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Spatial and frequency selection of waves in pseudoperiodic slow wave structures
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Foster City high School lives by its motto of providing premier education to all in order to instill the qualities of self-reliance, accountability and practical knowledge that will help them to survive in the cutthroat competition posed by the modern job market.
Foster City High School- Empowering You to Excel Beyond Limits
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A principle of selection of modes and their spatial harmonics in periodic waveguides and, in particular, in spatially developed slowing systems for multibeam traveling-wave tubes (TWTs) is elaborated. The essence of the principle is in the following: varying along the length of the system its period and at least one more parameter that determines the phase shift per period, one can provide constant phase velocity of one spatial harmonic and destroy other spatial harmonics, i.e., reduce their amplitudes substantially. In this case, variations of the period may be significant, and the slowing system becomes nonuniform, or pseudoperiodic; namely, one of the spatial harmonics remains the same as in the initial periodic structure. Relationships are derived for the amplitudes of the spatial-wave harmonics, interaction coefficient, and coupling impedance of the pseudoperiodic system. The possibility of the mode selection in pseudoperiodic slowing systems when the synchronism condition is satisfied for the spatial harmonic of one mode is investigated. The efficiency of suppressing spurious spatial harmonics and modes for linear and abrupt variation of spacing is estimated. The elaborated principle of selection of spatial harmonics and modes is illustrated by an example of a two-section helical-waveguide slowing system.
Pseudoperiodic waveguides with selection of spatial harmonics and modes
Pseudoperiodic waveguides with selection of spatial harmonics and modes
Victor Solntsev
Planar spiral systems are shown to exist, in which a cylindrical wave has a constant radial phase velocity. The equation of such spirals is derived and its solution is obtained in elementary functions. It is established that these spirals include the logarithmic spirals as a special case; in the general case, however, they have a large variety of forms and in particular they have a limiting inside or outside radius. This makes it possible to use such spirals for building new slow-wave structures and antennas.
Planar spiral systems with waves of constant radial phase velocity
Planar spiral systems with waves of constant radial phase velocity
Victor Solntsev
The properties of the local coupling impedance that determines the efficiency of the electron–wave interaction in periodic slow-wave structures are investigated. This impedance is determined (i) through the char- acteristics of the electromagnetic field in a slow-wave structure and (ii) through the parameters of a two-port chain simulating the structure. The continuous behavior of the local coupling impedance in the passbands of slow-wave structures, at the boundaries of the passbands, and beyond the passbands is confirmed with the help of a waveguide–resonator model.
Investigation of the bandpass properties of the local impedance of slow wave ...
Investigation of the bandpass properties of the local impedance of slow wave ...
Victor Solntsev
The difference theory of excitation of periodic waveguides is used to derive the characteristic equation for electron waves formed during interaction of an electron flow with forward and counter-propagating electromagnetic waves of periodic waveguides (slowﱹwave structures). The derived characteristic equation describes interaction of electrons and waves in passbands and stopbands of periodic waveguides and contains known solutions for “smooth” slow-wave structures and resonator slow-wave structures near cutoff frequencies as particular cases. Several analytical solutions allowing comparison of amplification and propagation properties of electron waves inside and at the edges of passbands and stopbands of periodic waveguides are found.
Characteristic equation and properties of electron waves in periodic structures
Characteristic equation and properties of electron waves in periodic structures
Victor Solntsev
A linear theory of the discrete interaction of electron flows and electromagnetic waves in slow-wave structures (SWSs) is developed. The theory is based on the finite-difference equations of SWS excitation. The local coupling impedance entering these equations characterizes the field intensity excited by the electron flow in interaction gaps and has a finite value at SWS cutoff frequencies. The theory uniformly describes the electron–wave interaction in SWS passbands and stopbands without using equivalent circuits, a circumstance that allows considering the processes in the vicinity of cutoff frequencies and switching from the Cerenkov mechanism of interaction in a traveling-wave tube to the klystron mechanism when passing to SWS stopbands. The features of the equations of the discrete electron–wave interaction in pseudoperiodic SWSs are analyzed.
A generalized linear theory of the discrete electron–wave interaction in slow...
A generalized linear theory of the discrete electron–wave interaction in slow...
