J Fernandes Hst 2009
•
0 likes•265 views
This document outlines an approach for detecting body-worn explosives using radar. It describes modeling the detection system using FDFD and simulating different configurations. An experiment is described that uses a scanning beam radar module to obtain range profiles of targets at various positions and orientations. The signal processing methods are discussed, including using limited views of the target and an ellipse fitting algorithm to classify targets as threats or non-threats based on their time response characteristics. The results show multiple ISAR image features can distinguish threats, and the ellipse algorithm was successful in most cases. Improving the aperture size and reducing phase noise could enhance the resolution and performance of the system.
Report
Share
Report
Share
Recommended
Digital Techniques For Myocardial Perfusion Spect
This document provides an overview of digital techniques for myocardial perfusion SPECT imaging. It describes SPECT equipment components like the gamma camera and workstation. It explains tomographic acquisition parameters and technical considerations. Image processing techniques are covered like filtered back projection, filtering, and iterative reconstruction. Quantitative analysis methods like bullseye displays and segmental analysis are also summarized.
Image quality, digital technology and radiation protection
1. The document discusses key factors that influence image quality for both film-based and digital radiography systems, including density, contrast, resolution, and distortion.
2. It also covers radiation exposure factors like kV, mAs, and techniques to reduce patient dose like using collimation and shields.
3. Digital radiography systems use metrics like exposure index and SNR to assess image quality rather than film density, and also allow for post-processing techniques.
Dr,system abhishek
This document provides an overview of digital radiography technologies. It discusses the key components of a digital radiography system including receptors, processing units, storage, and displays. The two main types of digital radiography detectors are direct conversion detectors, which convert x-ray energy directly into electric charge, and indirect conversion detectors, which first convert x-rays to light using a scintillator. Common scintillator materials are cesium iodide and gadolinium oxysulfide. The document also compares characteristics of scintillator-based flat panel detectors and photoconductor-based detectors using selenium. It describes digital image processing techniques such as contrast adjustment using look up tables and windowing.
Computed radiography &digital radiography
Computed radiography and direct/digital radiography are two digital imaging techniques. Computed radiography uses an imaging plate that captures x-ray data, which is then converted to a digital image. Direct digital radiography uses detectors like TFT or flat panel detectors to directly capture x-ray data digitally. Both techniques offer benefits over traditional film like faster imaging and easier sharing of images.
modulation transfer function (MTF)
The resolution and performance of an optical microscope can be characterized by a quantity known as the modulation transfer function (MTF), which is a measurement of the microscope's ability to transfer contrast from the specimen to the intermediate image plane at a specific resolution.
Digital Radiography
Digital radiography systems have replaced analog film-based systems. There are several types of digital radiography including computed radiography, scanned projection radiography, and indirect and direct digital radiography. Computed radiography uses a photostimulable phosphor plate to capture x-rays and a laser scanner to read the plate digitally. Scanned projection radiography functions similar to a CT scanner to produce digital radiographic images. Indirect and direct digital radiography use detectors like CCDs or photodiodes coupled with scintillators to directly convert x-rays to digital signals. Digital radiography allows for post-processing of images and reduces need for film and processing.
Micro Sample Measurement Using UV-Vis and Standard Optical Microscope
Micro Sample Measurement Using UV-Vis and Standard Optical MicroscopeShimadzu Scientific Instruments
This presentation describes the use of a Shimadzu UV-2600 UV-Vis Spectrophotometer coupled to a standard optical microscope via an optical fiber relay system to evaluate small filter samples approximately 1–2 mm in width.
For more information, please go to ssi.shimadzu.com. Thanks for viewing.
SPECT
Tomography involves measuring gamma ray attenuation along lines of sight at different angles in order to reconstruct the internal structure of an object. Filtered back projection enhances edges in the projection data through filtering and backprojects the filtered data to form an image. Iterative reconstruction accounts for physical factors like attenuation, scatter, and noise by comparing projections of a patient model to actual data and updating the model. Quality control ensures proper system operation through tests of the center of rotation, uniformity, and ability to detect small objects.
Recommended
Digital Techniques For Myocardial Perfusion Spect
This document provides an overview of digital techniques for myocardial perfusion SPECT imaging. It describes SPECT equipment components like the gamma camera and workstation. It explains tomographic acquisition parameters and technical considerations. Image processing techniques are covered like filtered back projection, filtering, and iterative reconstruction. Quantitative analysis methods like bullseye displays and segmental analysis are also summarized.
Image quality, digital technology and radiation protection
1. The document discusses key factors that influence image quality for both film-based and digital radiography systems, including density, contrast, resolution, and distortion.
2. It also covers radiation exposure factors like kV, mAs, and techniques to reduce patient dose like using collimation and shields.
3. Digital radiography systems use metrics like exposure index and SNR to assess image quality rather than film density, and also allow for post-processing techniques.
Dr,system abhishek
This document provides an overview of digital radiography technologies. It discusses the key components of a digital radiography system including receptors, processing units, storage, and displays. The two main types of digital radiography detectors are direct conversion detectors, which convert x-ray energy directly into electric charge, and indirect conversion detectors, which first convert x-rays to light using a scintillator. Common scintillator materials are cesium iodide and gadolinium oxysulfide. The document also compares characteristics of scintillator-based flat panel detectors and photoconductor-based detectors using selenium. It describes digital image processing techniques such as contrast adjustment using look up tables and windowing.
Computed radiography &digital radiography
Computed radiography and direct/digital radiography are two digital imaging techniques. Computed radiography uses an imaging plate that captures x-ray data, which is then converted to a digital image. Direct digital radiography uses detectors like TFT or flat panel detectors to directly capture x-ray data digitally. Both techniques offer benefits over traditional film like faster imaging and easier sharing of images.
modulation transfer function (MTF)
The resolution and performance of an optical microscope can be characterized by a quantity known as the modulation transfer function (MTF), which is a measurement of the microscope's ability to transfer contrast from the specimen to the intermediate image plane at a specific resolution.
Digital Radiography
Digital radiography systems have replaced analog film-based systems. There are several types of digital radiography including computed radiography, scanned projection radiography, and indirect and direct digital radiography. Computed radiography uses a photostimulable phosphor plate to capture x-rays and a laser scanner to read the plate digitally. Scanned projection radiography functions similar to a CT scanner to produce digital radiographic images. Indirect and direct digital radiography use detectors like CCDs or photodiodes coupled with scintillators to directly convert x-rays to digital signals. Digital radiography allows for post-processing of images and reduces need for film and processing.
