What is time-resolved cathodoluminescence?Delmic B.V.
Time-resolved cathodoluminescence is a technique in which the time dynamics of the cathodoluminescence emission process is observed.
This presentation will give you an overview of the time-resolved cathodoluminescence techniques: lifetime imaging (or emission decay) and g(2) imaging, which is also known in physics as second-order correlation function.
The SPARC is a high-performance cathodoluminescence detection system designed and produced by Delmic, which offers a unique solution for cathodoluminescence imaging. With the Delmic LAB Cube (a time-resolved CL module) for the SPARC, it is possible to extend the SPARC to do lifetime and antibunching experiments.
For questions about cathodoluminescence, the SPARC and the LAB Cube, please leave a comment below or
visit www.delmic.com and send us an email.
Development of Nonlinear Optical Microscope and ScannerRohan Sharma
For my internship at the Femtosecond Spectroscopy & Nonlinear Optics Lab at IIT Delhi, I worked on the development of nonlinear optical microscope and scanner for 10 weeks.During the internship, I developed a multimodal nonlinear optical microscope employing white light and femtosecond laser to record the optical imaging, transmission imaging as well as the second harmonic generation (SHG) imaging of a sample.
This presentation shows the basics of a volume hologram and its applications.The main focus of this presentation is optical computing using volume hologram. The optical computing schemes used in this presentation are Vundelught filter, joint Fourier transform correlator, and optical neural network.
What is time-resolved cathodoluminescence?Delmic B.V.
Time-resolved cathodoluminescence is a technique in which the time dynamics of the cathodoluminescence emission process is observed.
This presentation will give you an overview of the time-resolved cathodoluminescence techniques: lifetime imaging (or emission decay) and g(2) imaging, which is also known in physics as second-order correlation function.
The SPARC is a high-performance cathodoluminescence detection system designed and produced by Delmic, which offers a unique solution for cathodoluminescence imaging. With the Delmic LAB Cube (a time-resolved CL module) for the SPARC, it is possible to extend the SPARC to do lifetime and antibunching experiments.
For questions about cathodoluminescence, the SPARC and the LAB Cube, please leave a comment below or
visit www.delmic.com and send us an email.
Development of Nonlinear Optical Microscope and ScannerRohan Sharma
For my internship at the Femtosecond Spectroscopy & Nonlinear Optics Lab at IIT Delhi, I worked on the development of nonlinear optical microscope and scanner for 10 weeks.During the internship, I developed a multimodal nonlinear optical microscope employing white light and femtosecond laser to record the optical imaging, transmission imaging as well as the second harmonic generation (SHG) imaging of a sample.
This presentation shows the basics of a volume hologram and its applications.The main focus of this presentation is optical computing using volume hologram. The optical computing schemes used in this presentation are Vundelught filter, joint Fourier transform correlator, and optical neural network.
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Multispectral imaging in Forensics with VideometerLab 3Adrian Waltho
Multispectral imaging provides valuable information on the quality and safety of a vast array of materials from pharmaceuticals to raw meat and burned biscuits. The same techniques can be used to measure skin sensitivity to sticking plaster, detect counterfeit drugs and packaging and gain insight into historical artefacts such as medieval manuscripts and weapons.
The VideometerLab 3 takes 19 images at 19 specific wavelengths in ultraviolet, visible and infrared light. With multivariate statistical analysis we can reveal hidden patterns in our 19-dimension colour space and find information that would be otherwise 'invisible' to our human eyes.
Plenary lecture of the XIII SBPMat (Brazilian MRS) meeting, given on September 30th 2014 by Karl Leo, professor of optoelectronics at Dresden University of Technology (Germany) and director of the Solar and Photovoltaic Engineering Research Center at KAUST (Saudi Arabia).
Energy storage phosphors @ Phosphor Global Summit 2019Philippe Smet
Presentation on opportunities and limitations of energy storage phosphors, which can be used for glow-in-the-dark roads or safety illumination. Loss mechanisms in phosphors. Presented at the Phosphor Global Summit and Quantum Dot Forum 2019 in San Diego, La Jolla, California. March 19-21.
