96 research outputs found
Multivariate Quantitative Representativeness and Constituency Analysis of Ecological Observation Networks
No full textCite this code as: Kumar, J. (2023). Multivariate Quantitative Representativeness and Constituency Analysis of Ecological Observation Networks (Version 1.0) [Computer software]. https://doi.org/10.5281/zenodo.8048530
Multivariate Quantitative Representativeness and Constituency Analysis of Ecological Observation Networks
Author: Jitendra (Jitu) Kumar ([email protected]), Oak Ridge National Laboratory
Regional and global ecological research networks, representing coordinated and standardized as well as adhoc networks of observation sites, provide valuable observations necessary for ecological modeling and synthesis studies. Studies conducted across observational networks strive to scale up their results to larger areas, trying to reach conclusions that are valid throughout regional, continental, and even global scales. Network representativeness and constituency can show how well conditions at those locations represent conditions elsewhere within a larger area containing the network and can be used to help scale-up results over larger regions.
Representativeness: Euclidean distance between two sites plotted in multivariate environmental space can be used as an inverse measure of multivariate similarity to quantify representativeness. Close sites in environmental space have a similar combination of environmental factors, and therefore are highly representative of each other.
Constituency: For any site in the network, its Constituency represent all locations that are best represented by the multivariate environmental drivers at that site.
Code Compilation:
make
Edit the ```makefile``` as needed for your platform.
CC=gcc
CFLAGS= -O3
hpea: network_representativeness.o\
utility.o
(CFLAGS) *.o -lm -o network_representativeness
.o:
(CFLAGS) -c $<
clean:
\rm *.o network_representativeness
Running the representativeness analysis:
Usage: network_representativeness -infile input data file [ASCII]
-coordsfile coordinate file name
-clustfile coordinate file name [OPTIONAL -- must be used with -siteclustfile]
-sitefile site data file name
-siteclustfile site data file name [OPTIONAL -- must be used with -clustfile]
-nsites No. of sites
-minmaxfile minmax file name
-outfile output file name
-nrows No. of rows in input data
-ncols No. of variables
-details [OPTIONAL -- turn on output representativeness for each site, default is to write network representativeness and constituency only.]
-help program usage help.
Publications using ```network_reprentativeness``` code:
Kumar, J., Coffin, A. W., Baffaut, C., Ponce-Campos, G., Witthaus, L., and Hargrove, W. W. (2023) "Quantitative Representativeness and Constituency of the Long-Term Agroecosystem Research Network, and Analysis of Complementarity with Other Existing Ecological Networks", Environmental Management (in press)
M. M. T. A. Pallandt, J. Kumar, M. Mauritz, E. A. G. Schuur, A.-M. Virkkala, G. Celis, F. M. Hoffman, and M. Göckede. Representativeness assessment of the pan-arctic eddy covariance site network and optimized future enhancements. Biogeosciences, 19(3):559--583, 2022. https://doi.org/10.5194/bg-19-559-2022
J. Kumar, F. M. Hoffman, W. W. Hargrove, and N. Collier. Understanding the representativeness of FLUXNET for upscaling carbon flux from eddy covariance measurements. Earth System Science Data Discussion, 2016:1--25, August 2016. https://doi.org/10.5194/essd-2016-36.If you use this software, please cite it as below.
Kumar, J. (2023). Multivariate Quantitative Representativeness and Constituency Analysis of Ecological Observation Networks (Version 1.0) [Computer software]. https://doi.org/10.5281/zenodo.804853
Europe's Hydrogen Pathways: Toward a balanced partnership with Saudi Arabia and the Gulf
No full textThis chapter analyzes the ongoing hydrogen developments of the 27 member states of the European Union and the states outside this treaty-based organization. The focus of this chapter is on current policy and regulatory developments, which have been turbocharged by the war in Ukraine and Europe’s rapidly developing export relations with fossil fuel exporters. Gulf players such as Saudi Arabia are long-standing energy partners for Europe. They not only have the capacity and know-how to produce low-carbon hydrogen and ammonia but also have the additional geopolitical and climate incentive to position themselves as reliable providers of clean energy imports for Europe. However, European policymakers and industries have yet to signal a coherent hydrogen import strategy. This chapter argues that this discord should be replaced by a coordinated European import strategy that balances renewable-based and low-carbon hydrogen. This should be based on a grounded assessment of production and demand capacities across Europe and of export partners such as Saudi Arabia.Energy and Industr
ChemInform Abstract: Glycerol‐Mediated Synthesis of 5‐Substituted 1H‐Tetrazole under Catalyst‐Free Conditions.
No full textEDTA functionalized magnetic nanoparticle as a multifunctional adsorbent for Congo red dye from contaminated water
No full text
Lifting of vector-valued automorphic forms
No full textRecently, the first author [1] showed that the admissible vector-valued
automorphic forms lift to the admissible ones. In this article, we study the
lifts for the logarithmic vector-valued automorphic forms and explicitly
compute the Fourier coefficients of the lifted vector-valued automorphic forms.Comment: 20 pages, revised following referee's suggestion
Budgetary Process in India: An Analysis
No full text“A Budget tells us what we can’t afford, but it doesn’t keep us from buying it”-William Feather (American Publisher; Author-1889-1981)(Holzer and Schwester 2011 p.289). In almost all the forms of government budget or budgeting falls within the jurisdiction of bureaucracy. The preparation of budget falls within the jurisdiction of public administration which is run and manned by civil servants. Hence budgeting is an important function of bureaucracy. But it alone cannot do everything about budgeting. In a parliamentary system of government every department is headed by a minister and at the head of finance department there is a minister who is called as finance minister The preparation of estimated expenditure and income is done under the guidance of the finance minister. In this paper I have tried my best to highlight the process of Indian budget with it’s historical development in a lucid manner.</jats:p
Pore morphology in thermally-treated shales and its implication on CO<sub>2</sub> storage applications: A gas sorption, SEM, and small-angle scattering study
No full textA combination of high-resolution imaging, low-pressure gas adsorption, and small-angle X-ray and neutron scattering quantifies changes in the pore characteristics of pulverized shale samples under oxic and anoxic environments up to 300 ℃. Clay-rich early-mature shales have a fair potential to generate hydrocarbons, the total organic carbon content of which lies within a range of 2.9 % to 7.4 %. High-resolution imaging indicates restructuring and coalescence of Type III kerogen-hosted pores due to oxic heating, which causes up to 580 % and 300 % increase in the surface area and pore volume of mesopores respectively. Similarly, up to 300 % and 1200 % increase in micropore surface area and pore volume is observed post oxic heating. However, during anoxic heating, bitumen mobilizes, leads to pore-blockage, and reduces the surface area and pore volume up to 45 % and 12 % respectively without any significant mass loss up to 350 °C. Between 400 and 550 °C, considerable loss in mass occurred due to breaking of organic matter, facilitated by the presence of siderite that caused up to 30 % loss in mass. The test conditions display starkly opposite effects in pores that have a width of < 100 nm when compared to the larger macropore domain, which has a pore width in the range of 100 to 700 nm as inferred from their small-angle X-ray (SAXS) and neutron (SANS) scattering behaviour, respectively. Despite the formation of new mesopores or the creation of new networks of pores with rougher surfaces, the fractal behavior of accessible mesopores in combusted shales minimally increase mesopore surface roughness. The pyrolyzed shales exhibit decreased mesopore surface roughness at higher temperatures, which indicates smoothening of pores due to pore blocking. Increase in pore volume and surface area due to oxic-heat treatment enhances the feasibility of long-term CO2 storage in shales.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Applied Geophysics and Petrophysic
- …
