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Relevant bibliographies by topics / Analysis of natural materials

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Academic literature on the topic 'Analysis of natural materials'

Author: Grafiati

Published: 10 March 2023

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Journal articles on the topic "Analysis of natural materials"

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Ramakrishna, Ganga, P. Kiran babu, K. Purushothaman, E. R. Sivakumar, and M. Sreenivasan. "An analysis on natural fiber composite materials." Materials Today: Proceedings 45 (2021): 6794–99. http://dx.doi.org/10.1016/j.matpr.2020.12.767.

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Vandenabeele, Peter, Mayahuel Ortega-Avilès, Dolores Tenorio Castilleros, and Luc Moens. "Raman spectroscopic analysis of Mexican natural artists’ materials." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 68, no. 4 (December 2007): 1085–88. http://dx.doi.org/10.1016/j.saa.2007.01.031.

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Bashorov, Musa, Georgiy Kozlov, Gennady Zaikov, and Abdulakh Mikitaev. "Polymers as Natural Nanocomposites. 2. The Comparative Analysis of Reinforcement Mechanisms." Chemistry & Chemical Technology 3, no. 3 (September 15, 2009): 183–85. http://dx.doi.org/10.23939/chcht03.03.183.

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The complete similarity of reinforcement degree behaviour has been shown for nanocomposite epoxy polymer/Na+-montmorillonite and polyarylate, which is considered as the natural nanocomposite. The polyarylate structure description is given within the framework of cluster model of polymers amorphous state structure. The interfacial adhesion level influences strongly the reinforcement degree of indicated materials.

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Gualtieri, A. F., A. Viani, G. Banchio, and Gilberto Artioli. "Quantitative Phase Analysis of Natural Raw Materials Containing Montmorillonite." Materials Science Forum 378-381 (October 2001): 702–9. http://dx.doi.org/10.4028/www.scientific.net/msf.378-381.702.

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Loukidis, Andronikos, Ermioni D. Pasiou, Nicholas V. Sarlis, and Dimos Triantis. "Fracture analysis of typical construction materials in natural time." Physica A: Statistical Mechanics and its Applications 547 (June 2020): 123831. http://dx.doi.org/10.1016/j.physa.2019.123831.

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Oliveira, Leandro S., Mauri Fortes, and Kamyar Haghighi. "CONJUGATE ANALYSIS OF NATURAL CONVECTIVE DRYING OF BIOLOGICAL MATERIALS." Drying Technology 12, no. 5 (January 1994): 1167–90. http://dx.doi.org/10.1080/07373939408960994.

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J, Okerio. "Comparative DMA Analysis of a Natural Based Potential Adhesive Extracts from Caesalipinia Decapelata." Physical Science & Biophysics Journal 6, no. 2 (July 5, 2022): 1–3. http://dx.doi.org/10.23880/psbj-16000214.

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Adhesives have for long been developed from plant and animal materials. This includes animal proteins like casein and plant materials such as starches and dextrin’s which form precursors to synthetic adhesives. In this work, the mechanical properties of the extracted, isolated pod latex/adhesive samples of the Caesalipinia decapelata species were investigated using the Dynamic Mechanical Analysis (DMA) to study cure behavior of the adhesive observed on application of stress over a range of temperatures. The cure properties of this natural adhesive were compared to commercially available adhesives.

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Morante-Carballo, Fernando, Néstor Montalván-Burbano, Paúl Carrión-Mero, and Kelly Jácome-Francis. "Worldwide Research Analysis on Natural Zeolites as Environmental Remediation Materials." Sustainability 13, no. 11 (June 4, 2021): 6378. http://dx.doi.org/10.3390/su13116378.

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Society faces a significant problem in regards to the spread of harmful products in the environment, primarily caused by accelerated growth and resource consumption. Consequently, there is a need for materials to be processed in less harmful ways and to remedy the contaminated sources they generate. Microporous materials have been studied for a long time and are used in waste treatment alternatives. Natural zeolites, on which this study is based, are attractive to the scientific and technological communities, due to their numerous applications as decontaminants and adsorption properties. This study analyzes the intellectual structures of publications related to natural zeolites in environmental remediation, using bibliometric methods to determine their volumes and trends. The methodology comprises of an analysis based on 1582 articles, using VOSviewer software, with data from 1974 to 2020, via the Scopus database. Results reflect a notable increase in publications from the end of the 1990s; the greatest contribution in the area comes from Eurasian countries. The study considers that development in this line of research will continue to increase and serve as a great contribution to preserve the environment in coming years, with themes that focus on water treatment (e.g., drinking water, wastewater, greywater), removal of heavy metals, ammonium, ammonia, and construction.

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Lakshmanan, D., R. Naveen, P. Saravanan, D. Nivitha, and R. R. Mathi Vathana. "Experimental Analysis on Water Absorption Behaviour of Natural Composite Materials." IOP Conference Series: Materials Science and Engineering 995 (December 15, 2020): 012045. http://dx.doi.org/10.1088/1757-899x/995/1/012045.

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Florea, Iacob, and Daniela Lucia Manea. "Analysis of Thermal Insulation Building Materials Based on Natural Fibers." Procedia Manufacturing 32 (2019): 230–35. http://dx.doi.org/10.1016/j.promfg.2019.02.207.

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Dissertations / Theses on the topic "Analysis of natural materials"

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Kopec, Grant Michael. "Examining natural resource futures with material flow analysis." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709409.