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A comparative analysis of the equations of discrete interaction of linear electron beams with the electromagnetic field of periodic and pseudoperiodic slow-wave structures (SWSs) is given. The analysis is based on the difference theory of excitation of SWSs. The possibility of unified description of interaction in both passbands and rejection bands of the systems is clarified. The description uses the electrodynamic param- eters determined from the characteristics of the electromagnetic field. Comparison of the processes of electron bunching in a given field of periodic and pseudoperiodic SWSs is made in the linear approximation. The com- parison verifies the selective properties of pseudoperiodic systems.
Analysis of the equations of discrete electron–wave interaction and electron ...
Analysis of the equations of discrete electron–wave interaction and electron ...
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Electron bunching processes in a carcinotrode (backwardﱹwave oscillator with selfﱹmodulation of electron emission) operating in the highﱹefficiency regime determined previously are investigated. The posﱹ sibility of obtaining an efficiency of about 80% is explained from the physical viewpoint.
Electron bunching in the optimal operating regime of a carcinotrode
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A principle of selection of modes and their spatial harmonics in periodic waveguides and, in particular, in spatially developed slowing systems for multibeam traveling-wave tubes (TWTs) is elaborated. The essence of the principle is in the following: varying along the length of the system its period and at least one more parameter that determines the phase shift per period, one can provide constant phase velocity of one spatial harmonic and destroy other spatial harmonics, i.e., reduce their amplitudes substantially. In this case, variations of the period may be significant, and the slowing system becomes nonuniform, or pseudoperiodic; namely, one of the spatial harmonics remains the same as in the initial periodic structure. Relationships are derived for the amplitudes of the spatial-wave harmonics, interaction coefficient, and coupling impedance of the pseudoperiodic system. The possibility of the mode selection in pseudoperiodic slowing systems when the synchronism condition is satisfied for the spatial harmonic of one mode is investigated. The efficiency of suppressing spurious spatial harmonics and modes for linear and abrupt variation of spacing is estimated. The elaborated principle of selection of spatial harmonics and modes is illustrated by an example of a two-section helical-waveguide slowing system.
Pseudoperiodic waveguides with selection of spatial harmonics and modes
Pseudoperiodic waveguides with selection of spatial harmonics and modes
Victor Solntsev
Planar spiral systems are shown to exist, in which a cylindrical wave has a constant radial phase velocity. The equation of such spirals is derived and its solution is obtained in elementary functions. It is established that these spirals include the logarithmic spirals as a special case; in the general case, however, they have a large variety of forms and in particular they have a limiting inside or outside radius. This makes it possible to use such spirals for building new slow-wave structures and antennas.
Planar spiral systems with waves of constant radial phase velocity
Planar spiral systems with waves of constant radial phase velocity
Victor Solntsev
The properties of the local coupling impedance that determines the efficiency of the electron–wave interaction in periodic slow-wave structures are investigated. This impedance is determined (i) through the char- acteristics of the electromagnetic field in a slow-wave structure and (ii) through the parameters of a two-port chain simulating the structure. The continuous behavior of the local coupling impedance in the passbands of slow-wave structures, at the boundaries of the passbands, and beyond the passbands is confirmed with the help of a waveguide–resonator model.
Investigation of the bandpass properties of the local impedance of slow wave ...
Investigation of the bandpass properties of the local impedance of slow wave ...
Victor Solntsev
The difference theory of excitation of periodic waveguides is used to derive the characteristic equation for electron waves formed during interaction of an electron flow with forward and counter-propagating electromagnetic waves of periodic waveguides (slowﱹwave structures). The derived characteristic equation describes interaction of electrons and waves in passbands and stopbands of periodic waveguides and contains known solutions for “smooth” slow-wave structures and resonator slow-wave structures near cutoff frequencies as particular cases. Several analytical solutions allowing comparison of amplification and propagation properties of electron waves inside and at the edges of passbands and stopbands of periodic waveguides are found.
Characteristic equation and properties of electron waves in periodic structures
Characteristic equation and properties of electron waves in periodic structures
Victor Solntsev
A linear theory of the discrete interaction of electron flows and electromagnetic waves in slow-wave structures (SWSs) is developed. The theory is based on the finite-difference equations of SWS excitation. The local coupling impedance entering these equations characterizes the field intensity excited by the electron flow in interaction gaps and has a finite value at SWS cutoff frequencies. The theory uniformly describes the electron–wave interaction in SWS passbands and stopbands without using equivalent circuits, a circumstance that allows considering the processes in the vicinity of cutoff frequencies and switching from the Cerenkov mechanism of interaction in a traveling-wave tube to the klystron mechanism when passing to SWS stopbands. The features of the equations of the discrete electron–wave interaction in pseudoperiodic SWSs are analyzed.
