bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of Smart Card Media for Elementary Students
Authors: Audia Cita , Yatri Ika , Aslam  , Mawani Sri , Zulherman  
Published: February 2021

Abstract
Learning medium is a means of communication to ease the transfer of messages during the learning process. Continuous innovation in the learning process shall be conducted to increase the quality of education. This research and development form of research aims to develop the Smart Card media on conservation of living beings subject and know the smart card media qualification on conservation of living beings subject for 4th-grade elementary students. The development of the smart card uses the ADDIE development model, which involves five stages that includes Analysis, Design, Development, Implementation, and Evaluation. The data is collected by distributing questionnaires of the Likert scale with the range from 1 to 5. The analysis technique of this research uses quantitative data analysis and qualitative data analysis. The result of validating the smart card qualifications by material experts, media experts, teachers, and participants shows that the smart card’s use in the conservation of living beings subject is qualified to be used for 4th-grade students of elementary school as an alternative learning media.
The Use of the Powtoon Application in Learning Videos for Elementary School Students
Authors: Pratiwi Melly Siska , Zulherman  , Amirullah Gufron 
Published: February 2021

Abstract
One of the learning media that needs to be developed is the powtoon application-based learning media. This basic concept puts the idea of the teaching and learning process using animated videos. The purpose of this research is to determine the results of the powtoon application-based learning process in science lessons about energy, in fourth grade elementary schools. The use of this media is very effective during these times because when the researcher began her research about the usage of this media, home learning was being carried out due to Coronavirus outbreak (Covid-19), so the teaching and learning process was carried out using the internet. The research method used survey method of research, using the ADDIE development model. The learning media test was carried out by 3 media experts, 3 subject experts and 3 teachers from different schools. The product trials were conducted by 79 students from three different schools. The data was collected using the Likert scale with a range of score from 1 to 5. The results of this research show that the powtoon application-based learning media is very good for teaching and learning in schools about energy in elementary schools, because the Powtoon application is able to develop students’ imagination and common sense in learning thus increasing their learning achievement. Further research by combining learning strategies during the pandemic through online learning.
Examining Resource Based Learning and Individual Learning Capabilities in Todays’ Scenario
Authors: Sadasivan Usha , Balachander Bhuvaneswari , Vijayalakshmi S. 
Published: February 2021

Abstract
The immense use of web based resources is an undeniable truth in today’s learning scenario. Resource-based learning has gained momentum in leaps and bounds. Resource-based learning aids in the academic and holistic development of students by taking into account their capabilities, their styles of learning and their needs. RBL empowers the student to analyze and organize digital material. It also enables the learner to develop critical thinking skills and gives them the confidence to sift from the plethora of information available, the skill to ferret out what they need and what is needed for them. This skill will go a long way in empowering them to utilize the varied resources that is available on hand in various forms be it print or electronic. Such training in thinking will help them to approach any topic in a number of learning styles. The authors of this research paper, have attempted to understand the impact of resource based learning on teachers, keeping in view Gagne’s (1985) theory of levels of learning. Teachers from traditional background of teaching methods involving classroom interface, were approached and their views on the new methods popularized by RBL were obtained by means of a self-administered online questionnaire. The objective of the study was to analyze the attitudinal responses of the teachers towards RBL and whether they viewed it as a beneficial exercise for students as against traditional methods of learning.
Application of Learning Using Online Media During the New Normal
Authors: Jasiah  , Rakhman Arif , Arifin Ardian , Safitri Riana , Perdana Indra , Khaidir Abdul Wahab M. 
Published: February 2021

AbstractThe purpose of this research is to be able to know the implementation of learning during the New Normal period, the readiness of educators in carrying out learning activities and to find out how distance learning activities are carried out in middle schools and colleges, especially whether this learning can be achieved or not. In order to obtain the desired data, this study uses a survey method. The data that has been received will be carried out by quantitative descriptive analysis. In this study, primary data types were taken by taking individual or respondent responses as many as 121 respondents from West Kalimantan Province, both from private and public schools or colleges. The results of this research are the provision of learning materials using online learning media that have been carried out by educators showing various kinds of obstacles used by educators and the use of social media is the most widely used as well as presentation-based learning media and Youtube videos. The achievement of learning outcomes in online learning in the New Normal Era was not significant because there were still challenges faced by educators.
Eating healthy or wasting less? Reducing resource footprints of food consumption
Authors: Helander Hanna , Bruckner Martin , Leipold Sina , Petit-Boix Anna , Bringezu Stefan 
Published: February 2021

