bluuebunny/crossref_metadata_2025_split huggingface dataset:
Short-Form video classification based on Gate shift module and Semantic embedding
Authors: Tao Jun , Han Lixin , Zhu Jun 
Published: September 2021

Abstract
Most of the existing video classification methods are based on large-scale data training, which can better realize the recognition and classification of known categories. However, data labelling is cumbersome and most things are unknown. Therefore, the existing video classification methods fall into a data bottleneck. This paper proposes a short video classification method based on GSM and semantic embedding. It uses super large-scale text information to assist the recognition process of the video classification model. This is an important development in the classification effect of knowledge categories. Specifically, this article expands the video classification method, adds category semantic embedding in the video feature extraction process, and trains to continuously fit the word vector of the corresponding category, and then uses semantic similarity to realize the classification of unknown categories. Multi-angle comparative experiments verify the effectiveness of this model, which can achieve good classification of unknown video categories.
A Review on Welding and Fatigue Behaviour of Titanium and Its Alloys
Authors: Kannan G.K. , Ramesh P. , Dhinakaran V. , Anandhraj R. 
Published: September 2021

Abstract
Titanium is metal element which comprises about 0.44% of earth’s crust. The abundance and reliable properties of this element made it essential in field of engineering works. Welding is a fabrication process which fuse the materials together. Welding of titanium and its alloys expands the applications of usage of titanium. The idea of this review, is to sum up the welding and fatigue behavior of titanium and its alloys. It has been identified that laser beam welding (LBW) is feasible for titanium and its alloys due to its flexibility, high heat capacity input and efficiency.
Micro-mechanics Study of Nano TiO2 High Friction Composite Material Using Pin on Disc Method
Authors: Kannan G K , Bernard S.Stephen , Ranjith L. , Jagadeep M.V. , Ganesh S.Jawahar , Santhosh S.Jawahar 
Published: September 2021

Abstract
This paper focuses with the analysis of friction and abrasion characteristics of Nano TiO2 composite using pin on disc method. Nano TiO2 with 10 ingredients was fabricated by employing compression moulding technique and also the composite tribology strength was weighd. The six composite specimens were prepared by varying Nano TiO2 (2, 4, 6, 8 and 10%) with other ingredients and the results are plotted. It indicates that the abrasion rate was decreased by adding Nano TiO2 upto 8%. Hardness and porosity are also found to increase but heat swell and specific gravity decreases. 6 wt% Nano TiO2 has the property to improve the friction stability during high speed and load. Abrasion tested composites was examined by scanning electron microscope indicating that abrasive, cavity and oxidation were the predominant abrasion mechanism. [Copyright information to be updated in production process]
Tensile and impact strength of alpaca fiber epoxy matrix hybrid composites prepared by injection moulding process
Authors: Vinoth N. , Rajkumar K. , Santhosh Kumar R. , Mohanavel V , Ravichandran M. , Sathish T. , Subbiah Ram 
Published: September 2021

Abstract
Today, there are many more applications for fibre reinforced polymer composites than there were for metals and alloys a few decades ago. Numerous research projects have focused on improving the mechanical and thermal properties of composite materials, especially when reinforced with environmentally friendly, recyclable, and biodegradable materials. This study combined alpaca fibre (AF), palm seed filler (PSF), and polypropylene (PP) to create composites that have improved properties over traditional polymer composites. Fiber loadings of 35, 30, 25, 20, 15, and 10 percent and filler loadings of 15, 10, and 5 percent were used to prepare the alpaca fiber/palm seed filler polypropylene (PP) composites using a conventional injection moulding technique (0, 5, 10, 15, 20 and 25 wt. percent ). Hydrophilicity and mechanical properties of the hybrid bio-composites were evaluated experimentally. The results showed that 15 lbs. For example, epoxy matrix composites have tensile and flexural strengths of 62 MPa, as well as hardness and impact strengths of 54 and 17.9 kJ/m2, respectively.
Strength of 3D prints with variable print orientation
Authors: Kishore R , Sivaraj S. , Dhinakaran V , Padma Pravin Prabhagar V.S , Jawhar Srinivas S 
Published: September 2021

