5% of the Universe is Normal Matter, What About the Other 95%?

Dark Matters from PHD Comics on Vimeo.

Great discussion and illustration of the state of our understanding of physics, matter, dark matter and the rest of the stuff our universe has from PhD comics. What is the universe made of? 5% of it is normal matter (the stardust we are made of), 20% dark matter and the other 75% – we have no idea!

Dark Cosmos is a nice book on some of these ideas. It is 5 years old so missing some of the latest discoveries.

Related: Why do we Need Dark Energy to Explain the Observable Universe? – The Mystery of Empty Space – Friday Fun, CERN Version
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The Architecture of Access to Scientific Knowledge

The Architecture of Access to Scientific Knowledge from lessig on Vimeo.

Larry Lessig speaks at CERN about the proper use of copyright and the moral case for open access. As I have written many times, I strongly believe our society is better off when science is open. I believe we now are allowing a few greedy institution (that seek to restrict science for the benefit of their organization) to pay our politicians to damage society for the benefit of a few donors.

Related: The Future of Scholarly Publication – Toward a More Open Scientific Culture – Why Copyright Extension is a Very Bad Idea – Patent Gridlock is Blocking Developing Lifesaving Drugs – Bad Government, Closed Access – John Conyers Against Open Science – Science Commons – Public Library of Science

Quixperito – New Social Bookmarking Site

I have created a new social bookmarking site. The site is meant to highlight good content online and is moderated to remove low value and spam content. By developing a community of users that share interests in worthwhile content on a variety of topics I hope to create a useful resource for people.

The topics included now are limited to help focus on high value content and develop a community of users around various topics. Please join and participate. Without a community the value of the site is low. Currently there is a technology section that will be of interest to readers of this Curious Cat Science and Engineering Blog.

Other sections include: science, investing and business.

If you are interested in helping build the community please join and participate. You can post your related articles and posts and find new readers for your content. And by voting on others posts you can help highlight posts that the community finds worth reading.

Related: Curious Cat science and engineering search engine – science and engineering links

Image of Map Showing Concentration of Life in Oceans

Image showing regions of life in the oceans

This image shows the abundance of life in the sea, measured by the SeaWiFS instrument aboard the Seastar satellite. Dark blue represents warmer areas where there is little life due to lack of nutrients, and greens and reds represent cooler nutrient-rich areas.

The nutrient-rich areas include coastal regions where cold water rises from the sea floor bringing nutrients along and areas at the mouths of rivers where the rivers have brought nutrients into the ocean from the land. NASA has posted a large gallery of great images for Earth Day.

Related: Altered Oceans: the Crisis at Sea – Microbes Beneath the Sea Floor – A single Liter of Seawater Can Hold More Than One Billion Microorganisms

Cancer Vaccines

A reader commented on a previous post (MIT Engineers Design New Type of Nanoparticle for Vacines) asking about how vaccines can fight cancer. Preventative vaccines can build up immune response to viruses which cause cancer. So the vaccine actually works against the virus which prevents the virus from causing cancer.

The U.S. Food and Drug Administration (FDA) has approved two vaccines, Gardasil® and Cervarix®, that protect against infection by the two types of human papillomavirus (HPV) – types 16 and 18 – that cause approximately 70% of all cases of cervical cancer worldwide. At least 17 other types of HPV are responsible for the remaining 30% of cervical cancer cases. HPV types 16 and/or 18 also cause some vaginal, vulvar, anal, penile, and oropharyngeal cancers.

Many scientists believe that microbes cause or contribute to between 15% and 25% of all cancers diagnosed worldwide each year, with the percentages being lower in developed than developing countries.

Vaccines can also help stimulate the immune system to fight cancers.

B cells make antibodies, which are large secreted proteins that bind to, inactivate, and help destroy foreign invaders or abnormal cells. Most preventive vaccines, including those aimed at hepatitis B virus (HBV) and human papillomavirus (HPV), stimulate the production of antibodies that bind to specific, targeted microbes and block their ability to cause infection. Cytotoxic T cells, which are also known as killer T cells, kill infected or abnormal cells by releasing toxic chemicals or by prompting the cells to self-destruct (a process known as apoptosis).

Other types of lymphocytes and leukocytes play supporting roles to ensure that B cells and killer T cells do their jobs effectively. These supporting cells include helper T cells and dendritic cells, which help activate killer T cells and enable them to recognize specific threats.