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Hassel, Beatriz Ivón. "ANALYSIS OF NATURAL MATERIALS AND STRUCTURES BY NON-CONTACT STRAIN MEASUREMENT METHODS." Kyoto University, 2010. http://hdl.handle.net/2433/120467.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第15424号
農博第1809号
新制||農||979(附属図書館)
学位論文||H22||N4523(農学部図書室)
27902
京都大学大学院農学研究科森林科学専攻
(主査)教授小松幸平, 教授中野隆人, 教授矢野浩之
学位規則第4条第1項該当

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Guan, Juan. "Investigations on natural silks using dynamic mechanical thermal analysis (DMTA)." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:c16d816c-84e3-4186-8d6d-45071b9a7067.

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This thesis examines the dynamic mechanical properties of natural silk fibres, mainly from silkworm species Bombyx mori (B. mori) and spider species Nephila edulis, using dynamic mechanical thermal analysis, DMTA. The aim is not only to provide novel data on mechanical properties of silk, but also to relate these properties to the structure and morphology of silk. A systematic approach is adopted to evaluate the effect of the three principal factors of stress, temperature and hydration on the properties and structure of silk. The methods developed in this work are then used to examine commercially important aspects of the ‘quality’ of silk. I show that the dynamic storage modulus of silks increases with loading stress in the deformation through yield to failure, whereas the conventional engineering tensile modulus decreases significantly post-yield. Analyses of the effects of temperature and thermal history show a number of important effects: (1) the loss peak at -60 °C is found to be associated the protein-water glass transition; (2) the increase in the dynamic storage modulus of native silks between temperature +25 and 100 °C is due simply to water loss; (3) a number of discrete loss peaks from +150 to +220°C are observed and attributed to the glass transition of different states of disordered structure with different intermolecular hydrogen bonding. Excess environmental humidity results in a lower effective glass transition temperature (Tg) for disordered silk fractions. Also, humidity-dynamic mechanical analysis on Nephila edulis spider dragline silks has shown that the glass transition induces a partial supercontraction, called Tg contraction. This new finding leads to the conclusion of two independent mechanisms for supercontraction in spider dragline silks. Study of three commercial B. mori cocoon silk grades and a variety of processed silks or artificial silks shows that lower grade and poorly processed silks display lower Tg values, and often have a greater loss tangent at Tg due to increased disorder. This suggests that processing contributes significantly to the differences in the structural order among natural or unnatural silks. More importantly, dynamic mechanical thermal analysis is proposed to be a potential tool for quality evaluation and control in silk production and processing. In summary, I demonstrate that DMTA is a valuable analytical tool for understanding the structure and properties of silk, and use a systematic approach to understand quantitatively the important mechanical properties of silk in terms of a generic structural framework in silk proteins.

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Ellis, Marguerite. "Investigation of Multiwalled Carbon Nanofiber - Graphite Layer Composites and Analysis of Natural Chalks." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/205417.

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The first part of this dissertation focuses on self-assembled composites. Self-assembled composites composed of vertically aligned multiwalled carbon nanofibers (VA-MWCNF) combined with a graphitic layer (GL) arranged perpendicular to MWCNF axes‘ have been produced at low temperature (445 °C) using low pressure thermal chemical vapor deposition (LPCVD). Electron microscopy and Raman spectroscopy were used to analyze composite morphology, structure and quality. It is found that different composite morphologies and modification of the GL structure can be obtained by varying the nickel (Ni) catalyst underlayer materials, the catalyst pre-treatment method, the gas recipe, the gas flow rates and the pressure conditions of the LPCVD process. Pre-treatment of the catalyst with H2 plasma or NH₃ gas was also investigated. It is found that even a short, one minute H2 plasma pre-treatment of the catalyst results in a significant break-down of the VA-MWCNF/GL composite structure. On the other hand, a one or ten minute catalyst pre-treatment with NH₃ gas results in a structural modification of the GL but retains the VA-MWCNF/GL composite structure. An increase in time of NH₃ gas pre-treatment leads to reduced VA-MWCNF/GL composite height. A growth mechanism for VA-MWCNF/GL composites was proposed. The focus, of the second part of this dissertation, is on the analysis of natural chalks used in traditional old master drawings. Scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) analysis were performed on bulk samples of natural black chalk, steatite and calcite natural white chalks and on samples of these chalks applied to paper using various techniques. Critical information was obtained about the morphology and sub-micron features of the chalk particles, the chalk/paper interaction of each application technique and elemental composition of the bulk chalk samples. It was found that the particle size and morphology of the natural white chalks reduced their ability to hold to the paper. This information provides insight as to why black chalk is more resistant to abrasion than the natural white chalks which is important for the conservation of extant chalk drawings.

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Scotter, Michael Joseph. "Aspects of the chemistry and analysis of the food colouring materials annatto and curcumin." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327600.

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Fernandes, Fábio António Oliveira. "Biomechanical analysis of helmeted head impacts: novel materials and geometries." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/21227.

