Category: Repost


Dear Students, if you would like to improve your ability to learn, you should read this article called “Strengthening the Student Toolbox” by Professor John Dunlosky, published in the American Educator. The article synthesizes an enormous volume of cognitive psychology and education research to present and explain the 10 most effective learning strategies. These strategies are listed below, and an explanation of each is provided in the original article; the strategies can be used by anyone and do not require computer-driven tutors. The effectiveness of these strategies was typically determined by improved performance on tests. While formal testing will diminish after college, informal testing remains part of life so take these strategies with you post-college. You will be most effective if you can recall pertinent information for your life of work or leisure.

Top 10 Learning Strategies:

  1. Practice testing: self-testing or taking practice tests on to-be-learned material.
  2. Distributed practice: implementing a schedule of practice that spreads out study over time.
  3. Interleaved practice: implementing a schedule of practice that mixes different kinds of problems, or a schedule of study that mixes different kinds of material, within a single study session.
  4. Elaborative interrogation: generating an explanation for why an explicitly stated fact or concept is true.
  5. Self-explanation: explaining how new information is related to known information, or explaining steps taken during problem solving.
  6. Rereading: restudying text material again after an initial reading.
  7. Highlighting and underlining: marking potentially important portions of to-be-learned materials while reading.
  8. Summarization: writing summaries (of various lengths) of to-be-learned texts.
  9. Keyword mnemonic: using keywords and mental imagery to associate verbal materials.
  10. Imagery for text: attempting to form mental images of text materials while reading or listening.

Illustration for article by John Dunlosky in American Educator, fall 2013,

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In this blog I share Imme Ebert-Uphoff’s and Yi Deng’s step-by-step cartoon guide to solve environmental problems faster. It starts with recognizing the career of an environmental engineer very much overlaps with earth science and data science, as fields of endeavor and the professionals in those fields. Like earth scientists, environmental engineers monitor and model the world to understand its components, processes, and systems. Like data scientists, environmental engineers query the data to explore relationships between components and across space and time. The American Geophysical Union in their EOS publication has provided an article with guidance on how to coordinate work between earth scientists and data scientists. Environmental engineers can benefit from this guidance, helping us not just in collaboration, but designing our activities in data collection and mining. Below I post this EOS article, “Three Steps to Successful Collaboration with Data Scientists“, by Imme Ebert-Uphoff and Yi Deng.

A step-by-step cartoon guide to efficient, effective collaboration between Earth scientists and data scientists.

By  and Yi Deng 

The vast and rapidly increasing supply of new data in the Earth sciences creates many opportunities to gain scientific insights and to answer important questions. Data analysis has always been an integral component of research and education in the Earth sciences, but mainstream Earth scientists may not yet be fully aware of many recently developed methods in computer science, statistics, and math.

The fastest way to put these new methods of data analysis to use in the Earth sciences is for Earth scientists and data scientists to collaborate. However, those collaborations can be difficult to initiate and even more difficult to maintain and to guide to successful outcomes. Here we break down the collaboration process into steps and provide some guidelines that we have found useful for efficient collaboration between Earth scientists and data scientists. We base our structure on discussions with many researchers working in similar areas and on our own experience, gained from more than 6 years of collaboration on related topics.

Knowledge Discovery from Data

The data analysis methods we are concerned with are those that seek to identify new knowledge: discovering patterns, revealing interactions between different processes, or yielding other types of insights that can be interpreted by Earth scientists and eventually attributed to some physical effect. We refer to these types of methods as knowledge discovery from data.

Some of these new methods come from the fields of deep learning (using artificial neural networks), causal discovery (using probabilistic graphical models that describe cause-and-effect relationships), and self-organizing maps. Artificial neural networks, for example, have been used to predict air quality and the occurrence of severe weather: These networks have been used to derive nonlinear transfer functions that convert observations to important geophysical parameters. Causal discovery has been used to identify information flow (the pathways between cause and effect) in the atmosphere around the globe. Self-organizing maps are becoming a preferred tool to classify recurring atmospheric flow features such as jet streams.

Meet the Scientists

How do Earth scientists and data scientists get acquainted and begin to work together? Meet Peter and Andrea, our two companions in this article (Figure 1). Peter is an Earth scientist. He studies important geoscience questions, often based on data from observations and computer model simulations. Andrea is a data scientist. She studies the newest data analysis methods developed in statistics, data mining, and machine learning. Let’s follow Peter and Andrea as they meet and move through the three major phases of their collaboration experience.

How did Peter and Andrea find each other? They might have run into each other on campus. Maybe one of them attended a talk given by the other. Or maybe a common colleague connected them. If they were actively looking for such collaboration, they might have met at an activity designed to establish new collaborations between Earth and data scientists, such as the annual Climate Informatics workshop or the Intelligent Systems for Geosciences (IS-GEO) Research Collaboration Network.

