bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of AI Technology in Automatic Control System of Medical Equipment
Authors: Xu Dong , Guo Qiang , Hu Bin , Zhang Feng
Published: September 2021

In this digital age, mankind has also gradually opened up a new intelligent society, especially the emergence of artificial intelligence, marking that human society has entered a completely new page. Medical equipment is one of the key areas for the development of artificial intelligence technology. In the future development, artificial intelligence will certainly be very extensive in this field, and a comprehensive platform for the integration of medical equipment and artificial intelligence will be built, making intelligent medical equipment an important symbol of the development of artificial intelligence. This article first introduces artificial intelligence technology, then talks about the application and development of artificial intelligence technology in medical equipment, and predicts the future development of artificial intelligence in the medical field.
FAFNet: A False-Alarm Filtering Algorithm Base on Deep Learning for License Plate Recognition
Authors: Zhou Qingbiao , Fang Jie , Du Yanming , Gao Kun
Published: September 2021

In this paper, we propose an efficient False-Alarm Filtering Algorithm: FAFNet (False-Alarm Filtering Network) to solve the problems of false-alarm in Chinese License Plate Recognition (LPR) scenes. Firstly, FAFNet is a light-weight convolutional neural network which can solve the false-alarm problems in real time on embedded devices, and has achieved a reasonable performance. Secondly, we propose an approach of model internationalization without any retraining, so that the FAFNet model can be available in foreign LPR false-alarm problems, which reduces the training cost and labor cost. Finally, we create a large dataset with more than 200 thousand images from LPR scenes of the real world, which contains various conditions of false alarm. Our experimental results indicate that the proposed approach performs a high accuracy for filtering the false-alarm problems of different countries and can be used on embedded devices in real time.
Edge Computing Multi-service Fusion Architecture and MEC Health Maintenance key Design Methods
Authors: Deng Yue
Published: September 2021

In the huge network world, if all the data need to be processed in the core area, then the computing power required will be infinite, and our current technology can not reach this level.If the data generated at the edge of the network is directly handed over to the edge nodes of the network for processing, then this problem will be properly solved.Data generated in daily production and life do not need to be directly uploaded to the cloud computing server for calculation, analysis and processing. Data types can be classified. Cloud computing only needs to carry out some important analysis and processing, and build a model of edge computing for edge computing to process some less important data.Therefore, the establishment of edge computing model can solve the problem of insufficient core computing power to a large extent.MEC technology is the effective integration of the wireless network and the Internet, adding computing, storage, data processing and other functions in the wireless network, forming a variety of data processing methods based on the Internet, so as to improve the efficiency of data transmission and reduce communication delay.Starting from the edge computing and taking MEC technology as the core, this paper analyzes and interprets deeply the application of MEC technology in network communication.
RETRACTED: Research on Identity Authentication Mechanism Based on Blockchain under the Background of Internet
Authors: Yang Chengfu
Published: September 2021

With the increasingly severe network security environment and situation, a single means of identity authentication has been difficult to effectively match and adapt to the needs of Internet identity authentication, it is urgent to establish a more rigorous and scientific identity authentication mechanism. Based on this, this paper first analyses the necessity of establishing identity authentication mechanism under the background of Internet, and then studies the value and role of blockchain in identity authentication. Finally, the identity authentication mechanism based on blockchain and its development trend is given.
A Study of the Current State of Development of Internet Technology for Smart Connected Cars
Authors: Kong Chunhua , Zhao Zihan
Published: September 2021

If we say that the most important terminal of the Internet now is the smartphone. In the future, the most important terminal of the Internet of Things will be the car. The car, will become one of the most important dimensions in the Internet of Everything. And the ultimate goal, is zero emissions, zero casualties, zero obstacles - no pollution, no car accidents. Our environment will be cleaner and our travel will be safer. An era of automobiles ruled by traditional fuel cars for more than 100 years is coming to an end, and an era of smart and connected cars is coming. Based on this, this paper explores the current study of Internet technology on the development of smart connected cars.
The Improvement Method of the Auxiliary Tool Holder of the Inner Diameter Tool of the CNC Lathe in the Internet Era
Authors: Chen Guo
Published: September 2021

Regarding how to make better use of the system functions of the CNC machine tool after the transformation and reduce the cost, this paper studies the vertical data lathe system device to demonstrate that the auxiliary tool holder of the inner diameter tool is controlled by the CNC system and the axis control. Through the fusion of NC and PLC to operate the tool change, develop the tool change and tool change PLC program. Test the function of the tool post, and the experiment proves that the tool change of the machine tool is safe, accurate, and has fewer failures. The control standard of the servo tool post is realized, and the resources of the numerical control system are better adopted, and the cost of the transformation is saved on the basis of reducing the hardware devices.
Research on Application of BIM Technology in Computer Aided Architectural Design
Authors: Zhao Tian , Jiang Min
Published: September 2021