ICL2017 Counting the photons - persistent phosphorsPhilippe Smet
Talk "Squeezing the energy out of the traps" presented at the 18th International Conference on Luminescence (ICL), August 31 2017. Describes a validated method to estimate the number of traps in storage phosphors, by embedding the phosphor in a polymer layer and counting the emitted photons during the afterglow decay. Work performed at LumiLab (Ghent University) and Concordia University.
History of lighting | quantum dots | PhonsiPhilippe Smet
Talk given at the MSCA Phonsi Summer School in Fréjus, France, May 22 2017. Contains historical overview of lighting technologies, key metrics in lighting. Focus on LED based lighting, with RGB, phosphor converted and quantum dot based LEDs.
ML-3 - Persistent Phosphors under PressurePhilippe Smet
Slides from plenary talk at the Third Conference on Mechanoluminescence and Novel structural health diagnosis, Hong Kong, December 15-17 2017. Covers absolute trapping capacity of persistent phosphors, the number and nature of energy traps and ML in selected compounds (BaSi2O2N2:Eu and CaZnOS:Mn).
EMRS 2018 Replacing rare earth ions in LEDs (?)Philippe Smet
Two decades after the development of the blue light-emitting diode (LED), LEDs have quickly established themselves as the lighting technology of the future. The high efficiency, spectral tunability, lack of toxic compounds and a small footprint makes them far more attractive than other lighting technologies. The high efficiency, now well exceeding 100 lum/W in commercial products, has still the margin to double, promising a strong reduction in electricity consumption.
White LEDs are commonly based on a blue LED, combined with luminescent materials, or phosphors, which convert part of the blue light to longer wavelengths, the mixture providing white light. Besides the workhorse Y3Al5O12:Ce (YAG:Ce, yielding yellow emission), europium doped phosphors are used to provide e.g. the red emission required for warm-white LEDs.
Six main requirements for LED phosphors are discussed and used to explain the discrepancy between the high number of compositions described in literature and the handful of actually used compounds, being almost uniquely based on rare earth ions as luminescent center [1]. Alternative materials avoiding the use of rare earth ions are discussed, including Mn4+ doped fluorides phosphors (e.g. K2SiF6:Mn4+ [2]) and quantum dots. Finally, the impact of phosphor geometries on phosphor use, including remote phosphor applications, are discussed.
[1] Smet PF and Joos JJ, Nat. Mater. 16 (2017) 500.
[2] Sijbom H et al, Opt. Mater. Exp. 7 (2017) 3332.
Defects in energy storage phosphors: friends or enemies? (PRE19 workshop)Philippe Smet
Plenary talk presented at the PRE19 workshop (Photoluminescence in Rare Earths: Photonic Materials and Devices) in Nice, France, on September 4. Dealing with persistent luminescence, afterglow, mechanoluminescence, traps, defects and thermoluminescence. Overview of the activities of the LumiLab research in the past 10 years.
The Ministry of Agriculture and Forestry organized a Finnish-Swedish Forest Friends Forever Conference in Hanaholmen, Espoo on 17-18 April. The purpose of the conference was to thank Sweden for the gift in honour of Finland’s 100 years of independence and to further enhance Finnish-Swedish cooperation in research and innovation and in forest policy.
Espoo, 17.–18.4.2018
Room-temperature emission at telecom wavelengths from silicon photonic crysta...Roberto Lo Savio
Light emission in crystalline silicon is the fundamental goal for the development of an all-silicon device showing efficient infrared emission at room temperature. The exploitation of optically active structural defects that generates sub-bandgap luminescence is the strategy explored here to make silicon an efficient infrared emitter around 1.5 μm.
Plenary lecture of the XIII SBPMat (Brazilian MRS) meeting, given on September 30th, 2014, in João Pessoa (Brazil) by Sir Colin Humphreys, Professor at University of Cambridge (U.K.).