Once they met, they briefly talked one on one about the methods for data analysis that Andrea is using and about science questions that Peter is interested in. A 15-minute in-person meeting may have been all that was needed for them to discover some common interest and to set up a longer meeting to discuss potential collaboration.

Would it have been better for Andrea to just read papers from the Earth sciences to identify science questions that might be a good match and then to contact the authors for potential collaboration? It is possible that she could find a good collaborator that way. However, Andrea’s chances for success would be small, unless she already has a solid background in Earth sciences, because of the complexity of identifying problems to work on.

Flow chart of data and Earth scientist process.
Fig. 1. Peter and Andrea followed an iterative process in which they (top) defined the problem and approach, (middle) conducted experiments, and (bottom) evaluated the results and translated them back into Earth science language. Cartoon figures are from Clipart Of LLC. Click the image to see a larger version.

Research Phase 1: Defining the Research Problem and Approach

Peter and Andrea begin their research collaboration by defining a problem and choosing an approach to solving it (Figure 1, top right). This first phase is an iterative process that must take into account many different and inherently coupled aspects.

On the Earth science side, this task requires knowledge of which science questions are important and not yet fully understood and knowledge of available data sets. It also requires a deep understanding of the physical processes and interactions being investigated, the temporal and spatial scales at which these interactions take place, and most importantly, intuition of what aspect of a science question might benefit significantly from “mining” large amounts of data with innovative approaches.

On the data science side, this task requires a solid understanding of available data analysis methods and what insights can realistically be gained from them. The task also requires knowing the associated data requirements (minimal sample size and distribution assumptions) and computational effort, as well as common pitfalls and how to avoid them.

The aspects from both sides are inherently coupled: For example, to figure out which algorithm to use, our collaborators first need to understand the properties of the available data and the types of insights they want to gain. Thus, neither Peter nor Andrea can define the research problem in isolation. To define a feasible and meaningful research project, they must work closely together and have frequent conversations. They need to be open-minded and willing to learn the basic vocabulary and way of thinking of each other’s disciplines.

Research Phase 2: Conducting Experiments on the Data

In the second phase, the researchers conduct experiments on the data, such as trying different data analysis methods (Figure 1, middle right). This step sounds like a job mainly for Andrea, but if Andrea works in isolation, there is a good chance that she will take many unnecessary detours that might even cause her to get lost and give up on the project altogether. Only Peter knows what kind of preprocessing or other modifications might help to expose the signals or patterns in the data that they seek to discover.

Therefore, this step also requires constant communication between Peter and Andrea. Every time Andrea tries a new approach, Peter needs to look closely at the results and provide suggestions on how additional preprocessing of the data, focusing on a different spatial or temporal resolution, focusing on a specific geographical area, or rephrasing the scientific question may get the team closer to useful results.

Research Phase 3: Evaluation and Interpretation

Once Peter and Andrea obtain promising results, they need to evaluate them (Figure 1, bottom right). Do the results represent a real physical phenomenon, or are they merely an unforeseen by-product of the data collection or analysis method? Economist and Nobel laureate Ronald Coase once said, “if you torture the data long enough it will confess.”

Thus, before presenting the results as facts of the actual physical processes they studied, Peter and Andrea need to verify that the patterns are, indeed, properties of the underlying system, not just artifacts of the specific data set and analysis method. Ultimately, Peter needs to check whether the results are robust, make physical sense, and can be explained by known or hypothesized interactions in the considered Earth system.

What Does It All Mean?

The last tasks of phase 3 lead us to the final step of the project, namely, to fully understand what the results mean in the context of the science question they set out to address. Do Peter and Andrea’s results answer the original question they asked? What exactly did they learn?

Only if Peter and Andrea take the time to translate the research results back into the real world of physics, dynamics, chemistry, and geosciences and spell out all the implications for the considered Earth system will anyone in the Earth science community care about the results. Peter obviously plays the bigger role in this last step, but he still needs continuous feedback from Andrea to help him interpret the results correctly because only she knows about weaknesses or limitations of the method.Peter and Andrea learned that they have to work together very closely at every step of their joint project because all their decisions require a deep understanding of both Earth science and data analysis disciplines. Each of them had to be curious about the other’s discipline and also be willing to teach some basic skills or knowledge of their own discipline to the other person. Through this process, they each gained at least some very basic understanding of the nature of the other’s discipline, including its way of thinking, relevant concepts, and terminology.

Working closely together and learning about the other’s field not only made Peter and Andrea’s current collaboration run much more smoothly than it otherwise would have; it also created ideas for future projects. Through close collaboration, Peter and Andrea learned about each other’s fields even as they were contributing to them.

