bluuebunny/crossref_metadata_2025 huggingface dataset:
Electricity consumption profile of mid income-housing
Authors: Soebiyan V , Sakina B
Published: August 2021

The building sector has a significant contribution to global warming and climate change with respect to the energy consumption. In order to reduce greenhouse gas (GHG) emissions, buildings must strive to immediately reduce energy consumption using fossil fuels. Today’s urban housing consume quite high energy. The need for modern urban life and increasingly narrow land conditions, urban heat island conditions, dense urban environments contribute indirectly to changes in urban housing conditions. This study aims to examine the profile electricity energy of homes in urban areas. This study processes data from questionnaires. The result indicatesthe use of electrical energy is quite frequent for cooling the buildingin the night with setting temperature far below the comfort standard, considered a waste of energy.
Optimalization of cross ventilation at family room for fisherman flats in Muara Angke, North Jakarta
Authors: Prijanto IP , Prawata AG , Wizaka W
Published: August 2021

This paper presents the study on one aspect of natural ventilation, which is cross ventilation. The study is aimed to investigate the optimal louvre window type to maximize the wind speed required to enter the room in order to maintain the comfort ventilation inside the room. This aspect is necessary because the vertical housing is aimed for fishermen at MuaraAngke that have low income economy and could not afford to pay for excess energy usage for air conditioning. The result shows that not all type of louvre could maximize the wind speed required. The steps of the study is as follows: (1) to study the optimum wind speed required for comfort ventilation, (2) to study the aspects of cross ventilation, (3) to study the optimal louvre window type that can maximize the wind speed required.
Vertical residential on Transit Oriented Development principles : Jakarta case study
Authors: Ibung A S Y , Soebiyan V , Wizaka W
Published: August 2021

Vertical residential havnot integrated with public transportation modes, so that dwellers use their private vehicles as daily transportation, which is has a negative impact to the level of traffic congestion and air pollution. According to UN Habitat related to Sustainable Transportation and Communication Systems, the transportation sector is major consumer of nonrenewable energy of land and is a major contributor pollution, congestion and accident. The application of the concept of Transit Oriented Development is needed to cotrol the level of congestion and air pollution.
A Study of Interactive Playground for Kindergarten in Cempaka Putih
Authors: Ardiani Y M. , Setiawan D , Nugraha H
Published: August 2021

This paper presents the study of using Interactive Playground, motivated by the condition of children which increases the adverse effects of lack of play, so the purpose of this budget is to get game designs that can facilitate children’s play and learning activities. Problems in design are: How playgrounds are applied in interactive design and also kindergartens in DKI Jakarta still have a lot of limited space and land for playing and child development through games. The purpose of this is so that children can experience learning well, succeed, develop social and physical skills. This research uses observation, comparative study, site analysis, typology, activity patterns, mass formation and simulation. Interactive Playground, from the results of comparative studies from several kindergarten schools from domestic and abroad called class rooms and other facilities require different spaces compared to nursery schools in Indonesia specifically in Jakarta.
Office with Kinetic Sunshading Application on Building Envelopes at Setiabudi
Authors: Azmi M A , Setiawan D
Published: August 2021

The Setiabudi area is a business district located in South Jakarta and is one of the business and office centers in Jakarta. With the development of the economy in Jakarta, the need for office buildings has increased. Electricity usage in the building sector reached 41% and is the biggest sector in consuming energy. The cause of excessive use of electricity is the use of AC. This is influenced by the level of solar radiation to the building. With the increasing solar radiation, building’s OTTV became out of standard. According to Governor Regulation No. 38/2012 OTTV for buildings may not exceed 45 W / m2. This Electricity usage can be minimized by reducing solar radiation to the building, thus reducing the power usage of AC usage. This paper presents the study of integrating kinetic sunshading as building envelopes. The study is aimed to investigate the impact of sunshading to reduce solar radiation and reaching the standard of OTTV. The steps of study is as follows: (1) analyzing the site, (2) solar radiation simulation (3) OTTV simulation and (4) Sunshading simulation.
Immersive Technology as A Tool for Sustainable Architecture
Authors: Suryawinata B A
Published: August 2021

Immersive technology in architecture has begun to be used in the design process. Immersive technology is a computing technology that blurs the boundaries between the real world and the digital world or the simulated world, so that users can feel an atmosphere similar to the real world. Immersive technology includes Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). This paper discusses how immersive technology can be used as a tool for analyzing sustainable architecture. Methodology in this paper uses a literature study research method, the data obtained are compiled, analyzed, and concluded, to get conclusions about the use of immersive technology in architecture. From several literature studies conducted, it can be concluded that immersive technology can be used as a tool to improve architectural sustainability.
Implementation of Child-Friendly School Concept in Elementary School as Early Education Environment
Authors: Pada DM , Sakina B , Bobby Saragih JF
Published: August 2021