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Multispectral imaging in Forensics with VideometerLab 3Adrian Waltho
Multispectral imaging provides valuable information on the quality and safety of a vast array of materials from pharmaceuticals to raw meat and burned biscuits. The same techniques can be used to measure skin sensitivity to sticking plaster, detect counterfeit drugs and packaging and gain insight into historical artefacts such as medieval manuscripts and weapons.
The VideometerLab 3 takes 19 images at 19 specific wavelengths in ultraviolet, visible and infrared light. With multivariate statistical analysis we can reveal hidden patterns in our 19-dimension colour space and find information that would be otherwise 'invisible' to our human eyes.
Plenary lecture of the XIII SBPMat (Brazilian MRS) meeting, given on September 30th 2014 by Karl Leo, professor of optoelectronics at Dresden University of Technology (Germany) and director of the Solar and Photovoltaic Engineering Research Center at KAUST (Saudi Arabia).
Energy storage phosphors @ Phosphor Global Summit 2019Philippe Smet
Presentation on opportunities and limitations of energy storage phosphors, which can be used for glow-in-the-dark roads or safety illumination. Loss mechanisms in phosphors. Presented at the Phosphor Global Summit and Quantum Dot Forum 2019 in San Diego, La Jolla, California. March 19-21.
ICL2017 Counting the photons - persistent phosphorsPhilippe Smet
Talk "Squeezing the energy out of the traps" presented at the 18th International Conference on Luminescence (ICL), August 31 2017. Describes a validated method to estimate the number of traps in storage phosphors, by embedding the phosphor in a polymer layer and counting the emitted photons during the afterglow decay. Work performed at LumiLab (Ghent University) and Concordia University.
History of lighting | quantum dots | PhonsiPhilippe Smet
Talk given at the MSCA Phonsi Summer School in Fréjus, France, May 22 2017. Contains historical overview of lighting technologies, key metrics in lighting. Focus on LED based lighting, with RGB, phosphor converted and quantum dot based LEDs.
ML-3 - Persistent Phosphors under PressurePhilippe Smet
Slides from plenary talk at the Third Conference on Mechanoluminescence and Novel structural health diagnosis, Hong Kong, December 15-17 2017. Covers absolute trapping capacity of persistent phosphors, the number and nature of energy traps and ML in selected compounds (BaSi2O2N2:Eu and CaZnOS:Mn).
EMRS 2018 Replacing rare earth ions in LEDs (?)Philippe Smet
Two decades after the development of the blue light-emitting diode (LED), LEDs have quickly established themselves as the lighting technology of the future. The high efficiency, spectral tunability, lack of toxic compounds and a small footprint makes them far more attractive than other lighting technologies. The high efficiency, now well exceeding 100 lum/W in commercial products, has still the margin to double, promising a strong reduction in electricity consumption.
White LEDs are commonly based on a blue LED, combined with luminescent materials, or phosphors, which convert part of the blue light to longer wavelengths, the mixture providing white light. Besides the workhorse Y3Al5O12:Ce (YAG:Ce, yielding yellow emission), europium doped phosphors are used to provide e.g. the red emission required for warm-white LEDs.
Six main requirements for LED phosphors are discussed and used to explain the discrepancy between the high number of compositions described in literature and the handful of actually used compounds, being almost uniquely based on rare earth ions as luminescent center [1]. Alternative materials avoiding the use of rare earth ions are discussed, including Mn4+ doped fluorides phosphors (e.g. K2SiF6:Mn4+ [2]) and quantum dots. Finally, the impact of phosphor geometries on phosphor use, including remote phosphor applications, are discussed.
[1] Smet PF and Joos JJ, Nat. Mater. 16 (2017) 500.
[2] Sijbom H et al, Opt. Mater. Exp. 7 (2017) 3332.
Defects in energy storage phosphors: friends or enemies? (PRE19 workshop)Philippe Smet
Plenary talk presented at the PRE19 workshop (Photoluminescence in Rare Earths: Photonic Materials and Devices) in Nice, France, on September 4. Dealing with persistent luminescence, afterglow, mechanoluminescence, traps, defects and thermoluminescence. Overview of the activities of the LumiLab research in the past 10 years.
