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When remote instruction started at my school last spring, I met with my students every morning at 10 to alternate math and reading lessons virtually. At first, my kindergartners thought it was fun, different, and exciting to have class through Zoom. But it wasn’t long before online learning stopped being quite so fun and exciting. For some of the kids, it was clearly becoming monotonous.

There were lots of challenges for me in teaching virtually. The biggest was keeping the kids engaged. My teammates and I shared ideas, and I had varying amounts of success. The following are all strategies I used this past spring.

Equity Sticks

When we began meeting virtually, my students were excited. Everyone wanted to participate, raising their hands enthusiastically. A couple of weeks in, that changed. Some kids were still participating wholly, but others were not.

In my classroom, I use equity sticks. I could pull out a stick to randomly choose the name of a student to call on. It occurred to me that I could use these sticks in Zoom, too. I purchased sticks from Amazon and created a stick for each student in about 10 minutes.

Pros

I could get kids who weren’t raising their hands involved; they responded beautifully.

It helped me try to make sure that every student got a chance to speak during every lesson.

It was easy to incorporate into my lessons.

Cons

Some lessons simply didn’t have enough discussion points to pull each student’s stick.

Personalized or Themed Lessons

As a team, we decided to present our lessons using Google Slides. Early on, we personalized these by using student names wherever we could (e.g., in a math story problem). Halfway through our time of virtual teaching, we began adding themes to our presentations (e.g., superheroes or summer food).

Pros

The kids loved seeing their names in the presentations.

The themes kept the majority of the kids interested.

Cons

Personalizing and incorporating themes was quite time-consuming.

Mindfulness Brain Breaks

No matter what we did to liven up our presentations, which usually lasted about 20 minutes, some of the kids still got squirmy. From almost the beginning, we included some mindful breathing GIFs and video brain breaks. Typically, these videos ran three to five minutes and encouraged the students to move.

Pros

Most of the kids bought in to the breathing, which we dropped in right before the real meat of the lesson.

Most of the kids loved the videos we chose as our brain breaks (and I don’t have words to describe how cute they were, moving and grooving to the music).

Cons

Finding appropriate breathing moments and break videos was time-consuming.

Finding new moments and videos to use was challenging as time went on.

Some students were not engaging in these breaks, so that was time they were just staring at the screen. Some of these students tended to be shy about moving on camera, and the others weren’t interested in the activity.

Zoom Tools

At the start, we had the kids raise their hands or use their thumbs to respond to questions. As we became more comfortable with Zoom, we were able to use some of the tools that the program has to offer—in particular, the “raise hand” and “chat” tools.

In addition to using the raise hand tool when they knew an answer, I had them use the chat box. They could type T or F for true/false questions, or they could type the answer to a math problem—I made sure they were typing only to me, not to each other.

Pros

The tools were easy to teach, and the kids caught on very quickly.

The kids loved using the tools, particularly the chat feature.

The tools provided lots of practice using the computer keyboard.

Cons

I learned that the tools needed to be used sparingly, as the students’ interest in using them lessened over time.

Sometimes they just wanted to type random things to me in the box, ignoring whatever lesson I was giving.

Emailed To-Do Lists

It was vital for parents to be a part of the virtual learning experience. Their children needed the help, and I needed a partner in getting the kids to do their assigned work. Early on, I sent the parents a blank weekly checklist they could print out and fill in. I also emailed parents and the kids daily. I shared a list of my expectations for the next day, along with links to assignments and our Zoom classes.

Pros

The parents loved the checklist as an organizational tool.

The daily emails allowed the parents to keep track of what I expected and offered a quick and easy way to reply to me to ask questions.

Cons

This task could be time-consuming.

It was difficult to tell who was actually reading the emails.

It was recently announced that we will begin our upcoming school year online. I plan to use all of these strategies with minor adjustments. I have learned that I need to use the Zoom tools and video breaks sparingly. I know I’ll need to allow time for finding useful GIFs and videos.