Micro Sample Measurement Using UV-Vis and Standard Optical Microscope
Micro Sample Measurement Using UV-Vis and Standard Optical MicroscopeShimadzu Scientific Instruments
This presentation describes the use of a Shimadzu UV-2600 UV-Vis Spectrophotometer coupled to a standard optical microscope via an optical fiber relay system to evaluate small filter samples approximately 1–2 mm in width.
For more information, please go to ssi.shimadzu.com. Thanks for viewing.
SPECT
Tomography involves measuring gamma ray attenuation along lines of sight at different angles in order to reconstruct the internal structure of an object. Filtered back projection enhances edges in the projection data through filtering and backprojects the filtered data to form an image. Iterative reconstruction accounts for physical factors like attenuation, scatter, and noise by comparing projections of a patient model to actual data and updating the model. Quality control ensures proper system operation through tests of the center of rotation, uniformity, and ability to detect small objects.
Introduction to digital radiography and pacs
The document provides an overview of digital radiography and picture archiving and communication systems (PACS). It defines digital imaging and describes the processes of conventional radiography, computed radiography, and direct and indirect digital radiography. PACS are defined as networked systems that store and allow access to digital images in DICOM format from multiple locations. Early adoption of PACS and digital standards helped facilities share images between systems.
Lecture 12
This document discusses single photon emission computed tomography (SPECT). SPECT generates transverse images depicting the distribution of gamma ray emitting nuclides in patients. Projection images are acquired from an arc of 180 or 360 degrees around the patient and transverse images are reconstructed using filtered back-projection or iterative methods. The goals of SPECT reconstruction are to estimate the true radioactivity distribution from the measured projection data while accounting for effects like attenuation, scatter, and detector response. Filtering is applied to projection images before back-projection to "deblur" the reconstructed images and improve spatial resolution.
Nuclear imaging PET CT Imaging Medical Physics Nuclear Medicine
The document discusses various types of collimators used in nuclear imaging, including parallel-hole collimators (such as low-energy high-sensitivity, low-energy all-purpose, and low-energy high-resolution collimators), pinhole collimators, converging collimators, and diverging collimators. It explains how each collimator works, its advantages and disadvantages, and factors that affect its imaging characteristics such as sensitivity, resolution, and field of view. The document also discusses image formation in gamma cameras and factors that affect spatial resolution and contrast.
Digital Radiography PHYSICS
Digital radiography has evolved significantly since the 1970s. Computed radiography (CR) was developed in the 1980s using storage phosphor plates to capture latent images, which are then read by a scanner. Direct radiography (DR) systems developed later, directly producing digital images without needing to remove plates from cassettes. DR uses indirect conversion with scintillator layers or direct conversion using photoconductive materials. Both produce digital images but DR allows more rapid viewing and higher throughput.
Digital fluoro
Digital fluoroscopy is most commonly configured as a conventional fluoroscopy system where the analog video signal is converted to digital format via an analog-to-digital converter. Alternatively, digitization can be done with a digital video camera or direct capture of x-rays with a flat panel detector. Digital fluoroscopy systems allow for digital image recording and processing using techniques like frame averaging and edge enhancement. Radiation protection for patients and staff is important for digital fluoroscopy and techniques like collimation, minimum source-to-skin distance, and lead shielding help reduce exposure.
Cr system ABHISHEK
This document summarizes the key components and functioning of a computed radiographic (CR) system. It discusses how CR systems capture X-ray images using photostimulable phosphor plates rather than film. The plates store a latent image that is later converted to a visible digital image using a laser scanner. This allows for digital archiving and transmission of the images. The document covers the three main phases of CR imaging - capturing the aerial image using X-rays, creating the latent image on the phosphor plate, and converting and archiving the digital image file.
11
This document discusses laser medicine and medical imaging projects at RLE including:
1) Developing an ultrahigh resolution OCT system using a microstructured fiber for continuum generation, achieving 2.5 μm resolution for in vivo imaging.
2) Demonstrating spectroscopic OCT of water absorption using a 200 nm bandwidth light source centered at 1400 nm.
3) Designing OCT imaging devices like a colposcope that integrates OCT with standard clinical imaging to enable early disease detection.
Absolute Total Reflectance Spectra of Very Small Objects
This application note demonstrates an easy-to-fabricate holder that is suitable for many small samples. In addition, it shows the measurement of absolute total reflectance using this sample holder.
SWIR application - Microscopy
Explore how SWIR cameras, particularly NIT HiPe SenS, bring benefits for low light and long exposure time applications (Microscopy, Biomedical, Semiconductor Inspection, etc. )
For more information about NIT, please visit: https://new-imaging-technologies.com/ or contact us at info@new-imaging-technologies.com
Computed Radiography and digital radiography
This document provides an overview of a seminar on Computed Radiography (CR) and Digital Radiography (DR). CR involves capturing x-ray data digitally using an imaging plate, which stores radiation exposure information that is later read out by a laser and processed into an image. DR directly converts x-rays to a digital signal using a detector connected to a computer. The seminar discusses the components, principles, workings, advantages and disadvantages of each technology. It describes how CR imaging plates use photostimulated luminescence and how digital images are produced during plate reading.
Variable Angle Reflectance & Transmittance of Thin Film Coatings
This document discusses thin film coatings and their characterization using variable angle reflectance and transmittance measurements. It introduces thin film coatings that are used in consumer products to provide protective, moisture-blocking, or anti-reflective functions. Thin film thicknesses can range from 10 nm to 150 nm. The document then describes how two Shimadzu spectrophotometers equipped with accessories allow measuring transmission and reflection of thin film samples at various angles of incidence, characterizing the effect of film thickness. Transmission and reflection spectra are presented for four samples measured using the two instruments. Both instruments provide suitable characterization of thin films for research and production.
Fluoroscopy systems
The document summarizes the key components and parameters of fluoroscopy systems. It discusses the image intensifier, which converts x-ray photons into light photons and uses electrodes to focus electrons onto an output screen. Parameters like conversion coefficient, brightness uniformity, and spatial resolution are described. It also covers the image intensifier's connection to a TV system using cameras like vidicons or CCDs, and how this produces a video signal to display fluoroscopy images on a monitor in real-time.
