H2O Member | Sun Jun 21, 2020 | 11:25 PM | Likes: 3 

A Kivy Installation Problem on Python 3.8

Categories: Tech | Pubby Cash Received:  20

Kivy is a python module that can be used to develop apps on multiple platforms. To install it, go to kivy.org and find the installation instructions on your Windows or Mac system. However, if you are using Python 3.8, kivy might not be successfully installed, as kivy is not supporting this version right now. You will see a full screen of red warning text with a final error message like "ERROR: Command errored out with exit status 1". If this happens, don't worry. Copy and paste the following kivy installation code to the command line and install it again. pip install kivy[base] kivy_examples --pre --extra-index-url https://kivy.org/downloads/simple/ ...  Read more

Evan Tang Elder Moderator | Sun Jun 21, 2020 | 07:42 AM | Likes: 2 

The Simple Safe Video Doorbell Pro

Categories: Tech | Pubby Cash Received:  0

Are you tired of getting out of your seat to find out who just rang the doorbell? Or are your afraid of robbers who might rob your house? Well, the Simple Safe Video Doorbell Pro is the right thing for you. This doorbell is both quality and helpful. First, it is of high quality. After all, it does provide a 162 degrees field of view, 1080p HD, and infrared night vision for the camera itself. Not only that but there are two-way audio, motion alerts, and most importantly, a door chime. Now you can see how quality it is. Also, it is helpful. Even if somebody does not ring the doorbell, it tells you that someone is there. You can talk with guests using the two-way audio. Overall, the Simple Safe Video Doorbell Pro is a very great doorbell and is worth buying. ...  Read more

H2O Member | Sat Jun 20, 2020 | 11:52 PM | Likes: 3 

Data Science - A Promising Discipline in the 21st Century

Categories: Tech | Pubby Cash Received:  10

Data Science is not only a well paid career nowadays, but also evolves into the architecture of lots of other disciplines. As an engineer in traditional civil and environmental engineering disciplines, I recently started to learn data science because my job needs it as well. In many engineering applications, decisions need to made, not by human any more, but by machine. Think about a simple application: should a disinfectant dosing pump be turned on or turned off for water disinfection at a water treatment plant? During this COVID-19 crisis, the management at the plant might say, let's keep the pump running so that there will be enough disinfectant to kill the virus. However, too much disinfectant dosing can also have side effects on human health, which increases the amount of the carcinogenic disinfection byproducts. This is a kind of decision that grows complicated and needs backup based on data analysis. Machine learning is a branch of data science that uses techniques of regression, supervised clustering, etc, to predict the future, or the consequences, in this case, what will happen if the pump is turned on and what will happen if it is turned off. A wise decision is therefore can be made, which can ensure public health and even save people's lives. I could give millions of other examples that depend on all kinds of correct decisions made by machine based on the processing of tons of environmental data. The Tesla autopilot and the recent success of SpaceX rocket launch are one of them. Python - a coding tool, is indispensable for data science learning and applications, and actually falls into the discipline of data science itself and can aid learning. The following image shows the relationship of data science with other closely-related disciplines. You will know your hard-working direction if you want a well paid job and good career!
...  Read more

H2O Member | Fri Jun 19, 2020 | 10:55 PM | Likes: 3 

Jupyter Notebook - A Must-Have Editor for Those Who are Both Programmers and Educators

Categories: Tech | Pubby Cash Received:  10

In this article titled "Sublime Text vs. Pycharm, Which One is Better?", I mentioned Jupyter Notebook as one of well-known Python IDEs. I do see a number of YouTubers use it for demonstration and education purposes, and thought it is cool and practical to use during learning and teaching. However, I think it cannot replace Sublime Text for development of a series of complicated and connected coding files. The reason Jupyter Notebook is superior for education is that it is featured with multiple interactive code blocks that can be easily added or deleted. You can run one single code block or multiple code blocks to see the results instantaneously without executing the whole py file. The shortcuts are just like other editors: ctrl z for undo, ctrl / for comment, and the like, and you can edit those if you want. Of course, Jupyter Notebook also has downsides. I summarized two, and now only have one left. The No. 1 downside I had before was the default white background appearance, as I prefer a dark theme. It is now no longer a downside, as I've figured out how to change to a dark theme manually. The other downside is it runs on a terminal window just like a web application built on flask, and actually uses two of your computer resources simultaneously: a browser window + a terminal window. For some old computers, it will not be running as fast as Sublime Text, because Sublime Text is an editor stands on its own. It does not need you to run in command line unless you want to test the code you've written. However, as an educator and researcher, I would use Jupyter Notebook as well to produce some reproducible code snippets and save as .ipynb files for future references. With that said, here are some instructions for you to install Jupyter Notebook and apply a dark theme as I did. Open a terminal window, enter: pip install notebook pip install jupyterthemes jupyter notebook In a Jupyter Notebook code block, enter !jt -t monokai Note: "monokai" is the name of a dark theme I'm using. Restart Jupyter Notebook in the command line, and the dark theme is ready to go. ...  Read more

Evan Tang Elder Moderator | Fri Jun 19, 2020 | 07:34 AM | Likes: 2 

The Ring Camera

Categories: Tech | Pubby Cash Received:  0

Are you afraid of robbers who may try to steal things from your house? Well, the Ring camera can help prevent those tragic things from happening. The Ring camera is efficient and helpful. First, it is efficient. This camera and be used just by plugging it into a wall socket. You can use your phone to check on it at any time you want. It also gives you notifications when it detects motion. Also, this product is helpful. After all, it does more than just to keeps burglars away. You can use it to connect it with your Alexa and tell in things like what is going on in the backyard. All in all the Ring camera is a very great product and is worth buying. ...  Read more

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