Abstract
To feed future populations on ever-scarcer natural resources, policy initiatives aim to decrease resource footprints of food consumption. While adopting healthier diets has shown great potential to reduce footprints, current political initiatives primarily address strategies to reduce food waste, with the target of halving food waste at retail and consumption levels by 2030. Using Germany as a case study, we compare the resource-saving potential of this political target with three scenarios of nutritionally viable, plant-based dietary patterns and investigate interactions and trade-offs. By using the Food and Agriculture Biomass Input–Output model, we capture biomass, cropland, and blue water footprints of global supply chains. The results show that dietary changes are particularly effective in reducing biomass and cropland footprints, showing a decrease of up to 61% and 48%, respectively, whereas halving food waste decreases biomass and cropland footprints by 11% and 15%, respectively. For blue water savings, halving food waste is more effective: water use decreases by 14% compared to an increase of 6% for dietary change with the highest water consumption. Subsequently, a combination of the scenarios shows the highest total reduction potential. However, our findings reveal that despite reduced footprints, a dietary shift can lead to an increased amount of food waste due to the rising consumption of products associated with higher food waste shares. Therefore, policy strategies addressing both targets might be contradicting. We conclude that international and national policies can be most effective in achieving higher resource efficiency by exploiting the reduction potentials of all available strategies while simultaneously considering strategy interactions.
Characterising port-based teleportation as universal simulator of qubit channels
Authors: Pereira Jason , Banchi Leonardo , Pirandola Stefano 
Published: February 2021

Abstract
Port-based teleportation (PBT) is a teleportation protocol that employs a number of Bell pairs and a joint measurement to enact an approximate input-output identity channel. Replacing the Bell pairs with a different multi-qubit resource state changes the enacted channel and allows the PBT protocol to simulate qubit channels beyond the identity. The channel resulting from PBT using a general resource state is consequently of interest. In this work, we fully characterise the Choi matrix of the qubit channel simulated by the PBT protocol in terms of its resource state. We also characterise the PBT protocol itself, by finding a description of the map from the resource state to the Choi matrix of the channel that is simulated by using that resource state. Finally, we exploit our expressions to show improved simulations of the amplitude damping channel by means of PBT with a finite number of ports.
Assessment of the risk of poisoning by combustion products from domestic gas-fired appliance using CFD modeling
Authors: Czerski G , Śpiewak K 
Published: February 2021

Abstract
Gas-fired appliances, including water heaters, are widely used in households and may have a significant impact on their gas atmosphere, i.e. reduction of oxygen concentration and appearance of toxic oxides (especially CO). Therefore, the paper deals with the assessment of the risks of poisoning by combustion products from a gas appliance using CFD modeling. A three-dimensional numerical CFD (Computational Fluid Dynamics) model of a real apartment was developed, in which the gas-fired instantaneous water heater with a standard power of 20 kW works in the bathroom. The model enabled the performance of transient simulation calculations for various air inflows (ventilation) to the abovementioned apartment (30 - 120 m3/h) as well as for various concentrations of carbon monoxide in combustion gases (0.1 - 1%). It was assumed that combustion gases inflow entirely into the room for 10 minutes. Based on the calculations performed, it was shown that the main threat occurs in the room where gas-fired water heater is located, i.e. in the bathroom. Moreover, changes in concentration of carbon monoxide and oxygen over time, and depending on the room height, were analysed. In addition, an analysis of the impact of combustion gases inflow on the temperature in the bathroom and the whole apartment was made.
Polluted Landfill adaptation into agricultural soil: heavy metal phytoremediation with Indian Black Mustard (Brassica Nigra) and Dolomitic Lime Fertilizer.
Authors: HariharaSudhan C , Anuradha B , Jayadevsivani S , Gokul K 
Published: February 2021

Abstract
Bio-medical and electronic waste accumulation from industry and anthropogenic sources is deposited at landfill sites over the years, possessing waste degradation into heavy metal deposition in soil such as Cd, Ni, Pb, which is detrimental to the developing embryo development and affects respiratory function. The hyper-accumulator herb, such as Indian mustard ( Brassica Nigra), which was able to absorb heavy metals from the soil and water and wipe out soil after a period of time and disposed of it. Dolomitic Lime Fertilizer is a Inorganic compound derived from mixture of calcium carbonate (caco3) and magnesium carbonate (mgco3) are used for the sustained agriculture. The Extraction of heavy metals along with Dolomitic lime helps to increase the nitrogen fixation rate in soil and reduce the acidity nature of the soil also acts as a soil conditioners. They provide eco-friendly, cheap and renewable resource for the subsequent years. Phytoremediation of contaminated sites is requires low cost and more renewable compared to remediation strategies that involve removing polluted soil constituents.
Experimental Investigation of Recycled Coarse Aggregates on Partial Replacement of Cement with Silica Fume
Authors: Manivel S , Pannirselvam N , Rajprasad J , Hemanarayanan T.S. 
Published: February 2021