Digital Radiography
The document discusses digital radiography, including computed radiography (CR) and direct radiography using flat panel detectors. It summarizes the limitations of conventional film-based radiography and then describes the key components and workings of CR and direct digital radiography systems. Some advantages include improved image quality, ability to manipulate images digitally, faster processing, and reduced need for retakes compared to conventional methods.
Thin Film Analysis Using Shimadzu UV-2600
This presentation focuses on the ability to measure a single protective coating on an acrylic substrate using the Shimadzu UV-2600 with 5 degree relative specular reflectance accessory and film thickness software.
Ion chambers Acceptance Testing and Evaluation
1. The document describes testing procedures for an ion chamber to characterize its performance and ensure reproducibility of results when used for reference dosimetry.
2. Tests include measuring the stem effect, cylindrical symmetry, and collection efficiency using different bias voltages.
3. Quantification of noise levels via the signal to noise ratio helps assess the chamber's suitability for low dose measurements.
COMPUTED RADIOGRAPHY
This document discusses computed radiography (CR), which is an indirect digital radiography technique. In CR, x-rays create a latent image on a photostimulable phosphor plate, which is then read with a laser and converted to a digital image. This allows for digital processing and archiving of images. While CR images have improved quality over film, attention must be paid to potential increases in patient dose from retakes or higher than needed image quality. Digital detectors also have a wider dynamic range than film, allowing "good" images even if dose is excessive.
ArcCheck 3D-Diode array evaluation, commissioning, testing for VMAT QA
Comprehensive tests on the 3D diode array phantom in light of previous finds and to evaluate the new software upgrades.
EUV Lithography Final
This document discusses optical lithography and the challenges of achieving high resolution for integrated circuit fabrication. It covers the lithography process, the role of lithography in IC fabrication, and resolution challenges like diffraction. It then describes several lithography methods used today or under development to improve resolution, including proximity lithography, contact lithography, projection lithography, phase-shifting masks, immersion lithography, and extreme ultraviolet lithography (EUVL). The document focuses on EUVL and the associated challenges of mask design and multilayer optics required for EUV wavelengths. It concludes with a section on simulating an EUV lithography system.
Image quality
The document discusses factors that impact radiographic image quality, including film factors, geometric factors, and subject factors. Key aspects of image quality are spatial resolution, contrast resolution, noise, and artifacts. Spatial resolution refers to the ability to distinguish small structures, while contrast resolution is the ability to distinguish similar densities. Noise comes from film graininess and quantum mottle. The film's characteristic curve shows the relationship between exposure and optical density. Proper processing, including time, temperature and chemicals, is important for achieving good radiographic quality.
radiographic Image quality by Astuti Mishra
This document discusses the factors that influence radiographic image quality. It defines radiographic quality as the accuracy of representing a patient's anatomy on an image. The key factors discussed are sharpness, contrast, resolution, noise, image size, and artifacts. Sharpness is influenced by focal spot size, distances, and movement. Contrast depends on subject properties, exposure factors, and the image receptor. Resolution is limited by contrast, sharpness, noise, and speed. Noise has several sources. Proper patient positioning, selection of technical factors, and use of grids can improve image quality. Artifacts may occur during exposure, processing, or handling and can interfere with interpretation.
More Related Content
What's hot
Introduction to digital radiography and pacs
The document provides an overview of digital radiography and picture archiving and communication systems (PACS). It defines digital imaging and describes the processes of conventional radiography, computed radiography, and direct and indirect digital radiography. PACS are defined as networked systems that store and allow access to digital images in DICOM format from multiple locations. Early adoption of PACS and digital standards helped facilities share images between systems.
Lecture 12
This document discusses single photon emission computed tomography (SPECT). SPECT generates transverse images depicting the distribution of gamma ray emitting nuclides in patients. Projection images are acquired from an arc of 180 or 360 degrees around the patient and transverse images are reconstructed using filtered back-projection or iterative methods. The goals of SPECT reconstruction are to estimate the true radioactivity distribution from the measured projection data while accounting for effects like attenuation, scatter, and detector response. Filtering is applied to projection images before back-projection to "deblur" the reconstructed images and improve spatial resolution.
Nuclear imaging PET CT Imaging Medical Physics Nuclear Medicine
The document discusses various types of collimators used in nuclear imaging, including parallel-hole collimators (such as low-energy high-sensitivity, low-energy all-purpose, and low-energy high-resolution collimators), pinhole collimators, converging collimators, and diverging collimators. It explains how each collimator works, its advantages and disadvantages, and factors that affect its imaging characteristics such as sensitivity, resolution, and field of view. The document also discusses image formation in gamma cameras and factors that affect spatial resolution and contrast.
Digital Radiography PHYSICS
Digital radiography has evolved significantly since the 1970s. Computed radiography (CR) was developed in the 1980s using storage phosphor plates to capture latent images, which are then read by a scanner. Direct radiography (DR) systems developed later, directly producing digital images without needing to remove plates from cassettes. DR uses indirect conversion with scintillator layers or direct conversion using photoconductive materials. Both produce digital images but DR allows more rapid viewing and higher throughput.
Digital fluoro
Digital fluoroscopy is most commonly configured as a conventional fluoroscopy system where the analog video signal is converted to digital format via an analog-to-digital converter. Alternatively, digitization can be done with a digital video camera or direct capture of x-rays with a flat panel detector. Digital fluoroscopy systems allow for digital image recording and processing using techniques like frame averaging and edge enhancement. Radiation protection for patients and staff is important for digital fluoroscopy and techniques like collimation, minimum source-to-skin distance, and lead shielding help reduce exposure.
Cr system ABHISHEK
This document summarizes the key components and functioning of a computed radiographic (CR) system. It discusses how CR systems capture X-ray images using photostimulable phosphor plates rather than film. The plates store a latent image that is later converted to a visible digital image using a laser scanner. This allows for digital archiving and transmission of the images. The document covers the three main phases of CR imaging - capturing the aerial image using X-rays, creating the latent image on the phosphor plate, and converting and archiving the digital image file.
11
This document discusses laser medicine and medical imaging projects at RLE including:
1) Developing an ultrahigh resolution OCT system using a microstructured fiber for continuum generation, achieving 2.5 μm resolution for in vivo imaging.
2) Demonstrating spectroscopic OCT of water absorption using a 200 nm bandwidth light source centered at 1400 nm.