Abstract
The purpose of this paper is to present the analysis of the efficiency and strength of 3D printed parts due to the variation shown in print orientation. Fused deposition modeling (FDM) is a widely used technique in which the melt extrusion method is used to deploy the thermal plastics as filaments in a specific pattern. In recent years, the revolutionary method has changed the field of rapid manufacturing. This has become one of the most common methods for printing polymer-based composite components. The investigation is done based on the print orientation effects on the macrostructure, the mechanical properties, and the strain field behavior of PLA (polylactic acid) filament. Based on the analysis, the properties of an object are optimized to increase mechanical strength when manufactured. By fixing the similar print properties across all different orientations helps to identify the differences in the structural and other mechanical properties, which projects a clear understanding of the impact received and thus provides a way to enhance the structural strength of the prints.
Topology optimization of an ATV wheel hub
Authors: Karthikeyan K , Kishore R , Jeeva K , Kumar Harin , Kannan R.S 
Published: September 2021

Abstract
The article is based on the Topology Optimization of an ATV Wheel Hub. So, we use this methodology to reduce the unwanted material of the All-Terrain Vehicle(ATV) Wheel HUB and to reduce the weight. ATV is mainly designed for a competition, where the Hub is used to connect the wheel to chassis via steering knuckles and arm linkages. Hub plays a vital role in the ATV. So, designing of hub should be in proper dimensions. The hub material is designed with a help of SOLIDWORKS. And it was analysed by SolidWorks simulation. The material used for a hub is Aluminium alloy 6063-T6.
Design of Buck Converter and PV Module for Solar Powered Sailing Boat
Authors: Ettappan M , Maheswaran G , Vimala V , Somasundaram K , Vishnupriyan J 
Published: September 2021

Abstract
The main intention of this work is to minimize the operating cost and increase the power generation of solar photovoltaic (PV) power-driven sailing boat with buck converter. The design of dc-dc converter for solar powered sailing boat is presented here. The entire PV source output power is taken and given to the solar boat through buck converter. The entire output power from the PV source which is given to the dc load is enough to drive a boat. The Buck converter model and solar PV module has been designed and simulated with the use of Matlab Simulink and compared with theoretical predictions.
Numerical simulation of the temperature distribution of elliptical cavity tube receivers in the parabolic trough solar collector
Authors: Cao Fei , Gu Xianzhe , Qiu Jialing , Yang Chunyuan , Zhu Tianyu 
Published: September 2021

Abstract
The elliptic cavity tube absorber is used in the parabolic trough solar collectors to increase the optical efficiency and decrease the thermal loss. But the non-uniform heat flux distribution on the tube receiver will cause non-uniform temperature distribution, thus leading to asymmetric thermal stress and deformation of the tube receiver. In this paper, the geometric as well as thermal parameters of the elliptical cavity tube receiver are analysed through numerical simulation. The temperature distribution of the tube receiver in the single-phase liquid zone, viz. the water zone and the vapour zone, is analysed. It is found from this study that there are two extreme temperature areas in the elliptical cavity tube receiver. When the major semi-axis of the elliptical cavity is 63mm, the maximum temperature of the water zone is the largest, which occurs at (-35mm, 0mm) of the tube receiver. When the major semi-axis of the elliptical cavity is 67mm, the maximum temperature appears at (-9mm, 0mm) in the vapour zone, and the minimum temperature rise appears at (-13.88mm, 0mm).
MOF derived carbon with ultra-high specific surface area and pore volume for lithium-ion capacitor cathodes
Authors: Yang Jian , Li Teng , Kashif Khan , Li Junxiang , Wu Mengqiang 
Published: September 2021

Abstract
Traditional supercapacitors have been studied extensively because of their high-power characters. However, their poor energy density severely limits its future applications. Different from the traditional supercapacitors, lithium-ion capacitors combine the high-power density of double-layer capacitors with the high energy density of lithium-ion batteries. In order to obtain the lithium-ion capacitors with such high performance, new electrode materials are inevitable. Herein, we use the metal-organic framework (MOF) technique to synthesize nano-sheets carbon-based materials with a large specific surface area and large pore volume. This new carbon-based material shows a very high specific capacity and long cycle life when being utilized in the cathode of lithium-ion capacitor. This method introduces a novel approach to the synthesis of high-specific surface activated carbon for lithium-ion capacitors.
Porous SiC Ceramics with Controllable Porosity Achieved by Micro-sized Powder through Recrystallization Sintering
Authors: Chen S , Chen C L , Huang Z L , Huang J S 
Published: September 2021

