The document presents a wavelet transform based application for analyzing seismic waves. It discusses analyzing the performance of an algorithm for seismic signal processing using continuous wavelet transforms. The algorithm is simulated and tested on seismic data with conclusions drawn regarding the results. Key steps of the algorithm include preprocessing the data, applying a multiresolution wavelet filter, detecting signal onsets, and analyzing body and surface wave dispersion and polarization.
Interferometer: An insight in Gravitational WavesTamoghna Saha
Hello all. In this presentation, I have described the basic principle of Interferometer and gave a brief description of Gravitational Wave that was discovered recently by LIGO (Laser Intereferometer Gravitational Wave Observatory). I hope you have liked it.
3 tesla mri, its physics, advantages and disadvantages, its comparison with 1.5 tesla mri scanner, clinical applications of 3 tesla mri, various artifacts related to 3 tesla, physics of silent mri, advantages of silent mri
Dft based individual extraction of steganographic compression of imageseSAT Journals
Abstract A Novel scheme of Separable Extraction of concealed data and compressed image is proposed adopting a transform based compression over the encrypted data. Reversible data hiding is branched under Steganography. In this reversible data hiding the art of concealing a secret data over the cover image is practiced. More than that, the main ingredients that play the key role are encryption key and the data hiding key, the compression is performed in between the two processes i.e., encryption and data hiding, to create a spare space to accommodate the secret data. The main aim of this proposed scheme is to limit the distortion and to enhance a wide space for concealing of the secret data i.e., to increase the embedding rate. The compression here classified into lossy and lossless. Lossy compression best suits for image and audio (telephone conversation, etc.) whereas lossless compression needed in the text and videos. Hence to perform the lossless compression over a stegomized image and improve its secrecy, DFT is performed after Encryption. Keywords: DFT, Data Embedding, RDH, Separable RDH, Compression
The following resources come from the 2009/10 B.Sc in Media Technology and Digital Broadcast (course number 2ELE0076) from the University of Hertfordshire. All the mini projects are designed as level two modules of the undergraduate programmes.
Interferometer: An insight in Gravitational WavesTamoghna Saha
Hello all. In this presentation, I have described the basic principle of Interferometer and gave a brief description of Gravitational Wave that was discovered recently by LIGO (Laser Intereferometer Gravitational Wave Observatory). I hope you have liked it.
3 tesla mri, its physics, advantages and disadvantages, its comparison with 1.5 tesla mri scanner, clinical applications of 3 tesla mri, various artifacts related to 3 tesla, physics of silent mri, advantages of silent mri
Dft based individual extraction of steganographic compression of imageseSAT Journals
Abstract A Novel scheme of Separable Extraction of concealed data and compressed image is proposed adopting a transform based compression over the encrypted data. Reversible data hiding is branched under Steganography. In this reversible data hiding the art of concealing a secret data over the cover image is practiced. More than that, the main ingredients that play the key role are encryption key and the data hiding key, the compression is performed in between the two processes i.e., encryption and data hiding, to create a spare space to accommodate the secret data. The main aim of this proposed scheme is to limit the distortion and to enhance a wide space for concealing of the secret data i.e., to increase the embedding rate. The compression here classified into lossy and lossless. Lossy compression best suits for image and audio (telephone conversation, etc.) whereas lossless compression needed in the text and videos. Hence to perform the lossless compression over a stegomized image and improve its secrecy, DFT is performed after Encryption. Keywords: DFT, Data Embedding, RDH, Separable RDH, Compression
The following resources come from the 2009/10 B.Sc in Media Technology and Digital Broadcast (course number 2ELE0076) from the University of Hertfordshire. All the mini projects are designed as level two modules of the undergraduate programmes.
The following resources come from the 2009/10 B.Sc in Media Technology and Digital Broadcast (course number 2ELE0073) from the University of Hertfordshire. All the mini projects are designed as level two modules of the undergraduate programmes.