3) Designing OCT imaging devices like a colposcope that integrates OCT with standard clinical imaging to enable early disease detection.
Absolute Total Reflectance Spectra of Very Small Objects
This application note demonstrates an easy-to-fabricate holder that is suitable for many small samples. In addition, it shows the measurement of absolute total reflectance using this sample holder.
SWIR application - Microscopy
Explore how SWIR cameras, particularly NIT HiPe SenS, bring benefits for low light and long exposure time applications (Microscopy, Biomedical, Semiconductor Inspection, etc. )
For more information about NIT, please visit: https://new-imaging-technologies.com/ or contact us at info@new-imaging-technologies.com
Computed Radiography and digital radiography
This document provides an overview of a seminar on Computed Radiography (CR) and Digital Radiography (DR). CR involves capturing x-ray data digitally using an imaging plate, which stores radiation exposure information that is later read out by a laser and processed into an image. DR directly converts x-rays to a digital signal using a detector connected to a computer. The seminar discusses the components, principles, workings, advantages and disadvantages of each technology. It describes how CR imaging plates use photostimulated luminescence and how digital images are produced during plate reading.
Variable Angle Reflectance & Transmittance of Thin Film Coatings
This document discusses thin film coatings and their characterization using variable angle reflectance and transmittance measurements. It introduces thin film coatings that are used in consumer products to provide protective, moisture-blocking, or anti-reflective functions. Thin film thicknesses can range from 10 nm to 150 nm. The document then describes how two Shimadzu spectrophotometers equipped with accessories allow measuring transmission and reflection of thin film samples at various angles of incidence, characterizing the effect of film thickness. Transmission and reflection spectra are presented for four samples measured using the two instruments. Both instruments provide suitable characterization of thin films for research and production.
Fluoroscopy systems
The document summarizes the key components and parameters of fluoroscopy systems. It discusses the image intensifier, which converts x-ray photons into light photons and uses electrodes to focus electrons onto an output screen. Parameters like conversion coefficient, brightness uniformity, and spatial resolution are described. It also covers the image intensifier's connection to a TV system using cameras like vidicons or CCDs, and how this produces a video signal to display fluoroscopy images on a monitor in real-time.
Digital Radiography
The document discusses digital radiography, including computed radiography (CR) and direct radiography using flat panel detectors. It summarizes the limitations of conventional film-based radiography and then describes the key components and workings of CR and direct digital radiography systems. Some advantages include improved image quality, ability to manipulate images digitally, faster processing, and reduced need for retakes compared to conventional methods.
Thin Film Analysis Using Shimadzu UV-2600
This presentation focuses on the ability to measure a single protective coating on an acrylic substrate using the Shimadzu UV-2600 with 5 degree relative specular reflectance accessory and film thickness software.
Ion chambers Acceptance Testing and Evaluation
1. The document describes testing procedures for an ion chamber to characterize its performance and ensure reproducibility of results when used for reference dosimetry.
2. Tests include measuring the stem effect, cylindrical symmetry, and collection efficiency using different bias voltages.
3. Quantification of noise levels via the signal to noise ratio helps assess the chamber's suitability for low dose measurements.
COMPUTED RADIOGRAPHY
This document discusses computed radiography (CR), which is an indirect digital radiography technique. In CR, x-rays create a latent image on a photostimulable phosphor plate, which is then read with a laser and converted to a digital image. This allows for digital processing and archiving of images. While CR images have improved quality over film, attention must be paid to potential increases in patient dose from retakes or higher than needed image quality. Digital detectors also have a wider dynamic range than film, allowing "good" images even if dose is excessive.
ArcCheck 3D-Diode array evaluation, commissioning, testing for VMAT QA
Comprehensive tests on the 3D diode array phantom in light of previous finds and to evaluate the new software upgrades.
EUV Lithography Final
This document discusses optical lithography and the challenges of achieving high resolution for integrated circuit fabrication. It covers the lithography process, the role of lithography in IC fabrication, and resolution challenges like diffraction. It then describes several lithography methods used today or under development to improve resolution, including proximity lithography, contact lithography, projection lithography, phase-shifting masks, immersion lithography, and extreme ultraviolet lithography (EUVL). The document focuses on EUVL and the associated challenges of mask design and multilayer optics required for EUV wavelengths. It concludes with a section on simulating an EUV lithography system.
Image quality
The document discusses factors that impact radiographic image quality, including film factors, geometric factors, and subject factors. Key aspects of image quality are spatial resolution, contrast resolution, noise, and artifacts. Spatial resolution refers to the ability to distinguish small structures, while contrast resolution is the ability to distinguish similar densities. Noise comes from film graininess and quantum mottle. The film's characteristic curve shows the relationship between exposure and optical density. Proper processing, including time, temperature and chemicals, is important for achieving good radiographic quality.
radiographic Image quality by Astuti Mishra
This document discusses the factors that influence radiographic image quality. It defines radiographic quality as the accuracy of representing a patient's anatomy on an image. The key factors discussed are sharpness, contrast, resolution, noise, image size, and artifacts. Sharpness is influenced by focal spot size, distances, and movement. Contrast depends on subject properties, exposure factors, and the image receptor. Resolution is limited by contrast, sharpness, noise, and speed. Noise has several sources. Proper patient positioning, selection of technical factors, and use of grids can improve image quality. Artifacts may occur during exposure, processing, or handling and can interfere with interpretation.
What's hot (20)
Nuclear imaging PET CT Imaging Medical Physics Nuclear Medicine
Nuclear imaging PET CT Imaging Medical Physics Nuclear Medicine
Absolute Total Reflectance Spectra of Very Small Objects
Absolute Total Reflectance Spectra of Very Small Objects
Variable Angle Reflectance & Transmittance of Thin Film Coatings
Variable Angle Reflectance & Transmittance of Thin Film Coatings
ArcCheck 3D-Diode array evaluation, commissioning, testing for VMAT QA
ArcCheck 3D-Diode array evaluation, commissioning, testing for VMAT QA
Viewers also liked
Quickbooks Documentation
This document provides step-by-step instructions for various QuickBooks tasks such as adding a new customer, removing a customer, editing customer information, adding a customer "on the fly" when creating an invoice, and printing and using the chart of accounts. It was prepared by Edna Washington, President/CEO of Washington Consulting, for use with QuickBooks Pro 2007-2009.