Education is one of an important role in enhancing the quality of life thus shaping sustainable communities and cities. In Indonesia, one of the education problems are related to education infrastructure. In elementary school education, there are still many schools that are not in accordance with school policies to implement child-friendly school concept. The purpose of this study was to implement the aspects of child-friendly school and relating it to the problems identified in elementary school. Aspects that need to be considered in supporting the implementation of child-friendly school concept are safety, health, convenience, comfort and security, which will later affect the building design. The research method used is a qualitative method. The results of the study were implementations of each aspect in school building design as a solution to problems identified in elementary school. The implemented aspects can be a consideration for designing school environment in supporting teaching and learning activities.
Characteristics of Jakarta society that need intervention to accord with the concept of Architechnopreneurship
Authors: Wijaksono Sigit , Sasmoko  , Indrianti Yasinta , Suryawinata Bonny A
Published: August 2021

Architecture as a form of application of science, technology and art can change space and the environment as part of human culture and civilization that fulfills the rules of function, construction and aesthetics and includes factors of safety, security, health, comfort, and convenience. Architechnopreneurship is a new concept that combines architectural techniques, technological advances, entrepreneurial values, and education which is applied in the form of housing in flooded areas. This study aims to explore the characteristics of the people of Jakarta who require intervention to have a view that is in accordance with the concept of architechnopreneurship. The research method used is the Neuroresearch method with an emphasis on the confirmatory stage. The Neuroresearch research method consists of three main stages, namely exploratory research, explanatory research, and confirmatory research. The result of the research is that there are differences in the views of the whole of Jakarta about architechnopreneurship based on gender, age, and education. However, there is no difference in the views of people throughout Jakarta about the concept of architechnopreneurship in terms of work.
A Study about office space needs with consideration of supply and demand for office buildings in Jakarta
Authors: Tedja M , Septiani MM , Noegroho N
Published: August 2021

The need for office space in the capital’s business center will continue to grow along with the development of a country’s economy. Often the supply of excess office space is not in accordance with the request. This research aims to analyze why office space supply often does not match with the demand. The results will be obtained is to know the demand for office space what the market wants and the composition of office space to achieve the higest and the best use. The implementation phase of this research is (1) conducting market research and analysis as supporting data regarding the object under study, (2) analyzing supply and demand related to office building development planning, (3) determining the right composition in the procurement of office space.
Playscape Concept for Eco-School in West Jakarta
Authors: Fabriansyah RR , Setiawan D
Published: August 2021

With the background of children’s difficulties in playing and seclusion of children with nature caused by, the prevalence of learning methods with books and electronic media as well as reduced opportunities for children to play in nature, the authors develop a design plan for the Eco-School with Playscape Approach in Jakarta. This design aim is to implements playscape play area. The method used is to follow the study of applicable design methods. The analysis was carried out qualitatively and the design results were in the form of an analysis related to the site, space program, zoning, mass formation and application of an approach which if integrated would produce a design of the Eco-School with the Playscape Approach
Bamboo as local material for hotel interior finishing
Authors: Hakiki Inna A L , Wijaksono Sigit , Mariana Yosica
Published: August 2021

In hotel design, there are 7 aspects of consideration, one of which is the use of cost-effective and efficient local materials, so that the design of this hotel implements the use of local materials which are chosen in the form of bamboo, where bamboo is the largest non-timber forest product in Indonesia. The research used a qualitative method of literature study. Data analysis was carried out based on the selection of the type of bamboo and the choice of space to be used by bamboo in the interior. The result of this research is the use of bamboo for the interior walls of the hotel.
“…the space wider, I can play ball…”: when children thinking about space
Authors: Bobby Saragih JF
Published: August 2021

The Covid19 Pandemic has multidimensional impact, children also strongly felt the impact, they could not do outdoor physical activity, play outside their house and play with their friends. They meet psychosocial stressors affect the health and well-being of children (Liu CH, Doan SN.,2020) The impact of restrictions faced by children, children very stressful, playing is one of the strategies to cope with stress felt by children. Finally, the space inside the house turns into a playground for children. Research conducted using qualitative descriptive methods and analyzed with an ecological model shows that when children play at house, they also think about the space that will be used to play, not just thinking about the dimensions of space but also the flexibility of the furniture and exiting generated by the space. Children play behavior adapt to the conditions faced by children.
CFD Analysis into the Drag Characteristics of Trimaran Vessel: Comparative Study between Standard NPL 4a and the use of Axe-Bow
Authors: Sutiyo  , Ketut Aria Pria Utama I
Published: August 2021

