Meta materials are advance materials with negative refractive index, they show excellent applications like cloaking effect, super lens, WMD detectors also flying doughnut etc. They are very futuristic . This presentation explains the basic definition, history, scientific principle and its applications etc.
The Novel Study of Metamaterial and Its AspectsYogeshIJTSRD
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Stealth knowledge is used to make the object less observable and is defined in terms of absorption of electromagnetic waves that is an important research area used in defence research. Radar cross section is the proportion of the objectives capacity to reflect radar signals toward the radar beneficiary. Some techniques such as shaping, radar absorbing material RAM , passive cancellation and active cancellation have been used for RCS reduction purposes. For a long time, radar absorbing material RAM has been actively pursued. For RAM weight, design, thickness, mechanical strength and absorptivity are key factors and therefore in the development of RAM, there is a trade off between weight and thickness of absorber material. Along with this, an alternative to RAM is RAS and metamaterial are one of the possible options. The metamaterial is lightweight and easy to use. The Stealth property of metamaterial is based on material property i.e., permittivity and permeability of material varying from small positive to large negative values at a particular frequency. In this paper, we hada novel study of metamaterial and its various aspects. Manish Verma | SM Abbas "The Novel Study of Metamaterial and Its Aspects" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-5 , August 2021, URL: https://www.ijtsrd.com/papers/ijtsrd43731.pdf Paper URL: https://www.ijtsrd.com/physics/engineering-physics/43731/the-novel-study-of-metamaterial-and-its-aspects/manish-verma
This paper focuses on the numerous techniques that
have been proposed over the years for metamaterial
characterization. These techniques are categorized into
analytical, field averaging and experimental methods, which
provide various methods to determine the complex permittivity,
complex permeability and refractive index of metamaterials.
The outstanding properties of metamaterials open the door of opportunity for a number of exciting practical applications. Fascinating applications such as: perfect lenses that break the diffraction limit of conventional lenses, optical quantum storage, and invisibility cloaking.
Meta materials are advance materials with negative refractive index, they show excellent applications like cloaking effect, super lens, WMD detectors also flying doughnut etc. They are very futuristic . This presentation explains the basic definition, history, scientific principle and its applications etc.
The Novel Study of Metamaterial and Its AspectsYogeshIJTSRD
Â
Stealth knowledge is used to make the object less observable and is defined in terms of absorption of electromagnetic waves that is an important research area used in defence research. Radar cross section is the proportion of the objectives capacity to reflect radar signals toward the radar beneficiary. Some techniques such as shaping, radar absorbing material RAM , passive cancellation and active cancellation have been used for RCS reduction purposes. For a long time, radar absorbing material RAM has been actively pursued. For RAM weight, design, thickness, mechanical strength and absorptivity are key factors and therefore in the development of RAM, there is a trade off between weight and thickness of absorber material. Along with this, an alternative to RAM is RAS and metamaterial are one of the possible options. The metamaterial is lightweight and easy to use. The Stealth property of metamaterial is based on material property i.e., permittivity and permeability of material varying from small positive to large negative values at a particular frequency. In this paper, we hada novel study of metamaterial and its various aspects. Manish Verma | SM Abbas "The Novel Study of Metamaterial and Its Aspects" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-5 , August 2021, URL: https://www.ijtsrd.com/papers/ijtsrd43731.pdf Paper URL: https://www.ijtsrd.com/physics/engineering-physics/43731/the-novel-study-of-metamaterial-and-its-aspects/manish-verma
This paper focuses on the numerous techniques that
have been proposed over the years for metamaterial
characterization. These techniques are categorized into
analytical, field averaging and experimental methods, which
provide various methods to determine the complex permittivity,
complex permeability and refractive index of metamaterials.
The outstanding properties of metamaterials open the door of opportunity for a number of exciting practical applications. Fascinating applications such as: perfect lenses that break the diffraction limit of conventional lenses, optical quantum storage, and invisibility cloaking.
Analysis of Metamaterial Based Microstrip Array Antennaijceronline
Â
Metamaterials have been intensively researched due to their peculiar features such as negative permittivity and/or permeability and ultra-refraction phenomenon. To satisfy the demand of commonly used wireless communication systems, an antenna which can operate at higher frequencies and enhanced characteristics are desirable. The arrangement of all elements is done that they provide an improvement in bandwidth, directivity return loss etc. The frequency response of a metamaterial can be tailored by varying its characteristics. A new metamaterial structure using square and ring split ring resonator is proposed. Using this metamaterial structure, a microstrip patch antenna is designed with enhanced characteristics such as reduction in return lossfrom-20dB to -36dB with tunability is achieved.
