bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Basketball Sports Training Based on Virtual Reality Technology
Authors: Li Haifu
Published: August 2021

Physical education is an important part of teaching content, and basketball is an important part of physical education. Taking the effective way carries on the basketball sports training, may improve the student’s physical quality effectively. This paper first explains the concept of virtual reality technology and the necessity of simulation technology, and at the same time the application of virtual reality basketball teaching. And the research of fixed-point shooting based on virtual reality technology is discussed for readers’ reference.
RETRACTED: Research and Implementation of Robot Path Planning Based on Image Recognition Technology under Computer Background
Authors: Gui Wei
Published: August 2021

With the improvement of people’s living standards and the continuous development of science and technology, people have higher and higher requirements for the auxiliary system needed in daily life. In recent years, the robot field, as a hot field, is often concerned by people. At the same time, image recognition technology is well known and has been widely used in daily life, and its unique characteristics can provide some help for robot path planning. Therefore, it is very necessary to study the robot path planning based on image recognition technology under the computer background. This study discusses the principle and application of image recognition technology, the current situation of robot path planning and the application of image recognition technology in the research of robot path planning, which provides a certain basis for solving this problem.
Research on Application of Computer Parameterization Technology in Modern Office Furniture Design
Authors: Hou Zhaoyang
Published: August 2021

With the continuous development of computer technology, modern office furniture design has gradually turned to parametric, process-based, and customized development, but the difficulty lies in the continuous optimization and adjustment of parameters. Aiming at the difficult problems of parametric design, this paper selects and analyzes the modulus and structural characteristics of modern office furniture, summarizes the main calculation formulas, and establishes a parametric characteristic model of furniture, laying a theoretical foundation for practice.
Research on the Influence of Computer Network Teaching Platform Application on the Teaching Process of Higher Mathematics
Authors: Cai Suli
Published: August 2021

With the rapid development of computer, great changes have taken place in China’s higher education, which has gradually changed to online education. With the construction of online teaching platform, it has become more and more convenient for college students. With the increasing demand of online education market, we need to combine education and Internet constantly, which will become the frontier direction of education innovation, especially higher mathematics (hereinafter referred to as HM) course. Advanced mathematics is a basic subject, including advanced mathematics, linear algebra, probability theory and mathematical statistics, which is very difficult for some students. Therefore, through the computer network teaching platform (hereinafter referred to as TCNTP), college students can better understand the HM course, which will gradually change the traditional teaching process. First of all, this paper puts forward the important role of TCNTP. Then, this paper puts forward the SWOT analysis of the influence of TCNTP on the teaching process of HM. Finally, some suggestions are put forward.
Study on the Application of Computer Network Resources in Japanese Teaching
Authors: Li Ya
Published: August 2021

With the popularization of Internet technology, network education has become an important tool in various industries, especially in English, Japanese and other language teaching. Through the network database, we can get rich and systematic Network Resources (hereinafter referred to as NR), which can help students learn Japanese better. With the modernization of education, Japanese teaching (hereinafter referred to as JT) in Colleges has been developing in a diversified direction, which will gradually adapt to the needs of the times. Japanese is a very difficult foreign language to learn, which requires us to carry out a variety of teaching. Through multimedia NR, we can give full play to the role of students’ learning subject. By stimulating students’ interest in learning, students can actively participate in Japanese learning and practice in the Japanese environment. Through the NR, students can get the learning resources they need, which will help students learn Japanese better. This paper analyzes the importance of NR in JT.
Application Research of Computer Application Technology in Engineering Project Management
Authors: He Yong
Published: August 2021

In the engineering project management process, through the use of computer technology, can improve the enterprise management of the comprehensive benefits of engineering projects. This paper first describes the connotation and status quo of project management and the important application advantages of computer technology in project engineering, and discusses the application strategy of computer application technology in project management for the reference of readers.
Research on Computer Realization of Building Fire Safety Assessment
Authors: Feng Xiyang , Liu Fangfang
Published: August 2021

Fire is a kind of sporadic local disaster phenomenon. The building fire in the fire has brought very serious losses to people’s life and property. With the increase of the urban population, the increase of the number of building floors, the increase of the density of urban settlements, and the widespread use of electrical, natural gas and chemical substances in buildings, the possibility of fire and the losses caused by the building are also increasing, especially some houses of longer construction age, lack of fire fighting facilities and serious consequences in the event of fire. In recent years, computer technology has been applied to a certain extent in all fields of our country. The effective use of computer technology has further improved the technical level of building fire safety management, and then realized the automatic management of building fire prevention to some extent. In this case, the fire prevention management of buildings has higher sensitivity and safety, which brings more protection to the safety of people’s lives and property. To understand the application of computer technology in building fire safety management, and then to better apply computer technology, can promote the development of building fire safety management.
Research on Construction of Recommendation System On account of CNN and PMF model
Authors: Luo Hao , Li Zhongwu
Published: August 2021