Recently, there has been an increased demand for multihull vessels for military and commercial applications. This demand for multihull vessels is to balance speed with payload requirements. One such hull form is the trimaran. This research conducted a CFD analysis of resistance for trimaran hull forms as a parameter range of practical hull forms is established round bilge trimaran hull forms based on the NPL systematic series and Axe-Bow Modification at the main hull. The resistances of trimaran hull forms are, therefore, estimated by using ANSYS CFX, a commercial CFD software package. Trimaran model was analysed on variation of main hull and side independently, S/L = 0.3 and S/L = 0.4 at Fr = 0.15, 0.2, 0.25, 0.3, 0.4 and 0.5. The results showed that the trimaran ship with the Axe-Bow modification showed better results when compared to the NPL Hull, with an average value of 26.6%. This shows a positive influence with the use of Axe-Bow on the modification of the NPL Hull in the trimaran ship configuration.
Velocity Variation of Opak Fault GNSS Observation Station 2006 Yogyakarta Post-Earthquake
Authors: Widjajanti Nurrohmat , Abdiana Septi Praja , Parseno  , Pratama Cecep
Published: August 2021

The postseismic effects of the 2006 Yogyakarta earthquake was caused by the Opak Fault activity as the possible source still continues. Secular velocity analysis who referred to the velocity which is free from the other deformations than interseismic deformation needs to be done to represent local deformation of the fault. This study was conducted to determine the significance of the difference between the secular velocity without and with postseismic corrections. The secular velocity is determined by the linear least square method. Furthermore, the velocity is calculated its postseismic correction with logarithmic method. This research data includes CORS BIG and Opak Fault station observation data from 2013 to 2018 which is processed using GAMIT/GLRED. Furthermore, the time series data for each station is plotted and analysed, then it is visualized its velocity. The result of this study shows the value of secular velocity each station ranges from 21.676 to 30.997 mm/year and −14.116 to. 2.573 mm/year in the East (E) and North (N) components respectively, and the resultant value of the horizontal velocities range from 22.507 to 32.711 mm/year. The secular velocity resulted with postseismic correction range from 20.735 to 29.864 mm/year and −22.255 to −6.439 mm/year in E and N components, and the resultant value of the horizontal velocities range from 36.963 to 23.281 mm/year. The velocities difference value in the E and N components range from −4.876 to 1.915 mm/year and −1.543 to 14.175 mm/year, and the horizontal velocities values range from −11.035 to 1.260 mm/year. The statistical significance of the two-parameter differences of the whole station, it is concluded that there was no significant velocities difference between the secular velocity values without and with postseismic corrections.
GIS-based multi-criteria analysis to identify site suitability of flood shelters in Kuantan, Malaysia
Authors: Mabahwi Nurul Ashikin Binti , Bhattacharya Yasmin , Nakamura Hitoshi
Published: August 2021

The aim of this paper was to identify site suitability of flood shelters in Kuantan by using GIS based multi-criteria analysis integrated with Analytic Hierarchy Process. Based on the developed criteria range, result shows that, 21% of flood shelters in Kuantan are located at unsuitable places; 32% of the shelters are located at moderate to more suitable site; 39% of the flood shelters are located at very suitable site; and 8% of the shelters are located at extremely suitable site.
Treatment of Tropical stabilized landfill leachate by Adsorption using Powdered Activated Carbon: Isothermal and Kinetic Studies
Authors: Abuabdou Salahaldin M A , Yew Yeoh Hsien , Ahmad Waseem , Aun Ng Choon , Bashir Mohammed J K
Published: August 2021

This study investigates the adsorption removal capacity of chemical oxygen demand (COD), color, and ammoniacal nitrogen (NH3-N) from Sahom stabilized landfill in Kampar, Malaysia by powdered activated carbon (PAC). The effects of shaking speed, contact time, dosage of activated carbon and pH level on the adsorption performance were tested in a batch equilibrium study. Equilibrium data was favorably descried by Langmuir isotherm model. The maximum monolayer adsorption capacity for COD, color and NH3-N were 27.7 mg/g, 172.4 PtCo/g and 4.76 mg/g, respectively and achieved at the optimum conditions of: shaking speed 250 rpm, contact time 4 hours, PAC dosage 4 g/100 ml leachate, and at pH = 9. Effluent’s average removal efficiency was found to be 66.00, 87.63 and 25.89% for COD, color, and NH3-N, respectively. Based on the kinetic data, the adsorption process was controlled by chemisorption as it agreed satisfactorily with the Pseudo-second order model. The regeneration of activated carbon was done thermally via microwave heating. The recovery efficiency for COD, color and NH3-N were found to be 85.47%, 92.65% and 59.53%, respectively. The results revealed the feasibility of PAC adsorbent for the adsorptive treatment of landfill leachate.
Research on Energy-efficiency Building Design Based on BIM and Artificial Intelligence
Authors: Long Rui , Li Yanling
Published: August 2021

