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11th International Conference of the Balkan Physical Union, BPU 2022

作者： Kalantzis, Ioannis Hatzikraniotis, Euripides Program of Post Graduate Studies on "Didactics of Physics and Educational Technology" Department of Physics Aristotle University of Thessaloniki Thessaloniki54124 Greece Department of Physics Aristotle University of Thessaloniki Thessaloniki54124 Greece

Nature has developed materials, objects and procedures that occur in the macro-scale as well as the nanoscale. The results of millions of years of biological evolution and the optimized "techniques" developed by the organisms are available to scientists who seek new ideas by studying the solutions provided by nature. The scientific field that allows man to imitate nature and to develop nanomaterials, nanomachines and processes with various desired properties is called Biomimetics. The widespread use of Nanotechnology products by our modern technological society and the growing need of the industry for a working force specialized in this field are two of the main reason for the introduction of Biomimetics and Nanotechnology in school curricula. This paper presents a proposal for the introduction in Secondary Education of a highly popular phenomenon from the field of Biomimetics known as the Rose petal Phenomenon. This is the phenomenon of strong adhesion of small water droplets on some superhydrophobic variants of rose petals. By studying the phenomenon, students have the opportunity to come in contact with several big ideas of science, to understand the possible misconceptions they might have, to get acquainted with scientific processes, scientific instruments, scientific models and to develop important skills. The scientific content the Rose petal Phenomenon comes from Bharat Bhushan's book "Biomimetics: Bioinspired Hierarchical-Structure Surfaces for Green Science and Technology". For the effective integration of this subject in the school classroom, the Model of Educational Reconstruction MER was applied. Following a constructive epistemological orientation, the students' perceptions, interests, needs and expected difficulties were taken into account. The results of the application of the MER model are the creating of 5 teaching activities and their learning objectives to get students acquainted with the phenomenon as well as the science behind it. © Copyright ow

关键词： Students

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Design & Development of teaching materials for Introducing Wetting Models in Science Club 11

Design & Development of teaching materials for Introducing W...

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11th International Conference of the Balkan Physical Union, BPU 2022

作者： Arvanitou, Efthymia Tsaousidi, Marina Hatzikraniotis, Euripides Program of post-graduate Studies on"Didactics of Physics & Educational Technology" Aristotle University of Thessaloniki Physics Department Thessaloniki541 24 Greece Aristotle University of Thessaloniki Physics Department Thessaloniki541 24 Greece

Nanoscience and Nanotechnology (NS-T) are of the most rapidly emerging fields. Manipulation of the matter in the nanoscale has resulted in innovative products and concepts in the macroscale. Biomimetics especially, has utilized NS-T to create pioneering products, such as self-cleaning surfaces, super hydrophobic or hydrophilic materials, based on understanding and handling the wettability of surfaces. Wetting Models are used to describe various wetting states of a surface. Wetting models portray the different ways of a surface's wetting and the way the procedure is actually determined by its micro- and nano- roughness. Although a subject rarely encountered among educational interventions in Biomimetics, it provides fundamental context for comprehending phenomena such as hydro- and oleo- philicity and phobicity, the Lotus Effect, and the Rose Petal Effect. Their introduction is thus considered appropriate to occur in order to establish a solid theoretical background concerning the aforementioned phenomena. In the present study the design of teaching materials about Wetting Models addressed to Secondary Education is being described. To the means of structuring a specific teaching plan based on the instructional model of 5E's, Educational Reconstruction Model (MER) has been utilized. Decontextualizing scientific content and recontextualizing it, taking into account the characteristics and the factors affecting the learning process. As a result, six teaching modules have been created. Learning goals, association with the 9 Big Ideas of NS-T of these modules, as well as misconceptions expected to emerge will be presented. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).

关键词： Wetting

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Teaching learning sequence for the introduction of superhydrophobicity in secondary education 11

Teaching learning sequence for the introduction of superhydr...

