scholarly journals Methodology Of Using A Virtual Laboratory To Determine The Breaking Indication Of The Environment (Glass)

2021 ◽  
Vol 03 (04) ◽  
pp. 584-587
Author(s):  
Kodirova Khamida Nurmuhamadovna ◽  
Keyword(s):  
Refractive Index ◽  
Virtual Laboratory ◽  
Laboratory Work ◽  
Theoretical Knowledge ◽  
Angle Of Incidence ◽  
The Creation

The article describes the creation and use of virtual laboratory work to determine the refractive index of the medium (glass), the ability of students to observe the process in this virtual laboratory work, the angle of incidence of light, the refractive index of the first medium ideas on how to reinforce the theoretical knowledge gained and qualify, along with the construction of error values on the screen.

scholarly journals СИСТЕМИ ВІРТУАЛЬНИХ ЛАБОРАТОРНИХ РОБІТ З БІОФІЗИКИ ЯК ЗАСОБИ РЕАЛІЗАЦІЇ ПРИНЦИПУ ПРОФЕСІЙНОЇ СПРЯМОВАНОСТІ НАВЧАННЯ СТУДЕНТІВ

2019 ◽  
Vol 70 (2) ◽  
pp. 141
Author(s):  
Liudmyla P. Sukhovirska ◽  
Olha M. Lunhol ◽  
Oksana V. Zadorozhna
Keyword(s):  
Heart Surgery ◽  
Open Heart Surgery ◽  
Educational Process ◽  
Virtual Learning Environment ◽  
Virtual Laboratory ◽  
Laboratory Work ◽  
Perfusion System ◽  
Software Products ◽  
Biological Physics ◽  
The Creation

The article substantiates expediency and shows the possibility of computer modeling of laboratory works on medical and biological physics for students in the field of training 1201 «Medicine» in the study of the discipline «Medical and Biological Physics». On the example of the laboratory work «Study of the fundamentals of hemodynamics using the apparatus «Perfusion System SORIN C5», the main stages and principles of the creation of virtual laboratory works for institutions of higher medical education were determined. The authors analyze the scientific and methodical literature on the use of specialized software products for reproduction and demonstration of various physical phenomena, the development of virtual laboratories and their implementation in the educational process of higher education institutions. The paper proposes methodical recommendations for the creation of virtual laboratory work in the classes on medical and biological physics for students in the field of training 1201 «Medicine». The article describes the main structural units (menus and submenus), the characteristics and possibilities of using the software developed by the authors in the educational process, which virtually realizes the main stages of the patient's preparation for open heart surgery using the heart-lung machine SORIN C5. The advantages of conducting virtual laboratory works on hemodynamics have been determined, as well as an analysis of educational material with the aim of improving the professional component of medical students' training and their informational and subject competencies. The possibilities of creation a series of laboratory works with their subsequent placement in the virtual learning environment «System of medical and biological physics laboratory works» are considered. Thanks to the leadership of the Municipal Institution «Regional Cardiology Center» (Kropyvnytskyi) for the assistance and provision of information on the work of the apparatus «Perfusion System SORIN C5».

PRÁTICA LABORATORIAL DE PESQUISA SEDIMENTOLÓGICA

2019 ◽  
Vol 21 (2) ◽  
pp. 218-226
Author(s):  
Alyne Karollayne Melquiades Souza Silva ◽  
Joanderson Fernandes Simões ◽  
Júlio César Reis Silva ◽  
Amanda Cristina Dias Lima ◽  
Marcelo Santos Chaves ◽  
...  
Keyword(s):  
Undergraduate Students ◽  
Experimental Research ◽  
Laboratory Experiments ◽  
Rio Grande ◽  
Physical Geography ◽  
Laboratory Work ◽  
Theoretical Knowledge ◽  
Laboratory Experience