The Ministry of Agriculture and Forestry organized a Finnish-Swedish Forest Friends Forever Conference in Hanaholmen, Espoo on 17-18 April. The purpose of the conference was to thank Sweden for the gift in honour of Finland’s 100 years of independence and to further enhance Finnish-Swedish cooperation in research and innovation and in forest policy.
Espoo, 17.–18.4.2018
Room-temperature emission at telecom wavelengths from silicon photonic crysta...Roberto Lo Savio
Light emission in crystalline silicon is the fundamental goal for the development of an all-silicon device showing efficient infrared emission at room temperature. The exploitation of optically active structural defects that generates sub-bandgap luminescence is the strategy explored here to make silicon an efficient infrared emitter around 1.5 μm.
Plenary lecture of the XIII SBPMat (Brazilian MRS) meeting, given on September 30th, 2014, in João Pessoa (Brazil) by Sir Colin Humphreys, Professor at University of Cambridge (U.K.).
Short and comprehensive manual to extend your local matlab with a high performance computing cluster of NVidia tesla's 2070 graphical processing units.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
In light microscopy, illuminating light is passed through the sample as uniformly as possible over the field of view. For thicker samples, where the objective lens does not have sufficient depth of focus, light from sample planes above and below the focal plane will also be detected. The out of focus light will add blur to the image reducing the resolution. In fluorescence microscopy, any dye molecules in the field of view will be stimulated, including those in out-of-focus planes. Confocal microscopy provides a means of rejecting the out-of-focus light from the detector such that it does not contribute blur to the images being collected. This technique allows for high-resolution imaging in thick tissues.
In a confocal microscope, the illumination and detection optics are focused on the same diffraction limited spot in the sample, which is the only spot imaged by the detector during a confocal scan. To generate a complete image, the spot must be moved over the sample and data collected point by point.
A significant advantage of the confocal microscope is the optical sectioning provided, which allows for 3D reconstruction of a sample from high-resolution stacks of images. The primary functions of a confocal microscope are to produce a point source of light and reject out-of-focus light, which provides the ability to image deep into tissues with high resolution, and optical sectioning for 3D reconstructions of imaged samples. The basic principle include illumination and detection optics are focused on the same diffraction-limited spot, which is moved over the sample to build the complete image on the detector. The entire field of view is illuminated during confocal imaging, anything outside the focal plane contributes little to the image, lessening the haze observed in standard light microscopy with thick and highly-scattering samples, and providing optical sectioning.
S IGNAL A ND I MAGE P ROCESSING OF O PTICAL C OHERENCE T OMOGRAPHY AT 1310 NM...sipij
OCT is a recently developed optical interferometric
technique for non-invasive diagnostic medical imag
ing
in vivo; the most sensitive optical imaging modalit
y.OCT finds its application in ophthalmology, blood
flow
estimation and cancer diagnosis along with many non
biomedical applications. The main advantage of
OCT is its high resolution which is in
μ
m range and depth of penetration in mm range. Unlik
e other
techniques like X rays and CT scan, OCT does not co
mprise any x ray source and therefore no radiations
are involved. This research work discusses the basi
cs of spectral domain OCT (SD-OCT), experimental
setup, data acquisition and signal processing invol
ved in OCT systems. Simulation of OCT involving
modelling and signal processing, carried out on Lab
VIEW platform has been discussed. Using the
experimental setup, some of the non biomedical samp
les have been scanned. The signal processing and
image processing of the scanned data was carried ou
t in MATLAB and Lab VIEW, some of the results thus
obtained have been discussed in the end
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
De-mystifying Zero to One: Design Informed Techniques for Greenfield Innovati...
Sumerschool DPI 2011 Quedlinburg
1. Summerschool Quedlinburg 2011
Image Scanning Microscopy (ISM)
Superresolution Optical Fluctuation Imaging (SOFI)
Dirk Hähnel, Jörg Enderlein
III. Institute of Physics – Biophysics
Georg-August-University Göttingen
Quedlinburg 26th Sep. 2011
2. Introduction
Functional requirements:
Usage of conventional fluorophores
Low laser power intensity
3D imaging
Multi color
Objective:
Increase the resolution without modifying size of the confocal spot
Avoiding techniques which use blinking molecule behavior?