You, Me, And Everyone We Know
Recent presentation on grass roots advocacy presented at Iowa Association of School Boards Conference in Des-Moines, IA.
Dracula Project
This document provides examples of lesson plans for teaching Italian using books, films, and television shows about vampires. It divides content by level from primary school through university. Sample activities described include having students choose a work and describe characters, select and act out scenes, compare book and film plots, and analyze targets and content of different media. The goal is to use popular vampire stories to engage students and teach grammar, vocabulary, and cultural topics in Italian and English.
Viewers also liked (16)
Similar to J Fernandes Hst 2009
DOC-20190524-WA0008.ppt
Synthetic aperture radar (SAR) uses the motion of the radar platform to synthesize a large antenna aperture, providing very high cross-range resolution. It collects returns sequentially and processes them as if collected simultaneously. Inverse SAR uses target motion instead of platform motion, allowing imaging of moving objects like ships. Both techniques overcome limitations of conventional radar to generate high-resolution radar images of terrain and targets.
Otdrpresentation 171203144201
The document discusses optical time domain reflectometry (OTDR) which is used to locate faults in optical fibers. An OTDR works by launching light pulses into a fiber and analyzing the backscattered light to map the fiber's characteristics. It can detect events like connections, bends, and breaks by analyzing reflections and loss in the returned optical signal over time. The document covers OTDR operating principles, the factors that determine its measurement resolution and event location ability, and how it is used in the industry to test fiber links and networks.
Senior design final presentation master
This senior design project involves designing an FM-CW automobile radar system and algorithms for pedestrian recognition in foggy conditions. The system will use a 77 GHz radar with a phased array antenna to scan a range of 100 meters. Key aspects of the design include antenna design using a patch microstrip array, an LFM-CW waveform, signal processing algorithms for target detection and classification, and constant false alarm rate detection accounting for noise levels and range. The goal is to improve pedestrian detection performance in fog through improved range resolution and Doppler analysis.
Rectangularmicrostrippatchantenna
This document describes the design and analysis of a rectangular microstrip patch antenna. It discusses the fundamental parameters of antennas, defines a microstrip patch antenna and its properties. It then details the design specifications for the rectangular patch, including its 3D modeling in HFSS software. The results of simulating the patch antenna in HFSS are presented, including S-parameters, radiation patterns and far field reports. Advantages and disadvantages of microstrip patch antennas are listed, along with their applications. The conclusion discusses achieving better return loss, gain and efficiency for the designed patch antenna.
4_IGARSS11_HRWS.ppt
The document summarizes the performance of a high-resolution wide-swath SAR system operating in stripmap quad-polarized mode and ultra-wide ScanSAR mode. In stripmap quad-pol mode, the system achieves a spatial resolution of 1m x 1m across 12 subswaths covering a 20-50km swath with a NESZ below -19.5dB and RASR below -19dB and -27dB for cross and co-polarization, respectively. In ultra-wide ScanSAR mode, the system images a 375km swath in a single pass with a spatial resolution of 1m x 9m, NESZ below -22.6dB, RASR
Elint Interception & Analysis
This document provides a summary of a professional development short course on ELINT (Electronic Intelligence) Interception and Analysis. The course, taught by Dr. Richard G. Wiley, covers methods for intercepting radar and other non-communication signals, analyzing the signals to determine their functions and capabilities, and practical exercises. Participants receive a textbook on ELINT. The 4-day course outline covers topics like radar fundamentals, receiver types, direction finding techniques, emitter location, pulse analysis, and modern radar waveforms.
Structural Health Monitoring of Bridges Buildings and Industrial Plant with N...
Learn about Polytec’s latest laser vibrometer, specifically designed for remote, long range vibration and deflection measurements on bridges, buildings, towers, industrial plant, high voltage insulators or indeed any surface that is inaccessible or hard to reach. The system features a very high optical sensitivity, which means that it can also be used on surfaces at distances that would otherwise require surface treatment for vibrometry measurement. The webinar will share examples showing how the RSV-150 saves time and effort when monitoring the health of structures, including the measurement of resonant frequencies and deflections of bridges subjected to traffic loading. Find out how the laser Doppler approach compares with the alternative contacting and remote sensing methods.
Research paper
This document discusses signal processing techniques for removing distortion in ultra-wideband radar and enabling network aided positioning. It describes how the synchronous impulse reconstruction technique is used to digitize wideband radar signals with relatively slow ADCs. However, when the radar is moving, phase and amplitude distortions are introduced in the reconstructed signal. The document then presents a signal processing method to compensate for this motion-induced distortion using the radar's speed and location data. It also discusses how network aided positioning systems can estimate the location of an object using signal strength characteristics and pattern matching techniques.
Synthetic aperture radar (sar) 20150930
This document provides an overview of synthetic aperture radar (SAR) basics and theory. It discusses key aspects of SAR including how it works, imaging geometry, spatial resolution, backscatter coefficients, common frequency bands, and advanced modes. SAR uses microwave radiation and can image the Earth's surface in all weather and light conditions, providing complementary data to optical remote sensing. It discusses concepts such as range and azimuth resolution, factors that influence backscatter, and challenges like speckle that SAR addresses through techniques like multi-look processing.
Medical sensing, localization, and communications usingultra wideband technol...
Medical sensing, localization, and communications usingultra wideband technol...The Research Council of Norway, IKTPLUSS
This document discusses the MELODY project which uses ultra wideband technology for medical sensing, localization, and communications. The project aims to develop wireless technologies to continuously monitor vital signs, perform high resolution medical imaging without contact, localize objects inside the body, and transmit high data rate signals from implanted devices. Specific applications discussed include a wireless capsule endoscope for gastrointestinal imaging, localization of implants, and using medical radar to measure heart rate and blood pressure. The project has developed technologies to enable full HD video transmission from an ingestible capsule and localization of implants within millimeters.Sar
This document discusses synthetic aperture radar (SAR) and its use in remote sensing applications. SAR uses signal processing to simulate a large physical antenna on an airborne or spaceborne platform. As the platform moves, SAR collects and combines radar return signals to generate high-resolution imagery of the terrain below. Key aspects of SAR discussed include cross-range resolution, sequential generation of the synthetic antenna aperture, and phase correction to focus the SAR image. Applications mentioned include military reconnaissance, oceanography, geology, surveillance, and environmental monitoring.