With the development of China's national economy and the improvement of science and technology, the design level of domestic architectural engineering has been continuously improved, especially the combination of computer-aided architectural design and BIM technology, which has been highly valued by all sectors of society. The application of BIM technology in computer aided architectural design provides an important auxiliary role for the innovation and development of the construction industry, and is another revolution in architectural design. With the popularization of Internet information technology, digital technology has become an important force to promote economic development. The birth of BIM technology provides a new impetus for the development of the construction industry. Compared with the traditional design mode, computer-aided architectural design has the advantages of more efficient, more convenient and more accurate. This paper makes a brief analysis of BIM Technology and its application advantages, expounds the application function of BIM Technology in computer-aided architectural design, aiming to improve the application level of BIM | technology and promote the effect of computer-aided architectural design.
Research and Implementation of Internet of Things Communication System Based on MQTT Protocol
Authors: Niu Zuoling
Published: September 2021

With the advent of the information age, many communication systems and chat systems have appeared on the market. At present, every system has the function of subscribing to news,and MQTT is the main protocol to realize this function.It mainly uses the IBM bluemix IoT service to build mobile applications and realize device interconnection communication.This paper mainly studies the design and implementation of the Internet of Things communication system,which is based on the MQTT protocol.
Network Reform and Acceptance Technology Optimization of Telecontrol Device Based on Game Theory
Authors: Hu Yarong , Liu Qiangxing
Published: September 2021

At present, the networked transformation technology of telecontrol devices in China is more and more advanced. On the premise of game theory, the network transformation and acceptance technology optimization of telecontrol device are analyzed and discussed. And its application conditions and technical difficulties are analyzed, which have achieved good results in practical application. The existing telecontrol device capacity and processing capacity can no longer meet the demand. A complete upgrade and transformation plan should be designed. The expansion system optimizes the network and utilizes existing technologies without affecting real-time data acquisition and transmission. Implementation.
Design and Implementation of Visualized Substation Inspection Training System Based on Immersive Computer VR
Authors: Dong Yinghua , Zhang Hongqin , Yang Tian , Wang Xueting , Wang Xiujing
Published: September 2021

Immersive virtual reality is to provide participants with a completely immersive experience, which allows users to have a feeling of being in a virtual world.Substation equipment due to long running conditions, so in order to ensure the safe and stable operation of electrical equipment, in practice often require the operators to make regular or irregular patrol inspection was carried out on the field devices or use red line temperature measurement method to monitor the running status of equipment.Visualized substation inspection training system can make staff have a very convenient and scientific work platform when carrying out equipment inspection, so as to improve the quality of equipment inspection work.In this paper, from the analysis of substation inspection work and the establishment of inspection system as a starting point, to the application of visual substation inspection training system for the purpose of comprehensive analysis of visual substation inspection training system in the daily work of the advantages.
Software Design of Machine Learning Model Based on Big Data Analysis
Authors: Zou Feng , Ye Lizhu , He Wenhai , Liu Yunxiang
Published: September 2021

With the advent of the information age, big data analysis technology has been popularized in various fields.Using big data analysis technology has also effectively promoted the development of various fields.This article mainly analyzes the trend of machine learning algorithms in the big data environment,it also designed and studied machine learning models.
Computer Graphic Study of Advanced Manufacturing Technology with Chaos Characteristic Analysis
Authors: Sun Yanling , Chen Ning
Published: September 2021

This paper uses the characteristics of computer graphics to study advanced production technology and carry out chaotic characteristics. AMT applied to the scope of the whole manufacturing process, especially the goals and effects achieved. All reflect that this is a practical technology that is applied to manufacturing and plays a major role in the development of manufacturing and national economy. With the rapid development of computer technology, the research progress of advanced manufacturing technology is also very fast. Chaos is being combined with many disciplines, resulting in new edge disciplines. Scholars gradually use the graphical characteristics of computers to analyze the chaotic characteristics. This paper further researches and uses the computer's imaging features to analyze the chaotic characteristics of advanced manufacturing technology.
Research on Computer Animation Action and Acceleration Technology based on Composition Editor
Authors: Liu Yingjing
Published: September 2021

Traditional animation needs complex animation technology, which is mainly operated by hand. Therefore, traditional animation production needs a lot of work, which will lead to a variety of problems, such as long cycle, high rework rate, high cost and so on. With the development of computer technology, great changes have taken place in animation production, including speed, effect, etc., which has created a variety of methods in two-dimensional and three-dimensional animation production. Through computer-aided, the traditional manual animation technology has been gradually replaced by computer, which has become a key issue in animation art production. By combining the advantages of manual animation and computer animation, we can continuously improve the ability of animation industry. Through the synthesis editor, we can improve the animation action and accelerate technology research, which can achieve a new animation world. First of all, this paper analyzes the commonly used 3D animation production software. Then, this paper analyzes the animation action and acceleration technology.
Research on the Control System Design of Exoskeleton Rehabilitation Robot Based on Pole Assignment Algorithm
Authors: Guo Kai , Li Ming , Han Jun , Bai Zhi
Published: September 2021

