bluuebunny/crossref_metadata_2025_split huggingface dataset:
Buckling and post-buckling of FRC laminated beams in thermal environment using a generalized higher-order shear deformation zig-zag beam model
Authors: Jin Qiduo , Ren Yiru 
Published: May 2020

Abstract
The thermal buckling and post-buckling of fibre-reinforced composite (FRC) beams are analyzed based on a generalized higher-order shear deformation zig-zag beam theory (RHDZT). The current zig-zag beam model satisfies the stress boundary conditions on the upper and lower surfaces and the reality that the shear strain is discontinuous at the layer interfaces. The material properties of FRCs are assumed to be temperature independent and the in-plane boundary conditions supposed immovable. By using the Hamilton variation principle, the governing equations are established based on the mid-plane of the beam. A two-step perturbation method is employed to obtain the approximate analytical solutions of the critical thermal buckling loads and post-buckling behaviors with clamped-clamped boundary conditions. The critical buckling results based on the zig-zag model and its degenerate equivalent single-layer models are compared and verified with those in the literatures. The post-buckling results of the FRC beams with different slenderness ratios, elastic modulus ratios and ply angles are investigated. Numerical results show the remarkable accuracy of the current model and also demonstrate the significant roles the above-mentioned effects play in the buckling and post-buckling problem of FRC laminated beams.
Impact characteristics of railway bridge with double-block supported track considering carriage oscillation loads
Authors: Wang Yuchen , Sun Zhi 
Published: May 2020

Abstract
In this study, the impact characteristics of a typical railway bridge with ballastless double-block supported track under moving train considering carriage oscillation load is investigated. The train load is modelled as a constant force superimposed with a harmonic force whose frequency is the heaving oscillation frequency of the carriage. The bridge-track system is discretized and modelled using the double-beam elements connected using the elastic springs and viscous dampers. Numerical computations are conducted to investigate the bending moment impact characteristics of the supporting bridge considering the variations of moving speed and oscillating frequency of the moving load. The result shows that the harmonic loads due to the carriage heaving oscillation will induce some important bending moment impact amplification and peak response offset for the studied bridge in operation.
Vibration characteristics and stability of a moving membrane with variable speed subjected to follower force
Authors: Wu Jimei , Qing Jiajuan , Shao Mingyue , Wang Yan , Li Ni , Ruan Miao , Liu Dingqiang 
Published: May 2020

Abstract
In this paper, the vibration characteristics and stability of a moving membrane with variable speed subjected to follower force are studied. The vibration differential equation of the moving membrane is deduced by the D’Alembert principle. The intermediate variables of the differential equation are discretized by the Differential Quadrature Method, and the state equation with periodic coefficients is obtained.The state equation is solved by the implicit Runge-Kutta method. According to the Floquet theory, the dynamic stability region and instability region of the membrane are obtained, and the influence of the tension ratio, aspect ratio, average velocity and the follower force on the unstable region of the moving membrane are analyzed. This result provides theoretical guidance and basis for the design, manufacture and stability of the printing press.
Analysis on Existence of New Stable Attitude of Spatial Flexible Damping Beam
Authors: Xu Mengbo , Hu Weipeng 
Published: May 2020

Abstract
In my previous works, the attitude stability of the spatial flexible damping beam was investigated employing the structure-preserving method and a new stable attitude was found when the non-sphere perturbation effects were considered. But the new stable attitude state is lack of theoretical explanation. In this paper, the existence of the new stable attitude of the spatial flexible damping beam with the non-sphere perturbation will be discussed referring to the coupling dynamic model describing the couple motion between the orbit motion, the attitude evolution and the transverse vibration of the spatial flexible damping beam. The conclusions obtained in this paper illustrate the existence of the new stable attitude of the spatial flexible damping beam and verifies the numerical results presented in my previous job.
Analysis and research on wheel steering motion of four-wheel locomotive
Authors: Zhao Jie , Wang Yan 
Published: May 2020

Abstract
Main purpose of this paper is to analyze the kinematics characteristics of four-wheeled vehicles. Based on the kinematic discrete recursion formula and the kinematic relationship between the wheel and the fuselage, the kinematic discrete recursive model of the system is established, and the theoretical formulas of the front wheel steering and four wheel steering vehicle models are derived respectively. At the same time, Simulink was used in Matlab to simulate the driving process of the four-wheeled vehicle, and the steering angle of the wheel relative to the vehicle body and the trajectory of the front and rear wheels during the driving of the four-wheeled vehicle were obtained. The derived model data is used to simulate the satellite positioning wheel trajectory, and the variation law of the wheel steering angle during the driving process of the four-wheeled vehicle is obtained. The correctness of the analysis process and method is verified by theoretical derivation and numerical simulation, which provides a theoretical basis for the study of kinematics characteristics of smart cars in the future.
Theoretical studies on biological additives preparation in a blender with a sinusoidal blade paddle mixer
Authors: Fomina M V , Chupshev A V , Teryushkov V P , Konovalov V V , Mishanin A 
Published: May 2020