As an important branch and direction of machine learning, neural network shows its technical superiority in many aspects. However, due to the shortcomings of existing shallow structure algorithms, it is necessary to strengthen the ability to express effects, so as to learn the essential features of data sets from a large number of unlabeled specimens. On account of this, this paper first analyzes the concept and application of CNN network, then studies the algorithm and process of PMF model, and finally gives a recommendation system on account of CNN and PMF model.
Application of Network Imparting Platform in Higher Mathematics Imparting
Authors: Pu Xiuqin
Published: August 2021

This year, online imparting has become a popular topic. Due to the novel coronavirus pneumonia outbreak, schools in China have to stop the students’ return to school and the behavior of imparting under the school’s line. It is because of the emergence of network imparting platform jointly produced by many schools that students can hear the imparter’s lecture in their own home as usual. Higher mathematics has always been a science subject for college students [1]. We know that the learning of offline higher mathematics is very difficult. In this paper, based on the application of network imparting platform, the imparting of higher mathematics course is explored, and the conclusion is drawn.
Innovation and Practice of Computer Applied Talents Training Mode under School Enterprise Cooperation Education Mode based on Big Data
Authors: Wang Yuan , Wang Xueyu , Lin Yingyan
Published: August 2021

The traditional training mode of computer applied talents is not perfect. The course content of the school almost only includes theoretical study. The lack of practical teaching leads to many computer graduates do not meet the requirements of social enterprises [1]. Many school graduates of computer science will not flexibly use the knowledge they have learned. In order to effectively solve this problem, the Ministry of Education decided to adopt the mode of school and enterprise joint education to cultivate computer professional application-oriented talents. The combination of industrial enterprises and education is a key opportunity for school talent cultivation. This paper briefly introduces the traditional university enterprise cooperation of computer personnel training mode and puts forward its main shortcomings. On this basis, this paper puts forward the innovation strategy of computer application-oriented talents training mode under the school enterprise cooperation education mode.
Forecast of Fire Protection Situation in High-Rise Buildings Based on Multi-Sensor Information Fusion
Authors: Geng Liming
Published: August 2021

With the continuous development of modern science and technology and the increase in the amount of multi-sensor information, the prediction of the fire protection situation of high-rise buildings has gradually become a challenge. This paper establishes a prediction system for the fire protection situation of high-rise buildings and uses multi-sensor information fusion technology for high-rise buildings. The building fire protection situation index weight is weighted, and the original sensors are optimized to verify the prediction effect of the high-rise building fire protection situation. The experimental analysis results show that this method can reduce the initiative of the weight of the fire protection index of high-rise buildings and improve the accuracy of prediction.
RETRACTED: Construction of Legal Supervision System for Construction Engineering Based on Cloud Platform
Authors: Xu Jing , Li Zhanfeng
Published: August 2021

The construction industry is the fourth pillar industry in the development of the national economy. In recent years, with the growth of the macro economy, it has also developed rapidly. Because the urbanization develops rapidly, the scale of project construction is getting bigger and bigger, and the quality requirements are getting higher and higher, many problems in the field of construction engineering have gradually exposed. Due to limitations in all aspects, many regulations and systems cannot be systematically and effectively implemented. At the same time, the current domestic and foreign project supervision mostly stay in the “result monitoring”, it cannot achieve the “process monitoring”. At present, the most important topic is to control the progress of the project. The main investors of the project should take early measures to prevent it effectively, in this way, we can ensure the quality of the project and the safety of funds.
Innovative Development of College English Education Based on the Media Information
Authors: Zhang Yue
Published: August 2021

In this paper, in the age of media information, a kind of college English flipping classroom Innovative teaching model dependent on mediation intelligent adjustment algorithm is put forward. Through the visualization of the knowledge points of college English flipping classroom in the English teaching contents, after the learning of the students, the test stack is used to select the targeted test items in accordance with the ability of the student individuals to learn English. And the mediation teaching contents are set on the basis of the test results to the student individuals, so as to achieve intelligent and mediation learning. Finally, through the research and analysis of the Innovative teaching model of college English flipping classroom, compared with the traditional English teaching, flipping classroom Innovative teaching mode that is dependent on the mediation intelligent adjustment algorithm can greatly enhance the interest of students in learning English and speed up their absorption of knowledge. And it will further facilitate the organic integration of the college English flipping classroom teaching method with the traditional education.
Practice and Exploration of Innovation and Entrepreneurship Education for Computer Science and Technology Professionals Based on the Analysis of Big Data
Authors: Yu Xiang , Li Zhongwu
Published: August 2021