Cancer treatment vaccines are designed to work by activating B cells and killer T cells and directing them to recognize and act against specific types of cancer. They do this by introducing one or more molecules known as antigens into the body, usually by injection. An antigen is a substance that stimulates a specific immune response. An antigen can be a protein or another type of molecule found on the surface of or inside a cell.

Related: National Cancer Institute (USA) – Nanoparticles With Scorpion Venom Slow Cancer Spread – Using Bacteria to Carry Nanoparticles Into Cells – Global Cancer Deaths to Double by 2030
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Help Science Education in Tanzania

Students in Tazania using a microscope

Diana Hall, a physics teacher from Bell High School, Ottawa, Canada is spending 6 months in Tanzania helping build a more active science program. This reminds me of my time in Nigeria (while my father taught Chemical Engineering at the University of Ile Ife to help build a strong university program). It is great to see all the good that people are willing to do.

The objective of the Do Science, Tanzania project is to share teaching strategies and equipment with science teachers and students in Moshi, Tanzania. The goal is to facilitate a more active science program and to inspire students to continue studying beyond the secondary level.

The photo shows students at Reginald Mengi Secondary school, Tanzania, getting their first experience with microscopes in the classroom. There are over 210 Form I (freshman in high school, for you USA readiers) students in 4 classes. The 4 classes had an introduction to the microscope by preparing slides and viewing onion cells.

Working with science teachers is a big part of do Do Science is about. Their blog discusses a recent meeting where 50 science teachers from the Moshi area attended a workshop. The teachers at the workshop modeled thinking exercises, conducted sample labs, investigated computer simulations and interfacing equipment, looked at some DVD resources. and networked.

You can help by donating equipment or money. Or if you are a science teacher with workshop and leadership experience who would consider spending some time in Tanzania as a facilitator?

Related: Learning Design of Experiments with Paper Helicopters – Fund Teacher’s Science Projects – Science Education Resources – Ways to Help Make the World Better

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Engineering Graduates Earned a Return on Their Investment In Education of 21%

A recent report from the New York Fed looks at the economic benefits of college. While there has been a great deal of talk about the “bubble” in higher education the Fed finds college is very wise economically for most people. They do find a larger portion of people that are not getting a great return on their investment in higher education.

That could well indicate students studying certain majors and perhaps some people with less stellar academic skills would be better off economically skipping college.

Do the Benefits of College Still Outweigh the Costs?

an analysis of the economic returns to college since the 1970s demonstrates that the benefits of both a bachelor’s degree and an associate’s degree still tend to outweigh the costs, with both degrees earning a return of about 15 percent over the past decade. The return has remained high in spite of rising tuition and falling earnings because the wages of those without a college degree have also been falling, keeping the college wage premium near an all-time high while reducing the opportunity cost of going to school.

It is hard to beat a 15% return. Of course averages hide variation within the data.

The return to engineer graduates was the greatest of all disciplines examined. Engineering graduates earned a return on their investment of 21%. The next highest were math and computers (18%); health (18%); and business (17%). Even the lowest returns are quite good: education (9%), leisure and hospitality (11%), agriculture (11%) and liberal arts (12%).

These returns look at graduates without post-graduate degrees (in order to find the value of just the undergraduate degree). As those with higher degrees benefit even more but the return on graduate degrees is not part of this study and they didn’t want to confuses the benefits of the post graduate degree with the bachelors degree.

As the article points out those fields with the top returns are more challenging and likely those students are more capable on average so a portion of the return may be due to the higher capabilities of the students (not just to the major they selected). They don’t mention it but engineering also has a higher drop out rate – not all students that would chose to major in engineering are able to do so.

This is one more study showing what we have blog about many times before: science and engineering careers are very economically rewarding. The engineering job market remains strong across many fields; many companies are turning to engineering job placement firms to find specialized staff. While the engineers do voice frustration at various aspects of their jobs the strong market provides significant advantages to an engineering career. As I have said before the reason to chose a career is because that is the work you love, but in choosing between several possible careers it may be sensible to consider the likely economic results.

The study even examines the return for graduates that are continually underemployed (I am not really sure how they get this data, but anyway…) the return for engineers in this situation is still 17% (it is 12% across all majors).

Related: Earnings by College Major, Engineers and Scientists at the Top (2013) – Engineering Graduates Continue to Reign Supreme (2013) – Career Prospect for Engineers Continues to Look Positive (2011)

Engineering Graduates Earned a Return on Their Investment In Education of 21%

A recent report from the New York Fed looks at the economic benefits of college. While there has been a great deal of talk about the “bubble” in higher education the Fed finds college is very wise economically for most people. They do find a larger portion of people that are not getting a great return on their investment in higher education.