The development of architectural design is closely related to computer technology. With the growth of my country’s economy and the rapid development of computer technology in urbanization, artificial intelligence technology has provided new research methods for the construction industry. At present, my country’s construction industry is booming, and building energy consumption is also increasing rapidly. To guide the construction industry to develop energy-efficiency and green, various construction companies actively develop building energy-efficiency technologies. As an emerging technology in the construction industry, BIM technology has had an important impact on parameter setting, cost control, professional collaboration and information management in construction engineering. Based on the development of BIM technology and artificial intelligence technology, this paper explores the specific application of BIM and artificial intelligence technology in energy-efficiency buildings, proposes an energy-efficiency building design framework based on BIM and artificial intelligence technology, and analyses the use of BIM and artificial intelligence in the design of energy-efficiency buildings. The value of innovative technology provides a reference for relevant personnel in the industry.
Sustainable thinking of rural housing in eastern Henan under the context of new countryside
Authors: Guo Zhaoru
Published: August 2021

Rural housing occupies an absolutely dominant position in rural construction. Due to the lack of effective supervision, guidance and training mechanism, the construction team’s professional quality is low in the context of new countryside. The owner’s cognitive level is not high. As a result, the rural housing in the east of Henan Province has many problems. This paper studies the existing problems of rural housing in eastern Henan province and puts forward the solutions. Such as formulating the supervision system of rural construction, perfecting the guiding mechanism of rural housing, training professional construction team, and improving the cognitive level of owners.
A Research on the Evaluation of the Impact of New Buildings on the Environment
Authors: Guifen Lyu , Bei Shang
Published: August 2021

With the acceleration of China’s urbanization process, environmental pollution caused by new buildings has aroused concern. This article starts research from the perspective of the environmental impact of new buildings. Through research and analysis of air quality, water and noise factors in actual cases, the impact of new buildings on the environment during construction and operation periods is compared. Through data analysis, it is found that air quality, noise, and solid waste have a greater impact on the environment during the construction period. After operation, it is mainly water and noise that have a greater impact on the environment.
Neural Network Method Based on Concrete Carbonation Depth Prediction
Authors: Wu Duo , Liu Yuanrong , Yin Yuxue , Deng Zhiyong , Liu Zhifu
Published: August 2021

Carbonation is a typical disease that affects the long-term durability of concrete. In this paper, neural network toolbox in MATLAB software was employed to analyze sample parameters such as CO2 concentration, compressive strength, age and water-cement ratio in concrete carbonation research, and to predict the depth of carbonation. The results show that under the premise of setting reasonable parameters, the sample training results are satisfactory, the average error is about 7%∼14%, which basically meets the precision requirements of the preliminary identification of concrete carbonation depth.
Fracture analysis of magneto-electro-elastic smart materials: a brief review
Authors: Liu Simin , Zhang Huihua , Ji Xiaolei , Han Shangyu
Published: August 2021

The magneto-electro-elastic (MEE) materials are able to effectively realize the mutual transformation among the electric energy, magnetic energy and mechanical energy. They are widely used in many important areas (e.g., in aerospace, biomedicine and intelligent manufacturing) due to their excellent properties. However, owing to low fracture toughness and high defect sensitivity, MEE materials are prone to crack. In this paper, we give a brief summary on fracture studies of MEE smart materials, mainly from analytical and numerical perspectives.
Low Strain Detection and Numerical Simulation of Pile Integrity
Authors: Wei Li-hua
Published: August 2021

The low strain reflected wave method is used to detect the integrity of pile foundation of a domestic bridge, and various types of defective pile models are constructed. A large number of tests are carried out to analyze the complete pile installation and different defects. At the same time, considering the influence of pile material properties, soil parameters around the pile, boundary conditions and damping coefficient on the reflected wave, the test results are compared with the numerical simulation results. The results show that: low strain detection technology is convenient and easy to operate, but due to its own limitations, it should be combined with numerical simulation and other methods to learn from each other, comprehensive analysis, in order to better judge the integrity of the pile.
Study on Parameters setting of Semi Transverse Smoke Exhaust in Subway Tunnel
Authors: Hao Hong , Zhang Guangyuan
Published: August 2021

By using fire dynamics software with PyroSim, the fire smoke flow in subway tunnel with semi transverse smoke exhaust mode is numerically simulated, and a variety of combination modes of semi transverse smoke exhaust are simulated to observe the smoke flow in subway tunnel. The author sets up a variety of smoke exhaust schemes by changing the distance, area and volume of smoke exhaust. The smoke flow and temperature field under different conditions are compared to analyse the exhaust efficiency of each exhaust outlet and the total exhaust efficiency. It provides a reference for the setting of semi transverse smoke exhaust system in subway tunnel.
Identification of the inter-basin water diversion project-effected local flood risk factor by using the fishbone-diagram method
Authors: Minglei Ren , Liuqian Ding , Gang Wang , Guangyuan Kan , Xiaodi Fu , YaFeng Zhu , Liping Zhao
Published: August 2021