According to the analysis of big data, in the process of computer science and technology talent management, it is necessary to take effective technology innovation and development as the core and pay attention to the expansion and promotion of the industry. According to the existing needs of comprehensive computer technology, it is necessary to train professional computer technology talents and strengthen the expansion of the technical model under the professional technology, combined with the existing technical development needs. Moreover, we should constantly integrate the control market of computer science talents, pay attention to the training and improvement of technology and carry out effective implementation of basic knowledge. According to the existing standard mode, we will have to adjust the development demand of specialization to ensure the professional technology integration under the innovation and development of computer specialty.
RETRACTED: The Reform of Digital Media Art Professional Curriculum System Based on Internet Technology
Authors: Zhu Tingting
Published: August 2021

With the rapid development of science and technology today, people’s lives and learning are inseparable from the support of big data, especially in the digital everyday industry. With the rapid development of the digital media industry, relevant technical talents in this industry are also facing huge challenges. The main reason is the shortage of talents and the high-quality requirements for employees [1, 2]. Therefore, there are many problems in the cultivation of mathematics media professionals. For example, due to the lack of established training goals and unreasonable curriculum settings, it is difficult for teachers to teach better [3]. Therefore, based on the internet technology, this article first analyzes the setting of the digital media curriculum system, then analyzes the reasons for the curriculum reform, and finally discusses the planning and implementation of the curriculum reform, hoping that big data will be helpful to the teaching of digital media majors.
Research on the Influence of Computer Electronic Technology on Modern Enterprise Logistics Management Information System
Authors: Zhang Ying
Published: August 2021

With the continuous improvement of logistics supporting service requirements, small and medium-sized transportation logistics enterprises are facing challenges and pressures from multiple dimensions. Therefore, it is urgent to improve the level and ability of logistics management, and to promote the survival and development advantages in the cruel market competition. Based on this, this paper first analyzes the modern enterprise logistics management information system, then studies the data description of the contemporary enterprise logistics management information system, and finally gives the influence of computer electronic information technology on the enterprise logistics management information system.
Research on Intelligent Recognition Technology of Power Consumption Characteristics Based on AdaBoost Model
Authors: Chen Qingtai , Ma Lvbin , Sun Gang , Lin Yinghe
Published: August 2021

The iterative development of intelligent, information and industrial society puts forward more stringent requirements for power system. However, the current perception and prediction of power consumption characteristics are still based on empirical data, lacking of intelligent and lean perception. Based on this, this paper first analyzes the development status of intelligent recognition tech of user’s electricity consumption characteristics and behavior, then studies the process of intelligent recognition of electricity consumption characteristics based on AdaBoost model, and finally verifies the intelligent recognition tech of power consumption characteristics based on AdaBoost model.
Research on Back-to-Back Converter Based on Computer Microgrid and Off-grid Control Theory
Authors: Hu Zhihui , Liu Wenzhou
Published: August 2021

Active and reactive power can be controlled by connecting the two ends of back-to-back voltage source converters to AC power grid. In this paper, the back-to-back converter system and computer microgrid and off-grid control theory and methods are described, and the application field and software design of the back-to-back converter are discussed, for readers’ reference.
On Measurement of Electromagnetic Radiation by Computer System in Indoor Electromagnetic Environment
Authors: Dong Xiangguo
Published: August 2021

The source of electromagnetic radiation in the computer system will not only cause biological effects of electromagnetic radiation on the human body, but also cause pollution to the ecosystem, so the measurement of the amount of electromagnetic radiation in the computer system is particularly important. In this paper, the current situation and types of electromagnetic radiation pollution and indoor electromagnetic environment in the computer system electromagnetic radiation measurement instruction, and electromagnetic radiation occupational protection measures are analyzed, for the reference of readers.
Research on Control Strategy and Central Control System of Intelligent Electric Vehicle
Authors: Liu Lesheng
Published: August 2021

With the continuous improvement of world science and technology, vehicle technology has also been greatly developed. Cars bring convenience to people’s travel, and occupy an increasingly high proportion in social life. Automobile plays an important role in the continuous progress of contemporary society and the change of human travel conditions. At the same time, the increasing number of cars also brings many problems: energy consumption and environmental pollution are worsening, traffic accidents are increasing year by year. According to the who survey, the number of casualties caused by traffic accidents in China is gradually increasing. High traffic accidents have caused irreversible losses to social development, people’s lives and property. It has become the development goal to improve the vehicle active safety, control the vehicle to automatically identify the road, drive according to the planned route and reduce the frequency of traffic accidents. In the traditional driving environment, people occupy a dominant position. In the face of complex and changeable traffic environment and a large number of traffic information, it is easy to make mistakes in driving and cause serious traffic accidents. Therefore, it is very important to extricate the driver from the complex and changeable traffic environment and make driving safer. The intelligent vehicle collects the information about the road and the vehicle itself through the sensor, and sends it to the central controller which controls the transverse and longitudinal movement of the electric vehicle. The central controller sends out corresponding instructions to control the horizontal and longitudinal operation of the vehicle according to the control strategy, so as to realize the control of the driving behavior of the vehicle, so that the vehicle can drive safely on the desired track at the expected speed, It can avoid driver fatigue driving behavior and traffic accidents caused by driving technology. Various sensors in the intelligent vehicle can obtain more vehicle information at the same time, and control the vehicle through the controller processing.
Advantages of Using Computer Multimedia to Assist Public English Teaching in Higher Vocational Colleges
Authors: Zeng Huibin
Published: August 2021