Spatially adiabatic frequency conversion in opto-electro-mechanical arraysOndrej Cernotik
Optoelectromechanical systems offer a promising route towards frequency conversion between microwaves and light and towards building quantum networks of superconducting circuits. Current theoretical and experimental efforts focus on approaches based on either optomechanically induced transparency or adiabatic passage. The former has the advantage of working with time-independent control but only in a limited bandwidth (typically much smaller than the cavity linewidth); the latter can, in principle, be used to increase the bandwidth but at the expense of working with time-dependent control fields and with strong optomechanical coupling. In my presentation, I will show that an array of optoelectromechanical transducers can overcome this limitation and reach a bandwidth that is larger than the cavity linewidth. The coupling rates are varied in space throughout the array so that a mechanically dark mode of the propagating fields adiabatically changes from microwave to optical or vice versa. This strategy also leads to significantly reduced thermal noise with the collective optomechanical cooperativity being the relevant figure of merit. I will also demonstrate that, remarkably, the bandwidth enhancement per transducer element is largest for small arrays. With these features the scheme is particularly relevant for improving the conversion bandwidth in state-of-the-art experimental setups.
Contents
1 Introduction
Time
vs.
Frequency domain
Superposition
2 The Electromagnetic Spectrum
3 Frequency Measurement
Instrumentation
The Oscilloscope
Real-‐Time Spectrum Analyzers
The Swept Superheterodyne
Receiver
Attenuator
Preamplifier
Preselection/Lo Pass Filter
Mixer
Local Oscillator
(LO)
The
IF Filter
The Analog-‐to-‐Digital Converter (ADC)
Resolution
Bandwidth
(RBW)
Filter
The Details of a Sweep
The Envelope
Detector
Video Bandwidth (VBW)
Noise Sweep Speed
The Vector Network Analyzer
4 Spectrum Monitoring
with
Real-‐time analysis
Real Time Capture
and Analysis Probability of Intercept Visualizations
Measurement of Acceleration & Vibration :
Different simple Instruments
Principle of seismic-instruments
Geometric COSMOLOGY/PACIFIC RING OF FIRE
Vibro meter and Accelerometer
Le nuove frontiere dell'AI nell'RPA con UiPath Autopilot™UiPathCommunity
In questo evento online gratuito, organizzato dalla Community Italiana di UiPath, potrai esplorare le nuove funzionalità di Autopilot, il tool che integra l'Intelligenza Artificiale nei processi di sviluppo e utilizzo delle Automazioni.
📕 Vedremo insieme alcuni esempi dell'utilizzo di Autopilot in diversi tool della Suite UiPath:
Autopilot per Studio Web
Autopilot per Studio
Autopilot per Apps
Clipboard AI
GenAI applicata alla Document Understanding
👨🏫👨💻 Speakers:
Stefano Negro, UiPath MVPx3, RPA Tech Lead @ BSP Consultant
Flavio Martinelli, UiPath MVP 2023, Technical Account Manager @UiPath
Andrei Tasca, RPA Solutions Team Lead @NTT Data
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
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Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
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/
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
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
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Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
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In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Welocme to ViralQR, your best QR code generator.ViralQR
Welcome to ViralQR, your best QR code generator available on the market!
At ViralQR, we design static and dynamic QR codes. Our mission is to make business operations easier and customer engagement more powerful through the use of QR technology. Be it a small-scale business or a huge enterprise, our easy-to-use platform provides multiple choices that can be tailored according to your company's branding and marketing strategies.
Our Vision
We are here to make the process of creating QR codes easy and smooth, thus enhancing customer interaction and making business more fluid. We very strongly believe in the ability of QR codes to change the world for businesses in their interaction with customers and are set on making that technology accessible and usable far and wide.
Our Achievements
Ever since its inception, we have successfully served many clients by offering QR codes in their marketing, service delivery, and collection of feedback across various industries. Our platform has been recognized for its ease of use and amazing features, which helped a business to make QR codes.
Our Services
At ViralQR, here is a comprehensive suite of services that caters to your very needs:
Static QR Codes: Create free static QR codes. These QR codes are able to store significant information such as URLs, vCards, plain text, emails and SMS, Wi-Fi credentials, and Bitcoin addresses.
