornád River Basin
Authors: Zeleňáková M , Šugareková M , Purcz P , Gałaś S , Portela M M , Hlavatá H 
Published: February 2021

Abstract
The paper focuses on assessing the effects of floods on selected components of the environment in the Hornád river basin: the impact of floods on population, water conditions, soil, fauna, flora and their habitats, structure and use of land and landscape, protected areas and their protection zones, the territorial system of ecological stability, urban complexes and land use, cultural and historical heritage, cultural values of an intangible nature, and archaeological and paleontological sites and important geological localities. The assessment was performed using the risk analysis method. The risk index was calculated by summing the products of probabilities and consequences for each impact of flooding on the components of the environment, and the total value of the risk index is 5.5 (average risk). The hazard index was determined by quantification of industrial sources of pollution in the river basin: each source of pollution was assigned a point score; the total hazard is represented by the sum of the points for these sources of pollution, and is equal to 19. The total risk index is then represented by the product of the risk and hazard indices, i.e. 104.5. This value indicates a low level of flood damage risk in the Hornád river basin.
Analysis and Discussion on Operation Stability of Urban Sewage Treatment Plant
Authors: Wang Wei 
Published: February 2021

Abstract
Based on the acceleration of the development of the national economy and the overall progress of urbanization, the discharge of domestic sewage has increased significantly, and the characteristics of domestic sewage within each city are significantly different. Therefore, the design and operational stability of urban sewage treatment plants are proposed higher requirements. In this case, the urban domestic sewage treatment plant should follow the basic principles of adapting measures to local conditions, taking into account the characteristics of domestic sewage drainage and water quality in different areas to ensure the rationality of the sewage treatment process design and the safer and more stable subsequent operations. Based on this, the article takes the urban domestic sewage treatment plant as the main research object, and focuses on the related content of its operational stability.
Negative charged functional groups play important role in Al transport from environment to plant root outer layer cells
Authors: Li Zhigen 
Published: February 2021

Abstract
Aluminium in acid soils is highly toxic to plants and expresses negative impact on environment and agricultural production. Understanding its distribution and transport from environment to plant cells especially root cell walls is significant in reducing its phytotoxicity. In the present study, two varieties of wheats (Triticum aestivum L.) ES8 and ET8 with different Al tolerance were examined using fourier transform infrared spectroscopy (FTIR). The spectra results showed that the negative charged functional groups polysaccharide and carboxyl were observed at the wheat roots outer cellular layers. These charged functional groups provided binding sites for free Al3+ ions from the environment. And the supply of negative charges by these groups is probably one of the important reasons of high Al accumulation at plant root cell walls.
PVA/graphene Aerogels With High Mechanical Strength
Authors: Zhao Yan , Xing Guangjian , Li Zhenyu , Zhao Ya’nan , Yu Chenrui , Liu Qingjun , Zhao Chang 
Published: February 2021

Abstract
In this study, graphene aerogels with high mechanical strength were successfully prepared by effectively doping graphene aerogels with different proportions of poly(vinyl alcohol) (PVA). The structure of the as-prepared aerogels was studied by means of field emission scanning electron microscopy (FESEM), Fourier-transform infrared (FTIR), Raman and X-ray photoelectron spectroscopy (XPS). The result indicated that the aerogels show a three-dimensional network-like structure and PVA has been successfully incorporated into graphene aerogels. The mechanical properties of the graphene aerogels doped with different proportions of PVA were tested, indicating that the PVA/GAs can support 7000 times of its own weight and its maximum compressive stress can be up to 400 KPa.
Application of Microbiotechnology in Ecological Restoration of Mines
Authors: Zhang Cheng Yin 
Published: February 2021

Abstract
Recently, the research of microbiology and geology has achieved extensive development, and the application of microbiotechnology in mining-related fields has become more common. Based on this, the paper takes microbiotechnology as the main research topic with focus on its specific application in ecological restoration of mines, hoping to help.
Principles and Skills of Product Design to Promote Green Behavior
Authors: Yueh-Te Cheng 
Published: February 2021

Abstract
Promoting green behavior through product design is a simple way to reduce human impact on the environment. Based on Design for Sustainable Behavior and Behavior Theory, this study aims to propose design principles and techniques to effectively promote green behavior, and take household appliances as the empirical object of research, and introduce Analytical Hierarchy Process to overcome the problem in multi-criteria decision making of choosing the best design principles and skills under limited resources. The empirical results show that “Design for Green Behavior of Perceived Behavioral Control” is the key to promote energy-saving behavior of household appliances. Relevant designers can consider the weight value of the research results, and effectively design products to promote green behavior.
Practice of generation-grid-load-storage interactive transaction considering clean energy consumption
Authors: Fan Jie , Li Xuesong , Chen Hao , Jiang Yu , Wang Shizhen , Cao Xiaojun 
Published: February 2021

