Tag Archives: Science

Innovative Recycling is the Future

Do you have an overflowing cupboard at home full of flimsy plastic shopping bags which you’ll never use? There has been a push for using reusable canvas shopping bags, which are environmentally friendly and cut store costs but sometimes using the plastic disposable ones are the only option.  There have been  numerous news stories outlining how detrimental these plastic bags can be in the environment. A recent study shows that there may be a use for those hundreds of plastic bags, which would keep them out of the natural environment and out of your cupboard! [youtube]https://www.youtube.com/watch?v=en4XzfR0FE8[/youtube]

Diesel Pump via Google Images

This study shows how it’s possible to convert plastic shopping bags into diesel fuel. The study collected plastic shopping bags from local retailers and, through chemical processes, produced diesel fuel as well as what they believe are other oil based lubricants. The end diesel product is nearly identical to natural diesel fuels and has a substantially higher potential energy output then the energy consumed in its production. 

In an interview with Science Daily, Dr. Brajendra Sharma stated, “You can get only 50 to 55 percent fuel from the distillation of petroleum crude oil… But since this plastic is made from petroleum in the first place, we can recover almost 80 percent fuel from it through distillation.” The researchers were able to blend up to 30 percent of their plastic-derived diesel into regular diesel and “found no compatibility problems with biodiesel,” Sharma said.

It was discovered that only 13% of the approximately one trillion shopping bags used in 2009 were recycled, showing that we need to continue to push our communities to recycle. Discoveries and innovations in the fields of recycling and renewable energy, like the study discussed, are extremely exciting when we think about the future of our planet. In order for our modern society to survive at the same level of comfort we currently enjoy, we must continue to think of innovative ways to recycle and reduce our garbage.

Written by Andrew Hefford

 

You Who Came From The Stars

You may know that your body is made of 65% oxygen, 19% hydrogen, and other heavier elements. But do you know where did all these elements come from and how they were generated?

An artist drawing of Big Bang. (via Google)

We know that the current theory states that the universe began with the Big Bang, an event that initially started at an extremely hot and dense point and that point expanded over nearly 14 billion to form the current universe. Right after the Big Bang, the universe contained only free floating subatomic particles such as protons, neutrons, and electrons. When the universe continued to expand, its temperature cooled off. Once the temperature was cool enough for the protons to catch the running electrons in this colder than before, yet still boiling universe, the first hydrogen atom formed. Similarly, helium and lithium were generated by the collision of protons and neutron. By that time the universe was made of mostly hydrogen, helium and trace amount of lithium.

After another long period of time, the region of the universe that was slightly higher in density started to attract any mass to form gas cloud by the force of gravity. As this cloud of mass got denser, it attracted even more mass. Eventually, the core became dense and hot enough for hydrogen atoms fusing together to form helium atoms and generating enormous amount of energy. Nowadays, we call this cloud of gas a star. As a star grows, more fusion reaction happened and more helium were generated. When there was enough helium accumulated in the core, all these helium started to fuse together and form carbon. After that, when there was enough carbon, oxygen started to form. This process continued until iron was formed.

An Image of Our Sun ( via Wikipedia)

An image of our Sun ( via Wikipedia)

Unfortunately, the stars can’t generate any heavier element than iron. This is because the nature of iron fusion does not produce energy  but consume energy. Hence, when a star started to fuse iron, its core lost the pressure-gradient force against its gravity and the core collapsed. The result was a supernova: a stellar explosion.

An Image of Our Sun ( via Wikipedia)

Kepler’s Supernova ( via Wikipedia)

That was the moment the rest of the period table elements were filled!

During supernova, atoms were exposed in more extreme temperature and pressure, allowing the formation of elements beyond iron in just a few second. Then, the star exploded into a cloud of gas: nebula.

 

Eagle Nebula (via Wikipedia)

This newly formed nebula can now give the raise of another star or stars and the debris that rotate around the newly formed star would become a planet and elements that you find on a planet, including yourself.

Now you can tell your friends that your body was once the core of stars.