These strategies were invaluable and helped keep my students engaged. I plan to brainstorm new strategies with my team this fall. If we all keep sharing our discoveries, we can keep these kids engaged in learning no matter where the learning takes place.

You're reading __Keeping Kindergartners Engaged In Distance Learning__

## Understanding Distance Metrics Used In Machine Learning

Clustering is an important part of data cleaning, used in the field of artificial intelligence, deep learning, and data science. Today we are going to discuss distance metrics, which is the backbone of clustering. Distance metrics basically deal with finding the proximity or distance between data points and determining if they can be clustered together. In this article, we will walk through 4 types of distance metrics in machine learning and understand how they work in Python.

Learning objectives

In this tutorial, you will learn about the use cases of various distance metrics.

You will also learn about the different types of learning metrics.

Lastly, you will learn about the important role distance metrics play in data mining.

What Are Distance Metrics?Distance metrics are a key part of several machine learning algorithms. These distance metrics are used in both supervised and unsupervised learning, generally to calculate the similarity between data points. An effective distance metric improves the performance of our machine learning model, whether that’s for classification tasks or clustering.

Let’s say you need to create clusters using a clustering algorithm such as K-Means Clustering or k-nearest neighbor algorithm (knn), which uses nearest neighbors to solve a classification or regression problem. How will you define the similarity between different observations? How can we say that two points are similar to each other? This will happen if their features are similar, right? When we plot these points, they will be closer to each other by distance.

Hence, we can calculate the distance between points and then define the similarity between them. Here’s the million-dollar question – how do we calculate this distance, and what are the different distance metrics in machine learning? Also, are these metrics different for different learning problems? Do we use any special theorem for this? These are all questions we are going to answer in this article.

Types of Distance Metrics in Machine Learning

Euclidean Distance

Manhattan Distance

Minkowski Distance

Hamming Distance

Let’s start with the most commonly used distance metric – Euclidean Distance.

Euclidean DistanceEuclidean Distance represents the shortest distance between two chúng tôi is the square root of the sum of squares of differences between corresponding elements.

The Euclidean distance metric corresponds to the L2-norm of a difference between vectors and vector spaces. The cosine similarity is proportional to the dot product of two vectors and inversely proportional to the product of their magnitudes.

Most machine learning algorithms, including K-Means use this distance metric to measure the similarity between observations. Let’s say we have two points, as shown below:

So, the Euclidean Distance between these two points, A and B, will be:

Formula for Euclidean DistanceWe use this formula when we are dealing with 2 dimensions. We can generalize this for an n-dimensional space as:

Where,

n = number of dimensions

pi, qi = data points

Let’s code Euclidean Distance in Python. This will give you a better understanding of how this distance metric works.

We will first import the required libraries. I will be using the SciPy library that contains pre-written codes for most of the distance functions used in Python:

View the code on Gist.

These are the two sample points that we will be using to calculate the different distance functions. Let’s now calculate the Euclidean Distance between these two points:

Python Code

This is how we can calculate the Euclidean Distance between two points in Python. Let’s now understand the second distance metric, Manhattan Distance.

Manhattan DistanceManhattan Distance is the sum of absolute differences between points across all the dimensions.

We can represent Manhattan Distance as:

Formula for Manhattan DistanceSince the above representation is 2 dimensional, to calculate Manhattan Distance, we will take the sum of absolute distances in both the x and y directions. So, the Manhattan distance in a 2-dimensional space is given as:

And the generalized formula for an n-dimensional space is given as:

Where,

n = number of dimensions

pi, qi = data points

Now, we will calculate the Manhattan Distance between the two points:

View the code on Gist.

Note that Manhattan Distance is also known as city block distance. SciPy has a function called cityblock that returns the Manhattan Distance between two points.

Let’s now look at the next distance metric – Minkowski Distance.

Minkowski DistanceMinkowski Distance is the generalized form of Euclidean and Manhattan Distance.

Formula for Minkowski DistanceHere, p represents the order of the norm. Let’s calculate the Minkowski Distance formula of order 3:

View the code on Gist.

