Scientific machine learning paves way for rapid rocket engine design | Space & Time - Science Daily

Summary:
Researchers are developing a faster modeling technique for rocket engine designers to test performance in different conditions.

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"It's not rocket science" may be a tired cliché, but that doesn't mean designing rockets is any less complicated by Science Daily.

Scientific Machine Learning Paves Way for Rapid Rocket Engine Design
Photo:  University of Texas at Austin - UT News

Time, cost and safety prohibit testing the stability of a test rocket using a physical build "trial and error" approach. But even computational simulations are extremely time consuming. A single analysis of an entire SpaceX Merlin rocket engine, for example, could take weeks, even months, for a supercomputer to provide satisfactory predictions.

One group of researchers at The University of Texas at Austin is developing new "scientific machine learning" methods to address this challenge. Scientific machine learning is a relatively new field that blends scientific computing with machine learning. Through a combination of physics modeling and data-driven learning, it becomes possible to create reduced-order models -- simulations that can run in a fraction of the time, making them particularly useful in the design setting.

The goal of the work, led by Karen Willcox at the Oden Institute for Computational Engineering and Sciences, is to provide rocket engine designers with a fast way to assess rocket engine performance in a variety of operating conditions...

How does it work? Deriving reduced-order models from training data is similar in spirit to conventional machine learning. However, there are some key differences. Understanding the physics affecting the stability of a rocket engine is crucial. And these physics must then be embedded into the reduced-order models during the training process.
Read more...

Journal Reference: 
1. Renee Swischuk, Boris Kramer, Cheng Huang, Karen Willcox. Learning Physics-Based Reduced-Order Models for a Single-Injector Combustion Process. AIAA Journal, 2020; 1 DOI: 10.2514/1.J058943

Source: Science Daily

Best of arXiv.org for AI, Machine Learning, and Deep Learning – March 2020 | AI, Machine Learning, and Deep Learning - insideBIGDATA

In this recurring monthly feature, we filter recent research papers appearing on the arXiv.org preprint server for compelling subjects relating to AI, machine learning and deep learning – from disciplines including statistics, mathematics and computer science – and provide you with a useful “best of” list for the past month by Daniel Gutierrez, Author at insideBIGDATA.

Researchers from all over the world contribute to this repository as a prelude to the peer review process for publication in traditional journals. arXiv contains a veritable treasure trove of statistical learning methods you may use one day in the solution of data science problems. We hope to save you some time by picking out articles that represent the most promise for the typical data scientist. The articles listed below represent a fraction of all articles appearing on the preprint server. They are listed in no particular order with a link to each paper along with a brief overview. Especially relevant articles are marked with a “thumbs up” icon. Consider that these are academic research papers, typically geared toward graduate students, post docs, and seasoned professionals. They generally contain a high degree of mathematics so be prepared.
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Enjoy your reading and have a cup of ☕️coffee!    

Source: insideBIGDATA  

Harvard University offers 67 free online courses for those in quarantine | Lifestyle - Jakarta Post

Amid the COVID-19 pandemic, Harvard University, a private Ivy League research university in Cambridge, Massachusetts, is offering 67 free online courses for those who want to expand their knowledge and master new skills during self-quarantine by News Desk - The Jakarta Post. 

Courses range in duration from a week to 15 weeks, with subjects that include programming, health and medicine, social sciences, computer science, art and design, business and humanities.
Photo: shutterstock.com/Gil C/File

Those interested in applying can simply visit the university's website and view the catalogue at online-learning.harvard.edu.

The courses range in duration from a week to 15 weeks, with subjects that include programming, health and medicine, social sciences, computer science, art and design, business and humanities and many more...

Since the outbreak, many institutions and companies have been working toward keeping the public educated and productive through free e-learning initiatives. 
Read more...

Source: Jakarta Post

College offers free online courses during coronavirus outbreak | Rochdale Online

Hopwood Hall College is offering all people aged 19 to 99+ the opportunity to complete a free online course.

Hopwood Hall College have made some free online courses available to anyone
Photo: bnenin - stock.adobe.com

There are courses available from more than 20 subjects areas that are suitable for learners from all different backgrounds during the coronavirus outbreak.

The subjects, which are packed full of bite-sized information, are designed to be completed at home – making it a fantastic way to keep connected while self-isolating and social distancing.