Esta pesquisa teve como finalidade relatar experiências em laboratório, especificamente o Laboratório de Geografia Física - Pesquisa (LabGeoFis-Pesquisa), localizado no Departamento de Geografia, no Centro de Ciências Humanas, Letras e Artes, da Universidade Federal do Rio Grande do Norte. Procuramos relatar, de forma concisa, as principais técnicas aplicadas ao trabalho laboratorial, enfatizado a temática da Geografia Física. Para tecer essas considerações, nos fundamentamos em autores como Venturi (2005) e Rudio (1990), os quais tratam sobre teorias e procedimentos relacionados às práticas de laboratório e a pesquisa descritiva e experimental, respectivamente. Para realizar esta pesquisa, levamos em consideração os trabalhos e as experiências desenvolvidas pelos alunos de bacharelado e licenciatura do primeiro período do curso de Geografia. Os resultados aqui obtidos, nos mostraram a importância dos conhecimentos teóricos aliados com a prática de laboratório.Palavras chaves: Laboratório; Experiência; Técnicas. ABSTRACT This research had the purpose of reporting laboratory experiments, specifically the Laboratory of Physical Geography - Research (LabGeoFis-Search), located in the Department of Geography, at the Humanities, Letters and Arts Center of the Federal University of Rio Grande do Norte. We try to report, in a concise way, the main techniques applied to laboratory work, emphasizing the theme of Physical Geography. In order to make these considerations, we base ourselves on authors such as Venturi (2005) and Rudio (1990), who deal with theories and procedures related to laboratory practices and descriptive and experimental research, respectively. To carry out this research, we take into account the work and experiences developed by the baccalaureate and undergraduate students of the first period of the Geography course. The results obtained here showed us the importance of theoretical knowledge allied with laboratory practice.Keywords: Laboratory; Experience; Technique. RESUMENEl propósito de esta investigación fue reportar experimentos de laboratorio, específicamente el Laboratorio de Investigación de Geografía Física (LabGeoFis-Pesquisa), ubicado en el Departamento de Geografía, en el Centro de Humanidades, Letras y Artes, Universidad Federal de Río Grande del Norte.

Industrial production of galenic and new galenic preparations

2021 ◽  
Author(s):  
Ani Dadayan
Keyword(s):  
Industrial Production ◽  
Pharmaceutical Chemistry ◽  
Laboratory Work ◽  
Theoretical Knowledge ◽  
Modern Methods ◽  
The Subject ◽  
Experimental Skills

The manual is intended for students of "Pharmacy", "Pharmaceutical Chemistry" specialties of YSU Institute of Pharmacy. It corresponds to the curriculum of the subject of armtechnology (factory) and is intended for the organization of laboratory work. The educational manual presents the general characteristics of galenic and new galenic medicines, modern methods of industrial production, at the end of each topic are test tasks and situational problems. It will contribute to the strengthening of students' theoretical knowledge and experimental skills on the topic of galenic and new galenic medicines.

Virtual Laboratory Work for Discovering Gas Solubility in Water

2018 ◽  
pp. 281-297
Author(s):  
Göran Karlsson
Keyword(s):  
Laboratory Experiment ◽  
Scientific Reasoning ◽  
Virtual Laboratory ◽  
Laboratory Work ◽  
Design Experiment ◽  
Gas Solubility ◽  
Solubility In Water ◽  
Hands On ◽  
Solubility Of Gases

Compared to hands-on experiments, virtual laboratory work has the advantage of being both more cost- and time-effective, but also invokes questions about its explorative capacities. The aim of this chapter is to study how students' scientific reasoning was contingent on altered guiding structures within a virtual laboratory experiment. The virtual laboratory was developed through a design experiment involving three successive versions with altered guiding structures. Analysis of 12 dyads' reasoning about gas solubility in water revealed that the problem was not primarily for the students to realize how the volume of gas changed, but rather to understand the concept of solubility of gases. It was also observed how the guiding structures within each version influenced the students' reasoning about the studied phenomenon in certain trajectories.

Students' Joint Reasoning about Gas Solubility in Water in Modified Versions of a Virtual Laboratory

2015 ◽  
Vol 5 (4) ◽  
pp. 67-77
Author(s):  
Göran Karlsson
Keyword(s):  
Conceptual Understanding ◽  
Virtual Laboratory ◽  
Laboratory Work ◽  
Scientific Concept ◽  
Design Experiment ◽  
Gas Solubility ◽  
Natural Phenomena ◽  
Solubility In Water ◽  
Physiological Conditions ◽  
Virtual Laboratories

Laboratory work in science education is essential for students' conceptual understanding of natural phenomena. Computer-simulated laboratory experiments have been proposed to facilitate traditional laboratory work. A virtual laboratory was designed to enable students to collaboratively discover the concept of gas solubility in water at different physiological conditions. The virtual laboratory was developed through a design experiment involving three successive versions with different guiding structures. Analysis of 12 dyads' reasoning about gas solubility in water revealed that the problem was not primarily for the students to realise how the volume of gas changed, but rather to understand the concept of solubility of gases. It was also observed how the guiding structures within the three different versions influenced the students' reasoning about the concept. The analysis indicates that the affordances of virtual laboratories might, to a certain extent, enhance joint discovery of a scientific concept.