This ppt give an idea about what metamaterial is? how are they formed? and introduces to the techniques to analyze them. A few applications of metamaterials are also mentioned.
Study of highly broadening Photonic band gaps extension in one-dimensional Me...IOSR Journals
Â
In this paper, we show theoretically that the reflectance spectra of one dimensional multilayer metal-organic periodic structure (1D MOPS) can be enhanced due to the addition of the organic constituents. We have used simple transfer matrix method to calculate the absorption, transmittance and reflectance of the 1D MOPS systems. The organic component like N,Nâ-bis-(1-naphthyl)-N,Nâdiphenyl-1; 1biphenyl-4; 4diamine (NPB) absorbs the light in ultra-violet, visible and infrared electromagnetic region and the structure with Ag-metal also having the tendency to absorb the light by the plasmaonic action and their refractive can be calculated from Drude equation. The reflectance spectra of multilayer 1D MOPS containing a variable number periodic of Ag/N,Nâ-bis-(1-naphthyl)-N,Nâdiphenyl-1; 1biphenyl-4; 4diamine (NPB) structure are calculated taking optical constant of NPB and Ag. The optical band gap and reflectance spectra of 1D MOPS of the considered structure is obtained in the visible and near infrared regions either with the variation of the metal layer thickness or thickness of the organic layer. From the results under investigation through TMM, tunability in the optical band gap was observed either change in thickness of the other layer 1/ or 2 or the angle of the incident. Due to optical absorption of the light in the different region of electromagnetic spectrum due to either N,Nâ-bis-(1-naphthyl)-N,Nâdiphenyl-1; 1biphenyl-4; 4diamine (NPB) or silver metal, the optical band gap of 1DMOPS shows the shift of band edges of λL and λR from ultra-violet to visible and the infrared with change the optical constant.
Recent Developments and Analysis of Electromagnetic Metamaterial with all of ...IOSR Journals
Â
Abstract: Recent advances in metamaterials (MMs) research have highlighted the possibility to create novel
devices with electromagnetic functionality. The metamaterial have the power which can easily construct
materials with a user-designed EM response with a particular target frequency. This is the important
phenomena of THz frequency region that can make a considerable progress in design fabrication, and define the
characteristics of MMs at THz frequencies. This article illustrates the latest advancements of THz MMs
research.
Key word: Metamaterials (MMs), Terahertz (THz).
Recent Developments and Analysis of Electromagnetic Metamaterial with all of ...IOSR Journals
Â
Recent advances in metamaterials (MMs) research have highlighted the possibility to create novel
devices with electromagnetic functionality. The metamaterial have the power which can easily construct
materials with a user-designed EM response with a particular target frequency. This is the important
phenomena of THz frequency region that can make a considerable progress in design fabrication, and define the
characteristics of MMs at THz frequencies. This article illustrates the latest advancements of THz MMs
research.
Recent Developments and Analysis of Electromagnetic Metamaterial with all of ...IOSR Journals
Â
Abstract: Recent advances in metamaterials (MMs) research have highlighted the possibility to create novel devices with electromagnetic functionality. The metamaterial have the power which can easily construct materials with a user-designed EM response with a particular target frequency. This is the important phenomena of THz frequency region that can make a considerable progress in design fabrication, and define the characteristics of MMs at THz frequencies. This article illustrates the latest advancements of THz MMs research. Key word: Metamaterials (MMs), Terahertz (THz).
Calculation of Optical Properties of Nano ParticlePHYSICS 5535- .docxRAHUL126667
Â
Calculation of Optical Properties of Nano Particle
PHYSICS 5535- Optical Properties Matter-Spring 2017
Raznah Yami
Outline
1. Introduction: this part gives a precise overview of the whole paper. It begins by illustrating a brief introduction and importance of Nano Particles and the theoretical approaches used for their calculation.
2. Main idea: this section provides a step-by-step in-depth analysis of recently developed theories the calculation of optical properties of nanoparticles. It also provides calculation and equations employed these approaches.
2.1 Optical Properties of Nanoparticles: this section talks about the basics principles and governing the optical behavior of Nano particles and provides in-depth knowledge of different phenomena observed while dealing with optical properties of Nano particles.