Amongst the diverse range of options include courses in Microsoft Office, Understanding 
Autism, and Managing Remote Teams.

The subjects fall into two groups: personal and professional development...

“They are perfect for learning and developing new skills, as well as a fantastic way to stay productive and push your boundaries.

“At the college, we are committed to bringing out the best in our students – and we’re confident that these online courses can also help the wider community to reach their full potential.”
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Source: Rochdale Online

5 free Harvard online courses you never knew you needed in your life | University - Study International News

Free Harvard online courses: These are our 5 top picks 

Check out these free Harvard online courses from the comfort of your own home.
Photo: Apu Gomes/AFP

Question: How can you study at Harvard without actually jumping through hoops and hurdles or having a rich, celebrity or legacy parent to get admitted to its ivory towers?
Answer: By taking one of the 67 online courses by Harvard currently going free. 

The Ivy League university just announced these online courses, in partnership with EdEX and which range from one week to 12 weeks in duration, are now available on their online course catalogue.

There are great choices for international students to check out during your free time in lockdown or while taking a break from online classes...

Here they are. Settle in and start streaming:
Read more...

Source: Study International News

11 of the best free online courses to take during lockdown | Life - Stylist Magazine

Looking for something to do during lockdown? by Lauren Geall, Junior Digital Writer at Stylist Magazine. 
 

From baking to painting, 11 brilliant free courses you can take online

These incredible online courses offer everything you need to learn a new skill or pick up a new hobby, and they’re 100% free.

Finding activities to keep you occupied during lockdown can be pretty tricky.

All of the usual things that might have kept us entertained pre-coronavirus, such as going for dinner with friends or visiting the cinema, are now out of the picture. And while watching the latest Netflix releases or hosting a virtual pub quiz are fun ways to pass the time, they can get pretty old if they’re the only things at your disposal.

Lucky for us, experts and teachers across the world are using their extra time in lockdown to share their expertise with the internet – for free.
Read more...

Source: Stylist Magazine   

AICTE launches ELIS Portal | Skill Development - Jagran Josh

AICTE Launches Free E-Learning Portal for the candidates sitting at home during the COVID19 quarantine period. Find out all about AICTE ELIS portal and know how it will benefit you in learning new skills, inform Nidhi Gupta, Senior Content Writerat Jagran New Media.

AICTE launches ELIS online courses

All India Council for Technical Education (AICTE) has recently begun an e-learning portal Enhancement in Learning with Improvement In Skills (ELIS) to promote e-learning during the COVID19 lockdown period. Aspirants who are missing out on studies can visit AICTE ELIS portal to register for new programs. This initiative has been started to foster digital learning and support the student community across the country. Several eminent education providers have participated willingly to offer e-courses free of cost for the aspirants to help them cope up with the quarantine period. Find out important information about the ELIS portal, course available, and how to register for it.

Key People behind ELIS portal
The ELIS portal was launched by Prof Anil Sahasrabudhe, Chairman AICTE along with Prof. M.P Poonia, Vice chairman AICTE and Prof Rajive Kumar, Member Secretary, AICTE.

How to Register for New Courses? 
Here is the direct link to register for AICTE’s ELIS portal. Click on the link provided below and enroll for the best courses available in the digital space.
AICTE ELIS Portal 
Register Now
Read more... 

Source: Jagran Josh

Lack of diversity in his field has troubled this mathematician | Pathways to STEM Success - Science News for Students

This Q&A is part of a series exploring the many paths to a career in science, technology, engineering and mathematics (STEM). It has been made possible with generous support from Arconic Foundation.

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As a kid, Edray Goins didn’t like math. But he fell in love with the subject in college and is now training the next generation of minority mathematicians, according to Esther Landhuis, freelance journalist in the San Francisco Bay Area. 

Edray Goins teaches linear algebra at Pomona College — and wants to inspire the next generation of minority mathematicians.
Photo: Courtesy of Myles Ashitey

Reaching the top ranks of mathematicians isn’t easy, even when you’re really smart. But Edray Goins managed just that. He works at the intersection of algebra and number theory. He likes studying so-called Diophantine equations. These have certain patterns of integers. One example: “Pythagorean triples,” such as the 3-4-5 right triangle, where three squared plus four squared equals five squared. And don’t worry if you don’t understand that — many adults don’t, either.

