Amidu Oloso

Amidu Oloso
Science Systems and Applications, Inc. | SSAI

About

29
Publications
4,003
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
833
Citations
Citations since 2017
6 Research Items
502 Citations
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100

Publications

Publications (29)
Poster
Full-text available
Accepting computer modeling as science often hinges on one's concept of believability. Complex models of complex things put a particular strain on believability, and in some cases, create intense and widespread discord. In many ways this problem is akin to that of a Turing test; scientists are asked to compare two very complicated entities (say cli...
Presentation
Full-text available
Accepting computer modeling as science often hinges on one's concept of believability. Complex models of complex things put a particular strain on believability, and in some cases, create intense and widespread discord. In many ways this problem is akin to that of a Turing test; scientists are asked to compare two very complicated entities (say cli...
Presentation
Full-text available
Data preparation is the necessary but unproductive part of machine learning that takes disproportionate effort and time. We introduce the technologies that we have developed to simplify and accelerate data preparation and ease geoscience machine learning using large volumes and varieties of data.
Presentation
Full-text available
Among all the V’s of Big Data challenges, such as Volume, Variety, Velocity, Veracity, etc., we believe Value is the ultimate determinant, because a system delivering better value has a competitive edge over others. Although it is not straightforward to assess the value of scientific endeavors, we believe the ratio of scientific productivity increa...
Presentation
Full-text available
There is little doubt that machine learning techniques possess the potential to timely extract information, knowledge, and even prediction from seas of Earth Science (ES) data and help in answering some of the pressing questions regarding the intricate systems of our planet. However, it is reported that data preparation, necessitated by subsetting...
Poster
Full-text available
Integrating Earth Science data from diverse sources such as satellite imagery and simulation output can be expensive and time-consuming, limiting scientific inquiry and the quality of our analyses. Reducing these costs will improve innovation and quality in science. The current Earth Science data infrastructure focuses on downloading data based on...
Poster
Full-text available
A superbly optimized method has been developed for a Big Data technology, whereby events of Earth Science phenomena can be identified and tracked with unprecedented efficiency. An event in this context is an episode of a phenomenon evolving in both space and time and not just a snapshot in time. This innovative method is applied to 36 years of both...
Conference Paper
Full-text available
We investigate the impact of data placement on two Big Data technologies, Spark and SciDB, with a use case from Earth Science where data arrays are multidimensional. Simultaneously, this investigation provides an opportunity to evaluate the performance of the technologies involved. Two datastores, HDFS and Cassandra, are used with Spark for our com...
Conference Paper
Full-text available
We have implemented an updated Hierarchical Triangular Mesh (HTM) as the basis for a unified data model and an indexing scheme for geoscience data to address the variety challenge of Big Earth Data. In the absence of variety, the volume challenge of Big Data is relatively easily addressable with parallel processing. The more important challenge in...
Conference Paper
Full-text available
We have implemented a flexible User Defined Operator (UDO) for labeling connected components of a binary mask expressed as an array in SciDB, a parallel distributed database management system based on the array data model. This UDO is able to process very large multidimensional arrays by exploiting SciDB's memory management mechanism that efficient...
Presentation
Full-text available
Snowstorm climatology derived from NASA MERRA reanalysis as an example for event-based virtual collections. * Used MERRA-2 data; * Snowstorms over land (no over land-ice) are identified and tracked.
Technical Report
SIVO-PyD gathers and automatically installs (in various computing platforms) a collection of Python-related packages for scientific computing and visualization. All of the packages in distribution are accessible within the Python framework. The distribution is self-contained and can be extended with minimal work. The design philosophy for SIVO-PyD...
Conference Paper
Full-text available
The performance and ease of extensibility for two Big-Data technol-ogies, SciDB and Hadoop/MapReduce (HD/MR), are evaluated on identical hardware for an Earth science use case of locating intersec-tions between two NASA remote sensing satellites' ground tracks. SciDB is found to be 1.5 to 2.5 times faster than HD/MR. The per-formance of HD/MR appro...
Technical Report
A Python application that enables a user to execute a series of independent tasks on multicore clusters.
Article
Full-text available
We present a description of the ModelE2 version of the Goddard Institute for Space Studies (GISS) General Circulation Model (GCM) and the configurations used in the simulations performed for the Coupled Model Intercomparison Project Phase 5 (CMIP5). We use six variations related to the treatment of the atmospheric composition, the calculation of ae...
Article
NASA's High Performance Computing Portfolio in cooperation with its Modeling, Analysis, and Prediction program intends to make its climate and earth science models more accessible to a larger community. A key goal of this effort is to open the model development and validation process to the scientific community at large such that a natural selectio...
Conference Paper
Filesystems continue to be a major performance bottleneck for many applications across a variety of hardware architectures. Most existing attempts to address this issue, e.g., PVFS, rely upon system resources which are not typically tuned for any specific user application, whereas others rely on special hardware capabilities such as shared-memory.W...
Article
Full-text available
A locust bean dehuller was developed so as to reduce the amount of time and labour required in the traditional manual dehulling of African locust bean (Parkia biglobosa) seeds, which are processed into a food condiment and flavouring agent that is popular in many African countries. The dehuller principally consists of two concentric cylinders, a po...
Chapter
This chapter describes an approach to modeling heliospheric plasmas under the magnetohydrodynamics (MHD) approximation using complex time-dependent boundary conditions, parallel computations, and adaptive mesh-refinement. It addresses the issues relating to these and parallel performance of the fully-multidimensional code, which is based on the Flu...
Conference Paper
This work presents a complete methodology for use of an advanced CFD code in aerodynamic shape-design optimization of realistic aircraft configurations using massively parallel computers. Flow shape-sensitivity derivatives based on the 3-D Euler equations are accurately obtained with a parallel implementation of an advanced new sensitivity analysis...
Article
A hybrid automatic differentiation/incremental iterative method was implemented in the general purpose advanced computational fluid dynamics code (CFL3D Version 4.1) to yield a new code (CFL3D.ADII) that is capable of computing consistently discrete first order sensitivity derivatives for complex geometries. With the exception of unsteady problems,...
Article
Quasi-static compression tests were carried out on roasted cashew nuts to study the effect of moisture content, predamage type and direction of loading on failure force, failure deformation and energy absorbed to the point of failure. All of the factors examined had a significant effect (p < 0·01) on the measured parameters and also on the pattern...
Article
A solar dryer was designed for drying yam (Dioscorea rotundata) flakes and cassava (Manihot utilissima) chips and constructed from locally available materials. The performance of the dryer was tested and yielded very promising results. One major factor considered in the design was to ensure ease of fabrication with readily available local materials...

Network

Cited By

Projects

Projects (2)
Project
Enable combination of diverse Earth Science data (spacecraft swath, grid, point, etc.) via an efficient, high-performance indexing supporting the use of massive distributed computing and storage resources.