Exoskeleton rehabilitation robot control system can effectively ameliorate the rehabilitation quality of patients, reduce the rehabilitation pressure of patients, and can formulate scientific training steps according to the program to help patients recover more quickly, so it has important research and utilization value. Based on this, this paper first analyses the feedback control and pole assignment of the exoskeleton rehabilitation robot, then studies the key technologies of the exoskeleton rehabilitation robot, and finally gives the control system design strategy of the exoskeleton rehabilitation robot.
Research on Power Optimization Operation Based on Computer Analysis of Energy Saving Dispatching and Demand Side Management
Authors: Yang Zhaoguang , Ren Mingyuan , Shao Juan , He Jiongxuan
Published: September 2021

At present, the energy-saving application of power system has become an important means to ensure the sustainable development of social economy. However, there are still many deficiencies and problems in energy-saving dispatching and demand side management of power system, which urgently needs innovation and improvement. Based on this, this paper first analyzes the development status of energy-saving power operation mechanism, then studies the power operation optimization based on computer-based energy-saving dispatching, and finally gives the power operation optimization strategy based on power demand side management.
Research on the Design and Execution of Distributed Electric Vehicle Charging Pile Operation Management System Based on WebGIS
Authors: Li Yufei , Li Suojian
Published: September 2021

The integration of communication tech, data acquisition tech, Web and GIS tech is helpful to improve the automatic operation and management of electric vehicle charging pile, so it has momentous research value. Based on this, this paper first analyses the concept and connotation of WebGIS, then studies the architecture of distributed Electric Vehicle (EV) charging pile operation management system based on WebGIS, and finally gives the function design of distributed EV charging pile operation management system based on WebGIS.
Research on the Application of Electrical Engineering and Electrical Automation in Computer-controlled System
Authors: Zhang Cuiyun
Published: September 2021

Computer-controlled system greatly accelerates the intelligent and info level of electric engineering & automatization realm. Electrical automation also provides a carrier and platform for the application of computer-controlled system. They accelerate each other and cooperate with each other, which has high research value. Based on this, this paper first analyses the process control of electric engineering & automatization, then studies the control framework and bus structure of computer-controlled system, and finally gives the design strategy of computer-controlled system utilization of electric engineering & automatization.
Parametric Design and Simulation Analysis of Electronic Equipment Structure
Authors: Yu Haitao
Published: September 2021

Parametric design of mechanical products should meet the requirements of standardization, generalization and serialization. For existing design examples, computer aided design and parametric design technology are used without destroying design principles and basic structural characteristics. Electronic device products have the characteristics of relatively simple structure and easy serialization. Under the condition of market economy, if the structural design of products can be quickly completed and serialized products can be derived quickly, enterprises will be in a more active position in the fierce market competition. Parametric design technology has a long theoretical precipitation period and application demonstration period. The blank in theory and instability in the application process of new ideas and methods can not be compared with parametric design technology. Aiming at the problems existing in the parametric design of electronic equipment, this paper explores the system opening strategy of parametric design of electronic equipment based on the design requirements of mechanical products and equipment.
Multi Objective Reactive Power Optimization of Distribution Network with Distributed Generation Power Uncertainty
Authors: Tao Yanhui , Yue Weijia
Published: September 2021

Distributed generation will have a lot of adverse effects on the steadiness of the power system, resulting in the power wastage of the Distribution Network (DN) and the destruction of the reactive power balance of the power grid. It is essential to establish a dynamic reactive power optimization model to ameliorate the security, steadiness and economy of the DN. Based on this, this paper first analyses the connotation and typical characteristics of Distributed Generation (DG), then studies the connotation and typical characteristics of DG, and finally gives the multi-objective reactive power optimization strategy of DG DN.
Analysis and Technology Realization of Power Grid Harmonic Detection System Based on ARM Embedded System
Authors: Yue Qianqian , Hu Rui , Zhang Xiaoling
Published: September 2021

In our industrial production, ideally what we get from the grid should be a single power frequency. However, the actual situation is that with the generation, transformation, transmission, distribution and power consumption of the entire power system, as long as the current flows through the nonlinear load, harmonics are likely to be generated. So the detection of these harmonics and effective governance has become one of the requirements of China's power protection. Based on this situation, this paper discusses the analysis and technical implementation of ARM embedded harmonic detection system.
Bridge Crack Detection Algorithm Based on Bilateral-frangi Filter
Authors: Yang Jiang
Published: September 2021

The crack detection algorithm based on Bilateral-Frangi filtering can effectively reduce the influence of noise on the crack detection results at the bottom of the bridge.This algorithm effectively removes noise while enhancing cracks at the bottom of the bridge.Through this algorithm,the data analysis results are more accurate.This effectively provides a new idea for crack detection in high-noise images.
Vehicle Information Collection and Communication System Based on CAN Bus and GPS
Authors: Liu Li , Liu Wei , Peng Kaiqin
Published: September 2021