Abstract
Porous silicon carbide (SiC) ceramics with various porosity and pore size were successfully fabricated by adjusting the particle size and content of fine powder via recrystallization sintering process. The effects of the addition of fine powder with different particle size on the micromorphology of porous SiC ceramic and the flexural strength were investigated. With the increase of the fine powder content from 5wt% to 20 wt%, the porosity and pore size decrease, and the crystal grains gradually become larger and tend to round. The neck area among grains increases, leading to the improvement of flexural strength. The mechanism for promoting the sintering of porous SiC ceramics lies in the evaporation-condensation process of fine powder at high temperature. The finer particles are easier to be evaporated to promote the growth of coarse grain and the development of grain neck, so that the porosity and pore size were smaller, and the flexural strength was enhanced. At the addition of F4 powder of 20 wt%, the porous SiC ceramics with the porosity and MFP size of 39.1% and 1.38 μm respectively, and the flexural strength of 54.49MPa were obtained.
Ni-doped δ-MnO2 as a cathode for Zn-ion batteries
Authors: Gao Danmei , Zhu Tingting , Yu Li , Chen Peng , Li Chengjun , Liu Yuping 
Published: September 2021

Abstract
Among the cathode materials for zinc-ion batteries, manganese oxides have been extensively studied. Thermal decomposition method was adopted to synthesize the Ni-doped δ-MnO2 material, called as NixMn1-xO2. The electrochemical performance and energy storage mechanism of NixMn1-xO2 were studied in 2M ZnSO4 + 0.2M MnSO4 electrolyte. Nickel doping can significantly improve the electrochemical activity of δ-MnO2. Therefore, Ni-doped δ-MnO2 shows better electrochemical cycling performance than δ-MnO2. At 100 mA g−1, NixMn1-xO2 (x=0.2) the specific capacity of 280mAh g−1 in the second circle, and the corresponding voltage platform is 1.36V and 1.23 two discharge voltage platforms. After 100 cycles, the specific capacity of NixMn1-xO2 (x=0.2) still maintain 167 mAh g−1 at a current density of 100 mA g−1. In addition, we also proved that Zn2+ and H+ are co-intercalated into NixMn1-xO2 during the process of charge and discharge and the electrochemical reaction is highly reversible. This research broadens the thinking of exploring ZIBs cathode materials with good specific capacity and cycle performance.
Construction of hierarchical core-shell structured CoSe2@Fe3O4@Fe2O3 composite as advanced anodes for sodium ion batteries
Authors: Luo Shi , Chen Chenghao , Feng Ruojin , Chen Xuanjia , Chen Wenlin , Wu Zhangjie , Kong Xiangzhong 
Published: September 2021

Abstract
Transition metal selenides/oxides have received extensive attention, due to there suitable voltage plateaus and abundant reserves. However, intrinsic low electrons conductivity and huge volume change during sodiation/desodiation progress limit its wide application. To address these issues, CoSe2@Fe3O4@Fe2O3 with heterogeneous structure was successfully synthesized. As a SIBs anodes, the CoSe2@Fe3O4@Fe2O3 composite presents high electrochemical reversibility with a capacity of 360 mA h g−1 after 100 cycles at 100 mA g−1.
Distribution and Potential Ecological Risk Assessment of Four Light Rare Earth Elements in the Anning River Located in Sichuan Province, China
Authors: Wang X M , Hu J Z , Peng C , Wen W J , Ou H 
Published: September 2021