Dynamic QR codes: These also have all the advanced features but are subscription-based. They can directly link to PDF files, images, micro-landing pages, social accounts, review forms, business pages, and applications. In addition, they can be branded with CTAs, frames, patterns, colors, and logos to enhance your branding.
Pricing and Packages
Additionally, there is a 14-day free offer to ViralQR, which is an exceptional opportunity for new users to take a feel of this platform. One can easily subscribe from there and experience the full dynamic of using QR codes. The subscription plans are not only meant for business; they are priced very flexibly so that literally every business could afford to benefit from our service.
Why choose us?
ViralQR will provide services for marketing, advertising, catering, retail, and the like. The QR codes can be posted on fliers, packaging, merchandise, and banners, as well as to substitute for cash and cards in a restaurant or coffee shop. With QR codes integrated into your business, improve customer engagement and streamline operations.
Comprehensive Analytics
Subscribers of ViralQR receive detailed analytics and tracking tools in light of having a view of the core values of QR code performance. Our analytics dashboard shows aggregate views and unique views, as well as detailed information about each impression, including time, device, browser, and estimated location by city and country.
So, thank you for choosing ViralQR; we have an offer of nothing but the best in terms of QR code services to meet business diversity!
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
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1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
A wavelet transform based application for seismic waves. Analysis of the performance.
1. A Wavelet Transform based
application for seismic waves.
Analysis of the performance.
Telecommunication Engineering Thesis
Author: Pedro Cerón Colás
Fraunhofer IIS, Erlangen December 9th 2013
2. General outline of the presentation
Introduction
Method and
Process
Simulation of
the algorithm
Conclusions
3. Overview of the problem
Geophysics
field
Design of Matlab
algorithms
Complex
Continuous
Wavelet
Transform
Bio
_QRS Complex, “Biomedical Signal
Processing”, Sorno & Laguna.
_Circular buffer 3rd FIR filter. “Sound digital
processing”, Rocchesso.
Sound
Procces
ing
But… Where can we apply the
Wavelet Transform?
4. Some geophysical issues
•
3 components:
EW, NS, Z (transverse)
•
Body Waves (P and S
waves) and Surphase
Waves (Rayleigh and
Love).
•
Seismic Spectrum:
0.001-10hz [1].
•
Frequency
characterization:
Spectrum overlaping of
Body and Surphase
Waves .
Image taken from Dr. José Ignacio Badal Nicolás (Faculty
of Geologics, Zaragoza University). Shared resource.
[1] “Fundamentals of Geophysics” Agustín Udías & Julio
Mezcua. Chap.13
5. General Outline of the
presentation
Introduction
Method and
Process
Simulation of
the algorithm
Conclusions
6. Method and process
D
A
T
A
B
A
S
E
S
Conversion
of the
signals
•
•
•
Preprocessing:
Correction
Data format? SAC or Mseed
Compressed Info?
STEIM1, STEIM2
Not compressed Info?
ASCII, float, integer…
Processing
step:
Filtering
Multiresolution
filter (WT)
Matlab
.mat
Onset
detection
Body Waves
Surphase
Waves
Polarization
analysis
7. Seismic formats: SAC and MiniSEED
Word
Type
NAMES
o
0
F
DELTA
DEPMIN DEPMAX SCALE
ODELTA
5
F
B
E
O
A
INTERN
AL
10
F
T0
T1
T2
T3
T4
15
F
T5
T6
T7
T8
T9
20
F
F
RESP0
RESP1
RESP2
RESP3
25
F
RESP4
RESP5
RESP6
RESP7
RESP8
30
F
RESP9
STLA
STLO
STEL
STDP
35
F
EVLA
EVLO
EVEL
EVDP
MAG
40
F
USER0
USER1
USER2
USER3
USER4
45
F
USER5
USER6
USER7
USER8
USER9
50
F
DIST
AZ
BAZ
GCARC
INTERN
AL
55
F
INTERN
AL
DEPME
N
CMPAZ
CMPINC
XMINIM
UM
60
F
XMAXIM YMINIM YMAXIM
UNUSED UNUSED
UM
UM
UM
65
F
UNUSED UNUSED UNUSED UNUSED UNUSED
70
I
NZYEAR
NZHOUR NZMIN
NZSEC
75
I
NZMSEC NVHDR
NORID
NEVID
NPTS
80
I
INTERN
AL
NWFID
NXSIZE
NYSIZE
UNUSED
85
I
IFTYPE
IDEP
IZTYPE
UNUSED IINST
90
I
ISTREG
IEVREG
IEVTYP
IQUAL
95
I
IMAGTY
P
IMAGSR
UNUSED UNUSED UNUSED
C
100
I
UNUSED UNUSED UNUSED UNUSED UNUSED
105
L
LEVEN
LPSPOL
110
K
KSTNM
KEVNM*
116
K
KHOLE
KO
KA
122
K
KT0
KT1
KT2
128
K
KT3
KT4
KT5
134
K
KT6
KT7
KT8
140
K
KT9
KF
KUSER0
146
K
KUSER1
KUSER2
KCMPN
M
152
K
KNETWK KDATRD KINST
NZJDAY
o
o
LOVROK LCALDA
o
ISYNTH
UNUSED
Algorithms to decode the
information.