With the proportion of automobile industry in people's work and life increasing year by year, the automotive intelligent terminal market has ushered in a huge development prospect. On-board information system is a set of control system used to collect, store and display all kinds of information status in the process of automobile running. Controller Area Network (CAN) is a serial communication field bus network that effectively supports distributed monitoring or real-time control. Through the CAN bus technology, the vehicle-mounted intelligent terminal can easily interact with other devices in the automobile, so as to master the running status of the vehicle. The vehicle-mounted 3D acquisition system continuously acquires the traveling position of the measuring vehicle through GPS, and provides geographic coordinates for the 3D spatial images acquired by the measuring vehicle, thus realizing the 3D scene with spatial geographic coordinates. Relying on CAN bus and GPS technology, the vehicle-mounted intelligent terminal can conveniently obtain the surrounding road condition information and send its own vehicle data to the remote control center.
Research on Virtual Platform of Electrical Control of Mechatronics Equipment Based on VRML
Authors: Huang Chongqian
Published: September 2021

Mechatronics specifically refers to mechatronics engineering.In order to maximize the realization of virtual platform control of mechanical and electrical equipment, according to the mainstream direction of today's society to improve the mechanical and electrical integration, but also for the training of basic mechanical and electrical personnel reform, the establishment of mechanical and electrical integration virtual platform in the context of The Times has become particularly important.Electromechanical control simulation platform is aimed at the electromechanical integration of related professional simulation training platform, it can also be secondary development, more can carry out the practical operation of the relevant theoretical knowledge of electromechanical integration.The integrable parts system is composed of integrable parts library and integrable parts combination platform.In this paper, from the establishment of mechatronics simulation platform as the starting point, from the establishment of the system to the compilation of the program to the final operation of the results, the system of the establishment of mechatronics simulation platform analysis.
Research on the Design of Quasi Resonant Flyback Switching Power Supply Based on Electronic Information
Authors: Zheng Feng
Published: September 2021

With the popularization and in-depth development of electrification and electronization, the demand for switching power supply in all walks of life is also constantly strengthened, especially for the key indicators and parameters of switching power supply, such as performance, efficiency and reliability. Based on this, this paper first analyses the connotation and components of flyback switching power supply, then studies the design of quasi resonant flyback power supply, and finally gives the realization path and strategy of quasi resonant flyback switching power supply.
Research on Industrial Online Detection Based on Machine Vision Measurement System
Authors: Bai Ruishuang , Jiang Nan , Yu Le , Zhao Jinyang
Published: September 2021

Machine vision based on image processing has played a huge function in promoting the level of online monitoring of industrial products. It has a broad utilization prospect in the field of industrial online detection, so it has important research value. Based on this, this paper first analyses the principle of machine vision measurement system, then studies the industrial on-line detection utilization of machine vision measurement system, and finally gives the utilization and development prospect of machine vision measurement system in the field of industrial online detection.
Online Transaction Fraud Detection System Based on Machine Learning
Authors: Liu Bocheng , Chen Xiang , Yu Kaizhi
Published: September 2021

With the rapid development of Internet technology, the scale of online transactions is constantly expanding. At the same time, the related network transaction fraud problem has become more significant. Compared with the credit card transaction, the network transaction has the characteristics of low cost, wide coverage and high frequency, which makes the detection of fraud more complex. Aiming at the problem of difficult fraud detection in network transactions, this paper designed two fraud detection algorithms based on Fully Connected Neural Network and XGBoost, whose AUC values can achieve 0.912 and 0.969 respectively. Meanwhile, we designed an interactive online transaction fraud detection system based on XGBoost model, which can automatically analyze the transaction data uploaded and return the fraud detection results to users.
Accurate modelling of 3D-trench silicon sensor with enhanced timing performance and comparison with test beam measurements
Authors: Brundu D. , Cardini A. , Contu A. , Cossu G.M. , Dalla Betta G.-F. , Garau M. , Lai A. , Lampis A. , Loi A. , Obertino M.M. , Siddi B.G. , Vecchi S.
Published: September 2021

This paper presents the detailed simulation of a
double-pixel structure for charged particle detection based on the
3D-trench silicon sensor developed for the TIMESPOT project and a
comparison of the simulation results with measurements performed at
the π-M1 beam at PSI laboratory. The simulation is based on the
combined use of several software tools (TCAD, GEANT4, TCoDe and
TFBoost) which allow to fully design and simulate the device physics
response in very short computational time,
O(1–100 s) per simulated signal, by exploiting
parallel computation using single or multi-thread processors. This
allowed to produce large samples of simulated signals, perform
detailed studies of the sensor characteristics and make precise
comparisons with experimental results.
Latin American cities with higher socioeconomic status are greening from a lower baseline: evidence from the SALURBAL project
Authors: Ju Yang , Moran Mika , Wang Xize , Avila-Palencia Ione , Cortinez-O’Ryan Andrea , Moore Kari , Slovic Anne Dorothée , Sarmiento Olga L , Gouveia Nelson , Caiaffa Waleska Teixeira , Aguilar Guilherme Aparecido Santos , Sales Denise Marques , De Pina Maria De Fatima Rodrigues Pereira , Coelho Débora Moraes , Dronova Iryna
Published: September 2021