Nonlinear effects in photonic crystal fibers filled with nematic liquid crystals

Open Physics ◽  
2008 ◽  
Vol 6 (3) ◽  
Author(s):  
Urszula Laudyn ◽  
Katarzyna Rutkowska ◽  
Robert Rutkowski ◽  
Mirosław Karpierz ◽  
Tomasz Woliński ◽  
...  
Keyword(s):  
Refractive Index ◽  
Liquid Crystals ◽  
Photonic Crystal ◽  
Low Power ◽  
Light Beam ◽  
Photonic Crystal Fibers ◽  
Nematic Liquid Crystals ◽  
Nonlinear Effects ◽  
The Creation ◽  
Crystal Fibers

AbstractWe have investigated the nonlinear propagation of light in photonic crystal fibers filled with nematic liquid crystals. We analyzed a configuration with a periodic modulation of the refractive index corresponding to a matrix of waveguides. Matrices of coupled waveguides allow observing a variety of new phenomena both for low power light beam propagation and with an existence of nonlinear effects. The opportunity for the creation of solitary waves caused by the interplay between diffraction and nonlinear effects in these kinds of fibers is investigated. At low power the propagating light beam spreads as it couples to more and more waveguides. When the intensity is increased the light modifies the refractive index distribution, inducing a defect in the periodic structure. The creation of such a defect can lead to a situation in which the light becomes self-localized and its diffractive broadening is eliminated. Eventually, in the case of positive Kerr-type nonlinearity, a discrete soliton can be created. In the case of negative nonlinearity the refractive index decreases with the optical power and can lead to bandgap shifting. The incident beam, with a frequency initially within the bandgap, is then turned outside the bandgap resulting in the changing of the propagation effect for the discrete diffraction effect. As a consequence the delocalization of the light can be observed.

The propagation of electromagnetic waves in a stratified medium

1929 ◽  
Vol 25 (1) ◽  
pp. 97-120 ◽  
Author(s):  
D. R. Hartree
Keyword(s):  
Refractive Index ◽  
Reflection Coefficient ◽  
Electromagnetic Waves ◽  
Stratified Medium ◽  
Simple Extension ◽  
Angle Of Incidence ◽  
First Approximation ◽  
Special Cases ◽  
Cartesian Coordinate ◽  
The Given

The equations of propagation of electromagnetic waves in a stratified medium (i.e. a medium in which the refractive index is a function of one Cartesian coordinate only—in practice the height) are obtained first from Maxwell's equations for a material medium, and secondly from the treatment of the refracted wave as the sum of the incident wave and the wavelets scattered by the particles of the medium. The equations for the propagation in the presence of an external magnetic field are also derived by a simple extension of the second method.The significance of a reflection coefficient for a layer of stratified medium is discussed and a general formula for the reflection coefficient is found in terms of any two independent solutions of the equations of propagation in a given stratified medium.Three special cases are worked out, for waves with the electric field in the plane of incidence, viz.(1) A finite, sharply bounded, medium which is “totally reflecting” at the given angle of incidence.(2) Two media of different refractive index with a transition layer in which μ2 varies linearly from the value in one to the value in the other.(3) A layer in which μ2 is a minimum at a certain height and increases linearly to 1 above and below, at the same rate.For cases (2) and (3) curves are drawn showing the variation of reflection coefficient with thickness of the stratified layer.Case (3) may be of some importance as a first approximation to the conditions in the Heaviside layer.

scholarly journals Measurement Data Collection Device Based on ESP32 for Digital Laboratory

2021 ◽  
Vol 4 (4) ◽  
Author(s):  
Ivan A. Khyzhniak
Keyword(s):  
Data Transfer ◽  
Positive Impact ◽  
Measurement Data ◽  
Educational Process ◽  
Ease Of Use ◽  
Laboratory Work ◽  
Collection Device ◽  
The Creation ◽  
User Friendly ◽  
Digital Training

