Nabin K. Malakar, Ph.D.

NASA JPL
I am a computational physicist working on societal applications of machine-learning techniques.

Research Links

My research interests span multi-disciplinary fields involving Societal applications of Machine Learning, Decision-theoretic approach to automated Experimental Design, Bayesian statistical data analysis and signal processing.

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Interested about the picture? Autonomous experimental design allows us to answer the question of where to take the measurements. More about it is here...

Hobbies

I addition to the research, I also like to hike, bike, read and play with water color.

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Wednesday, May 25, 2016

Special Issue "Sustainability in the Mountains Region"




Mountains are a part of the global biodiversity repository, play a vital role in maintaining global ecosystems, while supporting millions of people. In the meantime, they are the most vulnerable ecosystems. Changes in the environment and economic priorities in past few decades have considerably influenced the livelihood and sustainability of mountains globally. The effects of changing climate and other socioeconomic factors on mountains can affect the densely populated and underdeveloped regions to an inconceivable scale. It is, therefore, important that we study the impacts of climate change, changes in economic priorities of the mountain residents, and increasing non-conventional values of mountain ecosystems and its inhabitants. Moreover, the factors affecting the sustainable livelihood of mountain inhabitants need to be carefully studied to assess the short and long-term impacts, and to develop a long-term strategy for improving the livelihood of the residents in the face of the changes.
This Special Issue will feature peer-reviewed papers from the international conference on “Mountains in the Changing World (MoChWo)”, to be held in Kathmandu, Nepal, on 1–2 October, 2016 (http://conference.kias.org.np). The conference and the Special Issue aim to provide a forum for international/national scholars, researchers, policy makers, and students with an opportunity to share their research findings and knowledge related to various aspects of mountains.  
The range of relevant topics include:
  • Environmental, economic and social sustainability
  • Land use and land cover monitoring, natural disaster and risk assessment
  • Decision making and societal impacts, policy and management strategies for sustainable development
  • Citizen science and trainings
  • Remote sensing, and mapping of resources
  • Data fusion, and data visualization relevant to sustainability issues
  • Innovation in renewable and alternative energy
  • Pesticide uses and sustainable agriculture
  • Organic farming
We welcome papers from broadly defined topics that are relevant to the theme of the Special Issue.
Dr. Nabin K Malakar
Dr. Rajan Ghimire
Dr. Jhalendra Rijal
Dr. Pradeep Wagle
Guest Editors
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Friday, April 8, 2016

An Interview with Dr. Mike Abrams, #ASTER project leader @NASAJPL

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument has been flying in space on the Terra platform since its launch in 1999. Not bad for a satellite which had an expected lifespan of five-years. Hopefully it will continue into the foreseeable future. The instrument acquires images in visible, near infrared, and thermal infrared wavelengths (TIR). The spatial resolution range from 15 to 90 meters. ASTER spans +- 83 degree latitudes, and covers 99 percent of earth's landmass.  ASTER also produces one of the high resolution elevation dataset (30m).
Recently, NASA released the complete archive (2.95 million images) of Earth's thermal infrared images to the public with unlimited access. Previously, users could access ASTER's global digital topographic maps for free, however, other ASTER data products were available at nominal fee paid to Japan’s Ministry of Economy, Trade and Industry (METI).
ASTER has been used to study, map, and monitor the ever-changing surface of our planet Earth. Some of the products and application of ASTER data include surface mapping and monitoring of changes in surface properties such as glacial advance/retreat, volcanism, crop stress, cloud properties, wetlands, coral reef degradation, land surface temperature, surface geology, etc.

A good selection of ASTER images can be found on the ASTER web site, gallery pages:

The dataset is available at:

We stopped by the office of Dr. Mike Abrams, the project leader for ASTER science team at NASA JPL.
Here are 5 quick questions with him:

1. Please share your experience with the ASTER project.
I have been involved with the ASTER project since its inception in 1988 as part of NASA’s Earth Observing System (EOS) program. Working with my Japanese colleagues and traveling to Japan has been an enriching inter-cultural experience. Added to that is the satisfaction of the success of our 16-year joint mission
2. Why are the millions of ASTER images being made public?
In Japan, oversight of the ASTER project was transferred from one organization to another. The new operator is part of Japan’s National Science Institutes. Jointly, with NASA, the decision was made to eliminate charging for all ASTER data.

3. How can users get maximum use out of the ASTER data?
Natural color, full resolution JPEG images can be downloaded for all images in the archive. No sophisticated software is needed to view these images. (https://lta.cr.usgs.gov/terralook/home). To do more in-depth analyses, the digital data must be downloaded, then analyzed with GIS or image processing software.

4. What are the unique feature of ASTER? (Some examples of news for societal benefit.)
Our high resolution, global Digital Elevation Model (DEM) data set is unique. It is the only topographic data freely available to all users covering the land surface of the Earth at 30m resolution. We have a vigorous monitoring program of 1500+ active volcanoes, and 100,000+ glaciers, looking for time-dependent change. We also acquire many images for post-disaster mitigation, like damage from tsunamis.
5. Do you have favorite image(s) of ASTER?
See the interview with National Geographic: http://news.nationalgeographic.com/2016/04/160406-pictures-nasa-terra-aster-satellites-space-science/

A selfie with Dr. Abrams.
Note: I had an opportunity to be a co-author with him on the paper:
The ASTER Global Emissivity Dataset (ASTER GED): Mapping Earth's emissivity at 100 meter spatial scale, GC Hulley, SJ Hook, E Abbott, N Malakar, T Islam, M Abrams
Geophysical Research Letters 42 (DOI: 10.1002/2015GL065564)
http://onlinelibrary.wiley.com/doi/10.1002/2015GL065564/full