The characteristics of urban green space have context-dependent associations with socioeconomic status (SES). Latin American cities provide a unique but understudied context to assess the green space-SES associations. We measured the quantity and quality of green space as greenness from satellite-derived Normalized Difference Vegetation Index, and we modeled the relationship between greenness and SES in 371 major Latin American cities between 2000 and 2015. We found that SES was negatively associated with average greenness at city and sub-city scales, which could be explained by urbanization generally improving SES while reducing the provision of green space. About 82% of the cities and 64% of the sub-cities experienced greening or increases in greenness over time. Although with lower average greenness, cities with higher SES had greater greening; however, it was the opposite for sub-cities. We suggest that greening is more likely to take place in peripheral sub-cities where SES tends to be lower. The findings challenge the belief that places with higher SES have better access to environmental resources and amenities; instead, this relationship is context dependent.
In vitro anti-oxidant property and reduction of hyperglycemia-induced oxidation by hydroalcoholic extract of Phyllanthus emblica in cultured mesangial cell lines
Authors: Sridharan B , Zhang J M , Lee M J
Published: September 2021

The pathology of diabetic nephropathy (DN) is due to long-term poor blood sugar control leading to changes in the filtration unit of the kidneys. However, drugs used to offer renal protection cause many side effects. Therefore, it is necessary to develop a new drug or food supplement that acts on multiple factors of DN. Studies have confirmed that Phyllanthus emblica (PE) has anti-diabetic, free radical scavenging, anti-inflammatory, immune regulation, antipyretic, analgesic, wound healing, anti-atherosclerosis, liver protection, kidney protection, and neuroprotection properties. In this study, we explored the antioxidant activity and ability to maintain redox balance in MES-13 cell line. We performed DPPH and FRAP assay to detect the antioxidant property of PE. SDS-PAGE was performed to understand the changes in the types of protein of the glomerular cells treated (24 hr) with high sugar (25 mM) with/without PE extract (10 & 100 μg/ml). Oxidative stress in cells was detected by RedCC-1 staining. Significant antioxidant activity was shown by the extract (IC50 – 108.9 μg/ml) compared to Trolox (IC50 – 60.9 μg/ml). The protein pattern of high glucose (25 mM) treated cells significantly reduced compared to normal and PE treated cells. Mitochondrial dysfunction and cellular oxidative stress produced by high glucose (intensity - 222.04 units) supplementation was significantly reduced by PE (intensity - 38.67 units). In conclusion, PE extract possesses an antioxidant property that can reduce the glomerular damage and oxidative stress in the cells caused by high glucose exposure
Evaluation of kombucha tea as a feed additive for improving the protein and lipid retention of African catfish (Clarias gariepinus)
Authors: Aprianus M Y , Lamid M , Kenconojati H
Published: September 2021

Kombucha tea is the product of sugared tea fermentation by a symbiotic culture of bacteria and yeast. This beverage contains a high source of the microbial community, such as acetic acid bacteria, lactic acid bacteria, and yeast, which may serve as an alternate source of probiotics. The present study aimed to investigate the effect of dietary enriched kombucha tea at different levels on the protein and lipid retention of African catfish (Clarias gariepinus). A total of 400 fish, with an average initial weight of 5.26±0.11 g, were randomly divided into five treatments. The diet treatment containing different volumes of added kombucha tea (4 mL, 6 mL, 8 mL, and 10 mL per kg of feed) was given and compared to the control, without kombucha addition. The fed was given at satiation three times a day for 30 days. The result showed a significant increase (P<0.05) in protein and lipid retention in the groups that received kombucha tea addition, compared to the control group. Kombucha tea addition at 8 mL/kg of feed resulted in the highest protein and lipid retention, but the addition above this value showed a slight decrease in protein and lipid retention. Overall, the present study proved that the addition of kombucha at the optimum levels in diet could improve the protein and lipid retention of fish, which are related to the fish’s somatic growth. These results provide evidence of the potential application of kombucha tea in the aquaculture industry as a feed additive, especially for probiotic sources.
Effect of andrographolide on the pathological events during the surgical open wound healing process
Authors: Sridharan B , Lin Y L , Liao J W , Wang S , Lee M J
Published: September 2021