Abstract
Jiangsu power exchange center Co., Ltd. actively researches and develops the generation-grid-load-storage interactive trading considering clean energy consumption from the perspective of provincial situation, network situation and market ecology. On the one hand, in view of the future development trend of power grid with the source-grid-load-storage interaction, this paper analyzes the main market exchange demand, puts forward the generation-grid-load-storage power market transaction platform architecture, and expounds the functional module deployment. On the other hand, the Internet is used to collect large-scale and scattered clean energy, energy storage facilities and demand side resource trading demand. Based on the traditional main power market, the paper proposes a sinking market that meets the incentive compatibility principle and promotes the active and deep interaction of regional market entities, three new interactive trading varieties of source grid load and storage, and an overbooking algorithm of air tickets. This paper carry out practice in Huai’an (Jinhu) and Suzhou, and organize formal transaction and settlement.
The Structure Design And The Flow Field Analysis Of The Gas-Liquid Separation Cyclone
Authors: Rui Yang , Lei Zhang , Lv Chao j , Baojin Zhu 
Published: February 2021

Abstract
This paper introduces the structural characteristics and working principle of the gas-liquid cyclone separation device, and explores the laws of changing of gas volume fraction distribution, velocity field and pressure drop with or without a thimble in the underflow port and under different thimble shapes. The separation efficiency of gas-liquid separator reaches 80% after adding a thimble. At the same time, indoor experiments fully verified that the pressure loss is greater and the speed increases after changing the shape of the thimble to a truncated cone shape. Truncated cone thimble helps the dense liquid move to the sidewall and the low density gas gathers toward the central axis. And the distribution of internal fluid makes the treatment effect of degassing more superior.
Start-up performance and optimization of the stirring wind-heating system
Authors: Chen Lingchong , Ma Xinxia , Xie Hongzhen , Li Yongguang , Liu Jiahao , Liu Dong 
Published: February 2021

Abstract
The stirring wind-heating system uses natural wind as the power to drive the wind turbine so that the wind turbine directly drives the heater to stir the liquid to generate heat. Therefore, the mechanical energy is directly converted into heat energy. The start-up process is a crucial step for the regular operation of the stirring wind-heating system. To optimize the start-up performance of the stirring wind-heating system, its structure is improved in this work. In the system, the flexible connection is realized by using the torque-limited hydraulic coupling instead of the mechanical shaft connection. The torque characteristic is the characterization of the start-up performance of the system. Therefore, the stirring wind-heating test-bed was designed. Taking the torque in the starting process as the primary research object, the start-up performance of different schemes of the system was tested respectively under different working conditions, such as stirring speed, angular acceleration, and liquid-filled content of the heater. After improving the connection structure of the system, the starting torque is reduced from 2.2, 4, and 7.2 N·m to 0.68, 0.9, and 1.46 m, respectively, which optimizes its starting performance.
Research on Network Loss of Distributed Energy Integration into Power System
Authors: Xu Qingfeng , Gao Peng , Chao Tong 
Published: February 2021

Abstract
At present, the integration of clean energy into the grid has led to excessive network losses. This paper proposes a method for optimizing clean energy power generation parameters. In view of the random characteristics of intermittent renewable energy power generation such as wind power and photovoltaic power generation, the maximum likelihood estimation method is used to optimize the clean energy power generation model parameters. Then, a P-Q equation based on the integration of clean energy into the system was established. Finally, the simulation verified that the optimized power generation model effectively reduces the grid loss.
Research on evaluation system of power market operation under Energy Internet
Authors: Wang Shaoran 
Published: February 2021

Abstract
As the market transaction involves the interests of all aspects of the power industry, it is an important problem for the market operation to ensure the healthy and stable operation of the market. Market operation analysts are faced with a complex set of data - grid parameters, market rules, transaction data, background of market participants and other relevant information. Therefore, a set of scientific and quantitative analysis methods are urgently needed to help them understand the market operation situation, find out the existing problems and predict the market trend, so as to ensure the healthy operation of the market.
Study on Microscopic Distribution Law of Remaining Oil after Polymer Flooding based on Polymer Flooding Control Degree
Authors: Zhao Ya-jie 
Published: February 2021