Abstract
The purpose of the research is to establish the relationship of the geometric parameters of the sinusoidal paddles of a mixer with part of the motion indicators of low-altitude radial sectors of bulk material and the possibility of numerical simulation using existing characteristics. The effect of the flat and sinusoidal mixer blades of the blender, in terms of their construction, on the process of moving layers of the mixed material has been theoretically studied. The equations obtained allow us to state that, due to the difference in the geometry of the blades' surface, when the blades are flat, an inertial shock occurs when the blade contacts the material sector due to its sharp acceleration to the peripheral velocity. With sinusoidal blades, acceleration to a specified velocity is stretched in time, taking into account the amplitude of the sinusoid, reducing the energy cost of the friction of material layers. The obtained equations allow us to identify the relationship and numerically simulate the change in the main indicators of the material position in the blender.
Studying the design and operational parameters of the sieve module of the grain cleaning machine
Authors: Kharitonov M K , Gievsky A M , Orobinsky V I , Chernyshov A V , Baskakov I V 
Published: May 2020

Abstract
The purpose of the study is to improve the efficiency of sieve cleaning by justifying the kinematic mode of operation and a rational scheme for the distribution of sieves in mills, depending on their purpose. Raw combine heaps of winter wheat of the “Alaya Zarya” variety and barley of the “Priazovsky 9” variety were used as grain material. The conducted research allows us to justify the angles of inclination of the ear sieves, which should be located in the upper tier with an angle of inclination to the horizon of 7° and be equipped with lattice cloths with round holes (a diameter of 7.5 or 8.0 mm). The frequency of oscillation of the sieve mill must be selected in the range of 340-370 min-1, which provides the maximum completeness of the selection of feed fractions by sorting sieves. In one tier in length, preference should be given to the placement of three lattice cloths.
Optimization of parameters of ecological-meliorative product for preseed treatment of soil
Authors: Tarasenko B F , Oskin S V , Tsybulevskiy V V , Karpenko V D , Rudnev S G 
Published: May 2020

Abstract
It has been established that the imbalance of soil processes caused by insufficient intake of organic matter into the soil causes its degradation, decreased fertility, and humus content. There is a problem of ensuring environmental safety. It was also established that the development of new or the improvement of existing structural and technological solutions for tillage is of particular practical interest. Pre-sowing cultivation of the soil is a thorough closure and preservation of moisture through the creation of the upper mulched surface, the destruction of weeds and the creation of favorable conditions for seed germination at a biologically optimal depth of planting. For the steppe zone of the North Caucasus (Krasnodar Territory, Rostov Region and Stavropol Territory), which is the main grain-sowing zone in Russia, research is needed to develop innovative means for pre-sowing treatment that provides the accumulation and preservation of moisture and nutrients, reduces fuel consumption and stable movement of working bodies in soils having different densities. To solve this problem, the hypothesis was put forward at Kuban Agrarian University that in order to ensure moisture conservation and reduce energy consumption, stability of movement of the working bodies of the device in soils with different densities is required, while the stand must deviate under the influence of external resistance in three planes. The research was developed and protected by the patent “Device for presowing tillage”. Studies have been carried out to optimize the energy costs of an innovative tool for presowing tillage using experimental design methods that confirm effectiveness.
Influence of the droplet size on the uniformity of the distribution of protective material over the surface of agricultural machinery
Authors: Ushanev A I , Uspenskiy I A , Yukhin I A , Filyushin O V , Podyablonskiy A V 
Published: May 2020

Abstract
A decrease in the diameter of a droplet of a protective coating stream occurs in cases of a decrease in the diameter of the nozzle, an increase in the volumetric flow rate and the lower surface tension coefficient. To study the effect of droplet sizes on the quality of the protective coating, the conditions for obtaining droplets of different diameters were determined. During the experiment, it was found that the most significant parameters were those of the nozzle and the operating pressure of the installation. The change of these parameters caused the change of the size of the material droplets. To do this, replaceable nozzles with various diameters were installed and the supply pressure was also regulated.
Application of specialized software systems for determination of normal and emergency operation modes parameters of power distribution networks
Authors: Yastrebov S S , Os’kin S V , Yarosh V A , Bogatyrev N I , Ivashina A V 
Published: May 2020