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Doutoramento em Engenharia Mecânica
A cortiça é um material celular natural capaz de suster quantidades consideráveis de energia. Estas características tornam este material ideal para determinadas aplicações como a proteção de impactos. Considerando equipamentos de segurança passiva pessoal, os materiais sintéticos são hoje em dia os mais utilizados, em particular o poliestireno expandido. Este também é capaz de absorver razoáveis quantidades de energia via deformação permanentemente. Por outro lado, a cortiça além de ser um material natural, é capaz de recuperar grande parte da sua forma após deformada, uma característica desejada em aplicações com multi-impacto. Neste trabalho é efetuada uma avaliação da aplicabilidade da cortiça em equipamentos de segurança pessoal, especificamente capacetes. Vários tipos de cortiça aglomerada foram caracterizados experimentalmente. Impactos foram simulados numericamente para avaliar a validade dos modelos constitutivos e as propriedades utilizadas para simular o comportamento da cortiça. Capacetes foram selecionados como caso de estudo, dado as energias de impacto e repetibilidade de impactos a que estes podem ser sujeitos. Para avaliar os capacetes de um ponto de vista biomecânico, um modelo de cabeça humana em elementos finitos foi desenvolvido. Este foi validado de acordo com testes em cadáveres existentes na literatura. Dois modelos de capacete foram modelados. Um modelo de um capacete rodoviário feito de materiais sintéticos, o qual se encontra disponível no mercado e aprovado pelas principais normas de segurança de capacetes, que serve de referência. Este foi validado de acordo com os impactos da norma. Após validado, este foi avaliado com o modelo de cabeça humana em elementos finitos e uma análise ao risco de existência de lesões foi efetuado. Com este mesmo capacete, foi concluído que para incorporar cortiça aglomerada, a espessura teria de ser reduzida. Então um novo modelo de capacete foi desenvolvido, sendo este uma espécie de modelo genérico com espessuras constantes. Um estudo paramétrico foi realizado, variando a espessura do capacete e submetendo o mesmo a duplos impactos. Os resultados destes impactos e da análise com o modelo de cabeça indicaram uma espessura ótima de 40 mm de cortiça aglomerada, com a qual o capacete tem uma melhor resposta a vários impactos do que se feito de poliestireno expandido.
Cork is a natural cellular material capable of withstanding considerable amounts of energy. These features make it an ideal material for some applications, such as impact protection. Regarding personal safety gear, synthetic materials, particularly expanded polystyrene, are typically used. These are also able to absorb reasonable amounts of energy by deforming permanently. On the other hand, in addition to cork being a natural material, it recovers almost entirely after deformation, which is a desired characteristic in multi-impact applications. In this work, the applicability of agglomerated cork in personal safety gear, specifically helmets, is analysed. Different types of agglomerated cork were experimentally characterized. These experiments were simulated in order to assess the validity of the constitutive models used to replicate cork's mechanical behaviour. In order to assess the helmets from a biomechanical point of view, a finite element human head model was developed. This head model was validated by simulating the experiments performed on cadavers available in the literature. Two helmet models were developed. One of a motorcycle helmet made of synthetic materials, which is available on the market and certified by the main motorcycle helmets safety standards, being used as reference. This helmet model was validated against the impacts performed by the European standard. After validated, this helmet model was analysed with the human head model, by assessing its head injury risk. With this helmet, it was concluded that a thinner helmet made of agglomerated cork might perform better. Thus, a new helmet model with a generic geometry and a constant thickness was developed. Several versions of it were created by varying the thickness and subjecting them to double impacts. The results from these impacts and the analyses carried out with the finite element head model indicated an optimal thickness of 40 mm, with which the agglomerated cork helmet performed better than the one made of expanded polystyrene.

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Ghaderidosst, Melody, Grabe Vilma Hurtigh, Rebecka Norman, Adam Rosvall, and Evelina Wiksten. "Production Process for Tunnel Modeling : An Analysis of Composites for Water Applications." Thesis, Uppsala universitet, Institutionen för materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-444830.

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Hydroelectric power is a leading source of renewable energy where large turbines convert the kinetic energy of water into electricity. In order to not exceed the capacity limit of the turbine, excess water in the dams needs to be diverted away through spillways. In order to do in-house testing of the water flow, a 1:30 scale tunnel manufactured by an external supplier is used. The production of the tunnels is however preferred to be done in-house. In this thesis different material options and methods for the tunnel modeling production are examined. This has been achieved by a thorough literature study following practical experiments. Polymers are known for their strength and stiffness to weight ratio as well as low cost and availability. To further enhance its material properties for given applications, polymers can be reinforced with different fibers creating a composite. Several fibers were considered, however in order to support the set strategy of Vattenfall AB regarding environmental and sustainability goals, natural fibers, specifically hemp and flax deemed to be a good fit using epoxy as the matrix material. Based on the material properties tested for the composites, flax with epoxy was the resulting material used to model the tunnels. The final method for the production process using said material was based on three different methods that were tested. The conclusion was that using a flax-epoxy composite with a hand lay-up method using a negative mold made of Styrofoam gave the best results. It should, however, be noted that a definite production process for the tunnel could not be determined due to time limitations. A theoretical production process for tunnel modeling was nevertheless composed.

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de, las Heras Reverte Víctor. "Evaluation of natural materials in Sustainable Buildings : A potential solution to the European 2050 long-term strategy." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-300115.