When carrying out the inter-basin water diversion project, we must face problems such as the long river routing distance and complex hydro-meteorological conditions along the main channel. Under the condition of the unchangeable standard of the designed rainstorm, the changes of the underlying surface could inflect the designed flood. As a result, the drainage channel is not as consistent as the designed condition, therefore the flood discharge condition in the upper and lower sub-reaches changes, and the actual flow capacity of the hydraulic structure is reduced compared with the designed conditions. The above-mentioned situations could cause risk event of the rising of designed flood level in the left bank and will cause local flood risk, and also cause corresponding economic losses and social impacts. In this study, for the first time, the fishbone-diagram method is applied to identify the local flood risk factors of the inter-basin water diversion project. By using this method, the changes of characteristic values of watershed above cross section, villages, factories or other buildings at the outlet location of the drainage structures etc. are identified as the local flood risk factors, and there are mainly eight types of local flood risk factors which can be taken into consideration when selecting engineering and non-engineering measures to reduce or eliminate the risk factors.

PACS: J0101
Comparative Analysis of Monitoring Results of a Pumped-storage Diversion Bifurcated Pipe with and without Hydraulic Pressure Test
Authors: Gang Cui , Hainian Shan , shulan Wang , xiaochuang Ding
Published: August 2021

The diversion system of a pumped-storage power station has a high water head, and its steel bifurcated pipe has a complex hydraulic structure. When the steel bifurcated pipe is assembled, a hydraulic pressure test needs to be performed to release the residual pressure inside the structure, so as to make sure the steel bifurcated pipe will be in good operation condition when the flow channel is filled with water. The bifurcated pipe is provided with deformation, stress and osmotic pressure monitoring items, which are able to meet the requirements for safe monitoring of the steel bifurcated pipe during operation. Based on the hydraulic pressure test of the steel bifurcated pipe of ➁ diversion system and the prototype monitoring data, it is unnecessary to perform hydraulic pressure test for the steel bifurcated pipe of ➀ diversion system. According to the prototype monitoring data feedback after filling ➀ diversion system with water for operation, the steel bifurcated pipe meets the design requirements, and it is in good operation condition, which shortens the construction period and saves cost for the project.
Analysis on regional differences of water use efficiency rigid constraints and countermeasures in Zhejiang Province
Authors: Su Longqiang , Gao Shang , Yao Shuiping , Su Fei , Chen Yan
Published: August 2021

With the implementation of the most stringent water resources management system, rigid constraints on water resources have gradually increased, the total amount of water used has been effectively controlled. In order to quantify the strength of rigid constraints on water resources, the concept of rigid constraints on water efficiency was proposed, and the constraints on industrial and agricultural water efficiency targets and regional differences in 11 districted cities in Zhejiang Province were analyzed, and the target constraints in the industrial and agricultural water use were comprehensively considered through scenario analysis. Seven types of areas, including industrial and agricultural strong control, agricultural main control, and industrial main control are drawn, and countermeasures for optimizing water resources and water-saving management for different types of areas are put forward to further improve the level of water resources management in Zhejiang Province.
Research on the Key Feature Selection of Supercharger Based on Relief-F Arithmetic
Authors: Guomin Liao , Hujing  , Guichuan Hu
Published: August 2021

Gas-jet supercharger is the core equipment of underground gas storage, whose working performance directly affects the working state of gas storage. Therefore, Relief-F algorithm was used to select the key features to determine the key factors causing the failure of the supercharger. Collecting the main state categories and related characteristic parameters of the supercharger, and calculating the feature scores for the normalized sample set by Relief-F algorithm. At the same time, ranking the feature scores and removing the feature whose importance score is less than the threshold value. Eleven key features, such as engine exhaust temperature I and engine exhaust temperature bar, were obtained, which provide a basis for the fault identification of supercharger.
Research on the Influence of Atmospheric Vertical Refraction on Trigonometric Leveling Survey in Qinling Mountains
Authors: Han Wei , Han Shidong
Published: August 2021

Atmospheric refraction error is one of the main factors affecting the accuracy of precision trigonometric levelling. The influence of it on height difference rises sharply with the increase of horizontal distance. In this paper, the elevation control survey data of Qinling mountains is used to calculate the atmospheric refraction coefficients among the areas in winter and summer, using the method of geometric levelling inverse calculation. Through the analysis of the change law of atmospheric refractive coefficient, the influence of atmospheric vertical refractive coefficient on trigonometric levelling in the Qinling Mountains is summarized, which provides a reference for trigonometric levelling in similar environments.
Research on Unsaturated Test of Residual Clay in Southeast Coast
Authors: haining Liu , qian Wang , shungui Liu
Published: August 2021