Under the influence of the rapid development of modern educational technology and the deepening of applied linguistics research, computers and networks have begun to enter the field of education (edu) on a large scale, and the traditional classroom teaching concept with teachers as the main body has changed greatly. The research shows that there are 1908 colleges and universities in China, of which 1168 are higher vocational colleges (hvc), which indicates that higher vocational education (hve) occupies half of higher edu.
Construction of Project-Based and School-Based Teaching Material of Visual Identity in Higher Vocational College under the Background of Computer
Authors: Jiang Xiaowei
Published: August 2021

The aim of this research is to construct a kind of project-based and school-based teaching material for visual identity in higher vocational college. This article analyses the main problems of the existing teaching materials of visual identity under the background of computer, and then a series of countermeasures for the construction of project school-based teaching material of visual identity have been proposed, including the construction of the contents of project-based and school-based teaching material, the construction of supporting multimedia resources for teaching material, the construction of “work-process-oriented” teaching material compilation mode and the construction of “circular” teaching material organization form. On this foundation, the research conclusion on the construction of teaching material of visual identity is done.
Stability of Electronic Circuits Based on Complex Neural Network Theory
Authors: Wang Yuxia
Published: August 2021

In recent years, with the widespread application of power electronic equipment in various fields of the national economy, the problem of insufficient stability of power electronic equipment has brought a greater negative impact on the application and promotion of new technologies and the development of the national economy. Therefore, to carry out the stability research of power electronic circuits and find suitable methods to reduce the failure rate of power electronic circuits is of great significance for improving the stability of power electronic circuits and promoting the development of power electronic technology and social progress. The purpose of this article is to study the stability of electronic circuits based on the theory of complex neural networks. In this paper, in order to realize the effective use of power grid electricity, during the low period of power consumption, the energy storage battery is operated in the charging state to store the excess energy in the grid; during the peak period of power consumption, the energy storage battery is operated in the discharged state to the load side of the grid powered by. This paper adds a multi-agent system to the power system and uses the linear time-invariant consistency protocol of the multi-agent system to obtain the net active power of the grid. Then, according to the size of the net active power and the working state of the energy storage battery, it is determined whether switch the working status of the energy storage battery. By calculating the changes in the network efficiency value of the circuit weighted network model when the failure rate of each component in the power electronic circuit changes, find the weak points in the power electronic circuit, and prove that the component’s stability to the power electronic circuit is not only related to the failure of the component itself the rate is related to the position of the component in the circuit. Experimental studies have shown that the resistance of current or control signal transmission becomes smaller, especially when the component D1 or D4 is short-circuited, the circuit network efficiency value increases by about 15%.
Construction of Maker Competencies-Oriented Smart Classroom Model in College English Listening and Speaking Teaching
Authors: Wang Juan
Published: August 2021

Smart classroom, as a new kind of teaching model, has triggered a revolution in China’s educational field. This paper clarifies the teaching model of smart classroom established on the maker competency-oriented learning activities, which generates learners’ English productive ability, innovative thinking, and highlights the self-directed, personalized and creative teaching design in classroom teaching.
Teaching Practice of Data Structure Based On WeChat Platform
Authors: Sun Yahong
Published: August 2021

With the development of the mobile communication network, mobile learning is becoming a hot spot in the world. According to the idea of system engineering, this paper describes the teaching design process based on WeChat, which is divided into three parts, i.e. teaching preparation, teaching implementation and teaching evaluation. It also elaborates on the specific activities of each stage. The result shows that teaching activities based on the WeChat platform can promote students’ learning and have certain practical significance.
Blockchain Technology in Open University Distance Open Education
Authors: Li Zhuoya , Zhao Qiulan
Published: August 2021

For distance education, the application of computer network and software technology is very important to open teaching and management. This paper mainly studies the application of blockchain technology in the field of Open University distance education. Blockchain technology, as a new type of decentralized trust structure technology, provides necessary support for distance open education in teaching resource utilization, teaching process control, teaching effect evaluation and teaching management, and provides an effective foundation for teachers and students to participate in distance teaching practice together. This paper adopts a hierarchical network architecture and hierarchical storage structure, which has good scalability and node transparency, provides support for user service strategy in large-scale applications.
Highway Bridge Test Detection Technology and Application Method Based on Big Data
Authors: Huang Qunjie
Published: August 2021