Tables taken from:
http://www.iris.edu/software/sac/manual/file_format.html, november 2013.
SEED manual v.2.4, B appendix.
8. Compressional techniques: STEIM 1 and
STEIM 2
STEIM 2:More number of
possibilities (8) with dnib.
Algorithms to decompress the
information.
Tables taken from:
SEED reference manual (version 2.4). B appendix. November 2013.
10. Multiresolution filtering using the Wavelet
Transform
Amplitude
Mathematical tool
Phase
Inst. Freq.
Freq?
Input
(Div.)
Multiresolution filter: www.sciencedirect.com, nov.
2013.
Plot of a .cwt matrix in Matlab.
11. Prepocessing stage: Filtering
How?
Computations are done directly to
the .cwt matrix
• Band pass filtering.
• Once we have seen in the .cwt plot where we can locate
the parts of the signal with higher energetic
contributions, we can remove the unnecesary bands
(coefficients).
• Remove DC level and high frequency seismic noise.
12. Onset detector (body waves)
What’s the concept?
Body Waves tend to be at higher frequencies in the
octaves (higher divisions) than Surface waves.
Energetic Criteria:
Mk1
Mk2
Variability Criteria:
Finer
adjustment
Low
frequency
envelope
High
Frequency
envelope
13. Onset detector (surphase waves)
What’s the
concept?
Surphase Waves tend to be at lower
frequencies every octaves
Derivative
Derivative + envolope
We can roughly locate
where it’s located the
onset of the Surphase
waves.
14. Surphase wave: Dispersion
What is the distinctive element that define
the Surphase Waves?
How can be use the wavelet coefficients to
analyse this phenomenon?
.cwt
matrix
Dispersion
15. Arrival times
Polarization analysis
P wave onset
S wave onset
Surphase wave
onset
Transformation of 3
axis into 2:
http://www.motionscript.com/mastering-expressions/randomsphere.html, november 2013
•
Polarization of P, S, Love
and Rayleigh waves?
16. General Outline of the
presentation
Introduction
Method and
Process
Simulation of
the algorithm
Conclusions
17. Time errors: First onset
Inner
structure
problem
3.5
3
2.5
Low SNR
2
1.5
1
0.5
0
1
2
3
4
5
6
7
8
9
10
11
12
19. General Outline of the
presentation
Introduction
Method and
Process
Simulation of
the algorithm
Conclusions
20. Conclusions
• Algoritms easy to apply (engineering principles:
energy, variability, derivatives…)
• Very satisfactory results.
• Automatic algorithm: Input (signal).
• Outputs are specially interesting in terms of the signal processing
and geophysic field: Time-Frequency analysis, onsets, analysis of
the dispersion phenomena, polarization.
• Formats (SAC and Miniseed) and compressional techniques.
• The multiresolution analysis is specially appropiate for the nonstationary signals where we don’t know (in advance) where are
the frequency bands of interest.
FIR of how many coefficients and what are the frequencies
of the design?