The p parameter of the Minkowski Distance metric of SciPy represents the order of the norm. When the order(p) is 1, it will represent Manhattan Distance and when the order in the above formula is 2, it will represent Euclidean Distance.

Python CodeView the code on Gist.

Here, you can see that when the order is 1, both Minkowski and Manhattan Distance are the same. Let’s verify the Euclidean Distance as well:

View the code on Gist.

When the order is 2, we can see that Minkowski and Euclidean distances are the same.

So far, we have covered the distance metrics that are used when we are dealing with continuous or numerical variables. But what if we have categorical variables? How can we decide the similarity between categorical variables? This is where we can make use of another distance metric called Hamming Distance.

Hamming DistanceHamming Distance measures the similarity between two strings of the same length. The Hamming Distance between two strings of the same length is the number of positions at which the corresponding characters are different.

Let’s understand the concept using an example. Let’s say we have two strings:

“euclidean” and “manhattan”

Since the length of these strings is equal, we can calculate the Hamming Distance. We will go character by character and match the strings. The first character of both the strings (e and m, respectively) is different. Similarly, the second character of both the strings (u and a) is different. and so on.

Look carefully – seven characters are different, whereas two characters (the last two characters) are similar:

Hence, the Hamming Distance here will be 7. Note that the larger the Hamming Distance between two strings, the more dissimilar those strings will be (and vice versa).

Python CodeLet’s see how we can compute the Hamming Distance of two strings in Python. First, we’ll define two strings that we will be using:

View the code on Gist.

These are the two strings “euclidean” and “manhattan”, which we have seen in the example as well. Let’s now calculate the Hamming distance between these two strings:

View the code on Gist.

As we saw in the example above, the Hamming Distance between “euclidean” and “manhattan” is 7. We also saw that Hamming Distance only works when we have strings of the same length.

Let’s see what happens when we have strings of different lengths:

View the code on Gist.

You can see that the lengths of both the strings are different. Let’s see what will happen when we try to calculate the Hamming Distance between these two strings:

View the code on Gist.

This throws an error saying that the lengths of the arrays must be the same. Hence, Hamming distance only works when we have strings or arrays of the same length.

These are some of the most commonly used similarity measures or distance matrices in Machine Learning.

ConclusionDistance metrics are a key part of several machine learning algorithms. They are used in both supervised and unsupervised learning, generally to calculate the similarity between data points. Therefore, understanding distance measures is more important than you might realize. Take k-NN, for example – a technique often used for supervised learning. By default, it often uses euclidean distance, a great distance measure, for clustering.

By grasping the concept of distance metrics and their mathematical properties, data scientists can make informed decisions in selecting the appropriate metric for their specific problem. Our BlackBelt program provides comprehensive training in machine learning concepts, including distance metrics, empowering learners to become proficient in this crucial aspect of data science. Enroll in our BlackBelt program today to enhance your skills and take your data science expertise to the next level.

Key Takeaways

Distance metrics are used in supervised and unsupervised learning to calculate similarity in data points.

They improve the performance, whether that’s for classification tasks or clustering.

The four types of distance metrics are Euclidean Distance, Manhattan Distance, Minkowski Distance, and Hamming Distance.

Frequently Asked QuestionsQ1. What is the L1 L2 distance metric?

A. The L1 is calculated as the sum of the absolute values of the vector. The L2 norm is calculated as the square root of the sum of squared vector values.

Q2. What distance metrics are used in KNN?

A. Euclidean distance, cosine similarity measure, Minkowsky, correlation, and Chi-square, are used in the k-NN classifier.

Q3. What is a distance metric in clustering?