Typhoon rainfall is the main inducing factor of landslide disasters in Fujian Province. Rainfall infiltration causes changes in dynamic parameters such as water content of slope rock and soil and surface displacement. The disaster process of landslide disaster has the characteristics of rapid occurrence, short process, and no obvious signs of deformation, so it is difficult to pre-determine the hazard body. Original samples of residual cohesive soil were sampled on site, and an indoor unsaturated strength test was carried out. The influence of changes in moisture content caused by rainfall on the strength characteristics of residual cohesive soil was analyzed. The test results showed that the shear strength of the disabled cohesive soil varies with the strength characteristics of the residual cohesive soil. It differs depending on the water content. The smaller the water content, the greater the matrix suction of the soil, and the greater the shear strength, which is of great significance for subsequent studies on the mechanism of landslide hazards.
Post-Project Analysis Modeling of Environmental Impacts of Coal Mining Based on Structural Entropy Weight-Fuzzy Comprehensive Evaluation
Authors: Xiao-xing Li , Jun-kai Du , Yao Fu , Jing-Jun Liu , Ya-xiao Di , Bo Pang
Published: August 2021

A significant move in the implementation of the ecological civilization construction is to establish a complete post-project analysis model and give full play to its function in environmental management. Starting from the index system established under the PSR framework and the comprehensive assessment method, a post-project analysis (PPA) model was constructed for the environmental impacts of coal mining based on the structural entropy weight-fuzzy comprehensive evaluation, the structural entropy weight method and judging principle of effectiveness of the maximum membership degree were introduced into the model, so that the comprehensive assessment results were reasonable. Through an example analysis, the assessment results basically coincided with the reality, thus verifying the effectiveness of the assessment model.
Force analysis of fabricated box girder bridge based on auxiliary structure
Authors: Tian Jun
Published: August 2021

Prefabricated small box girder bridges have been widely used in urban viaducts and highway bridges at home and abroad. Concrete deck paving and guardrails are well bonded to the main girder, which contributes to the rigidity of the main girder structure. Ignoring the influence of the auxiliary structure of the bridge deck will cause a certain deviation between the structure and the actual state. This paper takes the prefabricated box girder bridge as an example, using the finite element method to analyze the variation of the lateral distribution coefficient of the bridge deck and guardrail and the degree of influence on the main girder force. The calculation results show that the bridge deck pavement has little effect on the lateral distribution coefficient of the main girder, the increase in the rigidity of the main girder by the guardrail cannot be ignored, and the difference in the bearing capacity and stress of the side main girder is significant.
Calculation and Analysis of the Stability of Steel Lining Structure of the Flat Tunnel Manhole in a High-head Power Station
Authors: Li Gaohui , Yang Fei , Yu Xuesong , Wu Du , Wang Huan , Liang Shengchen
Published: August 2021

This article is based on finite element calculation software for finite element model establishment and meshing. Through the stability calculation of the steel lining structure at the connection part of the flat tunnel manhole and main pipe in the diversion water of a high-head hydropower station, it is concluded that the structural design meets the requirements. The calculation result can be a reference for similar projects.
Market Mechanism Framework Design and Prospect of Potential Business Mode Research of Virtual Power Plant for Promoting Clean Energy Development
Authors: Fei Fei , Lin Gujing , Wang Jianjun , Gao Ciwei , Guo Mingxing , Lv Ran , Wang Su
Published: August 2021

With the high proportion and penetration access of clean energy to the power grid, the difficulty of clean power consumption is intensified. The emergence of virtual power plant (VPP) with significant regulatory potential provides a new path to solve the severe problem caused by the rapid development of clean energy. However, the design of VPP transaction varieties and the construction of market mode have not been maturely established at present, which is not conducive to the long-term development of VPP. First of all, this paper designed the transaction varieties that VPP can provide in the power market and ancillary service market. Secondly, the basic framework of VPP participating in market transactions under the promotion of spot market is designed. Finally, the prospects of potential business modes of VPP including providing smart energy services, providing big data value-added services, participating in carbon trading and peer-to-peer energy-trading market are explored, which can fully mobilize the enthusiasm of market participation, realize the sustainable development of VPPs and finally promote the consumption of clean energy.
Application of Iterative Feedback Tuning Method in Superheated Steam Temperature Control System
Authors: Zhou Hui , Zhang Biao , Cao Na
Published: August 2021

Taking a 600 MW supercritical once-through boiler as the study object, this paper designed an IFT-based two-degree-of-freedom (DOF) PID superheated steam temperature control system. Besides, the IFT-PID controller was formed and compared with the conventional tuning method. The simulation results show that this method can be successfully applied to great-inertia and large-lag controlled objects, with evident superiority.
Research on classification method of new energy vehicle information security risk assessment
Authors: Chong Tonghong , Jia Xianfeng , Wu Zhi , Zhao Hao , Liu Tianyu
Published: August 2021