2.2 Mie-Theory: the research provides exhaustive information the study optical properties of nanoparticles using Mie theory. This research focuses on Mie theory for the calculation of optical properties of Nano particle according to which we can calculate the place of surface Plasmon resonance in optical spectra of metallic spherical nanoparticle.
2.3 Discrete Dipole Approximation method: this section enumerates sufficient information about the calculation of absorption and scattering efficiencies and optical resonance wavelengths for three commonly used classes of nanoparticles: gold Nano spheres, silica-gold Nano shells, and gold Nano rods and we examine the magneto-optical scattering from nanometer-scale structures using a discrete dipole approximation.
3. Conclusion: This section provides a summary of the most important points, which presents an overview of the practical application and calculation methods of optical properties of Nano particles talking about core principles, which therefore explain the behavior exhibited by nanoparticles.
List of figures:
Figure 1: Localized surface Plasmon resonance ,resulting from the collective oscillations of delocalized electrons in response to an external electric field
Figure 2: Absorption spectra of semiconductor nanoparticles of different diameter. Right-nanoparticles suspended in solution.
Figure 3: Comparison of absorbance along increasing wavelength between Nano GaAs (7-15 nm) and Bulk GaAs showing an apparent blue shift
Figure 4: Showing the effect of blue shift because of quantum confinement as the wavelength shifts from 1100 nm to 2000 nm when we move from particle size of 9nm to parcile size of 3 nm.
Figure 5: Emission spectra of several sizes of (Cdse) Zns core-shell quantum dots.
Figure 6: The optical spectra and transmission electron micrographs for the particles in vials 1â5 are also shown. Scale bars in micrographs are all 100 nm
Figure7: Shows the effect of varying relative core and shell thickness of gold Nano Shells, there is an apparent blue shift as the frequency increases
References:
1. . P. S. Per ...
Computations of Acoustic Wave Propagation in II-VI Hexagonal Semiconductor Compounds
Original Research Article
Journal of Chemistry and Materials Research Vol. 1 (3), 2014, 65â70
Pramod Kumar Yadawa *
Performance Enhancement of Wideband Reflectarray Antennas Embedded on Paper S...TELKOMNIKA JOURNAL
Â
This research presents an innovative solution to address the bandwidth limitation of microstrip
reflectarray antennas. Organic substrate materials with controlled compositions have been characterized
to be employed as substrate materials for microstrip reflectarrays. The three proposed materials show low
dielectric permittivity values of 1.81, 1.64 and 1.84 along with loss tangents of 0.053, 0.047 and 0.057
respectively. The proposed substrate materials have been verified by modelling reflectarray unit elements
in CST MWS and measured using a waveguide simulator technique. The comparison between measured
and simulated results show a good agreement with promising broadband performance of 312, 340 and
207 MHz for S1, S2 and S3 substrate materials respectively.
A Compact Multiband Metamaterial based Microstrip Patch Antenna for Wireless ...IJERA Editor
Â
In this paper, a metamaterial based compact multiband microstrip antenna is proposed which can give high gain and directivity. Metamaterials are periodic structures and have been intensively investigated due to the particular features such as ultra-refraction phenomenon and negative permittivity and/or permeability. A metamaterialbased microstrip patch antenna with enhanced characteristics and multi band operation will be investigated in this work. The multiple frequency operation will be achieved by varying the capacitance of the metamaterial structure with the help of metallic loadings placed in each metamaterial unit cells. The potential impacts will be miniaturization, reduced cost and reduced power consumption since multiple antennas operating at different frequencies are replaced by a single antenna which can operate at multiple frequencies. The proposed microstrip patch antenna will have its frequencies of operation in the L, S and C bands. The proposed structure is simulated using Agilent Advanced Design System (ADS) 2011.05. It is then fabricated on the FR4 substrate and the performance of the fabricated antenna is measured using the Vector Network Analyzer (VNA)
INSPECTION OF GFRP COMPOSITES BY MICROWAVE NDEjmicro
Â
Fiber reinforced polymer (FRP) composites form a major structural part ofaerospace and defence
applications. Non-destructive evaluation (NDE) plays an important role in assessing the quality and
health monitoring of FRP composite structures.Defect detection of FRPcomposite structures are by
different NDE techniques, such as ultrasonics, thermography, X-ray radiography. Depending on the type
of material, their characteristic features and accessibility of the test object etc. suitable techniquesare
employed. Microwave non-destructive evaluation (MWNDE) is an emerging NDE technique for
characterizing and inspecting dielectric structures. Microwave NDE finds application in the areas of
dielectric material characterization, determining thickness variation, defect detection and bond quality
inspection.Inspection of glass fiber reinforced polymer (GFRP) composites by near-field reflection
microwave NDE technique is presented in this paper. GFRP composite with known inserted defects such
as inclusion and flat bottom holes are inspected to understand and establish Microwave NDE. Results of
inspected structures by swept frequency reflection microwave NDE technique in the frequency range 8.2-
12.4GHz (X-band) and 12.4-18GHz (Ku-band) respectively are presented. The position of the reflection
characteristic curve indicates the depth of the defect in the inspected structure.