Abstract
Coarse aggregate utilized majorly in concrete to reach the ultimate quantity in larger proportion. The structural and non-structural elements in the construction utilize majorly the concrete. Due to the mass availability of concrete during the demolition process and hence absorbing the same material to replace the coarse aggregate with recycled aggregate is the emerging field and it is sustainable. The experimental work involving the replacement of coarse aggregates with recycled aggregates and cement with silica fumes to improve the properties of concrete and eliminate the difficulties in construction field paves way for the further researches. The experimental study concentrates in the strength properties of the concrete with recycled aggregates and silica fume and compared with the conventional concrete.
Study of Fibre Reinforced Concrete Using Sustainable Materials
Authors: Uma Maguesvari M , Muthaiyan P , Yugasini S , Ammaiappan M 
Published: February 2021

Abstract
Our current generation is a pillar of this developing world in construction field, which also leads to decrease in natural raw materials and increase in production of many industrial waste materials creating an impact to living life through flaming and landfilling. Concrete is one of high production material in our daily life and have most probable way to substitute the waste materials. In this present work waste material are used for replacement of materials in developing the fibre reinforced concrete. Workable and mechanical characteristics of fibre reinforced concrete have assessed by substitution of coarse aggregate with recycled aggregate at(0%,10%,20%,30%, and 40%), and fine aggregate as M- sand, waste foundry sand and bottom ash and binder is replaced with silica fume 7% in addition to that fibre content as 0%,0.5%,1% and 1.5% of micro steel fibre and Basalt Fibre by weight of cement. Workability decreases with rise in incorporation of recycled aggregate and also it diminishes workability with the inclusion of fibres. The concrete mixture with replacement of coarse aggregate including micro steel and basalt fibre content have exhibited higher mechanical strength.
Experimental Study On Partially Replaced Concrete With Automobile Industries Wastes
Authors: Kalpana Ms.M. , Sudharson Mr.G. 
Published: February 2021

Abstract
In recent days, the major threat to our environment is waste management. As a contribution to save our environment many research works are happening to utilize waste in their manufacturing process to reduce waste as well as reducing the cost involved in the process. Waste utilization will partially help us to protect our environment. In this paper, for manufacturing concrete with partially replaced fine aggregate is experimented. The objective is to reuse the locally available polypropylene fibre generated as waste by automobile industries. The adhesion between polypropylene fibre and cement matrix is considered as an important factor. To give proper matrix between the fibre and cement, shredded polypropylene fibre is used as partially replaced fine aggregate. The replacement percentages used are 20%, 40% and 60%. The specimens were prepared with water cement ratio 0.5 and tested after 7days and 24 days of curing period. The influences of polypropylene fibre in concrete in fresh and hardened state are compared with conventional concrete properties. The results obtained shows increase in the strength and workability property for 20% replacement of polypropylene fibre as fine aggregate in concrete. Hence the disposal of polypropylene waste from automobile industry can effectively be used in shredded form as partial replacement of fine aggregate in concrete.
A multibody model of a wheel loader with pneumatic boom suspension and proving ground testing
Authors: Pavlov N L , Dacova D I 
Published: February 2021

Abstract
In this paper a multibody dynamic model of a wheeled tractor-front-end loader system with pneumatic boom suspension is created. A front-end loader was designed and manufactured to validate the dynamic model and to conduct proving ground tests. Comparisons of some simulation results with the measured data revealed that the proposed dynamics model can well describe the vibrations of the tested compact wheel loader. In addition, the results of tests for RMS acceleration and spectral densities at different speeds are presented.
Solutions for increasing the comfort in road vehicles based on improving the construction of the seats
Authors: Pavlov N L , Dacova D I 
Published: February 2021

Abstract
To reduce the harmful vibrations to which passengers and drivers are exposed when traveling in road vehicles, various suspension systems for the vehicle, chassis or seats may be used. Most research and development is focused on reducing vertical vibrations. When the vehicle is cornering, lateral acceleration occurs, which causes discomfort to passengers. According to a number of studies, the value of lateral acceleration can be reduced if the vehicle or seats lean towards the center of the turn. This study looks at some solutions to increase comfort in road vehicles based on improving the design of the seats. New design solutions for a child tilting seat, which were developed by the authors, are presented. Road experiments have been carried out to demonstrate that the use of these seats when the vehicle is cornering can reduce the value of lateral acceleration.
NDVI, chlorophyll and carotenoids content of leaves of Rosa damascena Mill under organic and conventional farming
Authors: Todorova M , Petkova N , Grozeva N , Gerdzhikova M , Lazarova S , Lozanova L , Mladenov A 
Published: February 2021