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Today, buildings consume 40% of total energy demand in the EU and are responsible for 36% of GHG emissions. For this reason, and due to the delicate situation of climate change that planet Earth is experiencing, solutions are being sought to make the building sector more sustainable. In the current project, the use of natural materials has been chosen as a solution in line with the EU 2050 long-term strategy. This research broadens the knowledge on sustainable building with natural materials as an alternative to conventional construction. To this end, first, an extensive state of the art has been carried out to gather information and identify research gaps on natural building materials and energy efficiency, proving the suitability of natural construction materials. Special emphasis has been put on straw bale construction and rammed earth construction, which have been studied individually. In addition, geometrically identical building models of both building techniques have been developed and simulated in Stockholm and Valencia in order to see how they would perform in different climates. Total energy demand for the straw-bale building of 140.22 kWh/(m2·year) in the case of Stockholm and 37.05 kWh/(m2·year) in the case of Valencia has been obtained. For the rammed earth building, a total demand of 301.82 kWh/(m2·year) has been obtained in Stockholm and 78.66 kWh/(m2·year) in Valencia. Once passive measures are applied in the different models, a reduction in demand for the straw bale building of 77.8% and 36.3% has been achieved for Stockholm and Valencia, respectively. In the rammed earth building, in contrast, the demand has been reduced by 86.3% in Stockholm and 73.9% in Valencia. Heat recovery ventilation and high insulation level have been identified as imperative needs in Stockholm, in contrast to Valencia. Other improvement strategies such as windows substitution, air permeability improvement, or natural ventilation for cooling have been implemented. Apart from that, better performance of the straw-bale buildings has been identified for both climates. Additionally, focusing on thermal inertia, its influence has been identified as not completely significant in terms of annual demand in the simulated climates.

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Windsor-Collins, Andrea Grace. "Resolving the morphological and mechanical properties of palm petioles : shape analysis methods for symmetric sections of natural form." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/13722.

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Palms support the largest leaves in the world and have evolved on Earth for over 120 million years. They are often reported to be the only structure left standing post-hurricane. Cross-sectional shapes of cantilevered structures are important design factors affecting torsional and bending performance. Understanding the shape contribution of natural sections such as palm petioles (modified leaf stalks) is more difficult than those for simple 2D shapes because conventional methods of calculating section properties are not well suited to these irregular shapes. The role of internal structure, material properties and external shape of palm petioles in cantilever performance has been investigated and three main contributions to knowledge result from this research. Firstly, 3D mapping, i.e., the size, orientation and position, of vascular bundles in the Trachycarpus fortunei palm petiole reveals the distributions of stress and Young’s modulus values, providing a more detailed understanding of petioles than previous work. Secondly, bulk elastic material properties along the longitudinal axis of the same petiole are then input to a bi-layered model of the same petiole establishing the Young’s modulus of the two layers without mechanically testing them individually and for determining that the outer layer is not lignified. Thirdly, the largest contribution is the introduction of modified shape transformers employing the use of circular envelopes, eliminating error caused by approximating second moment of area with the torsional constant. This leads to a novel Shape Edge Mapping (SEM) technique which deconstructs petiole cross section shape elements and enables the structural contribution of these elements to be calculated, improving the understanding of the petiole section and how it relates to its mechanical function. This thesis makes a valuable addition to the knowledge of palm function and presents novel techniques for non-destructive extraction of natural shape data for abstraction and use in preliminary engineering design.

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Palm, Viveka. "Material flow analyses in technosphere and biosphere – metals, natural resources and chemical products." Doctoral thesis, KTH, Civil and Environmental Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3318.

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Books on the topic "Analysis of natural materials"

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R, Wolf Wayne, ed. Biological reference materials: Availability, uses, and need for variation of nutrient measurement. New York: Wiley, 1985.

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1943-, Wolf Wayne R., and Federation of Analytical Chemistry and Spectroscopy Societies. Meeting, eds. Biological reference materials: Availability, uses, and need for validation of nutrient measurement. New York: Wiley, 1985.

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Šesták, Jaroslav. Thermal analysis of Micro, Nano- and Non-Crystalline Materials: Transformation, Crystallization, Kinetics and Thermodynamics. Dordrecht: Springer Netherlands, 2013.

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Natural element method for the simulation of structures and processes. London: ISTE, 2011.

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Larson, Magnus. Analysis of cross-shore movement of natural longshore bars and material placed to create longshore bars. [Vicksburg, Miss: U.S. Army Engineer Waterways Experiment Station, 1992.

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Center, Langley Research, ed. An analytical study of the effects of transverse shear deformation and anisotropy on natural vibration frequencies of laminated cylinders. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1988.

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Center, Langley Research, ed. An analytical study of the effects of transverse shear deformation and anisotropy on natural vibration frequencies of laminated cylinders. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1988.

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Veer, Grishja van der. Geochemical soil survey of the Netherlands: Atlas of major and trace elements in topsoil and parent material; assessment of natural and anthropogenic enrichment factors. Utrecht: Koninklijk Nederlands Aardrijkskundig Genootschap, 2005.

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Genootschap, Koninklijk Nederlands Aardrijkskundig, and Rijksuniversiteit te Utrecht. Faculteit Geowetenschappen., eds. Geochemical soil survey of the Netherlands: Atlas of major and trace elements in topsoil and parent material; assessment of natural and anthropogenic enrichment factors. Utrecht: Koninklijk Nederlands Aardrijkskundig Genootschap, Faculteit Geowetenschappen Universiteit Utrecht, 2006.

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Akbarov, Surkay. Stability Loss and Buckling Delamination: Three-Dimensional Linearized Approach for Elastic and Viscoelastic Composites. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.