INSPECTION OF GFRP COMPOSITES BY MICROWAVE NDEjmicro
Â
Fiber reinforced polymer (FRP) composites form a major structural part ofaerospace and defence
applications. Non-destructive evaluation (NDE) plays an important role in assessing the quality and
health monitoring of FRP composite structures.Defect detection of FRPcomposite structures are by
different NDE techniques, such as ultrasonics, thermography, X-ray radiography. Depending on the type
of material, their characteristic features and accessibility of the test object etc. suitable techniquesare
employed. Microwave non-destructive evaluation (MWNDE) is an emerging NDE technique for
characterizing and inspecting dielectric structures. Microwave NDE finds application in the areas of
dielectric material characterization, determining thickness variation, defect detection and bond quality
inspection.Inspection of glass fiber reinforced polymer (GFRP) composites by near-field reflection
microwave NDE technique is presented in this paper. GFRP composite with known inserted defects such
as inclusion and flat bottom holes are inspected to understand and establish Microwave NDE. Results of
inspected structures by swept frequency reflection microwave NDE technique in the frequency range 8.2-
12.4GHz (X-band) and 12.4-18GHz (Ku-band) respectively are presented. The position of the reflection
characteristic curve indicates the depth of the defect in the inspected structure.
Analysis of Metamaterial Based Microstrip Array Antennaijceronline
Â
Metamaterials have been intensively researched due to their peculiar features such as negative permittivity and/or permeability and ultra-refraction phenomenon. To satisfy the demand of commonly used wireless communication systems, an antenna which can operate at higher frequencies and enhanced characteristics are desirable. The arrangement of all elements is done that they provide an improvement in bandwidth, directivity return loss etc. The frequency response of a metamaterial can be tailored by varying its characteristics. A new metamaterial structure using square and ring split ring resonator is proposed. Using this metamaterial structure, a microstrip patch antenna is designed with enhanced characteristics such as reduction in return lossfrom-20dB to -36dB with tunability is achieved.
This ppt give an idea about what metamaterial is? how are they formed? and introduces to the techniques to analyze them. A few applications of metamaterials are also mentioned.
Study of highly broadening Photonic band gaps extension in one-dimensional Me...IOSR Journals
Â
In this paper, we show theoretically that the reflectance spectra of one dimensional multilayer metal-organic periodic structure (1D MOPS) can be enhanced due to the addition of the organic constituents. We have used simple transfer matrix method to calculate the absorption, transmittance and reflectance of the 1D MOPS systems. The organic component like N,Nâ-bis-(1-naphthyl)-N,Nâdiphenyl-1; 1biphenyl-4; 4diamine (NPB) absorbs the light in ultra-violet, visible and infrared electromagnetic region and the structure with Ag-metal also having the tendency to absorb the light by the plasmaonic action and their refractive can be calculated from Drude equation. The reflectance spectra of multilayer 1D MOPS containing a variable number periodic of Ag/N,Nâ-bis-(1-naphthyl)-N,Nâdiphenyl-1; 1biphenyl-4; 4diamine (NPB) structure are calculated taking optical constant of NPB and Ag. The optical band gap and reflectance spectra of 1D MOPS of the considered structure is obtained in the visible and near infrared regions either with the variation of the metal layer thickness or thickness of the organic layer. From the results under investigation through TMM, tunability in the optical band gap was observed either change in thickness of the other layer 1/ or 2 or the angle of the incident. Due to optical absorption of the light in the different region of electromagnetic spectrum due to either N,Nâ-bis-(1-naphthyl)-N,Nâdiphenyl-1; 1biphenyl-4; 4diamine (NPB) or silver metal, the optical band gap of 1DMOPS shows the shift of band edges of λL and λR from ultra-violet to visible and the infrared with change the optical constant.