Abstract
In order to investigate the distribution of rare earth elements (REEs) in the Anning River, 48 surface water and 16 sediment samples were collected. The elements La, Ce, Pr and Nd were analyzed. Risk Quotient and Potential Ecological Risk index were used to assess the ecological risk in the Anning River. The results showed that total REEs concentrations (La, Ce, Pr, and Nd) varied from 1.43 μg/L to 24.30 μg/L in surface water, and from 74.86 mg/kg to 1542.16 mg/kg in sediments. Average RQ values displayed the order: Ce > La > Pr > Nd. The RQ values of all REEs exceeded 1 at 7 sites. In addition, the resulting RQ values for La were higher than 1 at 14 sites (87.50%). The average potential ecological risk of REEs in the Anning River indicated a high risk level (RI=44.40), mainly in sections S4-S6. The rare earth element Pr was the element that contributed the most to the Potential Ecological Risk index. Ecological risk should not be ignored. Thus, further studies are urgently required.
Mineralogical Study on the Consistency Property of Bentonite Mixed Soil
Authors: Okawara M , Saito Y , Ishiguro K , Hotta Y 
Published: September 2021

Abstract
Bentonite mixed soil, which is a mixture of bentonite with sand and gravel, can be easily compacted by adjusting the blending degree, and it is difficult for water to pass through and exhibits low permeability. It is widely used at construction sites because it can be mixed on-site and has good workability. Examples of its use include impermeable layers at waste disposal sites and measures to contain heavy metals from rocks generated from construction sites. The main component of bentonite is smectite, which is a swelling clay mineral, and the swelling property and consistency characteristics determine the engineering properties. In particular, low permeability is considered to be strongly influenced by the electrochemical properties at the crystal level peculiar to smectite. In this study, the mechanism of expression of engineering properties of bentonite mixed soil was investigated focusing on the mineralogy properties of smectite. Specifically, X-ray and near-infrared analysis were performed to clarify the crystal structure of smectite and the adsorptivity of water molecules. The change in interlayer distance were clarified by XRD. Information on the behavior of water molecules was obtained by NIR. From these analyses, we obtained information on the swelling, consistency and micro-physical properties of smectite, which is the main component of bentonite, related to water permeability.
Elution and Containment of Harmful Substances in Construction-Generated Soil: A Case Study of Oshikado Tunnel, Japan
Authors: Iwamoto Y , Shimizu Y , Morita S , Okawara M 
Published: September 2021

Abstract
In recent years, there has been an increasing number of cases in Japan where countermeasures against environmental pollution caused by natural heavy metals contained in soil and wastewater generated during construction work have become a problem. For example, when arsenic, which is often used, exceeds 0.01 mg/L, which is the criterion in the elution test, the generated soil is covered with low-permeability (permeability coefficient ≤1×10-6 cm/s) soil mixed with bentonite to prevent heavy metal leakage. Although the impact on the surrounding environment is predicted in the design of such a disposal site, it does not accurately reflect the behavior of leachate in the embankment and the elution characteristics of heavy metals. Therefore, in this study, for the purpose of optimal design of the disposal site, the distribution of heavy metals in the embankment, behavior of leachate, and elution amount of heavy metals were investigated, and a numerical analysis method using the advection-dispersion equation was examined. In addition, a large column test using soil at the site was conducted to reproduce the site. The parameters related to the permeation characteristics obtained from the column test agreed with the field test; however, the unit elution amount, which is a parameter related to the elution characteristics, was 7.5 times that of the field test. This result indicates the possibility of overestimating the elution amount of heavy metals in the test modeling of the disposal site.
Investigation of Penetration Process of Three Full-flow Penetrometers in Marine Soft Clay
Authors: Zhang H , Yang S F , Wang L 
Published: September 2021

AbstractThis study presents an experimental investigation of the penetration process in marine soft clay in the Shanghai coastal area using three types (non standard Ball (N), standard Ball(S) and T bar) of full-flow penetrometers. Three main factors (the penetration resistance, strength degradation, and strength factor) are evaluated and discussed in the comparative analysis of the penetration process. The results reveal that there is a model to predict the soil strength degradation in the range of low soil sensitivities (ST < 8). In particular, for the Ball(N) penetrometer, which is a non-standard penetrometer, the degradation process is more readily affected by the soil properties. For the Ball(S) and T bar penetrometers, the test results indicate a certain relationship between the soil sensitivity (ST) and the strength factors of undisturbed and remoulded soils with low sensitivity (ST < 8). however, this relationship is not observed with the Ball(N) penetrometer. These tests can enrich the application of conventional full-flow penetrometers in marine soft soils while facilitating the adaptation of non-standard penetrometers for in-situ tests in various soft soils.
Assessment of Heavy Metals in Mine Soil and Tailings from Jos, Nigeria
Authors: Olarinoye I O , Atipo M K , Awojoyogbe O B 
Published: September 2021