Abstract
There are many factors that affect the distribution of remaining oil after polymer flooding, and different geological conditions, production methods and production systems will affect the distribution characteristics of remaining oil. In this paper, the control degree parameters of polymer flooding are used to quantitatively measure the remaining proportion of four types of microscopic residual oil after polymer flooding, namely cluster, membrane, blind end and corner, and it is concluded that different types of microscopic residual oil have different reduction ranges after polymer flooding. The microscopic remaining oil distribution law of different displacement intensity positions at high, medium and low levels is summarized. After polymer flooding, the remaining oil distribution is more concentrated, and the oil saturation in the remaining oil-rich area is higher, which is distributed in strips and sheets. The main enrichment areas of remaining oil are near faults and sandstone pinchouts. The residual oil for polymer drive has a limited effect, and the development difference in the subsequent water drive stage still exists.
Latest Trends of Atmospheric Cells under Global Warming
Authors: Liu Ruizhe 
Published: February 2021

Abstract
Four atmospheric cells, Hadley cell, Ferrel cell, polar cell and walker cell, was introduced and latest trends of Hadley cell and Walker cell was given in this paper. From previous studies, a significant intensification of the Hadley cell is shown statistically by the National Centers for Environmental Prediction-National Center for Atmospheric Reasearch(NCEP/NCAR), NCEP1 and the European Center for Medium-Range Weather Forecast(ECMWF) Re-analyses(ERA40). In contrast, no clear change in the period is shown in the NCEP2 reanalysis while great differences of the structure of the Hadley cell from ECMWF and NCEP/NCAR reanalyses are shown. A poleward expansion and strong weakening of the Hadley cell was found given the increased greenhouse gas(GHG) forcing. the inhomogeneous sea surface temperature(SST) change has become the most important factor on interannual timescales. The stronger Hadley cell will happen when the more central Pacific El Niño events happen. The stronger the Walker cell is, the more frequently the eastern Pacific El Niño events occur. In this paper, the changes of the cells under global warming are discussed. Global warming may cause the width of the Hadley cell to increase, exacerbating global warming in turn. Stronger Walker cell lead El Niño happens more frequently, doing harm to agriculture production
Variation characteristics of surface temperature in Dianchi Lake Basin in recent 20 years
Authors: Liu Shuang , Luo Yi , Li Kexin , Shang Chunxue 
Published: February 2021

Abstract
The ecological environment of the earth has changed with the development of economy. These changes also have an impact on human’s life. We can know that the average annual temperature in the Dianchi Lake Basin has shown an upward trend in the past 20 years through the analysis of temperature changes in the Dianchi Lake Basin. In the four seasons, there are various degrees of sudden changes, especially in autumn, the temperature rising trend is the most significant, and there is a downward trend in winter but the downward trend is not obvious. From the analysis of monthly average temperature data, it can be seen that the temperature is rising except for April and August, and the rising trend is also obvious in October, November and December.
Analysis of the Effects of Rainfall and Groundwater on the Activities of the Baibaoshan Fault
Authors: Hong Li 
Published: February 2021

Abstract
The Babaoshan fault is one of the main faults in Beijing area. The cross-fault leveling in Niukouyu segment of the fault has been well monitored for many years. At the same time, rainfall and groundwater have obvious influence on leveling data. Based on the qualitative analysis of fault activity reflected by the change of EW direction leveling of Niukouyu segment from 1992 to 1998, a three-dimensional fault model is established to quantitatively explore the weakening effect of rainfall and groundwater on fault activity.
Integration of Voxel Models with GeoSOT-3D Grids based on Coordinate Matching
Authors: Lu Chang , Guo Xian , Jiang Jie 
Published: February 2021

Abstract
Virtual Geographic Environments (VGEs) are proposed as a new generation of geographic analysis tool to contribute to human understanding of the geographic world and assist in solving geographic problems at a deeper level. Aiming at providing virtual scenarios that correspond to the physical world, it is of vital importance to implement geographic modeling and simulations in a proper way. Voxel model is one of widely used raster model for VGEs but generally described in local coordinate system which makes it difficult to be integrated with real geographic locations. To solve this problem, we proposed a method to integrate voxel model with a global grid model GeoSOT so as to establish the correlation between the voxel models and the real geographic locations. The space geometry relationship between voxel and GeoSOT grid was defined and the formula for transforming voxel models into GeoSOT grid was designed. A 3D visualization prototype system was developed based on the proposed method with a 3D building point cloud dataset as modelling objects. Experimental results showed that our method can implement the positioning, meshing expression and visualization of voxel models and verifies the effectiveness of the method proposed. Our method will provide an alternative solution for virtual geographic modeling.