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Book chapters on the topic "Analysis of natural materials"

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Gratuze, Bernard. "Analysis of Vitreous Archaeological Materials by LA-ICP-MS." In Natural Science in Archaeology, 137–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49894-1_9.

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Dussubieux, Laure. "Analysis of Non-siliceous Archaeological Materials by LA-ICP-MS." In Natural Science in Archaeology, 91–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49894-1_6.

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Guo, Yan, Tao Wang, Chenglong Xu, Limin Liu, Lizhen Wang, Zhen Qin, Zhentao Liu, et al. "Analysis of corrosion factors in natural gas wells." In Advances in Energy Materials and Environment Engineering, 142–46. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003332664-22.

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Freitas, M. G. S., E. D. F. Castilho, A. R. G. Azevedo, J. A. T. Linhares júnior, M. T. Marvila, and S. N. Monteiro. "Characterization and Stain Analysis in Natural and Artificial Rocks." In Characterization of Minerals, Metals, and Materials 2022, 229–37. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92373-0_21.

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Kourkoulis, S. K., E. Ganniari-Papageorgiou, and N. L. Ninis. "The Size-Effect for Natural Building Stones." In Experimental Analysis of Nano and Engineering Materials and Structures, 957–58. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6239-1_476.

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Subramaniam, Nitya, Gul e. Saman, and Edwin R. Hancock. "Natural Material Segmentation and Classification Using Polarisation." In Pattern Recognition and Image Analysis, 468–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21257-4_58.

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Kheirikhah, Mohammad Mahdi, Vahid Babaghasabha, Arash Naeimi Abkenari, and Mohammad Ehsan Edalat. "Natural Vibration Analysis of Soft Core Corrugated Sandwich Plates Using Three-Dimensional Finite Element Method." In Advanced Structured Materials, 163–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31497-1_11.

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Poletto, Matheus, Heitor L. Ornaghi Júnior, and Ademir J. Zattera. "Thermal Decomposition of Natural Fibers: Kinetics and Degradation Mechanisms." In Reactions and Mechanisms in Thermal Analysis of Advanced Materials, 515–45. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119117711.ch21.

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Ertel, A., M. Betzl, and H. Kaempf. "Texture Investigation of Natural Rock-Salt by Neutron Diffraction." In X-Ray and Neutron Structure Analysis in Materials Science, 139–42. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0767-9_20.

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Kourkoulis, S. K. "Transversely Isotropic Natural Building Stones Under Three-Point Bending." In Experimental Analysis of Nano and Engineering Materials and Structures, 951–52. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6239-1_473.

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Conference papers on the topic "Analysis of natural materials"

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Moskvina, E. Yu, and K. V. Syzrantseva. "Spectral analysis of tubing natural frequencies." In MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS-2019): Proceedings of the 13th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5135116.

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Wulandari, Dyah Arum, Nasruddin, and Euis Djubaedah. "Thermal behavior and structure stability analysis of Indonesian natural zeolite." In INTERNATIONAL CONFERENCE ON TRENDS IN MATERIAL SCIENCE AND INVENTIVE MATERIALS: ICTMIM 2020. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0014649.

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Tian, Y., and C. Y. Zhao. "Thermal Analysis in Phase Change Materials (PCMs) Embedded With Metal Foams." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22452.

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The heat transfer enhancement for phase change materials (PCMs) has received increasing attention nowadays, since most of PCMs have low thermal conductivities which prolong the charging and discharging processes. Metal foams, as a sort of novel material with high thermal conductivity, are believed to be a promising solution to enhance the heat transfer performance of PCMs for thermal energy storage systems. The effects of natural convection on heat transfer enhancement for PCMs embedded with metal foams are investigated in this paper. The numerical investigation is based on the two-equation non-equilibrium heat transfer model, where the coupled heat conduction and natural convection in PCMs are considered at phase transition and liquid zones. The numerical results are validated by experimental data. In order to investigate the effect of metal foams on heat transfer, two different cases are compared in this study, which are the Case A (PCMs embedded with metal foams) and the Case B (pure PCMs). At the solid zone, heat conduction plays a dominant part because of natural convection’s absence, thus metal foams achieve much higher heat conduction rate than pure PCMs, and this can be attributed to the high thermal conductivity of metal foams skeleton and the heat can be quickly transferred through the foam solid structure to the whole domain of PCMs. At the two-phase zone and liquid zone, natural convection takes place and becomes the dominant heat transfer mode, but metal foam structures suppress the natural convection inside the PCMs owing to big flow resistance in metal foams. In spite of this suppression caused by metal foams, the overall heat transfer performance of Case A is still superior to the counterpart of Case B (pure PCMs), implying the enhancement of heat conduction offsets or exceeds the natural convection loss. The results show that the heat transfer enhancement due to the natural convection in PCMs embedded with metal foams is not as strong as expected, since metal foams have big flow resistance and the natural convection is suppressed. It also shows that better heat transfer performance can be achieved by using the metal foams of smaller porosity and bigger pore density. Last but not least, a series of detailed velocity and temperature profiles are given through numerical solutions, in order to present a vivid evolution of flow field and temperature profiles in the whole melting process.