Recent Developments and Analysis of Electromagnetic Metamaterial with all of ...IOSR Journals
Â
Abstract: Recent advances in metamaterials (MMs) research have highlighted the possibility to create novel
devices with electromagnetic functionality. The metamaterial have the power which can easily construct
materials with a user-designed EM response with a particular target frequency. This is the important
phenomena of THz frequency region that can make a considerable progress in design fabrication, and define the
characteristics of MMs at THz frequencies. This article illustrates the latest advancements of THz MMs
research.
Key word: Metamaterials (MMs), Terahertz (THz).
Recent Developments and Analysis of Electromagnetic Metamaterial with all of ...IOSR Journals
Â
Recent advances in metamaterials (MMs) research have highlighted the possibility to create novel
devices with electromagnetic functionality. The metamaterial have the power which can easily construct
materials with a user-designed EM response with a particular target frequency. This is the important
phenomena of THz frequency region that can make a considerable progress in design fabrication, and define the
characteristics of MMs at THz frequencies. This article illustrates the latest advancements of THz MMs
research.
Recent Developments and Analysis of Electromagnetic Metamaterial with all of ...IOSR Journals
Â
Abstract: Recent advances in metamaterials (MMs) research have highlighted the possibility to create novel devices with electromagnetic functionality. The metamaterial have the power which can easily construct materials with a user-designed EM response with a particular target frequency. This is the important phenomena of THz frequency region that can make a considerable progress in design fabrication, and define the characteristics of MMs at THz frequencies. This article illustrates the latest advancements of THz MMs research. Key word: Metamaterials (MMs), Terahertz (THz).
Calculation of Optical Properties of Nano ParticlePHYSICS 5535- .docxRAHUL126667
Â
Calculation of Optical Properties of Nano Particle
PHYSICS 5535- Optical Properties Matter-Spring 2017
Raznah Yami
Outline
1. Introduction: this part gives a precise overview of the whole paper. It begins by illustrating a brief introduction and importance of Nano Particles and the theoretical approaches used for their calculation.
2. Main idea: this section provides a step-by-step in-depth analysis of recently developed theories the calculation of optical properties of nanoparticles. It also provides calculation and equations employed these approaches.
2.1 Optical Properties of Nanoparticles: this section talks about the basics principles and governing the optical behavior of Nano particles and provides in-depth knowledge of different phenomena observed while dealing with optical properties of Nano particles.
2.2 Mie-Theory: the research provides exhaustive information the study optical properties of nanoparticles using Mie theory. This research focuses on Mie theory for the calculation of optical properties of Nano particle according to which we can calculate the place of surface Plasmon resonance in optical spectra of metallic spherical nanoparticle.
2.3 Discrete Dipole Approximation method: this section enumerates sufficient information about the calculation of absorption and scattering efficiencies and optical resonance wavelengths for three commonly used classes of nanoparticles: gold Nano spheres, silica-gold Nano shells, and gold Nano rods and we examine the magneto-optical scattering from nanometer-scale structures using a discrete dipole approximation.
3. Conclusion: This section provides a summary of the most important points, which presents an overview of the practical application and calculation methods of optical properties of Nano particles talking about core principles, which therefore explain the behavior exhibited by nanoparticles.
List of figures:
Figure 1: Localized surface Plasmon resonance ,resulting from the collective oscillations of delocalized electrons in response to an external electric field
Figure 2: Absorption spectra of semiconductor nanoparticles of different diameter. Right-nanoparticles suspended in solution.
Figure 3: Comparison of absorbance along increasing wavelength between Nano GaAs (7-15 nm) and Bulk GaAs showing an apparent blue shift
Figure 4: Showing the effect of blue shift because of quantum confinement as the wavelength shifts from 1100 nm to 2000 nm when we move from particle size of 9nm to parcile size of 3 nm.
Figure 5: Emission spectra of several sizes of (Cdse) Zns core-shell quantum dots.
Figure 6: The optical spectra and transmission electron micrographs for the particles in vials 1â5 are also shown. Scale bars in micrographs are all 100 nm
Figure7: Shows the effect of varying relative core and shell thickness of gold Nano Shells, there is an apparent blue shift as the frequency increases
References:
1. . P. S. Per ...