A generalized linear theory of the discrete electron–wave interaction in slow...
A generalized linear theory of the discrete electron–wave interaction in slow...
Victor Solntsev
A comparative analysis of the equations of discrete interaction of linear electron beams with the electromagnetic field of periodic and pseudoperiodic slow-wave structures (SWSs) is given. The analysis is based on the difference theory of excitation of SWSs. The possibility of unified description of interaction in both passbands and rejection bands of the systems is clarified. The description uses the electrodynamic param- eters determined from the characteristics of the electromagnetic field. Comparison of the processes of electron bunching in a given field of periodic and pseudoperiodic SWSs is made in the linear approximation. The com- parison verifies the selective properties of pseudoperiodic systems.
Analysis of the equations of discrete electron–wave interaction and electron ...
Analysis of the equations of discrete electron–wave interaction and electron ...
Victor Solntsev
Electron bunching processes in a carcinotrode (backwardﱹwave oscillator with selfﱹmodulation of electron emission) operating in the highﱹefficiency regime determined previously are investigated. The posﱹ sibility of obtaining an efficiency of about 80% is explained from the physical viewpoint.
Electron bunching in the optimal operating regime of a carcinotrode
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WSO2 Micro Integrator for Enterprise Integration in a Decentralized, Microser...
WSO2 Micro Integrator for Enterprise Integration in a Decentralized, Microser...
WSO2
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows. We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases. This video focuses on the deployment of external web forms using Jotform for Bonterra Impact Management. This solution can be customized to your organization’s needs and deployed to support the common use cases below: - Intake and consent - Assessments - Surveys - Applications - Program registration Interested in deploying web form automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Web Form Automation for Bonterra Impact Management (fka Social Solutions Apri...
Web Form Automation for Bonterra Impact Management (fka Social Solutions Apri...
Jeffrey Haguewood
This Slide deck talk about how FHIR is being used in Ayushman Bharat Digital Mission (ABDM). It introduces the readers to ABDM and also to FHIR Documents paradigm. This is part of FHIR India community Basics learning initiative.
Introduction to use of FHIR Documents in ABDM
Introduction to use of FHIR Documents in ABDM
Kumar Satyam
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Featured
https://www.hubspot.com/state-of-marketing · Scaling relationships and proving ROI · Social media is the place for search, sales, and service · Authentic influencer partnerships fuel brand growth · The strongest connections happen via call, click, chat, and camera. · Time saved with AI leads to more creative work · Seeking: A single source of truth · TLDR; Get on social, try AI, and align your systems. · More human marketing, powered by robots
2024 State of Marketing Report – by Hubspot
2024 State of Marketing Report – by Hubspot
Marius Sescu
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
Everything You Need To Know About ChatGPT
Everything You Need To Know About ChatGPT
Expeed Software
The realm of product design is a constantly changing environment where technology and style intersect. Every year introduces fresh challenges and exciting trends that mold the future of this captivating art form. In this piece, we delve into the significant trends set to influence the look and functionality of product design in the year 2024.
Product Design Trends in 2024 | Teenage Engineerings
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Pixeldarts
Mental health has been in the news quite a bit lately. Dozens of U.S. states are currently suing Meta for contributing to the youth mental health crisis by inserting addictive features into their products, while the U.S. Surgeon General is touring the nation to bring awareness to the growing epidemic of loneliness and isolation. The country has endured periods of low national morale, such as in the 1970s when high inflation and the energy crisis worsened public sentiment following the Vietnam War. The current mood, however, feels different. Gallup recently reported that national mental health is at an all-time low, with few bright spots to lift spirits. To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups. Technology For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did. While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis. Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad. Age and Gender When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same. Gen Z spends the most amount of time on social media, so the notion that social media negatively affects mental health appears to be correlated. Unfortunately, Gen Z is also the generation that’s least comfortable discussing mental health concerns with healthcare professionals. Only 40% of them state they’re comfortable discussing their issues with a professional compared to 60% of Millennials and 65% of Boomers. Race Affects Attitudes As seen in previous research conducted by ThinkNow, Asian Americans lag other groups when it comes to awareness of mental health issues. Twenty-four percent of Asian Americans believe that having a mental health issue is a sign of weakness compared to the 16% average for all groups. Asians are also considerably less likely to be aware of mental health services in their communities (42% vs. 55%) and most likely to seek out information on social media (51% vs. 35%).