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11th International Conference of the Balkan Physical Union, BPU 2022

作者： Pelekas, Lazaros Hatzikraniotis, Euripides Program of post-graduate Studies on"Didactics of Physics & Educational Technology" Aristotle University of Thessaloniki Physics Department Thessaloniki541 24 Greece Aristotle University of Thessaloniki Physics Department Thessaloniki541 24 Greece

Many biological surfaces are known for their micro- and nanoscale structures, which combined with their hierarchical properties lead to superhydrophobic surfaces. The lotus leaf is the most studied leaf surface that exhibits superhydrophobicity. The knowledge gained by examining its leaf properties helps scientists design superhydrophobic surfaces that benefit humanity on a daily basis. Therefore, there is a necessity to update school science curricula by integrating nanotechnology-related concepts that are both relevant and meaningful to students. This work suggests a proposal for the introduction of superhydrophobicity in secondary education through the development of a teaching learning sequence. Through the MER methodology, the scientific content is analyzed and transformed into a content structure for instruction, defining the learning objectives of each unit through the 5E Instructional Model and considering the difficulties and misconceptions that students may have. The implementation of the educational reconstruction will be presented considering all the parameters involved in the learning process. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).

关键词： Students

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Sodium niobate with high photocatalytic activity for the removal of organic dye and inactivation of Escherichia coli, Staphylococcus aureus, and Klebsiella pneumoniae bacteria: the effect of Zn doping on these properties

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Ceramics International 2025年

作者： Fernandes, Daiane Raubach, Cristiane Trassante, Carla Dias, Vagner Melo, Luize Silveira, Marcelle Carvalho, Ramon Moreira, Mario Jardim, Pedro Ferrer, Mateus Giongo, Janice Vaucher, Rodrigo Longo, Elson Cava, Sergio Post-Graduate Program in Materials Science and Engineering Federal University of Pelotas RS Pelotas96010-610 Brazil Post-Graduate Program in Microbiology and Parasitology Federal University of Pelotas RS Capão do Leão96160-000 Brazil Post-Graduate Program in Physics Federal University of Pelotas RS Capão do Leão96160-000 Brazil Functional Materials Development Center São Carlos Federal University SP São Carlos13565-905 Brazil

NaNbO3 doped with Zn (0.00, 0.02, and 0.05 mmol) was synthesized by the microwave-assisted hydrothermal method. Photocatalytic and antibacterial activities were investigated. X-ray diffraction revealed the coexistence of two orthorhombic symmetries (P21ma and Pbma), with doping promoting a progressive increase in the Pbma fraction. All samples exhibited a fiber-like shape (diameter of ∼200 nm), which remained unchanged with doping. The low Zn content (0.02 mmol) reduced the band gap energy from 3.08 to 2.95 eV. As a result, this sample exhibited superior photocatalytic activity, achieving 100 % RhB dye degradation within 45 min, under UV light. Scavenger tests revealed that hydroxyl radicals, holes, and superoxide radical anions were the main active species involved in the photocatalytic reaction. Additionally, the photocatalyst demonstrated excellent recyclability over three consecutive cycles. Pure NaNbO3 exhibited strong antibacterial activity, completely inhibiting the growth of S. aureus, E. coli, and K. pneumoniae at the tested concentrations. Although the Zn-doped sample also demonstrated antibacterial action, the response was concentration-dependent. This study is the first report on Zn doping in NaNbO3, as well as the first investigation of its antibacterial activity against K. pneumoniae and S. aureus. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Escherichia coli

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OSINT Methods in the Intelligence Cycle

OSINT Methods in the Intelligence Cycle

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International Conference on Computer Science, Electronics, and Industrial Engineering, CSEI 2022

作者： Tanabe, Roberto de-Oliveira-Albuquerque, Robson da-Silva-Filho, Demétrio Alves-da-Silva, Daniel Costa-Gondim, João-Jose Professional Post-Graduate Program in Electrical Engineering Department of Electrical Engineering University of Brasília Brasília70910-900 Brazil Institute of Physics University of Brasilia DF Brasilia70910-900 Brazil DF Brasília70910-900 Brazil

ISBN: (纸本)9783031305917

The process for producing intelligence is traditionally represented by a series of steps forming a cycle. Collection is one of these stages and is characterized by the application of a set of disciplines to obtain information that will be analyzed for the production of an intelligence product. These disciplines are characterized according to the type of source, its methods and techniques. Open-Source Intelligence (OSINT) is the collection discipline focused on publicly available information. Open-source collection methods are usually represented by working diagrams that draw a flow according to the type of information. This paper makes a comparative study of the intelligence cycles of some relevant actors in the international OSINT scene, locates open-source collection in the intelligence cycle, and presents a workflow that combines this cycle with the techniques that form a method for OSINT. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Intelligence Methodology OSINT