With the rapid development of transportation, highway bridges as a transportation hub have played an important role and become the link of economic development in the region. In recent decades, my country has built many types of highway bridges. During the construction and operation of these bridges on highways, many inspection activities are required to ensure the quality of construction and operational safety. This article mainly introduces the highway bridge test detection technology and various application methods based on big data. This paper uses big data to detect the dynamics of the highway bridge structure and establish a load test model. The model is solved by the energy-releasing method to strengthen the rigid structure of the highway bridge, evaluate the road condition, and use historical data to revise the model to improve the accuracy of the highway bridge load. The experimental results in this paper show that the highway bridge detection technology based on big data reduces accidents by 23%, and the test and evaluation results under big data show that the performance of highway bridges is excellent and meets the design.
Application of Blue Ink Cloud Class in College English Cooperative Learning
Authors: Yan Lu
Published: August 2021

The use of Blue ink cloud class is convenient for college English online and offline blended college English teaching model. This paper constructs a new cooperative learning strategy for college English group based on Blue ink cloud class teaching platform, which improves the effectiveness of College English teaching effectively. The study provides a new perspective for the reform of College English Teaching under the “the Internet +”.background.
Development Trend of Agricultural Brand E-commerce Mode from the Perspective of New Media
Authors: Liu Shihai , Gao Ziyuan , Zhu Xialing
Published: August 2021

With the deepening of reform and opening up, China’s economic construction level has been greatly improved, and the progress of social economy has enhanced consumers’ brand awareness to a certain extent. This paper mainly studies the development trend of agricultural product brand e-commerce model from the perspective of new media. This paper expounds the agricultural product brand design in new media environment elements and principles to follow, with new media, the characteristics, properties, methods, such as theoretical knowledge as the foundation, through the spread of new media commonly used methods for analysis, and combining the domestic and international excellent brand promotion, brand image design of agricultural products in the new media to make certain guidance and explored.
Research on the Live Broadcast Operation Strategy of Agricultural Products E-commerce
Authors: Ren Zhijun
Published: August 2021

With the national rural revitalization programme and the development of e-commerce in rural areas, live broadcast of agricultural products has bccome hotspots recently. Farmers hope to catch the express train of live broadcastm, sell agricultural products and broaden the road towards wealth. However, there are constraints on internalconditions and external environment on live streaming. That is, in terms of internal conditions, live broadcast of agricultural products is restricted by product attributes, live streaming talent and online netwok technology and operating experience. In terms of external environment, with the competition and reconstruction of the online live broadcast platforms in 2020, the threshold for live brodcast will be raised, and agricultural products are still unpopular in the live broadcast e-commerce industry. Live streaming of agricultural products is in those low-frequency items. The article proposes an operatoin strategy in the live broadcast for agricultural products of average farmer households based on SWOT analysis, and then proposes its implementation principle of minimizing constraint conditions + maximizing product value, which can help average farmers use e-commerce channels to operate a practicable livebroadcast.
The Construction of Problem-based Learning and Communication Platform
Authors: Ming Qiaoying
Published: August 2021

Based on the investigation and survey of the existing communication platforms, aided by modern information technologies, this article constructs the problem-based learning and communication platform with user-friendly interface and straightforward operation. The primary functions of the platform include: user’s questioning and answering, sharing materials and resources related to the problem, releasing new professional knowledge of the industry, the domain-specific categorization of problems etc. The application of the platform achieves the real-time unlimited interaction and exchange between teachers, students and industry experts, inspiring learners motivations and initiative, enhancing learner’s problem-solving capabilities.
A Dual-Mode Dielectric Filter for 5G System
Authors: Luo Bing , Zhan Zhong-Shan , Fang Bo , Zhang Yong-Liang
Published: August 2021

Based on 5G system, a cylindrical dual-mode resonator and filter are designed. The electric field distribution characteristics of each mode of the dual-mode resonator are analyzed by using high-frequency electromagnetic field simulation software. Based on the designed dual-mode resonator, through theoretical calculation and analysis, a 5G system dielectric dual-mode filter is designed by using the RF / microwave simulation software ADS/HFSS. The coupling between modes is realized by setting metal screw perturbation on surfaces. The effect of two coupled degenerate modes is equivalent to that of two coupled resonators, so that the number of resonators can be reduced while the resonant circuit remains unchanged. For example, two modes of a resonator can be used in a traditional n-section filter, the same physical space realizes the characteristic of 2n section filter, which greatly reduces the size of the filter. A 5G system dielectric filter is designed based on dual-mode resonator. The results show that in the pass-band (3.4 ∼ 3.5GHz), the return loss is more than 18db, the insertion loss is less than 0.3dB, the zero on the left side of the pass-band is 3.1716GHz, the zero on the right side of the pass-band is 3.8537GHz, the VSWR is less than 1.28. Transmission zeros are introduced on both sides of the pass-band, which improves the suppression ability out of pass-band. The 5G system dielectric filter has the advantages of low insertion loss, small size and good suppression performance out of pass-band. When applied to 5G wireless communication system, the anti-interference ability and stability of the system can be improved.
Biophysical permafrost map indicates ecosystem processes dominate permafrost stability in the Northern Hemisphere
Authors: Ran Youhua , Jorgenson M Torre , Li Xin , Jin Huijun , Wu Tonghua , Li Ren , Cheng Guodong
Published: August 2021