A. Distance metric is what most algorithms, such as K-Means and KNN, use for clustering.

Related

## Fraud Detection In Machine Learning

Fraud Detection with Machine Learning is possible because of the ability of the models to learn from past fraud data to recognize patterns and predict the legitimacy of future transactions. In most cases, it’s more effective than humans due to the speed and efficiency of information processing. Some types of internet frauds are: 1. ID forgery. Nowadays IDs are fabricated so well that it’s almost impossible for humans to verify their legitimacy and prevent any identity fraud. Through the use of AI, various features of the ID card appearance can be analysed to give a result on the authenticity of the document. This allows companies to establish their own criteria for security when requests are made which require certain ID documents. 2. Bank loan scams. These may happen if a person contacts you and offers a loan scheme with suspiciously favourable conditions. Here the person contacting you will ask for your bank details or for payment upfront, without having any proper company information or even using an international contact number. Such frauds can easily be handled by AI using previous loan application records to filter out loan defaulters. 4. Credit card frauds. This is the most common type of payment fraud. This is because all details are stored online which makes it easier for criminals and hackers to access. Cards sent through mail can also be easily intercepted. One way to filter such fraud transactions using machine learning is discussed below. 5. Identity theft. Machine Learning for detecting identity theft helps checking valuable identity documents such as passports, PAN cards, or driver’s licenses in real-time. Moreover, biometric information can be sometimes required to improve security even more. These security methods need in-person authentication which decreases the chance of frauds to a great extent.

Model to predict fraud using credit card data:Here a very famous Kaggle dataset is used to demonstrate how fraud detection works using a simple neural network model. Imports:

import pandas as pd import numpy as np import tensorflow as tf import keras from sklearn.preprocessing import StandardScaler from keras.models import Sequential from keras.layers import Dense from sklearn.model_selection import train_test_split from sklearn.metrics import classification_report

Have a look at the dataset

data= pd.read_csv(‘creditcard.csv’) data[‘Amount_norm’] = StandardScaler().fit_transform(data[‘Amount’].values.reshape(-1,1)) data= data.drop([‘Amount’],axis=1) data= data.drop([‘Time’],axis=1) data= data[:-1] data.info()

Now after some data cleaning, our dataset contains a total of 28 features and one target, all having float values which are not empty. Our target is the Class column which determines whether the particular credit card transaction is fraud or not. So the dataset is divided accordingly into train and test, keeping the usual 80:20 split ratio. (random_state is fixed to help you reproduce your split data)

X = data.iloc[:, data.columns != ‘Class’] y = data.iloc[:, data.columns == ‘Class’]

X_train, X_test, y_train, y_test = train_test_split(X,y, test_size = 0.2, random_state=0)

We use the sequential model from keras library to build a neural network with 3 dense layers. The output layer contains only a single neuron which will use the sigmoid function to result in either a positive class or a negative class. The model is then compiled with adam optimizer, though it is highly suggested that you try out different values of hyper parameters by yourself, such as the number of units in each layer, activation, optimizer, etc. to see what works best for a given dataset.

model= Sequential() model.add(Dense(units= 16 , activation = ‘relu’, input_dim = 29)) model.add(Dense(units= 16, activation = ‘relu’)) model.add(Dense(units= 1, activation = ‘sigmoid’))

model.fit(X_train, y_train, batch_size = 32, epochs = 15)

This is the result after running the model for a few epochs. We see that the model gives 99.97% accuracy very fast. Below, y_pred contains the predictions made by our model on the test data, and a neat summary of its performance is shown.

y_pred = model.predict(X_test) print(classification_report(y_test, y_pred))

ConclusionSo this way we were successfully able to build a highly accurate model to determine fraudulent transactions. These come in very handy for risk management purposes.

Author Bio:## Maximum Likelihood In Machine Learning

Introduction

In this article, we will discuss the likelihood function, the core idea behind that, and how it works with code examples. This will help one to understand the concept better and apply the same when needed.

Let us dive into the likelihood first to understand the maximum likelihood estimation.

What is the Likelihood?In machine learning, the likelihood is a measure of the data observations up to which it can tell us the results or the target variables value for particular data points. In simple words, as the name suggests, the likelihood is a function that tells us how likely the specific data point suits the existing data distribution.

For example. Suppose there are two data points in the dataset. The likelihood of the first data point is greater than the second. In that case, it is assumed that the first data point provides accurate information to the final model, hence being likable for the model being informative and precise.