Abstract
The paper analyzes the normal and emergency operation of rural distribution electric networks applying specialized software system - RASTRWIN PC, which is used at many power network enterprises in Russia. This specially designed program uses the RASTRWIN PC calculation core - Astra.dll, which calculates normal and emergency network conditions. It is used to solve the problem of calculating the modes of distribution networks 6-10 kV. To achieve greater accuracy of results, we use the scaling network parameters (currents, voltages, loads). For greater accuracy in calculating emergency conditions, the currents of the previous pre-emergency operation mode are used, as well as the dependence of the load current on the voltage in the network in emergency operation mode. The paper also substantiates the equivalent of the distribution network scheme based on a comparison of the calculation results of the modes for the full network section scheme and a simplified scheme. It is done to reduce labor costs when drawing up a design diagram of a distribution power network with a large number of taps on feeders. Using the developed program for a section of a distribution power network with the voltage 10 kV, normal and emergency operation modes of the network were calculated.
Features and Characteristics of the new NASA MicroPuLse NETwork (MPLNET) automatic rain detection algorithm
Authors: Lolli S. , Welton E. J. , Lewis J. R. , Campbell J. R. , Vivone G. 
Published: May 2020

Abstract
The water cycle strongly influences life on Earth. In particular, the precipitation modifies the atmospheric column thermodynamics through the process of evaporation and serves as a proxy for latent heat modulation. For this reason, a correct precipitation parameterization (especially low-intensity precipitation) at global scale, bedsides improving our understanding of the hydrological cycle, it is crucial to reduce the associated uncertainty of the global climate models to correctly forecast future scenarios, i.e. to apply fast mitigation strategies. In this study we developed an algorithm to automatically detect precipitation from lidar measurements obtained by the National and Aeronautics Space Administration (NASA) Micropulse lidar network (MPLNET) permanent observational site in Goddard. The algorithm, once full operational, will deliver in Near Real Time (latency 1.5h) a new rain mask product that will be publicly available on MPLNET website as part of the new Version 3 Level 1.5 data. The methodology, based on an image processing technique, can detect only light precipitation events (defined by intensity and duration) as the morphological filters used through the detection process are applied on the lidar volume depolarization ratio range corrected composite images, i.e. heavy rain events are unusable as the lidar signal is completely extinguished after few meters in the precipitation or no signal detected because of the water accumulated on the receiver optics.
Trends of Climate Variables and Aerosol optical Depth in Thailand
Authors: Pilahome O , Homchampa C , Kumharn W 
Published: May 2020

Abstract
This study analysed climate variables data in four stations over Thailand. Aerosol optical depth (AOD) obtained from Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) were also used to determine climatic trends in the areas under focus. The linear regression, Mann-Kendall trend, and Sen’s slope tests were applied. Rain (R) gave higher values in July to October for most regions except in the Songkhla. Amount of R increased in all regions. Rainy season is caused by the Southwest monsoon, which is a normal occurrence in Thailand from June to September. However, this monsoon tended to begin earlier and last longer (May to October) than expected. Mean temperature (Tmean) values were found to be significantly higher from March to May and increased in all stations. The highest significant increases of annual Tmean were found in the North. There was no significant trend in annual R (Rainfall) at the 1% and 5% significance level in all stations. The AOD values were likely to increase in almost all stations. The highest significant increase of annual AOD was observed in Ubon Ratchathani.
Deep Residual U-Net Based Lung Image Segmentation for Lung Disease Detection
Authors: Mique E , Malicdem A 
Published: May 2020

Abstract
The World Health Organization (WHO) estimated that by the year 2030, lung disorders such as Chronic Obstructive Pulmonary Disease (COPD) would be one of the leading cause of death all over the world. Consequently, accurate and timely detection of lung diseases may prevent further death. It is therefore vital that the early detection may lead to treatment and prevention of mortality among patients. However, there are only a minimum number of experts or well-trained radiologists reading Chest X-Ray (CXR) that delays the timely diagnosis of lung diseases. In order to aid the radiologist in reading CXR images, a computer-aided tool is proposed. Before the processing of images, it needs to be segmented to make it easier for the machine to understand. This study is focused on developing a model that will segment the lung from CXR images. Using Residual U-Net (ResUnet) architecture based semantic segmentation, the researchers were able to develop and train a model using a set of 562 CXR images and lung mask images, 70% of the images were used as training data and 30% as test data. The model was trained with 40 epochs and a batch size of 16. Dice coefficient was used to assess the similarity of the segmented result and the ground truth mask. The developed model has achieved a Dice coefficient of 0.9860. The developed model can then be used in classifying lung diseases by focusing on the segmented image rather than focusing on the entire CXR image.
LogIO: An Adaptive Gamification Learning Approach on Digital Logic Gates
Authors: Torio JO , Bigueras R T , Maligat D E , Arispe M A , Dela Cruz J S 
Published: May 2020