By William Yang

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A Need For More Carefully Regulated Marine Protected Areas

If you pay attention to recent news and environmentalists, you’ve probably heard that there is an ever increasing push to have a larger number of conservation areas for wildlife protection. This is extremely important in a world where populations are exploding and humans are constantly transforming rural areas into urbanized zones.  Globally there are 13 million hectares of deforestation occurring every year, with rare countries showing as much as a 28% increase of clear cutting. Although land protection is very important, it seems like less press time is given to the protection of marine habitats.

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In the last few year there has been a push for marine protected areas; however,  a disturbing, 6 year study from Australia published in nature, shows that these marine protected areas or MPAs are not having as positive an effect as we might have hoped. With the total fish biomass having declined by two thirds in fished areas it’s extremely worrisome that fifty nine percent of the marine protected areas studied were not “ecologically distinguishable from fished sites”.

The study chose 5 characteristics to describe a well run marine protected area, and found that only those MPAs which contained at least 4 of these characteristics were effective. These characteristics were that the areas were:  established for more then 10 years, allowed no fishing, were larger then 100km squared and are isolated by deep water or sand. When 4 or more of these were present it was shown that there was huge improvements in larger fish biomass with up to 14 times more shark biomass and 5 times more large fish biomass.

http://upload.wikimedia.org/wikipedia/commons/a/a6/Bunaken_Marine_Park.JPG

However 59% of MPAs were ineffective and  did not contain 4  or more of these characteristics, with only one of the 26 MPAs examined containing all 5. This means that simply saying an area is “a marine protected area” is not an effective strategy. The world must do more to ensure that these areas are researched to be important ecological areas and that these MPAs will be well enforced, allow no fishing, be larger then 100km squared and are isolated by deep water or sand.

Written by Andrew Hefford 

 

Are Europe and North America Losing the Battle for Science Supremacy?

Research. Image Credit: MedCityNews

For centuries, Western Europe and North America have resided at the centre of innovation, research, and scientific advancement. Starting with the Scientific Revolution, which saw the advancement of modern science, the major European countries began to assert their prowess in the intellectual arena. Jumping ahead, up through the age of Imperialism and into the Industrial Revolution of the mid-18th and 19th centuries, the United Kingdom emerged as the clear leader in scholarship and technological innovation. Beginning in the 19th century, the United states moves to the forefront of global scientific efforts; a place it arguably holds even today. Despite the storied history of western dominance of science in the modern age, recent research suggests a swing in the balance of power may be under way.

 Several recent articles in Nature News & Comment have reported that, over the last decade, China has slowly maneuvered its way to the top.  Specifically, China is now the world’s third-largest producer of scientific research articles and has nearly tripled the percentage of its gross domestic product (GDP) it invests in science and innovation. Even as the combined productivity of the European Union and US has declined, China’s own output has climbed from 3% to 11% since 2001. Furthermore, at 1.98% GDP investment in research and development in 2012, China has officially surpassed Europe and now places third, behind the US and Japan. Interestingly, while European investments remain relatively stagnant, China is set to increase to 2.5% GDP investment in R&D by 2020. No matter how one looks at it, China, and many other parts of Asia, are rapidly becoming global competitors in the race for science supremacy.

Perhaps more worrying that China’s rise in the ranks of international funding and scientific innovation and publishing, is the widespread decline of education is mathematics and science in western countries. The Paris-based Organisation for Economic Co-operation and Development (OECD), an association of 34 member countries aimed at aligning domestic and international policies, administers a test to assess the success of each countries teaching in mathematics, reading, and science. The Programme for International Student Assessment (PISA) is administered to 15-year-old students every three years, and is meant as a comprehensive performance review of education policies. Once the dominant contestants for the top 10 overall educational results, the 2012 PISA results show that western countries have rapidly fallen behind Asian constituents, with the US scoring below the OECD average in all three categories of interest.

Programme for International Student Assessment (PISA) Ranks. OECD 2012.

So has the time of western-led scientific advancement come to an end? Probably not. Although the current numbers show that the the EU and North America are lagging, the US has retained its position as the number one country for research and development and foreign direct investment. Furthermore, while China’s %GDP investment in research and innovation has surpassed that of the European Union, the total dollar-amount investment made by the EU still remains higher. Additionally, the same article discussing China’s recent growth in research out-put also noted that the US remains the leading producer of highly cited literature, whereas Chinese-published material is largely cited within China alone, and argues that this may be a case of quantity over quality. Lastly, international research collaboration and ‘big science’ is at an all time high, suggesting that while each country is  facing its own challenges, collaboration may allow for sharing of the burden.

