We study the framework of universal dynamic regret minimization with strongly convex losses. We answer an open problem in Baby and Wang 2021 by showing that in a proper learning setup, Strongly Adaptive algorithms can achieve the near optimal dynamic regret of $\tilde O(d^{1/3} n^{1/3}\text{TV}[u_{1:n}]^{2/3} \vee d)$ against any comparator sequence $u_1,\ldots,u_n$ simultaneously, where $n$ is the time horizon and $\text{TV}[u_{1:n}]$ is the Total Variation of comparator. These results are facilitated by exploiting a number of new structures imposed by the KKT conditions that were not considered in Baby and Wang 2021 which also lead to other improvements over their results such as: (a) handling non-smooth losses and (b) improving the dimension dependence on regret. Further, we also derive near optimal dynamic regret rates for the special case of proper online learning with exp-concave losses and an $L_\infty$ constrained decision set.

We resolve an open problem of Hanneke on the subject of universally consistent online learning with non-i.i.d. processes and unbounded losses. The notion of an optimistically universal learning rule was defined by Hanneke in an effort to study learning theory under minimal assumptions. A given learning rule is said to be optimistically universal if it achieves a low long-run average loss whenever the data generating process makes this goal achievable by some learning rule. Hanneke posed as an open problem whether, for every unbounded loss, the family of processes admitting universal learning are precisely those having a finite number of distinct values almost surely. In this paper, we completely resolve this problem, showing that this is indeed the case. As a consequence, this also offers a dramatically simpler formulation of an optimistically universal learning rule for any unbounded loss: namely, the simple memorization rule already suffices. Our proof relies on constructing random measurable partitions of the instance space and could be of independent interest for solving other open questions. We extend the results to the non-realizable setting thereby providing an optimistically universal Bayes consistent learning rule.

We study the subject of universal online learning with non-i.i.d. processes for bounded losses. The notion of an universally consistent learning was defined by Hanneke in an effort to study learning theory under minimal assumptions, where the objective is to obtain low long-run average loss for any target function. We are interested in characterizing processes for which learning is possible and whether there exist learning rules guaranteed to be universally consistent given the only assumption that such learning is possible. The case of unbounded losses is very restrictive, since the learnable processes almost surely visit a finite number of points and as a result, simple memorization is optimistically universal. We focus on the bounded setting and give a complete characterization of the processes admitting strong and weak universal learning. We further show that k-nearest neighbor algorithm (kNN) is not optimistically universal and present a novel variant of 1NN which is optimistically universal for general input and value spaces in both strong and weak setting. This closes all COLT 2021 open problems posed by Hanneke on universal online learning.

Python is an ideal first programming language for anyone interested in coding. Here are the top 10 Free Online Courses for Python from Udemy we've curated to help you learn Python. In this post you'll find 10 good beginners Python courses you can learn from and start your career as a software developer or web developer. All courses are free and you'll have lifetime access to the material! What better way to learn a new programming language than to dive right in? Python may be a general-purpose programming language, but it has specialized libraries that lend themselves to machine learning, artificial intelligence (AI), and scientific computing.

Predicting contextualised engagement in videos is a long-standing problem that has been popularly attempted by exploiting the number of views or the associated likes using different computational methods. The recent decade has seen a boom in online learning resources, and during the pandemic, there has been an exponential rise of online teaching videos without much quality control. The quality of the content could be improved if the creators could get constructive feedback on their content. Employing an army of domain expert volunteers to provide feedback on the videos might not scale. As a result, there has been a steep rise in developing computational methods to predict a user engagement score that is indicative of some form of possible user engagement, i.e., to what level a user would tend to engage with the content. A drawback in current methods is that they model various features separately, in a cascaded approach, that is prone to error propagation. Besides, most of them do not provide crucial explanations on how the creator could improve their content. In this paper, we have proposed a new unified model, CLUE for the educational domain, which learns from the features extracted from freely available public online teaching videos and provides explainable feedback on the video along with a user engagement score. Given the complexity of the task, our unified framework employs different pre-trained models working together as an ensemble of classifiers. Our model exploits various multi-modal features to model the complexity of language, context agnostic information, textual emotion of the delivered content, animation, speaker's pitch and speech emotions. Under a transfer learning setup, the overall model, in the unified space, is fine-tuned for downstream applications.

As remote and hybrid work becomes commonplace, companies are investigating ways to train salespeople one-on-one virtually -- typically over video chat platforms like Zoom. Even before the pandemic, 59% of learning and development professionals were spending more of their budget on online training than in-person, according to LinkedIn. But not every department is devoting an equal amount of time to coaching, surveys show -- and this can be to the detriment of sales. A recent RingDNA report found that 45% of salespeople have received less coaching than usual or no coaching since moving to remote work during the pandemic. It's estimated that 75% of sales organizations waste resources due to random and informal coaching, besides, the opportunity costs being substantial.

This is Supervised machine learning full course. It covers all basic concepts from Python, Pandas, Django, Ajax and Scikit Learn. The course start on Jupyter notebook where different operations will performed on data. The end goal of this course is to teach how to deploy machine learning model on Django Python web framework. Actually, that is the purpose of machine learning.

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DBT data build tool helps data teams work like software engineers, transform data and control the flow to ship trusted data, faster. It means that we first load the data as is to the target and then use SQL (DBT data build tool) to transform it. DBT data build tool will materialize your SQL selects into table views and manage the flow of executing the SQL. ETL developers, DBA, BI developers, decision-makers that consider DBT, SQL programmers, data analysts, data engineers.

I've been a teacher at many grade levels, and I own a tutoring center that serves kids from age 4 to 18. I've tutored hundreds of students myself over 10 years. I've spent a lot of time trying to teach concepts, to students, peers, friends, direct reports, you name it. I say this because there is one thing that I beg you to listen to, and it's the number one issue I've seen in students at all levels: We just don't know what we don't know. People aren't great at seeing where their own understanding has small gaps. For any topic, we have a few lines of knowledge that we can spout, but we just aren't aware of the edge cases that exist until we see them. We don't have all the knowledge of how every topic intersects with every related one, and many times, those answers are not easy to figure out. Therein lies why experience is valuable. There is so much about even the basic Data Science topics that we haven't yet come across.