—Imme Ebert-Uphoff (email: iebert@colostate.edu), Department of Electrical and Computer Engineering, Colorado State University, Fort Collins; and Yi Deng, School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta

Citation: Ebert-Uphoff, I., and Y. Deng (2017), Three steps to successful collaboration with data scientists, Eos, 98,https://doi.org/10.1029/2017EO079977. Published on 30 August 2017.

Take a look at these 13 pictures that capture a year of stunning science and engineering. Here we re-post a the picture rich story from Nature, “In 2013, our Universe continued to amaze and delight as it was probed and prodded by scientists. During the course of the year, the gaze of researchers ranged near and far, from the vast to the minuscule, providing stunning visions of space and capturing images of the very bonds that tie molecules together. This is our selection of the pictures that highlight science’s, and nature’s, triumphs”

 

NASA/JPL-Caltech/SSI

FAR OUT

Peer carefully at the lower right of this image and you might just spot the tiny dot that is Earth, seen from more than a billion kilometres away. This vista of Saturn’s famous rings backlit by the Sun was assembled from 141 individual images taken by NASA’s Cassini probe after it moved into Saturn’s shadow in July.

Marat Ahmetvaleev

FIRE IN THE SKY

This huge fireball was created by the largest meteor known to hit Earth since the Tunguska rock landed in 1908. Russia was once again the unlucky recipient: the meteor exploded some 30 kilometres above Chelyabinsk in the Urals and shone brighter than the Sun.

Xiaohui Qiu/Science/AAAS

VISUAL LINK

Chemists have become almost blasé about taking images of individual atoms. But with skilful use of atomic force microscopy, researchers in Beijing managed to capture the first pictures of hydrogen bonds, seen here as faint lines between four molecules of 8-hydroxyquinoline.

Kwanghun Chung & Karl Deisseroth/HHMI/Stanford Univ.

MIND READER

This is one of the first ‘transparent brains’ to be made with CLARITY, a neuroimaging method that renders brains — in this case a mouse hippocampus — transparent by stripping away lipids with detergent. The technique reveals neurons in three-dimensions, instead of conventional two-dimensional slices.

Satoshi Takeuchi

MAGIC MOMENT

Reminiscent of an art installation, these γ-ray detectors in Japan captured evidence that calcium atoms with 20 protons and 34 neutrons are stable, identifying 34 as a ‘magic number’ of nuclear stability.

Dominic Clarke/Science/AAAS

FLOWER POWER

These images show faint electric fields around an idealized flower. UK researchers found that bees sense these fields: one bee leaves a positive charge behind and others can use it to decide whether to visit the flower.

Dimitry Papkov/Joel Brehm/Yuris Dzenis

SMALL AND MIGHTY

Made of polyacrylonitrile, these nanofibres seem to defy logic — the thinner they get, the stronger and tougher they become. Made by electrospinning, in which a tiny charge draws fibres from a liquid, their slim build makes them up to ten times stronger than thicker versions currently used in optics and electronics.

Jamey Stillings

SOLAR STATION

This sci-fi-esque scene offers a glimpse of the future. Solar-power installations — such as this one at the Ivanpah Dry Lake in California, where the Sun’s rays boil water to drive a turbine — grew in number and size in 2013. Some estimates predict that this source of energy will soon overtake wind power.

Tui De Roy/Minden Pictures/FLPA

BROUGHT TO LIGHT

The olinguito (Bassaricyon neblina) was a rare find: a new land-mammal species discovered in the forests of the Andes. A member of the racoon family, the creature was formally described in August after a search prompted by previously misidentified museum specimens — although it turned out that an olinguito had previously been kept in US zoos.

Erik Rosolowsky/ALMA Radio Telescope

BLOWING IN THE WIND

A mass equivalent to nine Suns is blown out from the galaxy NGC 253 every year by a powerful space wind. The ALMA radio telescopes in Chile imaged the carbon monoxide in this wind in unprecedented detail and revealed the extent of the ejection. Regions of low emission intensity are red, and those of high intensity are blue-purple.

Aaron LeBlanc

ANCIENT YOUNG

Dating to around 195 million years ago, this bone (shown in cross-section) comes from a dinosaur embryo. It is one of about 200 such bones sampled from a bone bed in China. The rare finds offered fresh data on dinosaur development.

Jose Jacome/EPA/Corbis

OLD FLAMES

Tungurahua in Ecuador has been erupting near-continuously since 2010, and sporadically since at least 7,750 bc. The volcano has provided a wealth of scientific data, including a study this year showing that local settlements were devastated in an eruption in 1,100 bc, making it the site of one of the oldest-known volcanic disasters in the Andes.

Kirsten Faurie/Kanabec County Times/www.MoraMinn.com

BONUS ONLINE-ONLY EDITORS’ CHOICE

Although this image didn’t make our end-of-year print piece, it captivated our selection team. It shows Terry Headley, a volunteer with the University of Minnesota Raptor Center, rescuing an injured bald eagle in April.