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Vitrification of hazardous wastes from ship recycling: circular economy solutions for asbestos and synthetic vitreous fibers

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Environmental Science and Pollution Research 2025年第13期32卷 8183-8200页

作者： Pereira, Newton Narciso de Castro Bertagnolli, Denise da Silva, Ladário Faria, Eliel Eleutério Junior, José Mauro Moraes de Araujo de Monteiro Barros, Munique Eva Paiva Miranda, Tainara Alves de Oliveira Lima, Eduardo da Silva Almeida, Vitor Duarte Department of Production Engineering School of Industrial Engineering and Metallurgy at Volta Redonda - EEIMVR – Federal Fluminense University UFF Av. dos Trabalhadores 420 – Sala C77 Vila Sta. Cecília RJ Volta Redonda27255-125 Brazil Department of Chemistry Exact Sciences Institute Federal Fluminense University UFF Rua Desembargador Ellis Hermydio Figueira 783 RJ AterradoVolta Redonda27213-145 Brazil Department of Physics Exact Sciences Institute Federal Fluminense University UFF Rua Desembargador Ellis Hermydio Figueira 783 RJ AterradoVolta Redonda27213-145 Brazil Department of Physics Universidade Federal de Roraima Av. Cap. Ene Garcez N. 2413 Paricarana Roraima Boa Vista69310-000 Brazil Departament of Metallurgical Engineering Federal Fluminense University UFF Av. dos Trabalhadores 420 Vila Sta. Cecília RJ Volta Redonda27255-125 Brazil Physics Post-Graduate Program Brazilian Center for Physics Research Rua Doutor Xavier Sigaud 150 Urca RJ Rio de Janeiro22290-180 Brazil Physics Post-Graduate Program Physics Institute Federal Fluminense University UFF Av. Gal. Milton Tavares de Souza S/nº Praia Vermelha Campus RJ Niterói24210-346 Brazil

Ship recycling at the end of its useful life presents significant environmental and health challenges due to the presence of hazardous materials, such as asbestos and synthetic vitreous fibers (SVFs). This study aimed to convert SVFs and asbestos into safe, reusable co-products by incorporating them into a glassy matrix. The materials were melted at 1200 °C for 1 h with utilization of niobium pentoxide (Nb2O5) to lower fusion temperatures. Samples collected from an offshore vessel and platform being recycled in Rio de Janeiro, Brazil, were analyzed using energy-dispersive x-ray spectroscopy (EDS) and scanning electron microscopy (SEM), revealing the presence of SVFs but not asbestos. Seven types of glass were produced, with their non-crystalline, glassy nature confirmed by the presence of an amorphous halo in X-ray diffraction (XRD) and a glass transition observed in differential scanning calorimetry (DSC). These findings demonstrate the potential to transform hazardous waste into value-added products, advancing a circular economy in ship recycling operations. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Asbestos

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Two Phase Dip-Coating Method: Growth Mechanisms and Effects on Electrical Properties of Tio2 and Tio2/Sno2

SSRN

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SSRN 2023年

作者： Pedrini, Luiz Felipe K. de Andrade Scalvi, Luis Vicente School of Sciences POSMAT - Post-Graduate Program in Materials Science and Technology SP Bauru Brazil School of Sciences Department of Physics SP Bauru Brazil

A dip-coating process is proposed for preparation of TiO2 thin films from a segregated fluid system. To study its effects, by changing the height of the floating, less dense phase, it was possible to modify the main draining mechanism, which has decreased agglomerate size during gelification process. By reducing the amount of volume adhered to the emerging substrate it was possible to shift the draining regime mechanism towards the capillary regime, a change mostly observed before only in slower emerging deposition rates. It was also found that further reduction in adhered volume decreased the size of agglomerates during deposition, which affected transparency and electrical conductivity of prepared films. A further increase in floating phase height was shown to lower roughness in film surface. This has lead to a better coupled interface in TiO2/SnO2 heterostructure, as seen by type II hererojunction behavior, when TiO2 films, deposited on top of a SnO2 films, are prepared with solutions with 0.6 cm of floating phase height. © 2023, The Authors. All rights reserved.

关键词： Titanium dioxide

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The role of digital modules on cognitive ability of high school students in Newton’s law material 10

The role of digital modules on cognitive ability of high sch...