Wound healing is an important physiological process and several natural and synthetic drugs are being tested to speed up the process to avoid infection and other undesirable pathological events. Although andrographolide has been reported to be an excellent bioactive compound that can influence multiple pathways in the cells, its wound healing property has not been widely appreciated. In this study, we wanted to exhibit the improvement in the pathological events concerning wound healing process by injecting andro in a surgical wound model in rats. The right paw of female SD rats was operated and after 5 days, pathological events in the operated right paw was observed by staining the sections using hematoxylin & eosin dyes to elucidate the dermal and epidermal changes, while Mason’s trichrome staining was performed on the sections to show the granulation layer formation and provide supporting evidence for angiogenesis and ECM deposition. Pathological score was given to the sections according to the extent of the changes observed and the results suggested that epidermal changes were scored almost similar in both saline and andro injected rats (2-3), while angiogenesis and inflammation were moderately improved in favor of wound healing in the andro injected rats (2.5 & 3.7 respectively) compared to saline-injected rats (3 & 4 respectively). The results clearly suggested that, though the improvement due to andro injection was moderate, these observations might create an awareness regarding the wound healing property of andro. Further studies are required to optimize the dosage of andro to influence the molecular pathways in order to show a better wound healing activity.
Biomass production of Mastigocladus (cyanobacteria) HS-46 in bold basal medium and npk medium to produce high lipid content
Authors: Prihantini N B , Nurmarina A , Handayani S , Sjamsuridzal W , Wardhana W
Published: September 2021

The study about the effect of variation concentration medium NPK to the Biomass Mastigocladus (Cyanobacteria) had been done. The aim of the study was to known the effect of variance concentration of NPK growth media within the biomass production. The other aim of the study was to determine the best concentration NPK growth media for Mastigocladus HS-46 to produce higher biomass with high lipid content. Mastigocladus HS-46 was grown in BBM as a control and NPK growth media as working media. The variance concentration of NPK growth media that had been used for this study were 80 ppm, 160 ppm and 240 ppm. Mastigocladus HS-46 was incubated on 35 °C with light intensity 1500-3000 lux and initial pH 6.5. The growth of Mastigocladus HS-46 was measured by qualitative data based on morphology and color of biomass and quantitative data based on cell diameter size (width cell), biomass weight (mg/mL), and lipid content (%). The result showed that the best concentration for Mastigocladus HS-46 growth was in 240 ppm than BBM, NPK medium 80 ppm, and NPK medium 160 ppm. Based on the highest biomass production was 2.09 mg. mL-1 and lipid content was 57%.
Mesoscopic numerical simulation and experimental investigation of laser powder bed fusion AlCu5MnCdVA alloys
Authors: Lu Pan , Cheng-Lin Zhang , Tong Liu , Jiang-Lin Liu , Chun-Lin Xie , Heng-Hua Zhang
Published: September 2021

AlCu5MnCdVA alloys had high specific strength, good machining and fatigue properties, outstanding electroplating and excellent corrosion resistance. However, due to wide crystallization temperature range, it is hard to realize sequential solidification for AlCu5MnCdVA alloy by traditional casting process. Laser Powder Bed Fusion (L-PBF) has become one of the most promising technology in Metal Additive Manufacturing (MAM). In this study, L-PBF was employed to fabricate AlCu5MnCdVA parts, and both mesoscopic numerical element model and experimental printing were applied to study the feasibility of L-PBF Additive Manufacturing AlCu5MnCdVA alloy. Relative densities, phase analysis and micromorphology were investigated systematically by SEM, EDS and XRD. The laser process parameters window for AlCu5MnCdVA were obtained: volumetric energy density 41–51 J mm−3, laser power 230–240W, laser scanning speed 1200–1325 mm s−1. And the relative density of parts fabricated by L-PBF reached 96.1%. Besides, AlCu5MnCdVA alloy fabricated by L-PBF was mainly consist of α-Al, little other phase such as Al2Cu or Al2Mn3 was detected.
Classification of coal deposited epoxy micro-nanocomposites by adopting machine learning techniques to LIBS analysis
Authors: Jayaganthan Sneha , Babu Myneni Sukesh , Vasa N J , Sarathi R , Imai Takahiro
Published: September 2021

Epoxy micro-nanocomposite specimens incorporated with 66 wt% of silica micro fillers and 0.7 wt% of ion trapping particles as nano fillers, are coated with four different variants of coal. The conductivity of the coal deposited samples is observed to be in direct correlation with the percentage carbon content present in the coal samples. The epoxy micro-nanocomposite specimens coated with different variants of coals were successfully classified by using Laser induced breakdown spectroscopy (LIBS) assisted by various machine learning techniques. It is noticed that the classification through Logistic regression method (LRM) has reflected a higher training as well as testing accuracy of 100% and 98%, respectively when compared to other machine learning methods.
Nitrogen deposition shows no consistent negative nor positive effect on the response of forest productivity to drought across European FLUXNET forest sites
Authors: van der Graaf S C , Janssen T A J , Erisman J W , Schaap M
Published: September 2021