The potential use of digital laboratories is constantly growing every year, as such a device allows you to conduct research in such fields as biology, physics, chemistry and other natural sciences. It is proved that the use of modern equipment increases the efficiency of laboratory classes in schools. Today, there are a large number of educational digital laboratories, which find many areas of use, from laboratory work at school to laboratories at universities. However, if you analyze these digital labs, you can see that they do not have a user-friendly interface and settings. The purpose of this work is to review existing solutions, as well as find solutions to create an improved version of digital training laboratories. The main disadvantage of existing solutions is the lack of data transfer via Wi-Fi or Bluetooth, as well as connection to a computer or smartphone, which could significantly improve the process of working with such a device. One of the solutions to this problem is the creation of digital training laboratories based on the ESP-32 microcontroller. After analyzing the existing digital laboratories, we can conclude that this area needs improvement, as existing technologies allow to create much better devices in terms of ease of use and opportunities for educational purposes. Bluetooth and Wi-Fi are the main elements, the addition of which will significantly improve digital laboratories. One such solution is the ESP-32 microcontroller, as it includes these modules, and its technical characteristics allow you to create a device that will collect data simultaneously from many connected sensors. The creation of a digital laboratory with such characteristics will significantly improve the process of laboratory work in schools and universities, as well as allow more organized distance learning online, which will have a positive impact on the educational process in schools and universities.

scholarly journals Narrowband perfect metasurface absorber based on impedance matching

2020 ◽  
Vol 12 (3) ◽  
pp. 88
Author(s):  
Muhammad Ali Butt ◽  
Nikolai Lvovich Kazansky
Keyword(s):  
Refractive Index ◽  
Optical Materials ◽  
Near Infrared ◽  
Impedance Matching ◽  
Gold Layer ◽  
Perfect Absorber ◽  
Angle Of Incidence ◽  
Refractive Index Sensing ◽  
Sensing Applications ◽  
Metal Insulator Metal

We presented a numerical investigation of a metamaterial narrowband perfect absorber conducted via a finite element method based on commercially available COMSOL software. The periodic array of silicon meta-atoms (MAs) are placed on 80 nm thick gold layer. The broadband light at normal incidence is blocked by the gold layer and silicon MAs are used to excite the surface plasmon by scattering light through it. Maximum absorption of 95.7 % is obtained at the resonance wavelength of 1137.5 nm due to the perfect impedance matching of the electric and magnetic dipoles. The absorption is insensitive to the wide-angle of incidence ranging from 0 to 80 degrees. We believe that the proposed metamaterial device can be utilized in solar photovoltaic and biochemical sensing applications. Full Text: PDF ReferencesY. Cheng, X.S. Mao, C. Wu, L. Wu, R.Z. Gong, "Infrared non-planar plasmonic perfect absorber for enhanced sensitive refractive index sensing", Optical Materials, 53, 195-200 (2016). CrossRef S. S. Mirshafieyan, D.A. Gregory, "Electrically tunable perfect light absorbers as color filters and modulators", Scientific Reports,8, 2635 (2018). CrossRef D.M. Nguyen, D. Lee, J. Rho, "Control of light absorbance using plasmonic grating based perfect absorber at visible and near-infrared wavelengths", Scientific Reports, 7, 2611 (2017). CrossRef Y. Sun, Y. Ling, T. Liu, L. Huang, "Electro-optical switch based on continuous metasurface embedded in Si substrate", AIP Advances, 5, 117221 (2015). CrossRef H. Chu, Q. Li, B. Liu, J. Luo, S. Sun, Z. H. Hang, L. Zhou, Y. Lai, "A hybrid invisibility cloak based on integration of transparent metasurfaces and zero-index materials", Light: Science & Applications, 7, 50 (2018). CrossRef S. K. Patel, S. Charola, J. Parmar, M. Ladumor, "Broadband metasurface solar absorber in the visible and near-infrared region", Materials Research Express, 6, 086213 (2019). CrossRef Q. Qian, S. Ti, C. Wang, "All-dielectric ultra-thin metasurface angular filter", Optics Letters, 44, 3984 (2019). CrossRef P. Yu et al., "Broadband Metamaterial Absorbers", Advanced Optical Materials, 7, 1800995 (2019). CrossRef Y. J. Kim et al., "Flexible ultrathin metamaterial absorber for wide frequency band, based on conductive fibers", Science and Technology of advanced materials, 19, 711-717 (2018). CrossRef N.L. Kazanskiy, S.N. Khonina, M.A. Butt, "Plasmonic sensors based on Metal-insulator-metal waveguides for refractive index sensing applications: A brief review", Physica E, 117, 113798 (2020). CrossRef H. E. Nejad, A. Mir, A. Farmani, "Supersensitive and Tunable Nano-Biosensor for Cancer Detection", IEEE Sensors Journal, 19, 4874-4881 (2019). CrossRef

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