In his career, Goins has worked at some of the top universities for math, such as Caltech, Stanford University and Harvard University. But he noticed something. At every one of them, there were few women and minorities, especially Blacks and Latinos. “It’s always depressed me,” Goins says. “I complained about this over the years, saying this isn’t right. Something needs to change. But I realized I can’t complain unless I’m willing to do something about it.”

So last year, Goins took a job as a professor at Pomona College. It’s in Claremont, Calif., not far from where he grew up. He’s still tackling those complex math problems. But his real goal is to help train the women and minorities in college who will be the next generation of scientists and mathematicians...

What inspired you to pursue your career? 
When I was in elementary school, the space shuttle was launched for the first time. Watching that got me fascinated with science and how the world works.

And so, when I went off to college at Caltech in Pasadena, Calif., I majored in physics. During the first few weeks, I saw a book at the campus bookstore entitled Algebraic Geometry. I knew what algebra was. I knew what geometry was. But I’d never heard of “algebraic geometry.” I purchased the book and tried to read it. I saw a few pictures in there that looked pretty but couldn’t comprehend what I was reading.

I purchased a second book, An Introduction to Number Theory. Again, I had no idea what this was. I started to read. One day my calculus teacher said there’s a guy named Harold Stark coming to Caltech to give a series of lectures. This was the guy who wrote the book I was reading — the book about number theory. So I went to the talk. I understood maybe the first 45 minutes. After that I had no idea what he was talking about. But that book and the guy discussing what was in that book — that’s what convinced me to be a math major.
Read more... 

Recommended Reading

An Introduction to Number Theory - (The MIT Press)

Source: Science News for Students

How to Work From Home Without Feeling Overwhelmed | Communication - ATD

Taylor Tomita, part of the outreach team at NeoMam Studios observes, We’re in the midst of a major shift in the way we work. 

Depressed businessman sitting at computer

The coronavirus (COVID-19) crisis has led companies all over the world to shift their office-based staff to working from home. While many people already know the best way to cope with their homes turning into their offices, it can be overwhelming for anyone not accustomed to the isolation or managing the potential distractions.

There are many other factors that could add up to an overwhelming feeling, like not having access to the right files, the right technology, or even the right people to keep on top of your workload. Quickly, the appeal of working in your pajamas and avoiding a long commute can start to fade, and you’re left only with stress. But there are ways you can deal with these overwhelming feelings.

For instance, you can take a big step toward feeling more calm by tidying up and organizing your workspace, which is particularly important at home. If you already had a home office, it may have turned into a dumping ground through lack of use. Or you might not even have that space set aside and are having to make the best of working in your kitchen. Whatever the situation, clearing your workspace can help ease your stress levels and anxiety...

These tips should help you cope with any overwhelming feelings of stress and anxiety. Which will you try first?  
Read more...

Source: ATD

Finding the Rhythm of Remote Learning | Campus Life - Tufts Now

Four of Tufts’ distance education veterans share best practices for a smooth transition online, summarizes Monica Jimenez, writer at Tufts.

“The big new thing is using online tools synchronously, with real-time interaction in the chat room and breakout rooms," said William Masters, a professor at Friedman School of Nutrition Science and Policy.
Photo: Ingimage

When U.S. universities closed their campuses and switched to online learning, Tufts had a significant head start. 

Tufts’ Friedman School of Nutrition Science and Policy already offers a fully online graduate certificate program, with classes geared toward health professionals, communications professionals, and those interested in healthy communities and sustainable agriculture, led by program director and professor Diane McKay. It also offers a hybrid Master’s in Nutrition Science and Policy (MNSP), led by program director and professor Lynne Ausman, which includes five-day residencies in the fall, spring, and summer, but goes online the rest of the semester...

For teachers:
Don’t try to teach the way you would in person. 
“My number-one piece of advice is don’t try to simulate an in-person class,” Masters said. “A good teacher works the room like any politician — watching people’s faces, recognizing how people are feeling, modulating their voice and presence. But online teaching deprives you of the ability to see students’ reactions and body language in real time — especially if you have a larger class and can’t see them all on the Zoom screen. You’ve got to adapt and do it differently.”...

For students:
Take a deep breath.
Many students learning online now didn’t necessarily expect to be doing so this semester, McKay acknowledged, and it can be a challenging transition to make. She encouraged students to step back and think about what they already know how to do online.
Read more... 

Source: Tufts Now