After this discussion, a gentle question may appear in your mind, If the working of the likelihood function is the same as the probability function, then what is the difference?

Difference Between Probability and LikelihoodAlthough the working and intuition of both probability and likelihood appear to be the same, there is a slight difference, here the possibility is a function that defines or tells us how accurate the particular data point is valuable and contributes to the final algorithm in data distribution and how likely is to the machine learning algorithm.

Whereas probability, in simple words is a term that describes the chance of some event or thing happening concerning other circumstances or conditions, mostly known as conditional probability.

Also, the sum of all the probabilities associated with a particular problem is one and can not exceed it, whereas the likelihood can be greater than one.

What is Maximum Likelihood Estimation?After discussing the intuition of the likelihood function, it is clear to us that a higher likelihood is desired for every model to get an accurate model and has accurate results. So here, the term maximum likelihood represents that we are maximizing the likelihood function, called the Maximization of the Likelihood Function.

Let us try to understand the same with an example.

Let us suppose that we have a classification dataset in which the independent column is the marks of the students that they achieved in the particular exam, and the target or dependent column is categorical, which has yes and No attributes representing if students are placed on the campus placements or not.

Noe here, if we try to solve the same problem with the help of maximum likelihood estimation, the function will first calculate the probability of every data point according to every suitable condition for the target variable. In the next step, the function will plot all the data points in the two-dimensional plots and try to find the line that best fits the dataset to divide it into two parts. Here the best-fit line will be achieved after some epochs, and once achieved, the line is used to classify the data point by simply plotting it to the graph.

Maximum Likelihood: The BaseThe maximum likelihood estimation is a base of some machine learning and deep learning approaches used for classification problems. One example is logistic regression, where the algorithm is used to classify the data point using the best-fit line on the graph. The same approach is known as the perceptron trick regarding deep learning algorithms.

As shown in the above image, all the data observations are plotted in a two-dimensional diagram where the X-axis represents the independent column or the training data, and the y-axis represents the target variable. The line is drawn to separate both data observations, positives and negatives. According to the algorithm, the observations that fall above the line are considered positive, and data points below the line are regarded as negative data points.

Maximum Likelihood Estimation: Code ExampleWe can quickly implement the maximum likelihood estimation technique using logistic regression on any classification dataset. Let us try to implement the same.

import

pandasas

pdimport

numpyas

npimport

seabornas

snsfrom

sklearn.

linear_modelimport

LogisticRegression lr=

LogisticRegression(

)

lr.

fit(

X_train,

y_train)

lr_pred=

lr.

predict(

X_test)

sns.

regplot(

x=

"X"

,

y=

'lr_pred'

,

data=

df_pred,

logistic=

True

,

ci=

None

)

The above code will fit the logistic regression for the given dataset and generate the line plot for the data representing the distribution of the data and the best fit according to the algorithm.

Key Takeaways

Maximum Likelihood is a function that describes the data points and their likeliness to the model for best fitting.

Maximum likelihood is different from the probabilistic methods, where probabilistic methods work on the principle of calculation probabilities. In contrast, the likelihood method tries o maximize the likelihood of data observations according to the data distribution.

Maximum likelihood is an approach used for solving the problems like density distribution and is a base for some algorithms like logistic regression.

The approach is very similar and is predominantly known as the perceptron trick in terms of deep learning methods.

ConclusionIn this article, we discussed the likelihood function, maximum likelihood estimation, its core intuition, and working mechanism with practical examples associated with some key takeaways. This will help one understand the maximum likelihood better and more deeply and help answer interview questions related to the same very efficiently.

## Nintendo Wii U’S Biggest Challenge: Keeping Us Interested

Nintendo Wii U’s Biggest Challenge: Keeping Us Interested

When the Wii U launches later this year, I’ll be one of many people getting into line to get my hands on the latest console. Although I’m not so sure I’ll enjoy it over a long period and I still believe that the Wii U is coming out too soon and with lesser components than it should, I’m a gaming fanatic. And as a gaming fanatic, I can’t help but get my hands on the latest console.