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MATSUO, N., K. SOMEYA, Y. UEDA, H. ARAKAWA, and M. MAEDA. "CHEMILUMINESCENT ANALYSIS OF HYDROGEN PEROXIDE GENERATION FROM NATURAL ANTIMICROBIAL MATERIALS." In Proceedings of the 13th International Symposium. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812702203_0075.

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Wang, Qingmei, and Peng Shi. "Notice of Retraction: Applications of fuzzy judgment in analysis of materials." In 2010 Sixth International Conference on Natural Computation (ICNC). IEEE, 2010. http://dx.doi.org/10.1109/icnc.2010.5582730.

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Song, Hyun Jeong, Young-Tai Choi, Norman M. Wereley, and Ashish S. Purekar. "Analysis of Energy Harvesting Devices Using Macro-Fiber Composite Materials." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35786.

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This paper addresses modeling, design, theoretical and experimental characteristics of an energy harvesting device utilizing macro-fiber composite (MFC) materials. The energy harvesting device is composed of a cantilever beam with MFC materials, a tip mass, a rectifier, and an electrical resistance. An theoretical model of the energy harvesting device is established for estimation of generated power, voltage, and current under sinusoidal base excitation at its first natural frequency. Parametric studies are achieved to maximize generated power and current with variation of beam thickness, natural frequency, type of MFC and electrical resistance. Also, performance characteristics of the energy harvesting device with two MFC patches are theoretically and experimentally evaluated under different acceleration levels.

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Zhang, Hui, Xiaxi Li, Linlin Xing, and Qingyu Wang. "The design and thermodynamic analysis of electricity-Compressed Natural Gas multi-compression process using natural gas pressure energy." In 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/ifeesm-17.2018.174.

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Lin, Zhicheng, Chengwei Huang, Fei He, and Qiongxian Gao. "Analysis of natural vibration characteristics of pre-stressed apace truss." In First International Conference on Information Sciences, Machinery, Materials and Energy. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icismme-15.2015.14.

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Atmakuri, Ayyappa, Giedrius Janusas, Madhusudhan Siddabathula, and Arvydas Palevicius. "Wettability and Moisture Analysis on Natural Fiber Reinforced Epoxy Resin Hybrid Composites." In 2020 Mechatronics Systems and Materials (MSM). IEEE, 2020. http://dx.doi.org/10.1109/msm49833.2020.9202320.

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Rinawati, Dyah Ika, Diana Puspita Sari, Bambang Purwanggono, and Andy Tri Hermawan. "Environmental impact analysis of batik natural dyes using life cycle assessment." In 3RD INTERNATIONAL MATERIALS, INDUSTRIAL AND MANUFACTURING ENGINEERING CONFERENCE (MIMEC2017). Author(s), 2017. http://dx.doi.org/10.1063/1.5010661.

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Reports on the topic "Analysis of natural materials"

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Becker, Sarah, Heather Sussman, S. Blundell, Vern Vanderbilt, and Igor Semyonov. Analysis of spectropolarimetric responses in the visible and infrared for differentiation between similar materials. Engineer Research and Development Center (U.S.), September 2022. http://dx.doi.org/10.21079/11681/45422.

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Spectropolarimetric research has focused on target detections of materials that have a high degree of contrast from background materials, such as identification of a manmade object embedded in a vegetative background. This study presents an approach using spectropolarimetric imagery in visible, shortwave infrared, and longwave infrared bands to differentiate between similar natural and manmade materials. The method employs Michelson contrast and Kruskal-Wallis one-way analysis of variance (ANOVA) H-test to determine if a distinction can be found in pairwise comparisons of similar and different materials using the Stokes parameters in the visible, shortwave infrared, and longwave infrared bands. Results showed that similar natural and manmade materials were differentiable in spectropolarimetric imagery using the Michelson contrast and ANOVA. This approach provides a way to use spectropolarimetric imagery to distinguish between materials that are similar to each other.

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Berkowitz, Jacob, Nathan Beane, Kevin Philley, Nia Hurst, and Jacob Jung. An assessment of long-term, multipurpose ecosystem functions and engineering benefits derived from historical dredged sediment beneficial use projects. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41382.

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The beneficial use of dredged materials improves environmental outcomes while maximizing navigation benefits and minimizing costs, in accordance with the principles of the Engineering With Nature® (EWN) initiative. Yet, few studies document the long-term benefits of innovative dredged material management strategies or conduct comprehensive life-cycle analysis because of a combination of (1) short monitoring time frames and (2) the paucity of constructed projects that have reached ecological maturity. In response, we conducted an ecological functional and engineering benefit assessment of six historic (>40 years old) dredged material–supported habitat improvement projects where initial postconstruction beneficial use monitoring data was available. Conditions at natural reference locations were also documented to facilitate a comparison between natural and engineered landscape features. Results indicate the projects examined provide valuable habitat for a variety of species in addition to yielding a number of engineering (for example, shoreline protection) and other (for example, carbon storage) benefits. Our findings also suggest establishment of ecological success criteria should not overemphasize replicating reference conditions but remain focused on achieving specific ecological functions (that is, habitat and biogeochemical cycling) and engineering benefits (that is, storm surge reduction, navigation channel maintenance) achievable through project design and operational management.

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Perdigão, Rui A. P. Information physics and quantum space technologies for natural hazard sensing, modelling and prediction. Meteoceanics, September 2021. http://dx.doi.org/10.46337/210930.