Atmospheric reactive nitrogen (N) deposition is an important driver of carbon (C) sequestration in forest ecosystems. Previous studies have focused on N-C interactions in various ecosystems; however, relatively little is known about the impact of N deposition on ecosystem C cycling during climate extremes such as droughts. With the occurrence and severity of droughts likely to be exacerbated by climate change, N deposition—drought interactions remain one of the key uncertainties in process-based models to date. This study aims to contribute to the understanding of N deposition-drought dynamics on gross primary production (GPP) in European forest ecosystems. To do so, different soil water availability indicators (Standardized Precipitation Evapotranspiration Index (SPEI), soil volumetric water) and GPP measurements from European FLUXNET forest sites were used to quantify the response of forest GPP to drought. The computed drought responses of the forest GPP to drought were linked to modelled N deposition estimates for varying edaphic, physiological, and climatic conditions. Our result showed a differential response of forest ecosystems to the drought indicators. Although all FLUXNET forest sites showed a coherent dependence of GPP on N deposition, no consistent or significant N deposition effect on the response of forest GPP to drought could be isolated. The mean response of forest GPP to drought could be predicted for forests with Pinus trees as dominant species (R
2 = 0.85, RMSE = 8.1). After extracting the influence of the most prominent parameters (mean annual temperature and precipitation, forest age), however, the variability remained too large to significantly substantiate hypothesized N deposition effects. These results suggest that, while N deposition clearly affects forest productivity, N deposition is not a major nor consistent driver of forest productivity responses to drought in European forest ecosystems.
A framework for determining energy use in rural food delivery services: capturing system interdependencies through an agent-based discrete-event approach
Authors: Gee Isabella M , Faust Kasey M , Webber Michael E
Published: September 2021

Food e-commerce has seen significant growth over the past decade that accelerated after the onset of the COVID-19 pandemic. Last-mile transportation and logistics are widely considered the most expensive and least efficient portion of the supply chain and have multiple important energy trade-offs such as cargo capacity and consumer density. Last-mile transportation energy use in rural areas is underrepresented in the literature. This study proposes a hybrid agent-based and discrete event model framework for evaluating the last-mile transportation energy use of van- and car-based food delivery services in a rural community, based on meal-kit and grocery delivery operations, respectively. This framework quantifies last-mile energy use in rural areas, and is demonstrated here using a neighborhood outside of Austin, TX as an analytical testbed. The study focuses on the effects of consumer density, cargo limitations, and vehicle speed. For the conditions examined with this framework, diesel delivery vans use more total energy than passenger cars for the same trip, though a van delivering four orders uses less energy per-order than a car delivering one order. However, there are trade-offs between vehicle type and mileage, cargo capacity, route density, and speed that are particularly important for delivery services operating in rural areas. This framework can be used by service providers to assess route-specific trade-offs for each vehicle and gauge which is preferable for given operating conditions or to evaluate the energy, and thus also cost, impact of expanding their services to rural areas.
Scaled oscillation and level sets
Authors: Altaf Iqra , Csörnyei Marianna , Wilson Bobby
Published: September 2021

We study the size and regularity properties of level sets of continuous functions with bounded upper-scaled and lower-scaled oscillation.
Continuous quantitative Helly-type results
Authors: Fernandez Vidal Tomás , Galicer Daniel , Merzbacher Mariano
Published: September 2021

Brazitikos’ results on quantitative Helly-type theorems (for the volume and for the diameter) rely on the work of Srivastava on sparsification of John’s decompositions. We change this tool by a stronger recent result due to Friedland and Youssef which, together with an appropriate selection in the accuracy of the approximation, allows us to obtain Helly-type versions which are sensitive to the number of convex sets involved.
Rationality of twists of the Siegel modular variety of genus 2 and level 3
Authors: Calegari Frank , Chidambaram Shiva
Published: September 2021

Let 

ρ
¯

:

G

Q

→

GSp
4

⁡
(

F

3

)

\overline {\rho }: G_{\mathbf {Q}} \rightarrow \operatorname {GSp}_4(\mathbf {F}_3)

be a continuous Galois representation with cyclotomic similitude character. Equivalently, consider

ρ
¯

\overline {\rho }

to be the Galois representation associated to the 

3
3

-torsion of a principally polarized abelian surface 

A

/

Q

A/\mathbf {Q}

. We prove that the moduli space 

A

2

(

ρ
¯

)

\mathcal {A}_2(\overline {\rho })

of principally polarized abelian surfaces 

B

/

Q

B/\mathbf {Q}

admitting a symplectic isomorphism 

B
[
3
]
≃

ρ
¯

B[3] \simeq \overline {\rho }

of Galois representations is never rational over 

Q

\mathbf {Q}

when 

ρ
¯

\overline {\rho }

is surjective, even though it is both rational over 

C

\mathbf {C}

and unirational over 

Q

\mathbf {Q}

via a map of degree 

6
6

.
Finiteness theorems for potentially equivalent Galois representations: Extension of Faltings’ finiteness criteria
Authors: Das Plawan , Rajan C.
Published: September 2021

We study the relationship between potential equivalence and character theory; we observe that potential equivalence of a representation

ρ
\rho

is determined by an equality of an

m
m

-power character

g
↦
T
r
(
ρ
(

g
m

)
)

g\mapsto Tr(\rho (g^m))

for some natural number

m
m

. Using this, we extend Faltings’ finiteness criteria to determine the equivalence of two

ℓ
\ell

-adic, semisimple representations of the absolute Galois group of a number field, to the context of potential equivalence.