Abstract
The gamified e-learning approach has been widely used as a learning and teaching strategy, particularly in higher education. This strategy has been successfully used to engage, motivate and enhance learning performances. However, learners or students react differently to game designs and game mechanics depending on the subject area that a particular gamified application though there are several studies shows that gamification enhances motivation. In this paper, we designed and implemented a specific learning model for the gamified digital logic gates or LogIO. Thus, thirty (30) learners evaluated and we determined how do game design elements affect learners in terms of motivation, performance and learning experience. The main results of this study showed that learners agreed that the motivation level and usability of LogIO have a weighted mean of 4.56 and 4.49 respectively while performance and learning experience level has 81% during the utilization of the gamified mobile application. These results support the significance and relevance of adapting particular design elements for gamified digital logic gates to enhance motivation, performance and learning experience.
A Model of Computation-based Naming System for Musical Elements of Java Traditional Song
Authors: Syarif Arry Maulana , Azhari  , Suprapto  , Hastuti Khafiizh 
Published: May 2020

Abstract
In a research which involves mathematics and music, information of pitch, such as note, bars, melody line, beat, tempo, and others, was used as dataset to be processed by computer in generating or predicting musical objects. Helmholtz notation and scientific pitch notation used in western music are formal notation writing systems that have been applied in the computer science research as in the topics of algorithmic composition or music information retrieval. A Model of computation-based naming system for musical elements of Java traditional song called gendhing scientific pitch notation or GSPN was proposed to provide a method of information data recording of pitch in a term that can be read and write by human and computer. The method was conducted in two phases, which were Identification of musical elements and formulation of computation-based naming system. The model was successfully implemented in a simple computer program that has a task to read a data in GSPN format and to write by generating a music sheet based on the input data.
Design and Development of Data Warehouse Framework of Highland Vegetable Crops for Benguet
Authors: Quitaleg A R , Ortiz M G 
Published: May 2020

Abstract
The data warehousing technology has been widely used in organizations providing management, data integration and helps do the decision-making. Data warehouse offers an effective way for analysis and statistics to the big data in agriculture. Agriculture is one of the major issues in the Philippines and needs technological advancement. There is an increasing need for farmers and decisions makers in processing agricultural data. Agricultural datasets are diversified, non-standard and very large. It captures information about crops, farmers, buyers and other factors and requirements pertaining to the agricultural production. Designing a data warehouse for agricultural data is a great challenge for the researchers. The data warehousing technology has been widely used in organizations providing management, data integration and helps do the decision-making. Data warehouse offers an effective way for analysis and statistics to the big data in agriculture. Agriculture is one of the major issues in the Philippines and needs technological advancement. There is an increasing need for farmers and decisions makers in processing agricultural data. Agricultural datasets are diversified, non-standard and very large. It captures information about crops, farmers, buyers and other factors and requirements pertaining to the agricultural production. Designing a data warehouse for agricultural data is a great challenge for the researchers.
Design and Implementation Network Administrators Account Management System Based on Authentication, Authorization, and Accounting Based on TACACS and LDAP
Authors: Paramitha Ardelia Puri , Rochim Adian F. , Fauzi Adnan 
Published: May 2020

Abstract
Authentication is required for to authenticate user administrators for accessing network devices. In large-scale network devices management, firstly administrators need centralized user management to modify their account for logging network devices. Secondly, they must have log monitoring data who modified their account. The goal of this research is to develop and implement Authorization, Authentication, Accounting (AAA) system and making Log Monitoring System (LMS). Objectives of this research are implementing a system that can centralize and manage network administrators account. Design and topology of the network use simple star network. Software design uses Rapid Application Development (RAD) method. Research began with analyzing the research problem, next step is creating a system design, then build the system. After the system has been built, a demo is done whether the system is running well. If the system has not functioning as desired yet, refine the system. If already functioning as desired, a testing is done. If there are no obstacles during testing, the system is ready to be implemented by users who will use the system. The result shown that system is able to centralized authentication and authorization using Terminal Access Controller Access-Control System (TACACS), and processing accounting data into information in graphical form using ELK Stack. The result of the research is developing monitor user login and log review. The test result shown that system can manage network administrators account according to the Authentication, Authorization, Accounting (AAA) principle.