With the rapid development and popularization of intelligent Internet connected vehicle, the automobile and the physical world are combined together, which makes users have strong technology experience and life convenience. While enjoying the convenience and experience brought by the intelligent Internet connected vehicle, we are also faced with the risk of information security in the network world, even the security problems of the network world directly affect the security of the physical world. With the improvement of automobile ‘four modernizations’, the research on information security has become an important topic and research hotspot in the field of automobile. Risk assessment is one of the important research and work contents of automobile information security. Impact valuation is an important indicator of risk assessment. It is very important to determine the optimal cluster number for risk assessment model and risk assessment. In this paper, the fuzzy clustering impact estimates are divided into 2-12 categories during Evergrande’s risk assessment of an electric vehicle. The optimal number of clusters is determined by calculating the mixed F-statistics of each type of data. Conclusion shows that the best clustering number of impact estimates is 5.
Economic analysis and business model exploration of hydrogen transport – Case study of heavy-duty FCV demonstration in China
Authors: Xing Lu
Published: August 2021

Hydrogen is considered an important future energy to achieve a carbon neutral energy system, and transport is the most mature area to start a hydrogen economy. China proposed new policies in 2020 to encourage the development of FCV especially in heavy-duty transport, however little research can provide appropriate framework and practical data for the economic analysis of such demonstration, to provide important and rational support for the decision making of local government. This paper introduces a planned heavy-duty FCV demonstration project in city A, provides a framework for its economic analysis as well as practical data from FCV manufacturers, hydrogen producers and suppliers. Results show comprehensive investment required for such demonstration project, cash flow for the planning period and key impacting factors considering the whole circle of hydrogen production-transmission-refilling-utility. Findings show that FCV application shows better profitability than the hydrogen supply business, and long-term FCV planning targets are crucial to all practical business models; Capex reduction is the common and crucial element to realize commercial application of hydrogen transport, and hydrogen supply chain should be integrated to reduce the overall hydrogen cost.
Mechanism and benefit analysis of resource optimal allocation of China’s trans-provincial and trans-regional power trading
Authors: Lu Yu , Meng Fanbo , Hao Chengliang , Yang Jingying , Song Lei , Tian Zihao
Published: August 2021

Trans-provincial and trans-regional power transactions can optimize the allocation of power resources in China, which has important value. However, due to the lack of in-depth and accurate understanding of the mechanism of resource optimal allocation of trans-provincial and trans-regional power trading, the application effect of trans-provincial and trans-regional power trading is not ideal. This paper analyzes the types and channels of trans-provincial and trans-regional power transactions, then analyzes the mechanism of resource optimization allocation of trans-provincial and trans-regional power transactions. Finally, taking the East China power grid as an example, the paper analyzes the benefits of the optimal allocation of trans-provincial and trans-regional power transaction resources.
A generalized Contou-Carrère symbol and its reciprocity laws in higher dimensions
Authors: Braunling Oliver , Groechenig Michael , Wolfson Jesse
Published: August 2021

We generalize Contou-Carrère symbols to higher dimensions. To an

(
n
+
1
)

(n+1)

-tuple
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="f 0 comma ellipsis comma f Subscript n Baseline element-of upper A left-parenthesis left-parenthesis t 1 right-parenthesis right-parenthesis midline-horizontal-ellipsis left-parenthesis left-parenthesis t Subscript n Baseline right-parenthesis right-parenthesis Superscript times">

f
0

,
…
,

f
n

∈
A
(
(

t
1

)
)
⋯
(
(

t
n

)

)

×

f_0,\dots ,f_n \in A((t_1))\cdots ((t_n))^{\times }

, where

A
A

denotes an algebra over a field

k
k

, we associate an element

(

f
0

,
…
,

f
n

)
∈

A

×

(f_0,\dots ,f_n) \in A^{\times }

, extending the higher tame symbol for

k
=
A

k = A

, and earlier constructions for

n
=
1

n = 1

by Contou-Carrère, and

n
=
2

n = 2

by Osipov–Zhu. It is based on the concept of higher commutators for central extensions by spectra. Using these tools, we describe the higher Contou-Carrère symbol as a composition of boundary maps in algebraic

K
K

-theory, and prove a version of Parshin–Kato reciprocity for higher Contou-Carrère symbols.
Nonmemory Composite Embedded Performance Validity Formulas in Patients with Multiple Sclerosis
Authors: Lace John W , Merz Zachary C , Galioto Rachel
Published: July 2021

Objective

Research regarding performance validity tests (PVTs) in patients with multiple sclerosis (MS) is scant, with recommended batteries for neuropsychological evaluations in this population lacking suggestions to include PVTs. Moreover, limited work has examined embedded PVTs in this population. As previous investigations indicated that nonmemory-based embedded PVTs provide clinical utility in other populations, this study sought to determine if a logistic regression-derived PVT formula can be identified from selected nonmemory variables in a sample of patients with MS.

Method

A total of 184 patients (M age = 48.45; 76.6% female) with MS were referred for neuropsychological assessment at a large, Midwestern academic medical center. Patients were placed into “credible” (n = 146) or “noncredible” (n = 38) groups according to performance on standalone PVT. Missing data were imputed with HOTDECK.