We also discuss finiteness results for twist unramified representations.
Endpoint Fourier restriction and unrectifiability
Authors: Del Nin Giacomo , Merlo Andrea
Published: September 2021

We show that if a measure of dimensionssonRd\mathbb {R}^dadmits(p,q)(p,q)Fourier restriction for some endpoint exponents allowed by its dimension, namelyq=sdp′q=\tfrac {s}{d}p’for somep>1p>1, then it is either absolutely continuous or11-purely unrectifiable.
Photobleaching step analysis for robust determination of protein complex stoichiometries
Authors: Hummert Johan , Yserentant Klaus , Fink Theresa , Euchner Jonas , Ho Yin Xin , Tashev Stanimir Asenov , Herten Dirk-Peter
Published: September 2021

A reliable and automated single-molecule photobleaching step analysis is presented for protein copy number quantification in complexes containing up to 35 labeled proteins in situ. A combined approach for robust and efficient data analysis and experimental calibration is used.
Knock down analysis reveals critical phases for specific oskar noncoding RNA functions during Drosophila oogenesis
Authors: Kenny Andrew , Morgan Miles B , Mohr Sabine , Macdonald Paul M
Published: September 2021

The oskar transcript, acting as a noncoding RNA, contributes to a diverse set of pathways in the Drosophila ovary, including karyosome formation, positioning of the microtubule organizing center (MTOC), integrity of certain ribonucleoprotein particles, control of nurse cell divisions, restriction of several proteins to the germline, and progression through oogenesis. How oskar mRNA acts to perform these functions remains unclear. Here, we use a knock down approach to identify the critical phases when oskar is required for three of these functions. The existing transgenic shRNA for removal of oskar mRNA in the germline targets a sequence overlapping a regulatory site bound by Bruno1 protein to confer translational repression, and was ineffective during oogenesis. Novel transgenic shRNAs targeting other sites were effective at strongly reducing oskar mRNA levels and reproducing phenotypes associated with the absence of the mRNA. Using GAL4 drivers active at different developmental stages of oogenesis, we found that early loss of oskar mRNA reproduced defects in karyosome formation and positioning of the MTOC, but not arrest of oogenesis. Loss of oskar mRNA at later stages was required to prevent progression through oogenesis. The noncoding function of oskar mRNA is thus required for more than a single event.
Beta vulgaris ssp. vulgaris chromosome 8 shows significant association with geosmin concentration in table beet
Authors: Hanson Solveig J , Dawson Julie C , Goldman Irwin L
Published: September 2021

Geosmin, a degraded sesquiterpene molecule with earthy and musty odor, imbues table beet with its characteristic aroma. Geosmin is heritable and endogenously produced in table beet; its earthy aroma is sought by some consumers but deters others. Geosmin biosynthesis is catalyzed by a bifunctional geosmin synthase enzyme in diverse bacteria and fungi, but a mechanism for geosmin biosynthesis in plants has not been reported. This work employed association analysis and selective genotyping of a segregating F2:3 mapping population to seek QTL associated with geosmin concentration in table beet. GBS reads were aligned to sugar beet reference genome EL10.2, and association analysis revealed two QTL for geosmin concentration on Beta vulgaris ssp. vulgaris chromosome 8. QTL at EL10.2 positions 28,017,624 and 38,488,687 each show effect size 8.7 μg·kg-1 geosmin and explain 8.5% and 6.4% of total variation in geosmin concentration, respectively. Resolution was low due to large recombination bin size and imperfect alignment between the reference genome and mapping population, but population size and selection proportion were sufficient to detect moderate to large effect QTL. This study, the first molecular genetic mapping experiment in table beet, succeeded in finding QTL for geosmin concentration in table beet, and it provides the basis for fine mapping or candidate gene investigation of functional loci for this distinctive sensory trait.
SCIGA: Software for large-scale, single-cell immunoglobulin repertoire analysis
Authors: Ye Haocheng , Cheng Lin , Ju Bin , Xu Gang , Liu Yang , Zhang Shuye , Wang Lifei , Zhang Zheng
Published: September 2021

Background

B-cell immunoglobulin repertoires with paired heavy and light chain can be determined by means of 10X single-cell V(D)J sequencing. Precise and quick analysis of 10X single-cell immunoglobulin repertoires remains a challenge owing to the high diversity of immunoglobulin repertoires and a lack of specialized software that can analyze such diverse data.

Findings

In this study, specialized software for 10X single-cell immunoglobulin repertoire analysis was developed. SCIGA (Single-Cell Immunoglobulin Repertoire Analysis) is an easy-to-use pipeline that performs read trimming, immunoglobulin sequence assembly and annotation, heavy and light chain pairing, statistical analysis, visualization, and multiple sample integration analysis, which is all achieved by using a 1-line command. Then SCIGA was used to profile the single-cell immunoglobulin repertoires of 9 patients with coronavirus disease 2019 (COVID-19). Four neutralizing antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) were identified from these repertoires.

Conclusions

SCIGA provides a complete and quick analysis for 10X single-cell V(D)J sequencing datasets. It can help researchers to interpret B-cell immunoglobulin repertoires with paired heavy and light chain.