– Joseph Burant

Empowering Autonomy in Scientific Education

When you think about undergraduate education, what do you visualize? In my mind, I picture large lecture halls filled with many students sitting shoulder-to-shoulder, in the fold-down chairs with the fold-up tables. At the front of the room, the professor lectures away while students quietly take notes for an upcoming exam. Sounds familiar, doesn’t it?

Typical university experience? (image via flickr by Alan Levine)

Don’t get me wrong- I’m not suggesting that lectures are unacceptable or a waste of time. Certainly, lectures has its place at large universities such as UBC. In fact, I think lectures are great because it allows many students to learn from incredibly knowledgeable professors. I will argue, however, that this should not be all there is. There needs to be more opportunities for student-centered learning, especially in science where discoveries depend on creativity, critical thinking and effective communication rather than passive accumulation of information.

Carl Rogers describes student-centered learning as a shift in power from the expert teacher to the student learner. Lea et al. (2003) emphasizes the importance of active learning where participation and involvement is essential for quality education. In recent years, the term student-centered learning has been increasingly used, along with flexible learning, experiential learning and self directed learning. The emergence of this proactive approach in education reflects today’s society where choice and democracy are important concepts.

But the fact that active learning is good is not breaking news. Rather, it’s quite obvious! So what’s the big deal anyway? The big deal is that “many institutions or educators claim to be putting student-centered learning into practice, but in reality they are not (Lea et al., 2003).” However, I do believe that UBC is indeed an advocate for student-centered learning.

This semester, as part of the UBC student directed seminars program, I am leading a course on the topic of traumatic brain injury. The UBC student directed seminars program allows undergraduate students to create their own 3-credit course for a 15 person maximum class. As I have strong interests in neuropsychology, I created a course that explores in depth how a traumatic brain injury can profoundly impact an individual’s life. From project conception to execution, UBC has provided me with all the resources, guidance and support I need to succeed.

The experience leading a seminar so far has taught me a lot regarding how to effectively communicate science. Our motto here at UBC is “Tuum Est” which means “make it yours”. Our undergraduate careers are too short (and expensive) to spend passively learning what we’re told. There are ways to personalize the experience of how we learn about science whether it’s through a hands-on research project, a student directed seminar or even service in the community. It’s important to find your passion, but it’s also important to then pursue that passion from different facets outside the traditional lecture.

Tuum est “Make it yours” (via UBC branding)

Written by: Vivian

 

A Positive New Outlook on Brain Activity and Aging

Aging comes with many worries, often related to health scares and a fear of cognitive decline. From personal experience, I know that even in our early twenties we’re told that our mental prowess has already diminished.   However a new study by Ramscar et al (2014) gives hope to those worried about their aging minds!

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In the past, studies have shown that memory not only deteriorates with time, but that the decline begins as early as 45 years old.

With continual medical advances, people are living longer and the average life expectancy in Canada is now 81 years old. This means that research into how brain activity and memory are affected with age is becoming extremely important in our society. Personally, I know that I would like to be able to keep up to date with modern scientific developments, and maybe even learn a third or fourth language when I’m well into my 60’s and 70’s.

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Ramscar’s study takes a different approach to memory than previous works, stating that old models for memory degradation “do not take account of the statistical skew  of human experience or the way knowledge increases with experience. As a consequence… [this] paint[s] a misleading picture of cognitive development.” His model/study instead shows that older adults appear to have a worse memory simply because they need to process through more information before finding an answer, causing their responses to be slower. The study also accounts for the fact that fine-detail memory differs with age and makes the claim that older populations “encode less contextual information”, simply because throughout their lives they learn to ignore what they think is useless background information.

I found this study to be extremely exciting and relevant, since the world’s population is becoming more and more top heavy (larger old population then young population). With studies like this, it becomes clear that research on cognitive diseases is extremely important since cognitive abilities remain fairly constant throughout our lives in the absence of disease.

Written by: Andrew Hefford