The stability of permafrost is of fundamental importance to socio-economic well-being and ecological services, involving broad impacts to hydrological cycling, global budgets of greenhouse gases and infrastructure safety. This study presents a biophysical permafrost zonation map that uses a rule-based geographic information system (GIS) model integrating global climate and ecological datasets to classify and map permafrost regions (totaling 19.76 × 106 km2, excluding glaciers and lakes) in the Northern Hemisphere into five types: climate-driven (CD) (19% of area), CD/ecosystem-modified (41%), CD/ecosystem protected (3%), ecosystem-driven (29%), and ecosystem-protected (8%). Overall, 81% of the permafrost regions in the Northern Hemisphere are modified, driven, or protected by ecosystems, indicating the dominant role of ecosystems in permafrost stability in the Northern Hemisphere. Permafrost driven solely by climate occupies 19% of permafrost regions, mainly in High Arctic and high mountains areas, such as the Qinghai–Tibet Plateau. This highlights the importance of reducing ecosystem disturbances (natural and human activity) to help slow permafrost degradation and lower the related risks from a warming climate.
A surface modified microbial polymer inactivates quorum sensing molecules and incapacitates Sphingomonas paucimobilis biofilm formation in plumbing material
Authors: Gulati Parul , Ghosh Moushumi
Published: August 2021

We report the potential antibiofilm properties of a chemically modified biopolymer on the formation of biofilms by Sphingomonas paucimobilis MG6 an opportunist pathogen isolated from distributed drinking water systems. The biopolymer obtained from the producer bacteria K. terrigena was quarternized and examined for safety using RAW 264.7 cell lines. The modified biopolymer (N-methyl biopolymer: NMB) at 1mg/ml inactivated AHL homologs of S. paucimobilis at ambient temperature. GC-MS and C. violaceum biosensor assays were used to evaluate loss of AHL molecules. On NMB coated coupons loss of biofilm formation under static conditions, was visualized by a rapid calcofluor assays and scanning electron micrographs (SEM). Applicability was further investigated in a flow through apparatus afforded with different plumbing materials, coated with NMB. Leaching of NMB was not observed and a complete absence of biofilms was noted on coated materials, especially in PVC. SEM and viable counts corroborated these observations. Overall, results of this study suggest that the novel material offers as a potential sustainable approach for controlling biofilms in drinking water systems.
Protein Structure and Function Prediction of SARS-CoV 2: Prospective Antivirus Active Drug Binding Sites
Authors: Sharma Shivi , Maheshwari Shefali
Published: August 2021

Today a newly emerged corona-virus known as SARS-CoV 2 has become a cause of global health concern and took away the lives of large number of people throughout the world. Corona-viruses are the enveloped virus with positive single stranded genome of 26.4 to 31.7 kb. Envelop of the corona-virus is made up of four structural proteins namely envelop protein (E), membrane protein (M), spike protein (S) and nucleocapsid protein (N). These four proteins are responsible for the overall shape and size of the virus (structure of virus). Envelop protein forms ion channels, membrane protein is responsible for the shape of the virus, spike protein is responsible for the entering inside the target host cell by binding to host receptor and nucleocapsid protein binds to the single stranded RNA genome of the virus forming multiple copies. We investigate the reliability and homogeneity among all the corona-virus species such as MERS CoV, Bat-CoV HKU4, Transmissible gastro-enteritis coronavirus (TGEV), Porcine epidemic diarrhea virus (PEDV), HCoV-229E and Whale-CoV SW1, M-CoV, Hedgehog coronavirus 1, Bulbul-CoV HKU11 etc, using a binary graph which is helpful in the findings of sequence reliability, secondary and tertiary structure model prediction using advanced model builder, we build the model of various protein/gene products by selecting them from SARS-COV 2, which further helpful in the finding of target-ligand binding for future therapeutic applications. Consequently by modeling the structure of the proteins we bring into being that envelop protein have pentameric protein lipid pores that allow ion transportation and were able to depict the active drug binding sites.
Experimental studies on utilization of Coarser Fly Ash in Concrete
Authors: Meshram V.G. , Pande A.M. , Borghate S.B.
Published: August 2021