How Race, Age and Gender Shape Attitudes Towards Mental Health
How Race, Age and Gender Shape Attitudes Towards Mental Health
ThinkNow
This article is all about what AI trends will emerge in the field of creative operations in 2024. All the marketers and brand builders should be aware of these trends for their further use and save themselves some time!
AI Trends in Creative Operations 2024 by Artwork Flow.pdf
AI Trends in Creative Operations 2024 by Artwork Flow.pdf
marketingartwork
How our culture helps to save energy.
Skeleton Culture Code
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Materials from Pepsico for their presentation at the 2024 CAGNY conference. Made 2/21/24
PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024
Neil Kimberley
The deck from Contently’s popular Content Methodology webinar with Rebecca Lieb, Joe Lazauskas, and Ari Kepnes.
Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)
contently
Presented 1/4/2024 Visit Albert's List: https://bit.ly/findyournextjob
How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024
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A report by thenetworkone and Kurio. The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).
Social Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie Insights
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The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands. It’s important that you’re ready to implement new strategies in 2024. Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024. You’ll learn: - The latest trends in AI and automation, and what this means for an evolving paid search ecosystem. - New developments in privacy and data regulation. - Emerging ad formats that are expected to make an impact next year. Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape. If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024
Search Engine Journal
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world. With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively. The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage. Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience. See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers See the original article on Forbes here: http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary
SpeakerHub
Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world. Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance. For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age. Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd
Clark Boyd
a presentation to give to a programming class on how to land a 6 figure job right out of college, and how to prepare during and after school
Getting into the tech field. what next
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Tessa Mero
Lily Ray's MozCon talk from 2023 about how core updates work and how search intent plays a role.
Google's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search Intent
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Stop putting off having difficult conversations. Seven practical tips to ensure your next difficult conversation go smoothly.
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A brief introduction to DataScience with explaining of the concepts, algorithms, machine learning, supervised and unsupervised learning, clustering, statistics, data preprocessing, real-world applications etc. It's part of a Data Science Corner Campaign where I will be discussing the fundamentals of DataScience, AIML, Statistics etc.
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Christy Abraham Joy
Here's my presentation on by proven best practices how to manage your work time effectively and how to improve your productivity. It includes practical tips and how to use tools such as Slack, Google Apps, Hubspot, Google Calendar, Gmail and others.
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Vit Horky
The six step guide to practical project management If you think managing projects is too difficult, think again. We’ve stripped back project management processes to the basics – to make it quicker and easier, without sacrificing the vital ingredients for success. “If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.” Dr Andrew Makar, Tactical Project Management
The six step guide to practical project management
The six step guide to practical project management
MindGenius
A presentation for absolute beginners who have never touched TikTok and may be a bit scared of it!
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Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
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2024 State of Marketing Report – by Hubspot
2024 State of Marketing Report – by Hubspot
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Everything You Need To Know About ChatGPT
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Product Design Trends in 2024 | Teenage Engineerings
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How Race, Age and Gender Shape Attitudes Towards Mental Health
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AI Trends in Creative Operations 2024 by Artwork Flow.pdf
Skeleton Culture Code
Skeleton Culture Code
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PEPSICO Presentation to CAGNY Conference Feb 2024
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Content Methodology: A Best Practices Report (Webinar)
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How to Prepare For a Successful Job Search for 2024
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Social Media Marketing Trends 2024 // The Global Indie Insights
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Trends In Paid Search: Navigating The Digital Landscape In 2024
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5 Public speaking tips from TED - Visualized summary
ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd
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Getting into the tech field. what next
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Google's Just Not That Into You: Understanding Core Updates & Search Intent
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How to have difficult conversations
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Introduction to Data Science
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Time Management & Productivity - Best Practices
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The six step guide to practical project management
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Download now