Computations of Acoustic Wave Propagation in II-VI Hexagonal Semiconductor Compounds
Original Research Article
Journal of Chemistry and Materials Research Vol. 1 (3), 2014, 65â70
Pramod Kumar Yadawa *
Performance Enhancement of Wideband Reflectarray Antennas Embedded on Paper S...TELKOMNIKA JOURNAL
Â
This research presents an innovative solution to address the bandwidth limitation of microstrip
reflectarray antennas. Organic substrate materials with controlled compositions have been characterized
to be employed as substrate materials for microstrip reflectarrays. The three proposed materials show low
dielectric permittivity values of 1.81, 1.64 and 1.84 along with loss tangents of 0.053, 0.047 and 0.057
respectively. The proposed substrate materials have been verified by modelling reflectarray unit elements
in CST MWS and measured using a waveguide simulator technique. The comparison between measured
and simulated results show a good agreement with promising broadband performance of 312, 340 and
207 MHz for S1, S2 and S3 substrate materials respectively.
A Compact Multiband Metamaterial based Microstrip Patch Antenna for Wireless ...IJERA Editor
Â
In this paper, a metamaterial based compact multiband microstrip antenna is proposed which can give high gain and directivity. Metamaterials are periodic structures and have been intensively investigated due to the particular features such as ultra-refraction phenomenon and negative permittivity and/or permeability. A metamaterialbased microstrip patch antenna with enhanced characteristics and multi band operation will be investigated in this work. The multiple frequency operation will be achieved by varying the capacitance of the metamaterial structure with the help of metallic loadings placed in each metamaterial unit cells. The potential impacts will be miniaturization, reduced cost and reduced power consumption since multiple antennas operating at different frequencies are replaced by a single antenna which can operate at multiple frequencies. The proposed microstrip patch antenna will have its frequencies of operation in the L, S and C bands. The proposed structure is simulated using Agilent Advanced Design System (ADS) 2011.05. It is then fabricated on the FR4 substrate and the performance of the fabricated antenna is measured using the Vector Network Analyzer (VNA)
INSPECTION OF GFRP COMPOSITES BY MICROWAVE NDEjmicro
Â
Fiber reinforced polymer (FRP) composites form a major structural part ofaerospace and defence
applications. Non-destructive evaluation (NDE) plays an important role in assessing the quality and
health monitoring of FRP composite structures.Defect detection of FRPcomposite structures are by
different NDE techniques, such as ultrasonics, thermography, X-ray radiography. Depending on the type
of material, their characteristic features and accessibility of the test object etc. suitable techniquesare
employed. Microwave non-destructive evaluation (MWNDE) is an emerging NDE technique for
characterizing and inspecting dielectric structures. Microwave NDE finds application in the areas of
dielectric material characterization, determining thickness variation, defect detection and bond quality
inspection.Inspection of glass fiber reinforced polymer (GFRP) composites by near-field reflection
microwave NDE technique is presented in this paper. GFRP composite with known inserted defects such
as inclusion and flat bottom holes are inspected to understand and establish Microwave NDE. Results of
inspected structures by swept frequency reflection microwave NDE technique in the frequency range 8.2-
12.4GHz (X-band) and 12.4-18GHz (Ku-band) respectively are presented. The position of the reflection
characteristic curve indicates the depth of the defect in the inspected structure.
INSPECTION OF GFRP COMPOSITES BY MICROWAVE NDEjmicro
Â
Fiber reinforced polymer (FRP) composites form a major structural part ofaerospace and defence
applications. Non-destructive evaluation (NDE) plays an important role in assessing the quality and
health monitoring of FRP composite structures.Defect detection of FRPcomposite structures are by
different NDE techniques, such as ultrasonics, thermography, X-ray radiography. Depending on the type
of material, their characteristic features and accessibility of the test object etc. suitable techniquesare
employed. Microwave non-destructive evaluation (MWNDE) is an emerging NDE technique for
characterizing and inspecting dielectric structures. Microwave NDE finds application in the areas of
dielectric material characterization, determining thickness variation, defect detection and bond quality
inspection.Inspection of glass fiber reinforced polymer (GFRP) composites by near-field reflection
microwave NDE technique is presented in this paper. GFRP composite with known inserted defects such
as inclusion and flat bottom holes are inspected to understand and establish Microwave NDE. Results of
inspected structures by swept frequency reflection microwave NDE technique in the frequency range 8.2-
12.4GHz (X-band) and 12.4-18GHz (Ku-band) respectively are presented. The position of the reflection
characteristic curve indicates the depth of the defect in the inspected structure.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
Â
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
Â
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Operation âBlue Starâ is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
Â
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as âdistorted thinkingâ.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.