I did the same with the Wii. I stood in line to finally get my chance at buying the console that so many people were after, and for some time, I was impressed by its technology. After awhile, however, I found that the motion gaming was a gimmick that I couldn’t stand for a long period of time. And with a sub-par game library at the time, I was bored within a couple of months.

Now, as I consider my next console purchase, I can’t help but think back at that time. The Wii seemed so appealing at launch, but it wasn’t long before it started collecting dust in a closet in my house. The Wii U seems to stink of the same scent, and I’m concerned that it might arrive at the same fate as its predecessor.

Although I’ll fully admit that many people out there are huge Wii fans and still enjoy playing the console ach day, I think there are a larger number of people that fell into a similar situation as me. The Wii was their favorite console for a while, but before long, it was ignored.

So, Nintendo has to do everything it can to make sure its latest console doesn’t end up the same way. And the only way to do that is to keep us interested.

[aquote]Keeping us interested isn’t as easy as it once was[/aquote]

Keeping us interested isn’t as easy as it once was. Today’s gamer expects to not only have high-quality graphics and a deep library of titles, but also a host of entertainment options, robust online gaming, and a nice selection of digitally delivered legacy games. We’re more sophisticated now. And Microsoft, which was really the first company to acknowledge that, is successful today because of it.

However, Nintendo has proven to be the last in the gaming space to realize the changing landscape. The company wants us to believe that the old days are still here. They’re not. And that kind of mentality will kill the Wii U.

I think we’re all fully aware of the challenges the Wii U faces. From Nintendo’s spotty relationships with third-party publishers to the threat of the Xbox 720 and PlayStation 4 launching either next year or in 2014, the Wii U is facing a host of challenges. But keeping us interested over an extended period of time might just be its greatest threat.

Now more than ever, we have entertainment options available to us that will take up time and make the Wii U’s fight for our attention all the more difficult.

Given what we know now – namely that the Wii U is an iterative update over its predecessor and not a major step up – should we expect the Wii U to keep us interested over the long-term?

We can certainly hope. But I’m doubtful, to say the least.

## Ai Vs. Machine Learning Vs. Deep Learning

Since before the dawn of the computer age, scientists have been captivated by the idea of creating machines that could behave like humans. But only in the last decade has technology enabled some forms of artificial intelligence (AI) to become a reality.

Interest in putting AI to work has skyrocketed, with burgeoning array of AI use cases. Many surveys have found upwards of 90 percent of enterprises are either already using AI in their operations today or plan to in the near future.

Eager to capitalize on this trend, software vendors – both established AI companies and AI startups – have rushed to bring AI capabilities to market. Among vendors selling big data analytics and data science tools, two types of artificial intelligence have become particularly popular: machine learning and deep learning.

While many solutions carry the “AI,” “machine learning,” and/or “deep learning” labels, confusion about what these terms really mean persists in the market place. The diagram below provides a visual representation of the relationships among these different technologies:

As the graphic makes clear, machine learning is a subset of artificial intelligence. In other words, all machine learning is AI, but not all AI is machine learning.

Similarly, deep learning is a subset of machine learning. And again, all deep learning is machine learning, but not all machine learning is deep learning.

Also see: Top Machine Learning Companies

AI, machine learning and deep learning are each interrelated, with deep learning nested within ML, which in turn is part of the larger discipline of AI.

Computers excel at mathematics and logical reasoning, but they struggle to master other tasks that humans can perform quite naturally.

For example, human babies learn to recognize and name objects when they are only a few months old, but until recently, machines have found it very difficult to identify items in pictures. While any toddler can easily tell a cat from a dog from a goat, computers find that task much more difficult. In fact, captcha services sometimes use exactly that type of question to make sure that a particular user is a human and not a bot.

In the 1950s, scientists began discussing ways to give machines the ability to “think” like humans. The phrase “artificial intelligence” entered the lexicon in 1956, when John McCarthy organized a conference on the topic. Those who attended called for more study of “the conjecture that every aspect of learning or any other feature of intelligence can in principle be so precisely described that a machine can be made to simulate it.”