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10th National physics Seminar, SNF 2021

作者： Wirdiyatusyifa Sunarno, W. Supriyanto, A. Physics Education of Post Graduate Program Universitas Sebelas Maret Surakarta Indonesia Physics Education Universitas Sebelas Maret Surakarta Indonesia Physics Department Universitas Sebelas Maret Surakarta Indonesia

Students perceive physics as a difficult subject to understand because the material contains a lot of formulas, mathematical calculations, and abstract concepts. One of the physics materials for high school students in Newton's law. Newton's law is one of the materials considered difficult to understand by students because the basic concepts in Newton's law material, namely the concept of force have not been fully mastered by students, resulting in students' cognitive physics abilities that are still low and have not reached the minimum completeness criteria (KKM). This study aims to examine the role of the digital module in improving students' cognitive abilities in Newton's Law material. The research subjects were 108 students of class X MIA in 3 high schools in the Surakarta residency. The study used a quantitative descriptive method with a test technique using 20 multiple choice questions about Newton's Law. Data were analyzed using N-gain. The results showed that the average scores before using the digital module at 3 SMA in Surakarta residency were 53, 58, and 60 respectively, while the average scores after using the digital module were 73, 74, and 75. Based on the N gain value, the increase in ability students' cognitive belonged to the medium category, namely > 0.3. The digital module has a significant effect on improving students' cognitive abilities in Newton's Law material. © 2021 Institute of physics Publishing. All rights reserved.

关键词： Students

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Analysis of science process skill in high school students 6

Analysis of science process skill in high school students

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6th International Conference on Mathematics, Science, and Education, ICMSE 2019

作者： Atush Sholihah, N.A. Sarwanto Aminah, N.S. Physics Education Post Graduate Program Sebelas Maret University Indonesia

Science Process Skills (SPS) are all scientific skills used to acquire, develop, and apply scientific concepts and theories. Mastery of Science Process Skills is not only useful in science learning but also for the daily life of students. This study aims to obtain a profile analysis of students' science process skills. The research method used is a survey method with research subjects, namely at 4 Madiun state Senior High School. Data collection technique used is the test technique. The data obtained were then analyzed by simple statistical analysis. Based on the results of the research that has been done, it can be seen that the ability of Science Process Skills in 4 Madiun state Senior High School students as a for each aspect of Science Process Skills is still low with a percentage of 47%. © Published under licence by IOP Publishing Ltd.

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The Effect of ZnO and TiO2with Natural Dye of Broccoli (Brassia oleracea var. italica) on Dye-Sensitized Solar Cell (DSSC) 2

The Effect of ZnO and TiO2with Natural Dye of Broccoli (Bras...

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2nd International Conference on Science Education and Technology, ICOSETH 2020

作者： Cari, C. Kurniawan, Deny Supriyanto, Agus Physics Department Post Graduate Program Sebelas Maret University Jl. Ir. Sutami 36A Kentingan Jebres Surakarta57126 Indonesia

Zinc oxide having the chemical formula ZnO, while titanium dioxide is titanium oxide having the chemical formula TiO2. Zinc oxide and titanium dioxide are inorganic compounds. Zno and TiO2 are often used for Dye-Sensitized Solar Cell (DSSC). This research was conducted by mixing ZnO and TiO2 as photoanodes. The mixture of ZnO and TiO2 is made by mixing ZnO and TiO2 with a ratio of 1:1, 1:2, 1:3 then dissolved in ethanol. The natural dye used is broccoli extract (Brassia oleracea var. italica). Fabrication is carried out using FTO glass with a work area of 1cm 1cm. The efficiency results obtained by nanocomposite ZnO/TiO2 (1:1) with an efficiency (η) of 0.07180%, nanocomosite ZnO/TiO2 (1:2) with an efficiency (η) of 0,1555% nanocomosite ZnO/TiO2 (1:3) with an efficiency (η) of 0.1713%. When compared to the efficiency using ZnO/TiO2 (1:1) with TiO2, the efficiency increased by 0.002%. At ZnO/TiO2 (1:2) the efficiency increased by 0.0886%. Whereas at ZnO/TiO2 (1:3) the efficiency increased by 0.1023%. © Published under licence by IOP Publishing Ltd.

关键词： Titanium dioxide

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