Results

Classification statistics for a variety of embedded PVTs were examined, with none appearing psychometrically appropriate in isolation (areas under the curve [AUCs] = .48–.64). Four exponentiated equations were created via logistic regression. Six, five, and three predictor equations yielded acceptable discriminability (AUC = .71–.74) with modest sensitivity (.34–.39) while maintaining good specificity (≥.90). The two predictor equation appeared unacceptable (AUC = .67).

Conclusions

Results suggest that multivariate combinations of embedded PVTs may provide some clinical utility while minimizing test burden in determining performance validity in patients with MS. Nonetheless, the authors recommend routine inclusion of several PVTs and utilization of comprehensive clinical judgment to maximize signal detection of noncredible performance and avoid incorrect conclusions. Clinical implications, limitations, and avenues for future research are discussed.
Social Media Information Environments and Their Implications for the Uses and Effects of News: The PINGS Framework
Authors: Kümpel Anna Sophie
Published: August 2021

Social media have become a central source for news and current affairs information. This article focuses on the overarching attributes that shape how people come in contact with news, engage with news, and are affected by news on social media. Although all social media are different and change constantly, news experiences on these platforms can consistently be characterized as personalized, incidental, non-exclusive, as well as granularized and social (PINGS). Accordingly, this article introduces the PINGS framework, which acts as a systematization of social media news experiences and can be used to map key opportunities and challenges of using news across various social media platforms. In addition to presenting the framework components, the article also discusses how researchers can investigate PINGS in empirical studies.
A new leadless pacemaker with atrioventricular synchronous pacing replacing a still working VVI leadless pacemaker: a case report
Authors: Moltrasio Massimo , Sicuso Rita , Tundo Fabrizio , Tondo Claudio
Published: August 2021

Background

A new intracardiac leadless pacemaker (ILP) has been developed to ensure atrioventricular (AV) synchrony (AVS) during ventricular pacing (VP). Recent studies have shown the feasibility and safety of accelerometer-based atrial sensing and an improvement in AVS among patients with atrioventricular block implanted with the Micra AV ILP (Medtronic Inc., Minneapolis, MN, USA). However, no data exists about the benefits of a VDD ILP in patients wearing a still working VVI Nanostim ILP (St Jude Medical, St Paul, MN, USA). We describe the feasibility of the procedure and the absence of device-related adverse events in the short-term follow-up.

Case summary

We present the case of a 72-year-old man implanted with a VVI ILP (Nanostim, St Jude Medical, St Paul, MN, USA) on May 2014, who has developed symptomatic high percentage of VVI asynchronous pacing and was treated with an upgrade to synchronous AV pacemaker (PM) ILP—Micra AV (Medtronic Inc., Minneapolis, MN, USA), which has improved symptoms and functional class.

Discussion

Intracardiac leadless pacemakers represent the best current option for patients requiring PM implantation who are at high risk of infection and bleeding. Our case shows that the new AVS ILP is a good alternative to VVI ILP in patients with sinus rhythm and a strong need for VP.
Normal procalcitonin, C-reactive protein, and negative blood cultures in infective endocarditis with a massive residual vegetation: a case report
Authors: Farandzha Dzhem , Shikerova Petranka , Lazarova Gergana , Hazarbasanov Dobri
Published: August 2021

Background

Infective endocarditis (IE) is a serious infection with high morbidity and mortality that involves the endocardial lining of the heart. Most cases of IE are due to bacteria although other atypical micro-organisms can also be involved. Procalcitonin (PCT) is a biomarker that is used in the diagnosis of bacterial infections.

Case summary

We present the case of a 54-year-old patient with bacterial endocarditis who has been regularly visiting his cardiologist for follow-up on a mitral valve prolapse and moderate mitral regurgitation (MR) for the last 11 years. During his last visit, transthoracic echocardiography (TTE) showed a previously non-existent structure on the posterior mitral valve leaflet with severe MR. Blood cultures were positive for Streptococcus viridans. On admission, he had elevated levels of PCT and C-reactive protein which returned to normal values after 4 weeks of intravenous antibiotic therapy. His follow-up blood cultures, taken after normalization of PCT, did not show bacterial growth; however, on TTE he had severe mitral regurgitation and a persistent vegetation which had slightly increased in size after completion of the full antibiotic course. He was referred for mitral valve replacement surgery.

Discussion

Normalization of procalcitonin levels may correlate with negative blood cultures in cases of IE with residual vegetations. The optimal time for surgery in such patients is difficult to define but even in circumstances with less infective organisms such as S. viridans and late in the course of the disease residual vegetations remain a serious risk factor for embolic events. Randomized controlled clinical trials are needed in order to have better recommendations with solid evidence regarding prophylaxis and treatment in IE.