International Journal of Computational Engineering Research(IJCER)
The document describes an active cancellation algorithm for radar cross section reduction. The algorithm uses hardware components like receiving and transmitting antennas along with software like MATLAB and C programs. It works by receiving an incoming radar signal, analyzing its parameters, searching databases to find matching echo data, generating a cancellation signal to transmit, and establishing scattering fields to synthesize an empty pattern for the radar receiver. Testing showed the algorithm improved visibility reduction by 25% over conventional methods.
otdr-120109011429-phpapp02.pptx
An OTDR is an instrument used to test fiber optic cables by launching an optical signal and analyzing the return signal. It can measure attenuation, length, and losses from splices and connectors. The basic principle is that it works like an optical radar. Key factors for OTDR setup include range, pulse width, index of refraction, and averaging time. OTDRs can identify events along a cable and be used for fault location and documentation. Trace analysis involves using cursors to measure losses and lengths. Limitations include difficulty resolving short distances in LAN environments.
Sparse and Redundant Representations: Theory and Applications
Sparse and Redundant Representations: Theory and ApplicationsDistinguished Lecturer Series - Leon The Mathematician
Aggelos Katsaggelos, Professor and AT&T Chair, Northwestern University, Department of Electrical Engineering & Computer Science (IEEE/ SPIE Fellow, IEEE SPS DL), Sparse and Redundant Representations: Theory and ApplicationsDAY-1---5-16-10----K2--Andrew-Owen.pdf
This document discusses how electronic intelligence (ELINT) systems need to evolve to deal with modern radars. It notes that current wideband receivers have limitations like insufficient sensitivity and dynamic range to detect high-power radars. The key aspects that next-generation ELINT systems need are: very high sensitivity across a wide frequency range, signal separation in both frequency and time domains before analysis, manageable data volumes through heavy data reduction while preserving signal coherence, and operating as a digital system. Such systems would have significantly better capability to detect, analyze, and collect intelligence from modern radars employing technologies like electronic scanning arrays and frequency agility.
High-Speed Single-Photon SPAD Camera
This document discusses the development of a high-speed single-photon camera. It motivates the need for cameras with both extreme sensitivity and high speeds to enable applications like fluorescence correlation spectroscopy (FCS). The camera uses an array of single-photon avalanche diode (SPAD) detectors integrated on a CMOS chip. Each pixel contains circuitry to independently count and time photons with microsecond resolution at frame rates over 100,000 frames per second. The camera has been used for applications demonstrating sub-Rayleigh imaging and high-throughput FCS.
Introduction to li dar technology advanced remote sensing
This document provides an overview of LiDAR technology presented by Mr. Ashenafi B. It describes the components of a LiDAR system including lasers, scanners, GPS, and high-precision clocks. The principles of LiDAR are explained such as how it measures distance using time of flight and records location and orientation data. Different LiDAR types and platforms like airborne, terrestrial, and satellite are covered. Applications including DEM generation, forest inventory, and landslide analysis are listed. Advantages of LiDAR are high accuracy and weather independence while disadvantages include high costs and lack of foliage penetration.
Als seminar
This document discusses airborne laser scanning (ALS) and its applications. It begins by defining ALS and its history. It then describes the key components of a typical ALS system, including a laser, scanner, GPS, IMU, and control units. It discusses how ALS measures distance and collects point cloud data. Application examples are given, such as generating digital terrain models and surface models over large areas. The document also includes a case study on using ALS and high-resolution satellite data to study geomorphic features in parts of the Elbe River valley in Germany.
Radar Principles & Systems.ppt
This document provides an overview of radar principles and systems. It describes the basic operation of pulse radar and continuous wave radar. Key components of pulse radar systems are discussed, including synchronizers, transmitters, antennas, duplexers, receivers, and display units. Factors that influence radar performance such as signal reception, receiver bandwidth, pulse shape, and power are also covered. Different modulation techniques and specific radar types like frequency modulated CW radar and pulse Doppler radar are described.
otdr-120109011429-phpapp02.pdf
An OTDR is an instrument used to test optical fibers which works like an optical radar. It evaluates fiber optic link characteristics and measures fiber parameters such as attenuation, length, and loss. The document discusses OTDR operational principles, basic setup requirements including range, pulse width, and index of refraction. It also covers OTDR types, testing and trace analysis procedures, and limitations in testing short-distance fibers.
Similar to J Fernandes Hst 2009 (20)
Structural Health Monitoring of Bridges Buildings and Industrial Plant with N...
Structural Health Monitoring of Bridges Buildings and Industrial Plant with N...
Medical sensing, localization, and communications usingultra wideband technol...
Medical sensing, localization, and communications usingultra wideband technol...
International Journal of Computational Engineering Research(IJCER)
International Journal of Computational Engineering Research(IJCER)
Sparse and Redundant Representations: Theory and Applications
Sparse and Redundant Representations: Theory and Applications
Introduction to li dar technology advanced remote sensing
Introduction to li dar technology advanced remote sensing
Recently uploaded
"Scaling RAG Applications to serve millions of users", Kevin Goedecke
How we managed to grow and scale a RAG application from zero to thousands of users in 7 months. Lessons from technical challenges around managing high load for LLMs, RAGs and Vector databases.
Essentials of Automations: Exploring Attributes & Automation Parameters
Building automations in FME Flow can save time, money, and help businesses scale by eliminating data silos and providing data to stakeholders in real-time. One essential component to orchestrating complex automations is the use of attributes & automation parameters (both formerly known as “keys”). In fact, it’s unlikely you’ll ever build an Automation without using these components, but what exactly are they?
Attributes & automation parameters enable the automation author to pass data values from one automation component to the next. During this webinar, our FME Flow Specialists will cover leveraging the three types of these output attributes & parameters in FME Flow: Event, Custom, and Automation. As a bonus, they’ll also be making use of the Split-Merge Block functionality.
You’ll leave this webinar with a better understanding of how to maximize the potential of automations by making use of attributes & automation parameters, with the ultimate goal of setting your enterprise integration workflows up on autopilot.
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...