Critics rightly point out that there is a big difference between an AI system that can tell the difference between cats and dogs and a computer that is truly intelligent in the same way as a human being. Most researchers believe that we are years or even decades away from creating an artificial general intelligence (also called strong AI) that seems to be conscious in the same way that humans beings are — if it will ever be possible to create such a system at all.

If artificial general intelligence does one day become a reality, it seems certain that machine learning will play a major role in the system’s capabilities.

Machine learning is the particular branch of AI concerned with teaching computers to “improve themselves,” as the attendees at that first artificial intelligence conference put it. Another 1950s computer scientist named Arthur Samuel defined machine learning as “the ability to learn without being explicitly programmed.”

In traditional computer programming, a developer tells a computer exactly what to do. Given a set of inputs, the system will return a set of outputs — just as its human programmers told it to.

Machine learning is different because no one tells the machine exactly what to do. Instead, they feed the machine data and allow it to learn on its own.

In general, machine learning takes three different forms:

Reinforcement learning is one of the oldest types of machine learning, and it is very useful in teaching a computer how to play a game.

For example, Arthur Samuel created one of the first programs that used reinforcement learning. It played checkers against human opponents and learned from its successes and mistakes. Over time, the software became much better at playing checkers.

Reinforcement learning is also useful for applications like autonomous vehicles, where the system can receive feedback about whether it has performed well or poorly and use that data to improve over time.

Supervised learning is particularly useful in classification applications such as teaching a system to tell the difference between pictures of dogs and pictures of cats.

In this case, you would feed the application a whole lot of images that had been previously tagged as either dogs or cats. From that training data, the computer would draw its own conclusions about what distinguishes the two types of animals, and it would be able to apply what it learned to new pictures.

By contrast, unsupervised learning does not rely on human beings to label training data for the system. Instead, the computer uses clustering algorithms or other mathematical techniques to find similarities among groups of data.

Unsupervised machine learning is particularly useful for the type of big data analytics that interests many enterprise leaders. For example, you could use unsupervised learning to spot similarities among groups of customers and better target your marketing or tailor your pricing.

Some recommendation engines rely on unsupervised learning to tell people who like one movie or book what other movies or books they might enjoy. Unsupervised learning can also help identify characteristics that might indicate a person’s credit worthiness or likelihood of filing an insurance claim.

Various AI applications, such as computer vision, natural language processing, facial recognition, text-to-speech, speech-to-text, knowledge engines, emotion recognition, and other types of systems, often make use of machine learning capabilities. Some combine two or more of the main types of machine learning, and in some cases, are said to be “semi-supervised” because they incorporate some of the techniques of supervised learning and some of the techniques of unsupervised learning. And some machine learning techniques — such as deep learning — can be supervised, unsupervised, or both.

The phrase “deep learning” first came into use in the 1980s, making it a much newer idea than either machine learning or artificial intelligence.

Deep learning describes a particular type of architecture that both supervised and unsupervised machine learning systems sometimes use. Specifically, it is a layered architecture where one layer takes an input and generates an output. It then passes that output on to the next layer in the architecture, which uses it to create another output. That output can then become the input for the next layer in the system, and so on. The architecture is said to be “deep” because it has many layers.

To create these layered systems, many researchers have designed computing systems modeled after the human brain. In broad terms, they call these deep learning systems artificial neural networks (ANNs). ANNs come in several different varieties, including deep neural networks, convolutional neural networks, recurrent neural networks and others. These neural networks use nodes that are similar to the neurons in a human brain.

However, those GPUs also excel at the type of calculations necessary for deep learning. As GPU performance has improved and costs have decreased, people have been able to create high-performance systems that can complete deep learning tasks in much less time and for much less cost than would have been the case in the past.

Today, anyone can easily access deep learning capabilities through cloud services like Amazon Web Services, Microsoft Azure, Google Cloud and IBM Cloud.

If you are interested in learning more about AI vs machine learning vs deep learning, Datamation has several resources that can help, including the following:

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