Fly ash is abundantly available in India. IS 3812 Part I & II regulate its usage in cement and concrete. It is well known fact that fineness of fly ash goes on increasing from boiler end to chimney, however the output goes on reducing. Past research normally indicate usage of finer (Hopper no. 4 & 5) fly ash in cement and concrete. Japan has upgraded its standards and specifications to accommodate all grades of fly ash available. The present research by the authors on all grades of fly ash samples through compressive strength development indicate all grades of fly ash can be used in concrete with a precaution that their performance should be investigated before use. Through graphical representations of test results presented in the paper, it is justified that coarser fly ash can very well be used in concrete making as per strength requirements.
The Growing Use of Nanotechnology in the Built Environment: A Review
Authors: Ghosal M , Chakraborty A
Published: August 2021

Though the past industrial revolutions had unleashed many of the world’s current problems including the Covid-19 virus but the 4th industrial revolution promises a sustainable future through the use of advanced materials like Nanotechnology. Not at all new, the use of this disruptive technology had its footprints in the pages of history - Ajanta Paintings, Damascus Sword & many others. Nano Titanium dioxide (58%) and Nano silica (21%) are the most used advanced materials in the nanotechnology-based building products while China in Asia and Germany in Europe are the two leading countries in the field of production of nanomaterials for building industry. India has been amongst the five top countries globally for technical publications in nano sciences & technology. This paper delves into the world of advanced nanomaterials and studies their impact on the construction industry vis-a-vis the built environment in India and abroad.
Entangled ripples and twists of light: radial and azimuthal Laguerre–Gaussian mode entanglement
Authors: Valencia Natalia Herrera , Srivastav Vatshal , Leedumrongwatthanakun Saroch , McCutcheon Will , Malik Mehul
Published: August 2021

It is well known that photons can carry a spatial structure akin to a ‘twisted’ or ‘rippled’ wavefront. Such structured light fields have sparked significant interest in both classical and quantum physics, with applications ranging from dense communications to light–matter interaction. Harnessing the full advantage of transverse spatial photonic encoding using the Laguerre–Gaussian (LG) basis in the quantum domain requires control over both the azimuthal (twisted) and radial (rippled) components of photons. However, precise measurement of the radial photonic degree-of-freedom has proven to be experimentally challenging primarily due to its transverse amplitude structure. Here we demonstrate the generation and certification of full-field LG entanglement between photons pairs generated by spontaneous parametric down conversion in the telecom regime. By precisely tuning the optical system parameters for state generation and collection, and adopting recently developed techniques for precise spatial mode measurement, we are able to certify fidelities up to 85% and entanglement dimensionalities up to 26 in a 43-dimensional radial and azimuthal LG mode space. Furthermore, we study two-photon quantum correlations between nine LG mode groups, demonstrating a correlation structure related to mode group order and inter-modal cross-talk. In addition, we show how the noise-robustness of high-dimensional entanglement certification can be significantly increased by using measurements in multiple LG mutually unbiased bases. Our work demonstrates the potential offered by the full spatial structure of the two-photon field for enhancing technologies for quantum information processing and communication.
Calculation of vapor-liquid equilibrium of binary precious metal alloys using modified molecular interaction volume model
Authors: You Yanjun , Xu Junjie , Kong Lingxin , Xu Baoqiang , Yang Bin
Published: August 2021

In this work, the activities and activity coefficients of binary precious metal alloys (Ag-Pb, Ag-Sb, Ag-Bi, Au-Pb, Pd-Pb, Pt-Pb and Cu-Pb) were predicted using molecular interaction volume model (MIVM), modified MIVM (M-MIVM), Wilson equation and nonrandom two-liquid (NRTL) model. The average standard deviation and average relative deviations of these models were also calculated. The results show that the prediction deviations of the M-MIVM were smallest among the four thermodynamic models, indicating that the M-MIVM is reliable. On this premise, the separation coefficient and vapor-liquid equilibrium (VLE) data of Ag-Pb, Au-Pb, Pd-Pb and Pt-Pb were calculated based on the M-MIVM. The results show that the separation coefficients were much larger than one, indicating that these alloys can be easily separated by vacuum distillation. There is good agreement between the predicted and experiment VLE data, indicating that M-MIVM is reliable for the VLE calculation in vacuum distillation. The VLE phase diagrams procured in this work can afford theoretical guidance for experimental design and industrial production in vacuum distillation.
A note on holomorphic families of Abelian varieties
Authors: Li Mu-Lin
Published: August 2021

Let

π
:
X
→
Δ

\pi :X\to \Delta

be a smooth family of complex manifolds. Suppose that

X
X

is Kähler and the fibers

X
t

X_t

are biholomorphic to

S
S

for all

t
∈

Δ
∗

≔
Δ
∖
0

t\in \Delta ^*≔\Delta \setminus 0

, where

S
S

is a fixed complex manifold. We prove that the central fiber

X
0

X_0

is biholomorphic to

S
S

when

S
S

is an Abelian variety or a holomorphic principal bundle of Abelian varieties over a smooth curve

T
T

with genus

g
(
T
)
>
1

g(T)>1

.
Gaussians never extremize Strichartz inequalities for hyperbolic paraboloids
Authors: Carneiro Emanuel , Oliveira Lucas , Sousa Mateus
Published: August 2021