Abstract
Jos is a mining town in Nigeria; mining activities has been going on in the area for more than a 100 years. Although, the mining and other related activities have brought about economic, social growth and infrastructural development in the area. Unfortunately, mining activities has been linked to the enhance in the level of heavy metals in the soil and other geological formations in the environment. To ascertain the heavy metals (HM) burden in the soil due to tin mining activities at Rayfield-Du area of Jos, HM concentrations were evaluated in soil samples collected from the mine site. The HM concentrations in the soils were evaluated using the Energy Dispersive X-ray Florescence (EDXRF) spectrometer system. The analysis of eight HM (Cr, Co, Ni, Cu, Zn, As, Cd, and Pb) concentrations showed that they are above the Nigerian reference level except for Co and Ni. The pollution and ecological risk indices of the HM concentrations were classified as low for the mine soils.
The Ecological Variety Testing of Foreign Melon and Watermelon Hybrids in the Climatic Conditions of Southeastern Kazakhstan
Authors: Aitbayev T E , Mamyrbekov Zh Zh , Aitbaeva A T , Zorzhanov B D 
Published: September 2021

Abstract
The results of the ecological variety testing of melon and watermelon hybrids are presented in the paper. In the period from 2018 to 2020, 10 foreign varieties and hybrids of melon and watermelon were evaluated according to economic and valuable characteristics in the adaptation nursery in the climatic conditions of southeastern Kazakhstan. According to the set of qualities and indicators, 4 melon and watermelon varieties were distinguished and suggested for production.
Content of Coumarins in Various Organs of Sosnovsky’s Hogweed (Heracleum Sosnowski Mandena)
Authors: Andreeva L V 
Published: September 2021

Abstract
In alcohol extracts of dried shoots, leaves, stems, and seeds of Heracleum sosnowski Mandena collected at different periods of plant growth, the content of coumarins was determined by spectrophotometry. The highest content of coumarins was revealed in seeds. Young shoots contain the least amount of coumarins. The author concludes that for effective use of Heracleum sosnowski Mandena as a source of coumarins it is most beneficial to use its seeds. Consequently, the plant must follow a complete development period. The control of the spread of Heracleum sosnowski Mandena is aimed at destroying the plants before seeds are ripe. Mechanical and chemical methods are intended to destroy plant shoots. Therefore it seems impossible to combine the control of hogweed and the processes of extracting coumarins from it. Special areas are required for hogweed to grow in order to obtain coumarins from it. It is also necessary to provide for strict measures to keep the plant within the territory intended for it. Special requirements are imposed on ecological factors of the territory.
On Demographic Processes and Prospects for Development of Rural Areas of the Novgorod Region
Authors: Avdeev E A 
Published: September 2021

AbstractIn rural areas in the North-West of Russia, including those in the Novgorod region, there is a negative trend of reduction of permanent residents, especially of working age. Using the example of the Novorakhinsky rural settlement of the Krestetsky municipal district, a study was carried out of the dynamics of the number of residential buildings and their residents, including school-age children, over the past 123 years. A sharp decrease in these indicators was found in almost all rural settlements, some of them were depopulated and eliminated, which is confirmed by statistical data. A significant decrease in the population in villages led to the closure of kindergartens, schools, institutions of health care, trade and culture. The authors attempted to identify some of the reasons for these demographic changes. Rural population was alienated from forest resources, problems arose with the provision of firewood. At the legislative level it is proposed to allocate local forests near rural settlements to villagers and preferentially provide them with timber and other forest products. It is necessary to use the historical experience of the 19th-20th centuries and developments of modern scientists. To interest the local bodies of self-government, it is necessary to include into the assessment of their work and remuneration the following indicators: the dynamics of the number of permanent rural residents, construction and repair of residential housing, improvement of the territories of rural settlements, including high-quality water supply, heating, marketing of agricultural and forest products, and other vitally important conditions.