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Disruptive socio-natural transformations and climatic change, where system invariants and symmetries break down, defy the traditional complexity paradigms such as machine learning and artificial intelligence. In order to overcome this, we introduced non-ergodic Information Physics, bringing physical meaning to inferential metrics, and a coevolving flexibility to the metrics of information transfer, resulting in new methods for causal discovery and attribution. With this in hand, we develop novel dynamic models and analysis algorithms natively built for quantum information technological platforms, expediting complex system computations and rigour. Moreover, we introduce novel quantum sensing technologies in our Meteoceanics satellite constellation, providing unprecedented spatiotemporal coverage, resolution and lead, whilst using exclusively sustainable materials and processes across the value chain. Our technologies bring out novel information physical fingerprints of extreme events, with recently proven records in capturing early warning signs for extreme hydro-meteorologic events and seismic events, and do so with unprecedented quantum-grade resolution, robustness, security, speed and fidelity in sensing, processing and communication. Our advances, from Earth to Space, further provide crucial predictive edge and added value to early warning systems of natural hazards and long-term predictions supporting climatic security and action.

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Science, Fera. Analysis of CBD Products. Food Standards Agency, November 2022. http://dx.doi.org/10.46756/sci.fsa.cis490.

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The Food Standards Agency commissioned Fera Science Ltd. to carry out a survey to obtain a snapshot of CBD products on sale in England and Wales in order to inform FSA risk assessment of CBD products. Thirty CBD products were purchased from a range of online sellers from England and Wales. Samples comprised of two broad categories: oils and sprays, and edibles (including beverages). The sampling followed a scheme suggested by FSA. This is not a statistically representative sample of the market and instead provides a snapshot of the current market, to assist the design of future sampling and surveillance activity. There is the potential for residues of chemicals to be present in CBD products as a result of their natural occurrence in the raw material or arising from the manufacturing process, for example, mycotoxins, metals, pesticides, and the residues of solvents used to extract CBD. This study informs the FSA’s understanding of the type and levels of contaminants that may arise in CBD products. A wide range of analysis on CBD products was undertaken using accredited methods, for heavy metals, Polycyclic Aromatic Hydrocarbons (PAHs), pesticides, mycotoxins, CBD content and cannabinoid profiles. Analysis for residual solvents and additional mycotoxins was also carried out, but these were not accredited. The results of testing found the following: Heavy metals (cadmium, mercury & lead) and arsenic were not detected in the majority of samples, meaning levels were below the limits of quantification of the method. Seven samples contained lead, four samples arsenic and two samples contained cadmium. Mercury was not found in any sample. A definitive statement as to whether products exceed maximum levels cannot be made due to uncertainty as to whether products would be classified as a food (i.e. oil) or a food supplement. A low incidence of low levels of mycotoxins, with Fusarium mycotoxins found more frequently than aflatoxins and ochratoxin A, mostly at the methods reporting limit. Three samples were found to contain ochratoxin A at the methods reporting limit. A total of seven pesticide residues were found across all of the products (each product was tested for over 400 pesticides). There are no specific Maximum Residue Limits (MRL) for CBD products. One oil product was found to have PAHs above the regulated levels, if classed as a product for direct consumption. If classed as a food supplement the PAHs were within regulated levels. Three samples contained residual solvents. One product was over the MRL. Most products contained CBD close to the declared value. Two oils had substantially different levels than that declared (one higher and one lower). CBD was not detected in one of the drink products. These are potentially non-compliant with compositional and standards requirements. Delta 9-THC was detected in 87 % (26) of the samples analysed. Of these 40% (12) were found to have THC+ (the total sum of illicit cannabinoids in the product) above the 1mg threshold outlined in current Home Office guidance (Opens in a new window).

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Myshakin, Evgeniy M., Vyacheslav N. Romanov, and Randall Timothy Cygan. Natural materials for carbon capture. Office of Scientific and Technical Information (OSTI), November 2010. http://dx.doi.org/10.2172/1002102.

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Cajas, María Augusta, Marcela Cabrera, Jaime Astudillo, Yulissa Abad, and Daniela Astudillo. Accuracy in marginal and/or internal adaptation of full-coverage fixed prostheses made with digital versus conventional impressions: an overview of systematic reviews and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, October 2021. http://dx.doi.org/10.37766/inplasy2021.10.0024.

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Review question / Objective: Is the accuracy (marginal adaptation and / or internal adaptation) of fixed full coverage prostheses made with digital impressions better than conventional impressions? Eligibility criteria: Inclusion criteria• Systematic reviews and / or meta-analyzes that evaluated the precision (marginal adaptation and / or internal adaptation) of full coverage fixed prostheses on natural teeth in clinical studies and on tooth replicas in in vitro studies.• Systematic reviews and / or meta-analyzes comparing digital impressions with an intraoral scanner versus conventional impressions taken with any impression material.• Systematic reviews and / or meta-analyzes of randomized clinical trials (RCTs), prospective comparative and in vitro and non-randomized clinical trials.Exclusion criteria:• Systematic literature reviews, case reports, pilot studies• Studies evaluating the seating of crowns on implants and partial restorations• Studies with no response from the author to the requested information query.

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Savosko, V., I. Komarova, Yu Lykholat, E. Yevtushenko, and T. Lykholat. Predictive model of heavy metals inputs to soil at Kryvyi Rih District and its use in the training for specialists in the field of Biology. IOP Publishing, 2021. http://dx.doi.org/10.31812/123456789/4511.

