Alexandros Zenonos, Ph.D.
London, England, United Kingdom
12K followers
500+ connections
About
I am an AI researcher and Senior Data Scientist, interested in solving real-world…
Articles by Alexandros
Contributions
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What do you do if you're struggling to choose the right AI software tools for natural language processing?
It depends on what the actual task is. And thus you start by truly understanding the (business) problem and what the desirable output would ideally look like. If you want to classify a paragraph into a number of classes versus if you want to assess how similar a sentence is to another. Or whether you want to summarise a text versus whether you want to understand the sentiment or the theme of a paragraph or even generate novel text. For each problem, there is not a single solution but at least you would limit the approaches or rather make some approaches more favourable as it is likely to yield better results far quicker.
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What does a machine learning consultant do?
As a machine learning consultant you need first of all to understand whether the client's problem is actually one that can be best tackled with machine learning. Many times a problem might be solved in other simpler ways. Also, you need to understand how big the task is, how many people are required to work on it for how long and what could the client realistically expect upon completion.
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What are the latest data mining techniques for staying ahead of the curve?
Deep learning is the technology underpinning all Large Language Models (LLMs) including the now infamous ChatGPT. The technology keeps evolving, maturing and lots of opportunities are opening in leveraging the technology for more and better models. Deep learning has been more prominently applied to unstructured data like text and images but it has a widespread usage. It takes a lot of data to train a model from scratch and a lot of computational resources like GPUs.
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What are the best ways to develop data science and machine learning skills while working abroad?
Do you assume you already work in the area or are you coming in data science with limited knowledge on the subject? Is the work abroad related to data science? As a complete beginner, it is important to learn the basics via taught courses and assignments. There is plenty of material out there that is free. The best way to learn something is by far applying what you learned in practice. You can participate in Kaggle competitions but these are rarely a true reflection of the data you would find working in industry.
Activity
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The Dangerous Claim of “If You Don’t Understand, It Doesn’t Matter” In an era where attention spans are dwindling, the internet is filled with a…
The Dangerous Claim of “If You Don’t Understand, It Doesn’t Matter” In an era where attention spans are dwindling, the internet is filled with a…
Liked by Alexandros Zenonos, Ph.D.
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Today Michael Pfeffer, Percy Liang and I are delighted to introduce a benchmark to test LLMs on real world clinical tasks. MedHELM comprises a…
Today Michael Pfeffer, Percy Liang and I are delighted to introduce a benchmark to test LLMs on real world clinical tasks. MedHELM comprises a…
Liked by Alexandros Zenonos, Ph.D.
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"The quality of your life is determined by the quality of your thoughts." – Marcus Aurelius
"The quality of your life is determined by the quality of your thoughts." – Marcus Aurelius
Liked by Alexandros Zenonos, Ph.D.
Experience
Education
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Imperial College London
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• Modules: Machine Learning, Machine Learning and Neural Computation, Intelligent Data and Probabilistic Inference, Computational Neurodynamics, Computer Vision, Multi-agent Systems, Knowledge Representation, Distributed Algorithms, Software Engineering for Industries
• Summer Project: Unsupervised Learning Approaches to Intention Recognition (Grade: 78%) -
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Research Topic: Coordinating measurements for environmental monitoring in uncertain participatory sensing settings
Research Group: Agents, Interaction and Complexity (Agents Research Group)
Supervisors: Prof. Nicholas R. Jennings (h-index:134) and Dr. Sebastian Stein
Project Name: ORCHID -
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Activities and Societies: 2010-2011 UCLU Cypriot Society Sports Officer
• Final Year Modules: Operating Systems, Computational Complexity, Networked Systems, Database and Information Management Systems, Technology Management and Professional Issues
• Final Year Individual Project: Hack into smokers’ behaviour: An investigation of smoking behaviour and promotion of behaviour change (Grade: 74%)
• Final Year Group Project: SocialSTREAM (Grade: 75%) -
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Licenses & Certifications
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Gaussian Prossess Summer School
Sheffield ML Group
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CCNA 1 - Networking Basics
CISCO
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CCNA 2 - Router and Routing Basics
CISCO
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Publications
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Coordinating Measurements in Uncertain Participatory Sensing Settings
Journal of Artificial Intelligence Research (JAIR)
Environmental monitoring allows authorities to understand the impact of potentially harmful phenomena, such as air pollution, excessive noise, and radiation. Recently, there has been considerable interest in participatory sensing as a paradigm for such large-scale data collection because it is cost-effective and able to capture more fine-grained data than traditional approaches that use stationary sensors scattered in cities. In this approach, ordinary citizens (non-expert contributors) collect…
Environmental monitoring allows authorities to understand the impact of potentially harmful phenomena, such as air pollution, excessive noise, and radiation. Recently, there has been considerable interest in participatory sensing as a paradigm for such large-scale data collection because it is cost-effective and able to capture more fine-grained data than traditional approaches that use stationary sensors scattered in cities. In this approach, ordinary citizens (non-expert contributors) collect environmental data using low-cost mobile devices. However, these participants are generally self-interested actors that have their own goals and make local decisions about when and where to take measurements. This can lead to highly inefficient outcomes, where observations are either taken redundantly or do not provide sufficient information about key areas of interest. To address these challenges, it is necessary to guide and to coordinate participants, so they take measurements when it is most informative. To this end, we develop a computationally-efficient coordination algorithm (adaptive Best-Match) that suggests to users when and where to take measurements. Our algorithm exploits probabilistic knowledge of human mobility patterns, but explicitly considers the uncertainty of these patterns and the potential unwillingness of people to take measurements when requested to do so. In particular, our algorithm uses a local search technique, clustering and random simulations to map participants to measurements that need to be taken in space and time. We empirically evaluate our algorithm on a real-world human mobility and air quality dataset and show that it outperforms the current state of the art by up to 24% in terms of utility gained.
Other authorsSee publication -
HealthyOffice: Mood Recognition At Work Using Smartphones and Wearable Sensors.
In Pervasive Computing and Communications Workshops (PERCOM Workshops), 2016 IEEE International Conference on, March 2016
We explore the possibility of using wearable devices for mood recognition in work environments. We propose a novel mood recognition framework that is able to identify five intensity levels for eight different types of moods. We evaluate our system in a small-scale user study where wearable sensing data is collected in an office environment.
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Coordinating Measurements for Air Pollution Monitoring in Participatory Sensing Settings.
In, 14th Int. Conference on Autonomous Agents and Multi-Agent Systems, Istanbul, TR, 04 - 08 May 2015.
Courses
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Computational Neurodynamics
421
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Computer Vision
418
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Distributed Algorithms
437
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Intelligent Data and Probabilistic Inference
493
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Knowledge Representation
491
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Machine Learning
395
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Machine Learning and Neural Computation
424
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Multi-agent Systems
474
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Software Engineering for Industries
475
Languages
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Greek
Native or bilingual proficiency
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English
Full professional proficiency
Recommendations received
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Join now to viewMore activity by Alexandros
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Ο Δήμος Πάφου τιμά τη μνήμη της Αναστασίας Αδαμίδου. To Δημοτικό Συμβουλίου Πάφου σε προχθεσινή συνεδρία του ημερ.24 Φεβρουαρίου 2025, αποφάσισε…
Ο Δήμος Πάφου τιμά τη μνήμη της Αναστασίας Αδαμίδου. To Δημοτικό Συμβουλίου Πάφου σε προχθεσινή συνεδρία του ημερ.24 Φεβρουαρίου 2025, αποφάσισε…
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