That could well indicate students studying certain majors and perhaps some people with less stellar academic skills would be better off economically skipping college.

Do the Benefits of College Still Outweigh the Costs?

an analysis of the economic returns to college since the 1970s demonstrates that the benefits of both a bachelor’s degree and an associate’s degree still tend to outweigh the costs, with both degrees earning a return of about 15 percent over the past decade. The return has remained high in spite of rising tuition and falling earnings because the wages of those without a college degree have also been falling, keeping the college wage premium near an all-time high while reducing the opportunity cost of going to school.

It is hard to beat a 15% return. Of course averages hide variation within the data.

The return to engineer graduates was the greatest of all disciplines examined. Engineering graduates earned a return on their investment of 21%. The next highest were math and computers (18%); health (18%); and business (17%). Even the lowest returns are quite good: education (9%), leisure and hospitality (11%), agriculture (11%) and liberal arts (12%).

These returns look at graduates without post-graduate degrees (in order to find the value of just the undergraduate degree). As those with higher degrees benefit even more but the return on graduate degrees is not part of this study and they didn’t want to confuses the benefits of the post graduate degree with the bachelors degree.

As the article points out those fields with the top returns are more challenging and likely those students are more capable on average so a portion of the return may be due to the higher capabilities of the students (not just to the major they selected). They don’t mention it but engineering also has a higher drop out rate – not all students that would chose to major in engineering are able to do so.

This is one more study showing what we have blog about many times before: science and engineering careers are very economically rewarding. The engineering job market remains strong across many fields; many companies are turning to engineering job placement firms to find specialized staff. While the engineers do voice frustration at various aspects of their jobs the strong market provides significant advantages to an engineering career. As I have said before the reason to chose a career is because that is the work you love, but in choosing between several possible careers it may be sensible to consider the likely economic results.

The study even examines the return for graduates that are continually underemployed (I am not really sure how they get this data, but anyway…) the return for engineers in this situation is still 17% (it is 12% across all majors).

Engineering Graduates Earned a Return on Their Investment In Education of 21%

A recent report from the New York Fed looks at the economic benefits of college. While there has been a great deal of talk about the “bubble” in higher education the Fed finds college is very wise economically for most people. They do find a larger portion of people that are not getting a great return on their investment in higher education.

That could well indicate students studying certain majors and perhaps some people with less stellar academic skills would be better off economically skipping college.

Do the Benefits of College Still Outweigh the Costs?

an analysis of the economic returns to college since the 1970s demonstrates that the benefits of both a bachelor’s degree and an associate’s degree still tend to outweigh the costs, with both degrees earning a return of about 15 percent over the past decade. The return has remained high in spite of rising tuition and falling earnings because the wages of those without a college degree have also been falling, keeping the college wage premium near an all-time high while reducing the opportunity cost of going to school.

It is hard to beat a 15% return. Of course averages hide variation within the data.

The return to engineer graduates was the greatest of all disciplines examined. Engineering graduates earned a return on their investment of 21%. The next highest were math and computers (18%); health (18%); and business (17%). Even the lowest returns are quite good: education (9%), leisure and hospitality (11%), agriculture (11%) and liberal arts (12%).

These returns look at graduates without post-graduate degrees (in order to find the value of just the undergraduate degree). As those with higher degrees benefit even more but the return on graduate degrees is not part of this study and they didn’t want to confuses the benefits of the post graduate degree with the bachelors degree.

As the article points out those fields with the top returns are more challenging and likely those students are more capable on average so a portion of the return may be due to the higher capabilities of the students (not just to the major they selected). They don’t mention it but engineering also has a higher drop out rate – not all students that would chose to major in engineering are able to do so.

This is one more study showing what we have blog about many times before: science and engineering careers are very economically rewarding. The engineering job market remains strong across many fields; many companies are turning to engineering job placement firms to find specialized staff. While the engineers do voice frustration at various aspects of their jobs the strong market provides significant advantages to an engineering career. As I have said before the reason to chose a career is because that is the work you love, but in choosing between several possible careers it may be sensible to consider the likely economic results.

The study even examines the return for graduates that are continually underemployed (I am not really sure how they get this data, but anyway…) the return for engineers in this situation is still 17% (it is 12% across all majors).