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  1. Article ; Online: Assessing students' knowledge of the concept of science and scientific exploration and its relationship with understanding a physical concept (mass)

    N. Basiri / F. Ahmadi / M. Neek-Amal

    Fanāvarī-i āmūzish, Vol 15, Iss 3, Pp 519-

    2021  Volume 530

    Abstract: Background and Objective: Today, a positivist one-dimensional view of science, where it considers scientific propositions to be objective, definite, and fixed, is not credible enough, and the interdisciplinary and multidimensional nature of science is ... ...

    Abstract Background and Objective: Today, a positivist one-dimensional view of science, where it considers scientific propositions to be objective, definite, and fixed, is not credible enough, and the interdisciplinary and multidimensional nature of science is considered. Science is a human endeavor to explain natural phenomena that require interdisciplinary knowledge. The product of this effort, in which people from all cultures and branches of science participate, is scientific knowledge. This knowledge is based on empirical evidence, rational reasoning, and skepticism; and while it is enduring, it is transient and temporary. Over the past century, the debate over the definition of science and how science works has given rise to the realm of the "nature of science." The nature of science is a common issue in the philosophy, history, sociology, and psychology of science that addresses questions such as science and how it works. Scientists respond to how society functions as a group and how society and science interact. In this field, various components such as observation and inference, transience and temporality, imagination and creativity, society and culture, laws and theories in science and multiple scientific methods are studied, which are referred to as "components of the nature of science". In this article, with a descriptive-survey design and with a quantitative approach of science students, "students' understanding of science and scientific exploration" was assessed. Methods: The population consisting of second and third year undergraduate physics students of Tehran and Isfahan universities was considered. A statistical sample consisting of 4 classes from two universities was available. A questionnaire for students' understanding of science and scientific exploration was provided to students. Data were analyzed by one-sample t-test and correlation coefficient. Findings: The results showed that the assessed students have an incomplete understanding of the components of the nature of science. There is a ...
    Keywords science education ; science components ; internet for science education ; Special aspects of education ; LC8-6691
    Subject code 501
    Language Persian
    Publishing date 2021-06-01T00:00:00Z
    Publisher Shahid Rajaee Teacher Training University (SRTTU)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: The effects of temperature and vacancies on dynamics of crack in graphene sheet

    A. Lohrasebi / M. Amini / M. Neek-Amal

    AIP Advances, Vol 4, Iss 5, Pp 057113-057113-

    2014  Volume 8

    Abstract: Crack propagation in a defected graphene sheet is investigated at finite temperature using molecular dynamics simulation. The effects of several initial cracks, temperature and different percentage of vacancies are considered. It is found that i) the ... ...

    Abstract Crack propagation in a defected graphene sheet is investigated at finite temperature using molecular dynamics simulation. The effects of several initial cracks, temperature and different percentage of vacancies are considered. It is found that i) the critical load, which is a criteria for crack propagation, is larger when the load is applied on the zigzag direction, ii) the critical load decreases with increasing temperature, iii) a hole in the center of the sheet and the presence of randomly distributed vacancies reduce the critical load giving different crack propagation trajectory. Our new results would help to understand the crack propagation phenomena in defected graphene at finite temperature.
    Keywords Science (General) ; Q1-390 ; Science ; Q ; Physics ; QC1-999
    Language English
    Publishing date 2014-05-01T00:00:00Z
    Publisher AIP Publishing LLC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Dependence of the shape of graphene nanobubbles on trapped substance

    H. Ghorbanfekr-Kalashami / K. S. Vasu / R. R. Nair / François M. Peeters / M. Neek-Amal

    Nature Communications, Vol 8, Iss 1, Pp 1-

    2017  Volume 11

    Abstract: Graphene nanobubbles can act as enclosures for holding small volumes of substances. Here the authors find a correlation between bubble shape and the encapsulated material providing a potential method for determining the graphene bubble content by its ... ...

    Abstract Graphene nanobubbles can act as enclosures for holding small volumes of substances. Here the authors find a correlation between bubble shape and the encapsulated material providing a potential method for determining the graphene bubble content by its deformation.
    Keywords Science ; Q
    Language English
    Publishing date 2017-06-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Van der Waals pressure and its effect on trapped interlayer molecules

    K. S. Vasu / E. Prestat / J. Abraham / J. Dix / R. J. Kashtiban / J. Beheshtian / J. Sloan / P. Carbone / M. Neek-Amal / S. J. Haigh / A. K. Geim / R. R. Nair

    Nature Communications, Vol 7, Iss 1, Pp 1-

    2016  Volume 6

    Abstract: Molecules trapped between the layers of two-dimensional materials are thought to experience high pressure. Here, the authors report measurements of this interfacial pressure by capturing pressure-sensitive molecules and studying their structural changes, ...

    Abstract Molecules trapped between the layers of two-dimensional materials are thought to experience high pressure. Here, the authors report measurements of this interfacial pressure by capturing pressure-sensitive molecules and studying their structural changes, and show that it can also induce chemical reaction.
    Keywords Science ; Q
    Language English
    Publishing date 2016-07-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article: Multilayer graphene, Moiré patterns, grain boundaries and defects identified by scanning tunneling microscopy on the m-plane, non-polar surface of SiC

    Xu, P / D. Qi / J.K. Schoelz / J. Thompson / P.M. Thibado / V.D. Wheeler / L.O. Nyakiti / R.L. Myers-Ward / C.R. Eddy / D.K. Gaskill / M. Neek-Amal / F.M. Peeters

    Carbon. 2014 Dec., v. 80

    2014  

    Abstract: Epitaxial graphene is grown on a non-polar n+ 6H-SiC m-plane substrate and studied using atomic scale scanning tunneling microscopy. Multilayer graphene is found throughout the surface and exhibits rotational disorder. Moiré patterns of different ... ...

    Abstract Epitaxial graphene is grown on a non-polar n+ 6H-SiC m-plane substrate and studied using atomic scale scanning tunneling microscopy. Multilayer graphene is found throughout the surface and exhibits rotational disorder. Moiré patterns of different spatial periodicities are found, and we found that as the wavelength increases, so does the amplitude of the modulations. This relationship reveals information about the interplay between the energy required to bend graphene and the interaction energy, i.e. van der Waals energy, with the graphene layer below. Our experiments are supported by theoretical calculations which predict that the membrane topographical amplitude scales with the Moiré pattern wavelength, L as L-1+αL-2.
    Keywords energy ; graphene ; scanning tunneling microscopy ; silicon carbide ; van der Waals forces ; wavelengths
    Language English
    Dates of publication 2014-12
    Size p. 75-81.
    Publishing place Elsevier Ltd
    Document type Article
    ISSN 0008-6223
    DOI 10.1016/j.carbon.2014.08.028
    Database NAL-Catalogue (AGRICOLA)

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