This LF Energy webinar took place June 20, 2024. It featured:
-Alex Thornton, LF Energy
-Hallie Cramer, Google
-Daniel Roesler, UtilityAPI
-Henry Richardson, WattTime
In response to the urgency and scale required to effectively address climate change, open source solutions offer significant potential for driving innovation and progress. Currently, there is a growing demand for standardization and interoperability in energy data and modeling. Open source standards and specifications within the energy sector can also alleviate challenges associated with data fragmentation, transparency, and accessibility. At the same time, it is crucial to consider privacy and security concerns throughout the development of open source platforms.
This webinar will delve into the motivations behind establishing LF Energy’s Carbon Data Specification Consortium. It will provide an overview of the draft specifications and the ongoing progress made by the respective working groups.
Three primary specifications will be discussed:
-Discovery and client registration, emphasizing transparent processes and secure and private access
-Customer data, centering around customer tariffs, bills, energy usage, and full consumption disclosure
-Power systems data, focusing on grid data, inclusive of transmission and distribution networks, generation, intergrid power flows, and market settlement data
Astute Business Solutions | Oracle Cloud Partner |
Your goto partner for Oracle Cloud, PeopleSoft, E-Business Suite, and Ellucian Banner. We are a firm specialized in managed services and consulting.
Northern Engraving | Nameplate Manufacturing Process - 2024
Manufacturing custom quality metal nameplates and badges involves several standard operations. Processes include sheet prep, lithography, screening, coating, punch press and inspection. All decoration is completed in the flat sheet with adhesive and tooling operations following. The possibilities for creating unique durable nameplates are endless. How will you create your brand identity? We can help!
The Microsoft 365 Migration Tutorial For Beginner.pptx
This presentation will help you understand the power of Microsoft 365. However, we have mentioned every productivity app included in Office 365. Additionally, we have suggested the migration situation related to Office 365 and how we can help you.
You can also read: https://www.systoolsgroup.com/updates/office-365-tenant-to-tenant-migration-step-by-step-complete-guide/
ScyllaDB Tablets: Rethinking Replication
ScyllaDB is making a major architecture shift. We’re moving from vNode replication to tablets – fragments of tables that are distributed independently, enabling dynamic data distribution and extreme elasticity. In this keynote, ScyllaDB co-founder and CTO Avi Kivity explains the reason for this shift, provides a look at the implementation and roadmap, and shares how this shift benefits ScyllaDB users.
Northern Engraving | Modern Metal Trim, Nameplates and Appliance Panels
What began over 115 years ago as a supplier of precision gauges to the automotive industry has evolved into being an industry leader in the manufacture of product branding, automotive cockpit trim and decorative appliance trim. Value-added services include in-house Design, Engineering, Program Management, Test Lab and Tool Shops.
Principle of conventional tomography-Bibash Shahi ppt..pptx
before the computed tomography, it had been widely used.
"$10 thousand per minute of downtime: architecture, queues, streaming and fin...
Direct losses from downtime in 1 minute = $5-$10 thousand dollars. Reputation is priceless.
As part of the talk, we will consider the architectural strategies necessary for the development of highly loaded fintech solutions. We will focus on using queues and streaming to efficiently work and manage large amounts of data in real-time and to minimize latency.
We will focus special attention on the architectural patterns used in the design of the fintech system, microservices and event-driven architecture, which ensure scalability, fault tolerance, and consistency of the entire system.
High performance Serverless Java on AWS- GoTo Amsterdam 2024
Java is for many years one of the most popular programming languages, but it used to have hard times in the Serverless community. Java is known for its high cold start times and high memory footprint, comparing to other programming languages like Node.js and Python. In this talk I'll look at the general best practices and techniques we can use to decrease memory consumption, cold start times for Java Serverless development on AWS including GraalVM (Native Image) and AWS own offering SnapStart based on Firecracker microVM snapshot and restore and CRaC (Coordinated Restore at Checkpoint) runtime hooks. I'll also provide a lot of benchmarking on Lambda functions trying out various deployment package sizes, Lambda memory settings, Java compilation options and HTTP (a)synchronous clients and measure their impact on cold and warm start times.
Must Know Postgres Extension for DBA and Developer during Migration
Mydbops Opensource Database Meetup 16
Topic: Must-Know PostgreSQL Extensions for Developers and DBAs During Migration
Speaker: Deepak Mahto, Founder of DataCloudGaze Consulting
Date & Time: 8th June | 10 AM - 1 PM IST
Venue: Bangalore International Centre, Bangalore
Abstract: Discover how PostgreSQL extensions can be your secret weapon! This talk explores how key extensions enhance database capabilities and streamline the migration process for users moving from other relational databases like Oracle.
Key Takeaways:
* Learn about crucial extensions like oracle_fdw, pgtt, and pg_audit that ease migration complexities.
* Gain valuable strategies for implementing these extensions in PostgreSQL to achieve license freedom.
* Discover how these key extensions can empower both developers and DBAs during the migration process.
* Don't miss this chance to gain practical knowledge from an industry expert and stay updated on the latest open-source database trends.
Mydbops Managed Services specializes in taking the pain out of database management while optimizing performance. Since 2015, we have been providing top-notch support and assistance for the top three open-source databases: MySQL, MongoDB, and PostgreSQL.
Our team offers a wide range of services, including assistance, support, consulting, 24/7 operations, and expertise in all relevant technologies. We help organizations improve their database's performance, scalability, efficiency, and availability.
Contact us: info@mydbops.com
Visit: https://www.mydbops.com/
Follow us on LinkedIn: https://in.linkedin.com/company/mydbops
For more details and updates, please follow up the below links.
Meetup Page : https://www.meetup.com/mydbops-databa...
Twitter: https://twitter.com/mydbopsofficial
Blogs: https://www.mydbops.com/blog/
Facebook(Meta): https://www.facebook.com/mydbops/
Mutation Testing for Task-Oriented Chatbots
Conversational agents, or chatbots, are increasingly used to access all sorts of services using natural language. While open-domain chatbots - like ChatGPT - can converse on any topic, task-oriented chatbots - the focus of this paper - are designed for specific tasks, like booking a flight, obtaining customer support, or setting an appointment. Like any other software, task-oriented chatbots need to be properly tested, usually by defining and executing test scenarios (i.e., sequences of user-chatbot interactions). However, there is currently a lack of methods to quantify the completeness and strength of such test scenarios, which can lead to low-quality tests, and hence to buggy chatbots.