2 Quedlinburg 26th Sep. 2011
3. 3
Lateral Resolution Limit of Standard Light Microscopy
Emission is considered as a planar wave from point-like-source
Using pure diffraction optics
Resolution limit at a phase difference of π/2
N.A. = n∙sinq
Quedlinburg 26th Sep. 2011
l
2n∙sinq
q
objective
4. Confocal Scanning Microscopy
Confocal scanning uses diffraction limited excitation volume
Structured excitation but gives away spatial information on the
detection side, which contains all Fourier modes from excitation
Quedlinburg 26th Sep. 2011
5. Structured Illumination Microscopy
Scanning periodic excitation over a sample
periodic image
uniform image
Quedlinburg 26th Sep. 2011
= l = l
min 4 sin 4N.A.
y
n
Q
two-fold enhancement
in resolution
6. Image Scanning Microscopy - Setup
Enhancement of a standard confocal setup
Replacing point-detector by EMCCD
Excitation intensity detection is optional
Quedlinburg 26th Sep. 2011
7. Image Scanning Microscopy - Detection
Image of PSF on the Sensorchip
4-dim data array contains:
Pixel x on CCD-Chip
Pixel y on CCD-Chip
Position x – Confocal sample
Position y – Confocal sample
Each pixel acts like a small confocal aperture for a two-dimensional
image
Quedlinburg 26th Sep. 2011
8. Image Scanning Microscopy – Image
Fluorescent bead imaging
Increase of contrast and resolution
Intensity profile of a single
fluorescent bead
*scalebar indicates 1 mm
Quedlinburg 26th Sep. 2011
9. Optical Saturation Microscopy
Using saturation of the excited state
Taking measurements on at least two different intensity-levels
Archiving the higher harmonic in the Fourier-space
Quedlinburg 26th Sep. 2011
10. Otical Saturation Microscopy
Quedlinburg 26th Sep. 2011
Results
Confocal image Optical saturation microscopy image
Yeast cell with GFP-labeled Ato1p membrane protein
From:
J. Humpolickova, A. Benda and J. Enderlein, Biophys. Journal, 2009 (97), 2623–2629.
11. Drawbacks and Advantages
Drawbacks:
Optical quality of components
Chromatic aberration
Data handling
Scan speed
“Step and settle” on each pixel required
Limited camera speed
Automation requires nanosecond input/output timing
Advantages:
Any dye works
Excitation power can be lowered
3D-capability
Multicolor
Quedlinburg 26th Sep. 2011
12. Status of Implementation
Image scanning microscopy
Resolution increase factor of 1.75-1.80 compared to confocal
imaging with ISM-technique
Theoretically possible is a factor of 2
Optical saturation microscopy
Implementation completed
Next steps
Combination with Dual-Excitation-Technique
Work on possible resolution increase up to factor 3
Quedlinburg 26th Sep. 2011
13. Superresolution Optical Fluctuation Imaging (SOFI)
The fluorescent label has to exhibit at least two different emission states. For
example, these states can be a fluorescent and a non-fluorescent one, but in
principle any two or more states which are optically distinguishable will do.
Different emitters have to switch between states repeatedly and independently
from each other.
Quedlinburg 26th Sep. 2011
19. Fourier filtering on 2nd order QD625 labelled 3T3 cell SOFI image
Quedlinburg 26th Sep. 2011
20. Conclusion - ISM
Combination of two techniques:
Structured illumination and detection
Optical saturation
Multicolor
3D Imaging
Any probes
Easy enhance resolution of standard confocal microscopes
Get super-resolution with “conventional” fluorophores
Working on enhancement of resolution up to factor 3
Quedlinburg 26th Sep. 2011
21. Conclusion - SOFI
Implementation of SOFI is simple
It is inherently 3D
It is background eliminating
It works on all blinking probes (i.e. almost all probes)
It works on all types of microscope
Resolution is not limited to pixel size
It works not only on fluorescence
Quedlinburg 26th Sep. 2011