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The importance of our research is due to the need to introduce into modern biological education methods of predictive modeling which are based on relevant factual material. Such an actual material may be the entry of natural and anthropic heavy metals into the soil at industrial areas. The object of this work: (i) to work out a predictive model of the total heavy metals inputs to soil at the Kryvyi Rih ore-mining & metallurgical District and (ii) to identify ways to use this model in biological education. Our study areas are located in the Kryvyi Rih District (Dnipropetrovsk region, Central Ukraine). In this work, classical scientific methods (such as analysis and synthesis, induction and deduction, analogy and formalization, abstraction and concretization, classification and modelling) were used. By summary the own research results and available scientific publications, the heavy metals total inputs to soils at Kryvyi Rih District was predicted. It is suggested that the current heavy metals content in soils of this region due to 1) natural and 2) anthropogenic flows, which are segmented into global and local levels. Predictive calculations show that heavy metals inputs to the soil of this region have the following values (mg ⋅ m2/year): Fe – 800-80 000, Mn – 125-520, Zn – 75-360, Ni – 20-30, Cu – 15-50, Pb – 7.5-120, Cd – 0.30-0.70. It is established that anthropogenic flows predominate in Fe and Pb inputs (60-99 %), natural flows predominate in Ni and Cd inputs (55-95 %). While, for Mn, Zn, and Cu inputs the alternate dominance of natural and anthropogenic flows are characterized. It is shown that the predictive model development for heavy metals inputs to soils of the industrial region can be used for efficient biological education (for example in bachelors of biologists training, discipline "Computer modelling in biology").

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Савосько, Василь Миколайович, Ірина Олександрівна Комарова, Юрій Васильович Лихолат, Едуард Олексійович Євтушенко,, and Тетяна Юріївна Лихолат. Predictive Model of Heavy Metals Inputs to Soil at Kryvyi Rih District and its Use in the Training for Specialists in the Field of Biology. IOP Publishing, 2021. http://dx.doi.org/10.31812/123456789/4266.

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The importance of our research is due to the need to introduce into modern biological education methods of predictive modeling which are based on relevant factual material. Such an actual material may be the entry of natural and anthropic heavy metals into the soil at industrial areas. The object of this work: (i) to work out a predictive model of the total heavy metals inputs to soil at the Kryvyi Rih ore-mining & metallurgical District and (ii) to identify ways to use this model in biological education. Our study areas are located in the Kryvyi Rih District (Dnipropetrovsk region, Central Ukraine). In this work, classical scientific methods (such as analysis and synthesis, induction and deduction, analogy and formalization, abstraction and concretization, classification and modelling) were used. By summary the own research results and available scientific publications, the heavy metals total inputs to soils at Kryvyi Rih District was predicted. It is suggested that the current heavy metals content in soils of this region due to 1) natural and 2) anthropogenic flows, which are segmented into global and local levels. Predictive calculations show that heavy metals inputs to the soil of this region have the following values ( mg ∙ m ଶ year ⁄ ): Fe – 800-80 000, Mn – 125-520, Zn – 75-360, Ni – 20-30, Cu – 15-50, Pb – 7.5-120, Cd – 0.30-0.70. It is established that anthropogenic flows predominate in Fe and Pb inputs (60-99 %), natural flows predominate in Ni and Cd inputs (55-95 %). While, for Mn, Zn, and Cu inputs the alternate dominance of natural and anthropogenic flows are characterized. It is shown that the predictive model development for heavy metals inputs to soils of the industrial region can be used for efficient biological education (for example in bachelors of biologists training, discipline “Computer modelling in biology”).

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Popel, Maiia V., and Mariya P. Shyshkina. The Cloud Technologies and Augmented Reality: the Prospects of Use. [б. в.], November 2018. http://dx.doi.org/10.31812/123456789/2662.

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The article discusses the prospects of the augmented reality using as a component of a cloud-based environment. The research goals are the next: to explore the possibility of the augmented reality using with the involvement of the cloud-based environment components. The research objectives are the next: to consider the notion of augmented reality; to analyze the experience the augmented reality using within the cloud environment / system; to outline the prospects of the augmented reality using in educational institutions; to consider the technical conditions of the augmented reality use. The object of research is: the educational process in educational institutions of Ukraine of different levels of accreditation. The subject of research is: the educational process in a cloud-based environment in educational institutions of Ukraine. The research methods used are the next: analysis of scientific publications, observations. The results of the research are the next: on the basis of the analysis of scientific works, it has been established that the experience of the augmented reality using in the systems based on cloud technologies already exists. However, the success of such a combination has not yet been proven. Currently, laboratory tests are known, while the experiment was not carried out under natural conditions in control and experimental groups. It is revealed that the attraction of the augmented reality for the educators requires the development of new methodologies, didactic materials, updating and updating of the curriculum. The main conclusions and recommendations: the main principles of augmented reality use in the learning process are: designing of the environment that is flexible enough, attention should be paid to the teaching and didactic issues; adjusting the educational content for mastering the material provided by the curriculum; the research methods that can be used in training along with the elements of augmented reality are to be elaborated; development of adaptive materials; training of teachers, which will include augmented reality in educational practice.

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Grubb, T. G. Constructing bald eagle nests with natural materials. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1995. http://dx.doi.org/10.2737/rm-rn-535.

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