To fill this gap, we propose adapting mutation testing (MuT) for task-oriented chatbots. To this end, we introduce a set of mutation operators that emulate faults in chatbot designs, an architecture that enables MuT on chatbots built using heterogeneous technologies, and a practical realisation as an Eclipse plugin. Moreover, we evaluate the applicability, effectiveness and efficiency of our approach on open-source chatbots, with promising results.
Harnessing the Power of NLP and Knowledge Graphs for Opioid Research
Gursev Pirge, PhD
Senior Data Scientist - JohnSnowLabs
Session 1 - Intro to Robotic Process Automation.pdf
👉 Check out our full 'Africa Series - Automation Student Developers (EN)' page to register for the full program:
https://bit.ly/Automation_Student_Kickstart
In this session, we shall introduce you to the world of automation, the UiPath Platform, and guide you on how to install and setup UiPath Studio on your Windows PC.
📕 Detailed agenda:
What is RPA? Benefits of RPA?
RPA Applications
The UiPath End-to-End Automation Platform
UiPath Studio CE Installation and Setup
💻 Extra training through UiPath Academy:
Introduction to Automation
UiPath Business Automation Platform
Explore automation development with UiPath Studio
👉 Register here for our upcoming Session 2 on June 20: Introduction to UiPath Studio Fundamentals: https://community.uipath.com/events/details/uipath-lagos-presents-session-2-introduction-to-uipath-studio-fundamentals/
Demystifying Knowledge Management through Storytelling
The Department of Veteran Affairs (VA) invited Taylor Paschal, Knowledge & Information Management Consultant at Enterprise Knowledge, to speak at a Knowledge Management Lunch and Learn hosted on June 12, 2024. All Office of Administration staff were invited to attend and received professional development credit for participating in the voluntary event.
The objectives of the Lunch and Learn presentation were to:
- Review what KM ‘is’ and ‘isn’t’
- Understand the value of KM and the benefits of engaging
- Define and reflect on your “what’s in it for me?”
- Share actionable ways you can participate in Knowledge - - Capture & Transfer
Recently uploaded (20)
"Scaling RAG Applications to serve millions of users", Kevin Goedecke
"Scaling RAG Applications to serve millions of users", Kevin Goedecke
Essentials of Automations: Exploring Attributes & Automation Parameters
Essentials of Automations: Exploring Attributes & Automation Parameters
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...
Astute Business Solutions | Oracle Cloud Partner |
Astute Business Solutions | Oracle Cloud Partner |
Northern Engraving | Nameplate Manufacturing Process - 2024
Northern Engraving | Nameplate Manufacturing Process - 2024
The Microsoft 365 Migration Tutorial For Beginner.pptx
The Microsoft 365 Migration Tutorial For Beginner.pptx
Northern Engraving | Modern Metal Trim, Nameplates and Appliance Panels
Northern Engraving | Modern Metal Trim, Nameplates and Appliance Panels
Principle of conventional tomography-Bibash Shahi ppt..pptx
Principle of conventional tomography-Bibash Shahi ppt..pptx
Poznań ACE event - 19.06.2024 Team 24 Wrapup slidedeck
Poznań ACE event - 19.06.2024 Team 24 Wrapup slidedeck
"$10 thousand per minute of downtime: architecture, queues, streaming and fin...
"$10 thousand per minute of downtime: architecture, queues, streaming and fin...
High performance Serverless Java on AWS- GoTo Amsterdam 2024
High performance Serverless Java on AWS- GoTo Amsterdam 2024
Must Know Postgres Extension for DBA and Developer during Migration
Must Know Postgres Extension for DBA and Developer during Migration
Harnessing the Power of NLP and Knowledge Graphs for Opioid Research
Harnessing the Power of NLP and Knowledge Graphs for Opioid Research
Session 1 - Intro to Robotic Process Automation.pdf
Session 1 - Intro to Robotic Process Automation.pdf
Demystifying Knowledge Management through Storytelling
Demystifying Knowledge Management through Storytelling
J Fernandes Hst 2009
- 2. Outline Standoff detection of body-worn explosives General detection approach FDFD Modeling Experiment description Signal processing Results
- 3. Detection Approach Narrowbeam, 4.3 cm wide region of illumination
- 4. Narrow beamwidth Projected scanned beam on target: Images courtesy of Borja Gonzalez- Valdes, Northeastern University
- 5. FDFD Modeling 2-Dimensional TMz Polarization Multistatic and multi-monostatic configurations simulated Multiple frequencies simulated for future frequency-modulated continuous-wave (FMCW) simulations
- 6. FDFD Modeling (cont…) Geometry files used
- 7. FDFD simulation parameters 13 uniform plane waves (UPW) Range = 10 m 2.7o aperture (about 0.47 m @ 10m Range)
- 8. Focused beam Superposition of 13 UPW with phase adjusted according to position of focus.
- 9. Received fields 3D Near field to near field transformation Received field function of scanned beam position Multistatic (multiple transmitters multiple receivers) Multi-monostatic (single transmitter, single receiver)
- 10. Received fields (aperture = 0.47 meters)
- 11. Received fields (aperture = 0.8 meters)
- 12. Better cross range resolution w/ larger aperture 0.47 m 0.8 m
- 13. Experimental Description Radar Module Feed Antenna Reflector Tuning Voltage Hardware
- 14. FMCW signal processing Frequency-modulated continuous-wave radar Range Profile of Corner Cube 18000 range profiles obtained as target rotated 360 degrees on turn table
- 15. ISAR processing
- 16. Targets used for measurements Skin reflects 70% as well as metal at 94 GHz due to high water content. Scattering dominated by natural unknown contours of human body. Must use very diverse body types to test robustness of system.
- 17. Signal Processing Standoff detection constraint restricts total azimuthal view of target. Must use finite azimuth segments of range profiles to simulate limited view of an actual radar system. FFT
- 18. Example limited view ISAR images (2.7o aperture) Extended early and late time response.
- 19. Target classification Best fit ellipse finding algorithm used for quantifying elongated time response a b a/b > Threshold a/b < Threshold no threat threat
- 20. Results
- 21. Conclusion Multiple features in limited view ISAR images distinguishing threats from non-threats. Largest distinguishing feature is the elongated time response. Ellipse finding algorithm has been successful in distinguishing threats from non threats. Limited aperture size and phase noise limit resolution and capabilities of system. Multi-static system with digitally controlled frequency ramp could lead to a commercial detection system.
- 22. References
- 23. Acknowledgements
- 24. Questions?