Abstract
The aim of our study was to compare NDVI index, total nitrogen, chlorophyll and carotenoids content of leaves of oil-bearing roses cultivated under organic and conventional agricultural systems in order to find impact of farm management on the physiology status of Rosa damascena leaves. The experiment was conducted on six private arable areas with Rosa damascena Mill in Rose valley, Southern Bulgaria. The selected study area size was 5000 m2 from each private territory. Three of the oil-bearing rose plantations are certified as organic farming and have been applied an organic agriculture system and the rest of them are characterized as conventional farming. NDVI index of the leaves of Rosa damascena was measured with Plant Pen 310 device in the field. The same leaves were picked up for future laboratory analysis. The total chlorophyll and carotenoids, μg/g dw content of leaves in the 80 % acetone were determined, total nitrogen by Kjeldahl method as well. Linear discriminant analysis (LDA) was performed to classify Rosa damascena leaves on the base of NDVI and photosynthetic pigment content according to relevant farm management. The results from conventional rose bushes leaves contained statistically proven higher total chlorophyll and lower total carotenoids than leaves belonging to organic oil-bearing roses cultivation. It is worthwhile to continue investigations with NDVI leaves measurements as a promising tool for recognition organic or conventional farm production.
3D printing on warp-knitted fabrics
Authors: Ayvali M , Bussieweke L , Druzinin G , Korkmaz M , Ehrmann A 
Published: February 2021

Abstract
While 3D printing was in former times mostly used for rapid prototyping, nowadays it is also used for rapid manufacturing. To overcome the problems of relatively low production speed and in several cases insufficient mechanical properties of 3D printed objects, 3D printing can be combined with larger-scale production processes, e.g. by directly printing on textile fabrics. To combine the advantages of both materials, e.g. tensile strength of a woven fabric with stiffness of an imprinted layer, the adhesion between both partners under mechanical load has to be investigated. Here, we use tensile tests to examine maximum forces, elongation at break, wearing out of the composites and the adhesion under maximized or repeated tensile stress to examine the applicability of such composites for sports shoes etc.
Method of optimization of geometric transformations of design surfaces of a man’s jacket
Authors: Slavinska A L , Mytsa V V , Syrotenko O P , Dombrovska O M 
Published: February 2021

Abstract
The article considers the mechanism of combining 3D and 2D-design methods based on the combination of modules of 3D-digital modification of the morphological structure of the body and 2D-generation of sweep details of the jacket. The mechanism of formation of the integrated design system for transformation of a surface of a body into silhouette designs on the basis of geometrical modeling has been offered. The selection of optimal divisions of the mannequin surface on the basis of identification of zones of stable deformations of the grid with regular topology is theoretically substantiated. Has been shown that the maximum compression deformation in the range of overall dimensions characterizes the parametric levels of darts in the product design. The affine transformations by the operation “shift” of the mannequin surface scan into three basic silhouettes of the jacket design were experimentally investigated. Parametrical transformation of silhouette designs have been realized by schemes of designs and the reference book of standard movements. Homogeneity of details’ construction of the sketch project of interchangeable models system has been estimated by coefficients of constructive homogeneity of silhouette designs and technological homogeneity of model functional knots. The algorithm of formation of the integrated design system of 3D and 2D-design is developed and its practical application on an example of the development of a series of interchangeable models of a jacket is shown.
A study on pattern making of sleeves with curved shoulders
Authors: Kazlacheva Zlatina , Radieva Krasimira 
Published: February 2021

Abstract
The paper presents a study on pattern making of a constructional base for designing of sleeves with rounded shoulders for ladies’ dresses and jackets: kimono, raglan, semi raglan and sloped shoulders ones. The developed constructional model gives possibilities of facilitating and correct pattern making of a base of design of ladies’ dresses and jackets sleeves with curved shoulders: kimono, raglan, semi raglan and sloped shoulders ones. The use of obtained dependence between additional height in the rounded shoulders and the additional height in the armhole makes the geometrical sequence of pattern making easier. A similar study can be made for ladies’ outerwear.
Research on the relation between the percentage of elastomeric threads in the yarn and the stretch of punto di roma jersey
Authors: Peneva Tania P , Balabanova Diana R , Dolapchieva Galia G , Krastev Krasimir 
Published: February 2021

Abstract
The last few years have shown a tendency for an increase in the production of knitting fabrics made of yarns containing elastomeric threads. A main point of the construction of such garments is the determination of their deformation properties, which change depending on the type of the knit and the composition of the yarn. Determining these properties requires textile testing which takes time and requires additional expenditures which necessitates the development of new methods for their evaluation. The aim of this work is to examine the relation between the distortion features of elastic knit fabrics and the percentage of elastomeric threads in the yarn. The subject of the study is a group of knit fabrics with the Punto di Roma stitch structure containing elastomeric threads from 2% to 6%. Based on the proven statistical significance of the correlation coefficients, a regression analysis was performed. A mathematical model of the studied dependence is presented, regression equations are derived. The analysis of the model proved that it works. The results obtained from the study aim to optimize a method for constructing a garment from a knitted fabric containing elastomeric threads.