For

ξ
=
(

ξ
1

,

ξ
2

,
…
,

ξ
d

)
∈

R

d

\xi = (\xi _1, \xi _2, \ldots , \xi _d) \in \mathbb {R}^d

let

Q
(
ξ
)

≔

∑

j
=
1

d

σ
j

ξ
j
2

Q(\xi ) \colonequals \sum _{j=1}^d \sigma _j \xi _j^2

be a quadratic form with signs

σ
j

∈
{
±
1
}

\sigma _j \in \{\pm 1\}

not all equal. Let

S
⊂

R

d
+
1

S \subset \mathbb {R}^{d+1}

be the hyperbolic paraboloid given by

S
=

{

(
ξ
,
τ
)
∈

R

d

×

R

 
:
 
τ
=
Q
(
ξ
)

}

S = \big \{(\xi , \tau ) \in \mathbb {R}^{d}\times \mathbb {R}\ : \ \tau = Q(\xi )\big \}

. In this note we prove that Gaussians never extremize an
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper L Superscript p Baseline left-parenthesis double-struck upper R Superscript d Baseline right-parenthesis right-arrow upper L Superscript q Baseline left-parenthesis double-struck upper R Superscript d plus 1 Baseline right-parenthesis">

L
p

(

R

d

)
→

L

q

(

R

d
+
1

)

L^p(\mathbb {R}^d) \to L^{q}(\mathbb {R}^{d+1})

Fourier extension inequality associated to this surface.
A new characteristic subgroup for finite 𝑝-groups
Authors: Flavell Paul , Stellmacher Bernd
Published: August 2021

An important result with many applications in the theory of finite groups is the following:

Let

S
≠
1

S \not =1

be a finite p-group for some prime p. Then

S
S

contains a characteristic subgroup

W
(
S
)
≠
1

W(S) \not = 1

with the property that

W
(
S
)

W(S)

is normal in every finite group

G
G

of characteristic

p
p

with

S
∈
S
y

l
p

(
G
)

S \in Syl_p(G)

that does not possess a section isomorphic to the semi-direct product of

S

L

2

(
p
)

SL_{2}(p)

with its natural module.

For odd primes, this was first established by Glauberman with his celebrated

Z
J

ZJ

-Theorem.

The case

p
=
2

p=2

proved more elusive and was only established much later by the second author. Unlike the

Z
J

ZJ

-Theorem, it was not possible to give an explicit description of the subgroup

W
(
S
)

W(S)

in terms of the internal structure of

S
S

.

In this paper we introduce the notion of “almost quadratic action” and show that in each finite p-group

S
S

there exists a unique maximal elementary abelian characteristic subgroup

W
(
S
)

W(S)

which contains

Ω
1

(
Z
(
S
)
)

\Omega _1(Z(S))

and does not allow non-trivial almost quadratic action from

S
S

. We show that

W
(
S
)

W(S)

is normal in all finite groups

G
G

of characteristic p with

S
∈
S
y

l
p

(
G
)

S \in Syl_p(G)

provided that

G
G

does not possess a section isomorphic to the semi-direct product of

S

L

2

(
p
)

SL_{2}(p)

with its natural module. This provides a unified approach for all primes

p
p

and gives a concrete description of the subgroup

W
(
S
)

W(S)

in terms of the internal structure of

S
S

.
KIF18B is a cell type–specific regulator of spindle orientation in the epidermis
Authors: Moreci Rebecca S. , Lechler Terry
Published: August 2021

KIF18B is required for spindle orientation in hair follicle placodes but not the interfollicular epidermis. Disruption of spindle orientation causes cell fate specification defects in hair follicle progenitors.
Atheism: A Very Short Introduction
Authors: Baggini Julian
Published: August 2021

Atheism: A Very Short Introduction discusses the case for atheism. Atheism is often seen as simply a rejection of theism, but it encompasses so much more. Atheists are typically naturalists, who believe that meaning and morality are possible in a finite, natural world. ‘New Atheism’, a powerful new movement in atheism in the early 21st century, driven by books from authors such as Richard Dawkins and Sam Harris, has left a legacy. There is an important question to consider: whether East Asia has been historically atheist or not. Atheism can be located in recent European history. What is the position of atheists around the world today?
What is atheism?
Authors: Baggini Julian
Published: August 2021

‘What is atheism?’ examines what atheism is. Atheism is simply the belief that there is no God or gods. The atheist’s rejection of belief in God is usually accompanied by a broader rejection of any supernatural or transcendental reality. Indeed, the atheist is almost always a naturalist, believing that there is only the natural world and not any supernatural one. Materialism goes one step further than basic naturalism and claims that the only things that are real are material objects, made up of atoms and sub-atomic particles. This view was eventually replaced by the more sophisticated physicalism.